Session ID: c685821f-28dd-4f3d-9647-5b1848cb58fa
Project: /Users/llimllib/code/mdriver/features
Start Time: 2026-01-24T12:37:45.737Z
End Time: 2026-01-24T13:03:38.322Z
Total Messages: 505
User Messages: 123
Assistant Messages: 227
Tool Uses: 116
Models Used: claude-opus-4-5-20251101
[2026-01-24 12:37:45]
what features from gfm are we not supporting
[2026-01-24 12:37:49]
💭 Internal Reasoning (click to expand)
The user wants to know what GFM (GitHub Flavored Markdown) features are not currently supported in mdriver. I should look at the GFM spec and compare it with the current implementation to understand what's missing.
Let me first explore what's currently implemented in the codebase, and then compare against the GFM spec.
[2026-01-24 12:37:50]
I'll explore the codebase to understand what's currently implemented and compare it against the GFM spec.
[2026-01-24 12:37:53]
🔧 Tool Use: Task (ID: toolu_01XZHQR5JhyhrfRMKv1SbXJr)
{
"description": "Find unsupported GFM features",
"prompt": "Compare the mdriver implementation against the GFM spec to identify which GFM features are NOT currently supported.\n\n1. First, look at the GFM spec (gfmspec.md) to understand what features GFM defines\n2. Then examine the current implementation in src/lib.rs to see what's implemented\n3. Also check the test fixtures in tests/fixtures/ to see what's being tested\n\nProvide a comprehensive list of GFM features that are NOT supported, organized by category (block-level elements, inline elements, GFM extensions, etc.)",
"subagent_type": "Explore"
}[2026-01-24 12:40:36]
📊 Tool Result:
[{'type': 'text', 'text': 'Perfect! Now I have enough information to compile a comprehensive report. Let me create the final analysis:\n\nBased on my thorough analysis of the mdriver implementation compared against the GFM specification, here is a comprehensive list of GFM features that are NOT currently supported:\n\n## Comprehensive GFM Features Gap Analysis\n\n### BLOCK-LEVEL ELEMENTS NOT SUPPORTED\n\n#### 1. **Indented Code Blocks** (GFM 4.4)\n - **Status**: NOT IMPLEMENTED\n - **Details**: 4+ space indented code blocks are not recognized as code blocks\n - **Spec requirement**: Lines indented 4+ spaces should form code block content\n - **Note**: Implementation detects indented content in lists, but not as standalone code blocks\n\n#### 2. **HTML Blocks** (GFM 4.6)\n - **Status**: NOT IMPLEMENTED\n - **Details**: Seven types of HTML blocks defined in spec are not recognized:\n - Type 1: `<script>`, `<pre>`, `<style>` tags with specific start/end conditions\n - Type 2: HTML comments `<!-- ... -->`\n - Type 3: Processing instructions `<? ... ?>`\n - Type 4: Declarations `<! ... >`\n - Type 5: CDATA sections `<![CDATA[ ... ]]>`\n - Type 6: Complete HTML tags (address, article, aside, blockquote, body, etc.)\n - Type 7: Complete open/closing tags with whitespace/end-of-line\n - **Current behavior**: Limited HTML tag parsing exists for inline HTML, but not block-level HTML block recognition\n\n#### 3. **Blank Lines** (GFM 4.9)\n - **Status**: PARTIALLY IMPLEMENTED\n - **Details**: Blank lines are recognized for block termination, but semantic handling may be incomplete for edge cases\n - **Missing**: Proper blank line precedence rules in all contexts\n\n### INLINE ELEMENTS NOT SUPPORTED\n\n#### 1. **Backslash Escapes** (GFM 6.1)\n - **Status**: NOT IMPLEMENTED\n - **Details**: ASCII punctuation character escaping with backslash (`\\!`, `\\"`, `\\#`, etc.)\n - **Current behavior**: Backslash handling exists only for hard line breaks\n - **Missing**: Full backslash escape support for markdown special characters\n\n#### 2. **Entity and Numeric Character References - PARTIAL** (GFM 6.2)\n - **Status**: PARTIALLY IMPLEMENTED\n - **Details**: \n - **Supported**: Limited HTML entity map (amp, lt, gt, quot, apos, nbsp, ndash, mdash, hellip, copy, reg, trade, etc.)\n - **Missing**: \n - All 5000+ HTML5 entity names from spec\n - Decimal numeric references (`#`)\n - Hexadecimal numeric references (`{` or `{`)\n - Invalid Unicode code point handling (U+0000 replacement)\n\n#### 3. **Code Spans - LIMITED** (GFM 6.3)\n - **Status**: PARTIALLY IMPLEMENTED\n - **Details**: \n - **Supported**: Basic single/double backtick code spans (`` `code` `` and ``` `` code `` ```)\n - **Missing**:\n - Proper backtick string matching (N backticks to close N backticks)\n - Line ending normalization to spaces\n - Space stripping only when both sides have space and not all spaces\n - Complex backtick sequences\n\n#### 4. **Emphasis and Strong Emphasis** (GFM 6.4)\n - **Status**: SIMPLIFIED IMPLEMENTATION\n - **Details**: \n - **Supported**: Basic `*italic*`, `**bold**`, `_italic_`, `__bold__` with find-closing approach\n - **Missing** (complex GFM rules):\n - Left-flanking and right-flanking delimiter run rules\n - Can-open and can-close delimiter conditions\n - Proper precedence and parsing (e.g., `*foo *bar* baz*` edge cases)\n - Full emphasis parsing algorithm per GFM spec section 6.4\n\n#### 5. **Autolinks** (GFM 6.8)\n - **Status**: MINIMAL SUPPORT\n - **Details**:\n - **Supported**: Some basic link syntax (`<http://example.com>`)\n - **Missing**:\n - Email autolinks (`<[email protected]>`)\n - Proper validation of autolink URL formats\n\n#### 6. **Autolinks Extension** (GFM 6.9) - NOT IMPLEMENTED\n - **Status**: NOT IMPLEMENTED\n - **Details**: Extended autolinks not recognized:\n - Extended www autolinks (`www.example.com`)\n - Extended URL autolinks (`http://` and `https://` without angle brackets)\n - Extended autolink path validation (trailing punctuation rules)\n - Parentheses balancing rules for URLs\n\n#### 7. **Raw HTML** (GFM 6.10)\n - **Status**: MINIMAL SUPPORT\n - **Details**:\n - **Supported**: Some inline HTML tags parsed and passed through\n - **Missing**: Full raw HTML block/inline precedence rules per spec\n\n#### 8. **Disallowed Raw HTML** (GFM 6.11 - Extension) - NOT IMPLEMENTED\n - **Status**: NOT IMPLEMENTED\n - **Details**: No filtering of dangerous HTML tags/attributes as per GFM security rules\n\n#### 9. **Soft Line Breaks** (GFM 6.13)\n - **Status**: NOT IMPLEMENTED\n - **Details**: Soft line breaks (newline not followed by spaces/backslash) should render as space\n - **Current behavior**: Not explicitly handled\n\n### GFM EXTENSION FEATURES\n\n#### 1. **Strikethrough** (GFM 6.5 - Extension)\n - **Status**: SUPPORTED (`~~text~~`)\n - **Note**: This is properly implemented\n\n#### 2. **Task List Items** (GFM 5.3 - Extension)\n - **Status**: PARTIALLY IMPLEMENTED\n - **Details**:\n - **Supported**: Basic parsing of `- [ ]` and `- [x]` syntax\n - **Note**: See list-related limitations below\n\n#### 3. **Tables** (GFM 4.10 - Extension)\n - **Status**: SUPPORTED\n - **Details**: Basic table parsing with alignment is implemented\n - **Missing**: Some complex table edge cases and multi-line cell content\n\n### CONTAINER BLOCK LIMITATIONS\n\n#### 1. **Lists** - Complex Rules Not Fully Implemented (GFM 5.2, 5.4)\n - **Current**: Basic list parsing works\n - **Missing**:\n - Tight vs. loose list handling (when list items should have `<p>` tags)\n - Multi-paragraph list items with proper indentation\n - Complex nesting scenarios\n - Ordered list marker interruption rules\n - List item interruption by other block types\n\n#### 2. **Block Quotes** - Lazy Continuation (GFM 5.1)\n - **Current**: Basic blockquote parsing with lazy continuation\n - **Missing**: Full spec compliance on nesting and interruption\n\n### COMPLEX PARSING ISSUES\n\n#### 1. **Precedence and Interruption Rules**\n - Many rules about what can interrupt what are simplified or missing\n - Example: Code fences inside lists have special handling but may not cover all cases\n\n#### 2. **Link Reference Definitions** - Multiline Support (GFM 4.7)\n - **Status**: LIMITED\n - **Details**:\n - **Supported**: Basic single-line `[label]: url "title"` syntax\n - **Missing**: \n - Link titles spanning multiple lines\n - Proper whitespace normalization per spec\n\n#### 3. **Indentation Rules**\n - Tab expansion (4-character tab stops) - may not be fully implemented\n - 3-space indentation thresholds in various contexts\n\n### SUMMARY TABLE\n\n| Feature Category | Status | Details |\n|---|---|---|\n| **ATX Headings** | ✅ Supported | Works correctly |\n| **Setext Headings** | ✅ Supported | Works correctly |\n| **Thematic Breaks** | ✅ Supported | Works correctly |\n| **Fenced Code Blocks** | ✅ Supported | Works correctly |\n| **Indented Code Blocks** | ❌ Not Implemented | Missing entirely |\n| **Paragraphs** | ✅ Supported | Works correctly |\n| **Block Quotes** | ✅ Supported | Works correctly |\n| **Lists** | ⚠️ Partially | Basic support, missing complex rules |\n| **HTML Blocks** | ❌ Not Implemented | All 7 types missing |\n| **Link Definitions** | ⚠️ Partially | Single-line only |\n| **Emphasis** | ⚠️ Simplified | Basic support, missing complex rules |\n| **Code Spans** | ⚠️ Partially | Basic backticks, missing advanced features |\n| **Links** | ✅ Mostly Supported | Basic inline and reference links work |\n| **Images** | ✅ Supported | Markdown and HTML img tags |\n| **Autolinks** | ⚠️ Minimal | Basic angle-bracket form, missing extended forms |\n| **Extended Autolinks** | ❌ Not Implemented | www. and http(s):// forms missing |\n| **HTML (inline)** | ⚠️ Partial | Some tags, missing raw HTML rules |\n| **HTML (raw/disallowed)** | ❌ Not Implemented | No security filtering |\n| **Backslash Escapes** | ❌ Not Implemented | Missing entirely |\n| **Entities (full spec)** | ❌ Incomplete | ~30 entities vs. 5000+ required |\n| **Numeric References** | ❌ Not Implemented | Decimal and hex references missing |\n| **Hard Line Breaks** | ✅ Supported | Trailing spaces and backslash |\n| **Soft Line Breaks** | ❌ Not Implemented | Not handled |\n| **Strikethrough** | ✅ Supported | GFM extension works |\n| **Tables** | ✅ Supported | GFM extension works |\n| **Task Lists** | ⚠️ Partial | Basic syntax recognized |\n\n### MOST CRITICAL MISSING FEATURES (by spec compliance impact)\n\n1. **Indented code blocks** - Core GFM feature (section 4.4)\n2. **HTML blocks** - Core GFM feature (section 4.6) \n3. **Full emphasis parsing** - Core GFM feature (section 6.4)\n4. **Backslash escapes** - Core GFM feature (section 6.1)\n5. **HTML entity references** - Core GFM feature (section 6.2)\n6. **Extended autolinks** - GFM extension (section 6.9)\n\nThese gaps represent approximately **15-20% of GFM specification coverage** in terms of feature completeness, with the implementation successfully handling the most commonly used Markdown features but missing important edge cases and less common but still required features.'}, {'type': 'text', 'text': "agentId: a694b51 (for resuming to continue this agent's work if needed)"}]
[2026-01-24 12:40:38]
💭 Internal Reasoning (click to expand)
The agent provided a comprehensive analysis. Let me summarize the key unsupported features for the user in a clear, concise way.
[2026-01-24 12:40:45]
Based on the analysis of the codebase against the GFM spec, here are the unsupported features:
Block-level:
- Indented code blocks (4+ space indentation)
- HTML blocks (all 7 types:
<script>, comments, processing instructions, CDATA, etc.) - Soft line breaks (newline rendered as space)
Inline:
- Backslash escapes (
\!,\",\#, etc.) - Extended autolinks (
www.example.com, barehttp://URLs) - Email autolinks (
<[email protected]>) - Numeric character references (
#,{) - Disallowed raw HTML filtering (security)
Block-level:
- Lists - missing tight/loose distinction, multi-paragraph items, complex nesting
- Link reference definitions - single-line only, no multiline titles
Inline:
- Emphasis - basic
*bold*/_italic_works, but missing full left/right-flanking delimiter rules - Code spans - basic backticks work, missing proper N-backtick matching and space stripping rules
- HTML entities - ~30 supported vs 5000+ in spec
- Raw HTML - some inline tags work, missing full precedence rules
- ATX headings, Setext headings, thematic breaks
- Fenced code blocks, paragraphs, block quotes
- Basic links and images
- Hard line breaks (trailing spaces, backslash)
- Strikethrough (
~~text~~) - Tables with alignment
- Task list syntax (
- [ ],- [x])
The most impactful gaps are indented code blocks, HTML blocks, backslash escapes, and extended autolinks - these are commonly used in real-world markdown.
[2026-01-24 12:42:22]
let's implement indented code blocks
[2026-01-24 12:42:25]
💭 Internal Reasoning (click to expand)
The user wants to implement indented code blocks. This is a non-trivial feature that will require understanding the GFM spec and modifying the parser. Let me enter plan mode to properly design the implementation approach.
[2026-01-24 12:42:25]
🔧 Tool Use: EnterPlanMode (ID: toolu_018GydqhEWQGUywPGYfvrCz6)
{}[2026-01-24 12:42:25]
📊 Tool Result:
Entered plan mode. You should now focus on exploring the codebase and designing an implementation approach.
In plan mode, you should:
1. Thoroughly explore the codebase to understand existing patterns
2. Identify similar features and architectural approaches
3. Consider multiple approaches and their trade-offs
4. Use AskUserQuestion if you need to clarify the approach
5. Design a concrete implementation strategy
6. When ready, use ExitPlanMode to present your plan for approval
Remember: DO NOT write or edit any files yet. This is a read-only exploration and planning phase.
[2026-01-24 12:42:29]
💭 Internal Reasoning (click to expand)
I need to explore the codebase to understand:
1. The GFM spec for indented code blocks
2. How the current parser handles blocks (especially fenced code blocks as a reference)
3. The test fixtures and how they work
Let me launch explore agents to gather this information.
[2026-01-24 12:42:29]
I'll explore the codebase to understand how to implement indented code blocks.
[2026-01-24 12:42:32]
🔧 Tool Use: Task (ID: toolu_01TyvXN5yH47JarFufs2CQaZ)
{
"description": "Explore GFM indented code spec",
"prompt": "Read the GFM spec (gfmspec.md) section on indented code blocks (section 4.4). Extract:\n1. The exact rules for what constitutes an indented code block\n2. How they start and end\n3. Edge cases and examples\n4. How they interact with other block types (lists, paragraphs, etc.)\n\nProvide detailed findings with specific examples from the spec.",
"subagent_type": "Explore"
}[2026-01-24 12:42:34]
🔧 Tool Use: Task (ID: toolu_01A55qzBrPgNowZemeSGQVaC)
{
"description": "Explore current parser implementation",
"prompt": "Examine the current streaming parser implementation in src/lib.rs. Focus on:\n1. How the parser state machine works\n2. How fenced code blocks are currently implemented (as a reference)\n3. How block detection and emission works\n4. The overall architecture for adding a new block type\n\nProvide detailed findings with file paths and line numbers.",
"subagent_type": "Explore"
}[2026-01-24 12:42:57]
📊 Tool Result:
[{'type': 'text', 'text': 'Excellent! I have the complete section 4.4 on indented code blocks. Let me compile the detailed findings:\n\n## GFM Specification Section 4.4: Indented Code Blocks\n\n### 1. Exact Rules for What Constitutes an Indented Code Block\n\n**Core Definition:**\n- An indented code block is composed of one or more **indented chunks** separated by blank lines\n- An **indented chunk** is a sequence of non-blank lines, each indented **four or more spaces**\n- The contents are the literal contents of the lines (including trailing line endings), **minus four spaces of indentation**\n- An indented code block has **no info string** (unlike fenced code blocks)\n\n### 2. How They Start and End\n\n**Starting:**\n- A line indented with 4+ spaces begins an indented code block\n- Can start after any block-level element\n\n**Ending:**\n- Blank lines separate chunks but don\'t end the code block (they\'re preserved in the output)\n- The code block ends when a **non-blank line with fewer than four leading spaces** is encountered\n- Blank lines preceding or following an indented code block are **not included** in the block\n\n**Critical Constraint:**\n- **An indented code block cannot interrupt a paragraph** - there must be a blank line between a paragraph and a following indented code block\n- However, no blank line is needed between a code block and a following paragraph\n\n### 3. Edge Cases and Examples\n\n**Example 77 (Basic indented code block):**\n```\n a simple\n \n indented code block\n```\nOutput preserves the extra spaces beyond 4:\n```html\n<pre><code>a simple\n indented code block\n </code></pre>\n```\n\n**Example 78 & 79 (List precedence):**\nLists take precedence over indented code block interpretation. When indentation is ambiguous, list item interpretation wins:\n```\n-\n foo\n\n bar\n```\nThis creates a list item with two paragraphs (foo and bar), NOT a code block.\n\n**Example 80 (Literal text - no markdown parsing):**\n```\n <a/>\n \n *hi*\n\n \n - one\n```\nHTML, emphasis, and list syntax are all treated as literal text inside the code block.\n\n**Example 81 (Multiple chunks separated by blank lines):**\nThree chunks separated by blank lines are combined into one code block:\n```\n chunk1\n\n \n chunk2\n \n \n \n \n chunk3\n```\nOutput includes the blank lines:\n```html\n<pre><code>chunk1\n\nchunk2\n\n\n\nchunk3\n </code></pre>\n```\n\n**Example 82 (Interior blank lines preserve extra spaces):**\nAny spaces beyond the initial 4 are preserved, even on blank lines:\n```\n chunk1\n \n \n \n chunk2\n```\nThe interior blank line retains 2 extra spaces beyond the 4 removed.\n\n**Example 83 (Cannot interrupt paragraphs):**\n```\nFoo\n bar\n```\nThis becomes a single paragraph, not a code block, because the indented line follows the paragraph without a blank line separator.\n\n**Example 84 (Paragraph after code block):**\nA line with fewer than 4 spaces immediately ends the code block:\n```\n foo\nbar\n```\nOutput:\n```html\n<pre><code>foo\n</code></pre>\n<p>bar</p>\n```\n\n**Example 85 (Adjacent to other block types):**\nIndented code can occur before/after headings and other blocks without blank lines needed in one direction:\n```\n# Heading\n foo\nHeading\n------\n foo\n----\n```\nProduces heading, code block, heading, code block, horizontal rule.\n\n**Example 86 (First line indented more than 4 spaces):**\nExtra indentation on the first line is preserved:\n```\n foo\n bar\n```\nOutput has 1 space before "foo" (8 - 4 = 4 leading spaces including the preserved 1):\n```html\n<pre><code> foo\nbar\n </code></pre>\n```\n\n**Example 87 (Surrounding blank lines excluded):**\nBlank lines before and after a code block are not included:\n```\n \n foo\n \n```\nOutput contains only the "foo" line.\n\n**Example 88 (Trailing spaces preserved):**\n```\n foo \n```\nTrailing spaces are included in the code block\'s content.\n\n### 4. Interaction with Other Block Types\n\n**With Paragraphs:**\n- Indented code **cannot interrupt** a paragraph - requires a blank line before it\n- No blank line needed **after** a code block before a paragraph\n\n**With Lists:**\n- **List interpretation takes precedence** over code block interpretation when ambiguous\n- List items can contain indented text that would otherwise be code blocks\n\n**With Other Blocks (Headings, Thematic breaks):**\n- No blank line required between indented code and other block types\n- Can occur immediately before or after headings without blank line separation\n\n**With Blank Lines:**\n- Multiple blank lines between chunks are preserved as part of the code block content\n- Blank lines at the start and end of the block are stripped'}, {'type': 'text', 'text': "agentId: ae16081 (for resuming to continue this agent's work if needed)"}]
[2026-01-24 12:43:37]
📊 Tool Result:
[{'type': 'text', 'text': 'Perfect! Now I have a comprehensive view of the implementation. Let me create a detailed summary document.\n\n## Detailed Findings: Streaming Markdown Parser Architecture\n\nBased on my examination of `/Users/llimllib/code/mdriver/features/src/lib.rs`, here\'s a comprehensive analysis of the current streaming parser implementation:\n\n---\n\n### 1. CORE DATA STRUCTURES\n\n**StreamingParser (Lines 101-118)**\n```\npub struct StreamingParser {\n buffer: String, // Accumulates incomplete blocks\n state: ParserState, // Current parsing state\n current_block: BlockBuilder, // Builds block content incrementally\n syntax_set: SyntaxSet, // For syntax highlighting\n theme_set: &\'static EmbeddedLazyThemeSet,\n theme_name: String,\n image_protocol: ImageProtocol,\n width: usize,\n image_cache: HashMap<String, Vec<u8>>,\n link_definitions: HashMap<String, (String, Option<String>)>,\n pending_citations: RefCell<Vec<(usize, String, String)>>,\n next_citation_number: RefCell<usize>,\n}\n```\n\n**ParserState Enum (Lines 128-142)**\n- **Ready**: Not currently parsing any block\n- **InParagraph**: Accumulating paragraph lines (terminated by blank line)\n- **InCodeBlock**: Inside a fenced code block (with `info`, `fence` string, and `indent_offset`)\n- **InList**: Accumulating list items\n- **InListAfterBlank**: Special state for handling blank lines within lists\n- **InTable**: Building table rows\n- **InBlockquote**: Inside blockquote (tracks nesting level)\n\n**BlockBuilder Enum (Lines 144-167)**\nContains the accumulated content for each block type:\n- **Paragraph**: `Vec<String>` of lines\n- **CodeBlock**: `Vec<String>` of code lines plus language `info` string\n- **List**: `Vec<(usize, ListItemType, String)>` tuples (indentation level, type, raw content)\n- **Table**: Header cells, alignment info, and body rows\n- **Blockquote**: `Vec<(usize, String)>` tuples (nesting level, content)\n\n---\n\n### 2. STATE MACHINE FLOW\n\n**Main Entry Point: `pub fn feed(&mut self, chunk: &str) -> String` (Lines 346-362)**\n\n```\n1. Append chunk to internal buffer\n2. Loop while buffer contains complete lines (find \'\\n\'):\n - Extract line (including newline)\n - Call process_line()\n - Remove line from buffer\n3. Return accumulated output\n```\n\n**Line Processing: `fn process_line(&mut self, line: &str) -> Option<String>` (Lines 430-440)**\n\nDispatches based on current state:\n```rust\nmatch &self.state {\n ParserState::Ready => self.handle_ready_state(line),\n ParserState::InParagraph => self.handle_in_paragraph(line),\n ParserState::InCodeBlock { .. } => self.handle_in_code_block(line),\n ParserState::InList => self.handle_in_list(line),\n ParserState::InListAfterBlank => self.handle_in_list_after_blank(line),\n ParserState::InTable => self.handle_in_table(line),\n ParserState::InBlockquote { .. } => self.handle_in_blockquote(line),\n}\n```\n\n---\n\n### 3. DETAILED STATE HANDLERS\n\n#### **3.1 Ready State Handler: `fn handle_ready_state(&mut self, line: &str)` (Lines 442-520)**\n\nWhen a line arrives and parser is ready, checks in this order:\n1. **Blank line** (line 446) → Return None (no emission)\n2. **HTML comments** (line 452) → Silently skip\n3. **ATX headings** (line 457) → **Emit immediately** (headings complete on single line!)\n4. **Code fence** (line 464) → **Transition to InCodeBlock state**, return None\n5. **Blockquote** (line 478) → Transition to InBlockquote state\n6. **Horizontal rule** (line 490) → **Emit immediately**\n7. **List item** (line 495) → Transition to InList state\n8. **Link reference definition** (line 505) → Store in `link_definitions` HashMap, don\'t emit\n9. **Otherwise** → Transition to InParagraph state\n\n**Key Pattern**: Most blocks transition to a state and return None. Only "atomic" blocks (headings, rules) emit immediately.\n\n#### **3.2 Code Block Handler: `fn handle_in_code_block(&mut self, line: &str)` (Lines 566-599)**\n\n```\n1. Check if line is closing fence:\n - Must match exact fence string (``` or ~~~)\n - Can have 0-3 leading spaces (normal) or 4+ (inside list)\n - Line must be just the fence (possibly with trailing spaces)\n - YES → Emit entire block via emit_current_block()\n2. Otherwise:\n - Add line to BlockBuilder::CodeBlock.lines\n - Strip indent_offset spaces from beginning (for nested code blocks)\n - Return None (no emission yet)\n```\n\n**Code Fence Parsing: `fn parse_code_fence(&self, line: &str)` (Lines 888-909)**\n- Returns `Option<(String, String, usize)>` = (language info, fence string, leading spaces)\n- Only `\\`\\`\\`` or `~~~` recognized\n- 0-3 spaces of indentation allowed\n- Extracts language info from after fence\n\n#### **3.3 Paragraph Handler: `fn handle_in_paragraph(&mut self, line: &str)` (Lines 522-564)**\n\n```\n1. If blank line → Emit current block, return to Ready\n2. If setext underline (=== or ---) → Convert to heading, emit\n3. If table delimiter row → Promote paragraph to table, continue\n4. Otherwise → Append line to paragraph buffer\n```\n\n#### **3.4 List Handler: `fn handle_in_list(&mut self, line: &str)` (Lines 601-...)**\n\n- Blank line → Transition to InListAfterBlank\n- Horizontal rule → Emit list + rule\n- Another list item → Append to list buffer\n- Indented content (4+ spaces) → Check for code fence, otherwise append\n\n#### **3.5 Blockquote Handler**\n- Tracks nesting levels (number of `>` markers)\n- Can contain nested structures\n\n---\n\n### 4. BLOCK EMISSION\n\n**Primary Function: `fn emit_current_block(&mut self) -> Option<String>` (Lines 1106-1131)**\n\n```rust\n1. Extract block content via mem::replace() (moves BlockBuilder::current_block out)\n2. Reset state to Ready and current_block to None\n3. If images enabled: prefetch all image URLs in parallel\n4. Match on block type and call appropriate formatter:\n - BlockBuilder::Paragraph → format_paragraph()\n - BlockBuilder::CodeBlock → format_code_block()\n - BlockBuilder::List → format_list()\n - BlockBuilder::Table → format_table()\n - BlockBuilder::Blockquote → format_blockquote()\n```\n\n---\n\n### 5. FENCED CODE BLOCK IMPLEMENTATION (Reference for New Block Types)\n\n**Parsing (Lines 464-475 in handle_ready_state)**:\n```rust\nif let Some((info, fence, indent_offset)) = self.parse_code_fence(trimmed) {\n self.state = ParserState::InCodeBlock {\n info: info.clone(),\n fence: fence.clone(),\n indent_offset,\n };\n self.current_block = BlockBuilder::CodeBlock {\n lines: Vec::new(),\n info,\n };\n return None;\n}\n```\n\n**Accumulation (Lines 587-595 in handle_in_code_block)**:\n```rust\nif let BlockBuilder::CodeBlock { lines, .. } = &mut self.current_block {\n let line_to_add = if *indent_offset > 0 && trimmed.len() >= *indent_offset {\n &trimmed[*indent_offset..]\n } else {\n trimmed\n };\n lines.push(line_to_add.to_string());\n}\n```\n\n**Emission (Lines 1230-1280 - format_code_block)**:\n- Uses syntect for syntax highlighting\n- Applies 4-space indentation\n- Gets theme from two-face\n- Returns highlighted lines with ANSI codes\n\n---\n\n### 6. INLINE FORMATTING PIPELINE\n\n**Entry Point: `pub fn format_inline(&self, text: &str)` (Lines 2008+)**\n\nProcesses inline markdown in this order:\n1. `` images (line 2015)\n2. `[text](url)` links (line 2026)\n3. `[text][ref]` reference links (line 2043)\n4. `~~strikethrough~~` (line 2051)\n5. `**bold**` (line 2064)\n6. `*italic*` (line 2077)\n7. `` `code` `` (line 2090)\n8. `__bold__` underscore variant (line 2101)\n9. `_italic_` underscore variant (line 2114)\n10. `<html>` tags (line 2126)\n\nEach formatter:\n- Wraps with ANSI codes (e.g., `\\u{001b}[1m` for bold)\n- Recursively calls format_inline for nested content\n- Resets with `\\u{001b}[0m`\n\n---\n\n### 7. PARSING HELPER FUNCTIONS\n\n| Function | Purpose | Return Type | Lines |\n|----------|---------|-------------|-------|\n| `parse_atx_heading` | Detect `# Heading` | `Option<usize>` (level 1-6) | 790-805 |\n| `parse_setext_underline` | Detect `=====` or `-----` | `Option<usize>` (level 1-2) | 807-828 |\n| `parse_code_fence` | Detect `` ``` `` or `~~~` | `Option<(String, String, usize)>` | 888-909 |\n| `parse_list_item` | Detect `- ` or `1. ` | `Option<(usize, ListItemType)>` | 1015-1054 |\n| `parse_blockquote_marker` | Count `>` markers | `Option<usize>` | 1056-1084 |\n| `parse_link_definition` | Parse `[label]: url` | `Option<(String, String, Option<String>)>` | 926-1013 |\n| `parse_task_list_marker` | Detect `[ ]` or `[x]` | `Option<(bool, &str)>` | 1285-1308 |\n\n---\n\n### 8. FORMATTING FUNCTIONS\n\n| Function | Input | Output | Notes | Lines |\n|----------|-------|--------|-------|-------|\n| `format_heading` | level, text | `String` | Blue bold with `\\u{001b}[1;34m` + newlines | 1160-1174 |\n| `format_paragraph` | lines | `String` | Inline formatted, text-wrapped | 1182-1219 |\n| `format_code_block` | lines, language | `String` | Syntax highlighted with 4-space indent | 1230-1280 |\n| `format_list` | items | `String` | Nested bullets/numbers with wrapping | 1310-1377 |\n| `format_table` | header, alignments, rows | `String` | Formatted with column alignment | 1784-... |\n| `format_blockquote` | lines | `String` | Blockquote formatting | 1924-... |\n| `format_inline` | text | `String` | Apply bold, italic, code, links, etc. | 2008+... |\n\n---\n\n### 9. ARCHITECTURE PATTERNS FOR ADDING NEW BLOCK TYPES\n\nTo add a new block type (e.g., "Admonition" or "Details"):\n\n**Step 1: Add to ParserState enum (after line 142)**\n```rust\nInAdmonition {\n admonition_type: String, // e.g., "note", "warning"\n lines: Vec<String>,\n},\n```\n\n**Step 2: Add to BlockBuilder enum (after line 167)**\n```rust\nAdmonition {\n admonition_type: String,\n lines: Vec<String>,\n},\n```\n\n**Step 3: Add parser function (example at line 790+)**\n```rust\nfn parse_admonition_marker(&self, line: &str) -> Option<String> {\n // Return admonition type if detected\n}\n```\n\n**Step 4: Add handler in handle_ready_state (after line 442)**\n```rust\nif let Some(admonition_type) = self.parse_admonition_marker(trimmed) {\n self.state = ParserState::InAdmonition { admonition_type: admonition_type.clone() };\n self.current_block = BlockBuilder::Admonition {\n admonition_type,\n lines: Vec::new(),\n };\n return None;\n}\n```\n\n**Step 5: Add state handler (e.g., handle_in_admonition)**\n```rust\nfn handle_in_admonition(&mut self, line: &str) -> Option<String> {\n let trimmed = line.trim_end_matches(\'\\n\');\n \n // Blank line or block terminator -> emit\n if trimmed.is_empty() || /* other terminator */ {\n return self.emit_current_block();\n }\n \n // Accumulate\n if let BlockBuilder::Admonition { lines, .. } = &mut self.current_block {\n lines.push(trimmed.to_string());\n }\n None\n}\n```\n\n**Step 6: Add dispatch in process_line (after line 440)**\n```rust\nParserState::InAdmonition { .. } => self.handle_in_admonition(line),\n```\n\n**Step 7: Add formatter in emit_current_block (after line 1131)**\n```rust\nBlockBuilder::Admonition { admonition_type, lines } => \n Some(self.format_admonition(&admonition_type, &lines)),\n```\n\n**Step 8: Implement formatter function**\n```rust\nfn format_admonition(&self, admonition_type: &str, lines: &[String]) -> String {\n let styled_type = format!("\\u{001b}[1m{}\\u{001b}[0m", admonition_type);\n let content = self.format_inline(&lines.join(" "));\n format!(">>> {} {}\\n\\n", styled_type, content)\n}\n```\n\n---\n\n### 10. KEY STREAMING BEHAVIORS\n\n1. **Immediate Emission**: Atomic blocks (headings, rules) emit in `handle_ready_state` immediately\n2. **Buffering**: Multi-line blocks accumulate in `BlockBuilder` until completion signal\n3. **Completion Signals**:\n - Headings: After the `#` line itself (immediate)\n - Paragraphs: After blank line (`\\n\\n`)\n - Code blocks: After matching closing fence\n - Lists: After blank line or different block type\n - Blockquotes: After blank line or exited nesting\n\n4. **State Transitions**: Each handler can transition to a new state or emit and return to Ready\n\n5. **Partial Chunks**: The buffer accumulates until a complete line (`\\n` found), then processes\n\n---\n\n### 11. IMPORTANT IMPLEMENTATION DETAILS\n\n- **ANSI Codes**: All formatting uses `\\u{001b}` escape sequences (never `\\x1b`)\n- **Color Codes**:\n - Bold: `\\u{001b}[1m`\n - Italic: `\\u{001b}[3m`\n - Strikethrough: `\\u{001b}[9m`\n - Blue heading: `\\u{001b}[1;34m`\n - Code background: `\\u{001b}[48;5;235m`\n - Reset: `\\u{001b}[0m`\n\n- **Double Newlines**: Most block types end with `\\n\\n` for spacing\n\n- **Text Wrapping**: The `wrap_text` function handles line-wrapping with proper indentation for continuations\n\n- **Image Handling**: Code supports parallel prefetching via `prefetch_images()`, uses OSC 8 hyperlinks\n\n- **Link References**: Stored in `link_definitions` HashMap, rendered at flush time if citations are pending\n\n---\n\nThis architecture makes adding new block types straightforward: define state, builder, parser, handler, and formatter, then wire them together in the dispatch points.'}, {'type': 'text', 'text': "agentId: a69c8e4 (for resuming to continue this agent's work if needed)"}]
[2026-01-24 12:43:45]
💭 Internal Reasoning (click to expand)
Now I have comprehensive information about both:
1. The GFM spec for indented code blocks
2. The current parser architecture
Let me now design an implementation plan. Key points from my research:
**GFM Indented Code Block Rules:**
- 4+ spaces of indentation starts a code block
- Cannot interrupt a paragraph (needs blank line before)
- Ends when a non-blank line with <4 spaces is encountered
- Blank lines within the code block are preserved
- Content is the literal lines minus 4 spaces of indentation
- No info string (unlike fenced code blocks)
**Current Architecture:**
- State machine with ParserState enum and BlockBuilder enum
- `handle_ready_state` checks for block types in order
- Lists already handle indented content differently
- Need to add detection after other blocks but handle the "cannot interrupt paragraph" rule
**Implementation Challenges:**
1. Cannot interrupt paragraphs - need to track previous state or check differently
2. Lists take precedence over code blocks for indented content
3. Need to handle blank lines within code blocks (preserve them)
4. Need to strip exactly 4 spaces from each line
Let me write a plan for this implementation.
[2026-01-24 12:43:46]
Excellent. I now have a clear picture of both the GFM spec requirements and the parser architecture. Let me design the implementation plan.
[2026-01-24 12:44:11]
🔧 Tool Use: Write (ID: toolu_012jHoULqakHQ7RcoDAZsLvi)
{
"file_path": "/Users/llimllib/.claude/plans/wiggly-twirling-hopper.md",
"content": "# Plan: Implement Indented Code Blocks\n\n## Summary\n\nAdd support for GFM indented code blocks (4+ space indentation) to the streaming parser.\n\n## GFM Spec Requirements (Section 4.4)\n\n1. **Start**: Line indented with 4+ spaces (after a blank line or other non-paragraph block)\n2. **Content**: Literal text with 4 spaces stripped from each line\n3. **End**: Non-blank line with fewer than 4 leading spaces\n4. **Critical constraint**: Cannot interrupt a paragraph - requires blank line before\n5. **Blank lines**: Preserved within the code block (become part of content)\n6. **No info string**: Unlike fenced code blocks, no language specified\n\n## Files to Modify\n\n- `src/lib.rs` - Parser implementation (~10 changes)\n- `tests/fixtures/blocks/indented_code.toml` - New test file\n\n## Implementation Steps\n\n### 1. Add ParserState variant (~line 142)\n\n```rust\nInIndentedCodeBlock,\n```\n\nNo additional data needed - simpler than fenced code blocks.\n\n### 2. Add BlockBuilder variant (~line 167)\n\n```rust\nIndentedCodeBlock {\n lines: Vec<String>,\n},\n```\n\n### 3. Add helper function to detect indented code line\n\n```rust\nfn is_indented_code_line(&self, line: &str) -> Option<&str> {\n // Returns the content with 4 spaces stripped, or None if not indented enough\n if line.starts_with(\" \") {\n Some(&line[4..])\n } else if line.starts_with('\\t') {\n Some(&line[1..]) // Tab counts as 4 spaces\n } else {\n None\n }\n}\n```\n\n### 4. Modify `handle_ready_state` (~line 442)\n\nAdd detection for indented code blocks. **Important**: Must come AFTER list item detection (lists take precedence), and must NOT trigger after paragraphs without blank lines.\n\n```rust\n// After list item check, before falling through to paragraph\nif let Some(content) = self.is_indented_code_line(trimmed) {\n self.state = ParserState::InIndentedCodeBlock;\n self.current_block = BlockBuilder::IndentedCodeBlock {\n lines: vec![content.to_string()],\n };\n return None;\n}\n```\n\n### 5. Add state handler `handle_in_indented_code_block`\n\n```rust\nfn handle_in_indented_code_block(&mut self, line: &str) -> Option<String> {\n let trimmed = line.trim_end_matches('\\n');\n\n // Blank line - preserve it in the code block\n if trimmed.is_empty() || trimmed.chars().all(|c| c.is_whitespace()) {\n if let BlockBuilder::IndentedCodeBlock { lines } = &mut self.current_block {\n // Preserve blank line (strip 4 spaces if present)\n let content = self.is_indented_code_line(trimmed).unwrap_or(\"\");\n lines.push(content.to_string());\n }\n return None;\n }\n\n // Check if still indented (4+ spaces)\n if let Some(content) = self.is_indented_code_line(trimmed) {\n if let BlockBuilder::IndentedCodeBlock { lines } = &mut self.current_block {\n lines.push(content.to_string());\n }\n return None;\n }\n\n // Not indented anymore - emit block and process this line in ready state\n let output = self.emit_current_block();\n let next_output = self.handle_ready_state(line);\n\n match (output, next_output) {\n (Some(o1), Some(o2)) => Some(format!(\"{}{}\", o1, o2)),\n (Some(o), None) | (None, Some(o)) => Some(o),\n (None, None) => None,\n }\n}\n```\n\n### 6. Add dispatch in `process_line` (~line 440)\n\n```rust\nParserState::InIndentedCodeBlock => self.handle_in_indented_code_block(line),\n```\n\n### 7. Add formatting in `emit_current_block` (~line 1131)\n\n```rust\nBlockBuilder::IndentedCodeBlock { lines } => {\n // Strip trailing blank lines\n let mut lines = lines.clone();\n while lines.last().map_or(false, |l| l.is_empty()) {\n lines.pop();\n }\n Some(self.format_code_block(&lines, \"\")) // Empty string = no language\n}\n```\n\n### 8. Handle \"cannot interrupt paragraph\" rule\n\nIn `handle_in_paragraph`, indented lines should be treated as paragraph continuation, not code blocks. The current implementation already does this - indented lines without a blank line get appended to the paragraph.\n\n### 9. Handle interaction with lists\n\nLists already handle indented content specially. The key is that in `handle_ready_state`, we check for list items BEFORE checking for indented code blocks. This gives lists precedence.\n\n## Test Fixtures\n\nCreate `tests/fixtures/blocks/indented_code.toml`:\n\n```toml\nname = \"indented-code-basic\"\ndescription = \"Basic indented code block\"\n\n[[chunks]]\ninput = \" code line 1\\n\"\nemit = \"\"\n\n[[chunks]]\ninput = \" code line 2\\n\"\nemit = \"\"\n\n[[chunks]]\ninput = \"\\n\"\nemit = \"\"\n\n[[chunks]]\ninput = \"paragraph\\n\"\nemit = \" code line 1\\n code line 2\\n\\nparagraph\"\n```\n\n## Verification\n\n1. Run `cargo fmt`\n2. Run `cargo build` - no warnings\n3. Run `cargo clippy --all-targets --all-features -- -D warnings` - no errors\n4. Run `cargo test` - all tests pass\n5. Manual test: `echo \" hello\\n world\\n\\ndone\" | cargo run`\n\n## Edge Cases to Handle\n\n1. **Tab indentation**: Tab at start of line = 4 spaces\n2. **Extra indentation**: Lines with 5+ spaces keep the extra (only strip 4)\n3. **Blank lines in middle**: Preserved as empty lines in output\n4. **Trailing blank lines**: Should be stripped from output\n5. **Cannot interrupt paragraph**: Verified by existing paragraph handler\n"
}[2026-01-24 12:44:11]
📊 Tool Result:
File created successfully at: /Users/llimllib/.claude/plans/wiggly-twirling-hopper.md
[2026-01-24 12:44:14]
💭 Internal Reasoning (click to expand)
Let me read the existing lib.rs to verify a few details about the plan before finalizing. I want to make sure I understand the exact line numbers and patterns, and also check if there are any existing tests I should be aware of.
[2026-01-24 12:44:15]
Let me verify a few implementation details by reading the relevant sections of the code.
[2026-01-24 12:44:16]
🔧 Tool Use: Read (ID: toolu_01LBZhVhXV8GQAwFZQhCoqpy)
{
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"limit": 200
}[2026-01-24 12:44:16]
🔧 Tool Use: Glob (ID: toolu_01PyEoLbbjyQqdH5H73x8Sto)
{
"pattern": "tests/fixtures/blocks/*.toml"
}[2026-01-24 12:44:16]
📊 Tool Result:
1→use std::cell::RefCell;
2→use std::collections::HashMap;
3→use std::sync::LazyLock;
4→
5→use syntect::easy::HighlightLines;
6→use syntect::parsing::SyntaxSet;
7→use syntect::util::as_24_bit_terminal_escaped;
8→use two_face::theme::{EmbeddedLazyThemeSet, EmbeddedThemeName};
9→use unicode_width::UnicodeWidthStr;
10→
11→// Static theme set using two-face's extended themes
12→static THEME_SET: LazyLock<EmbeddedLazyThemeSet> = LazyLock::new(two_face::theme::extra);
13→
14→// HTML entity lookup table
15→static HTML_ENTITIES: LazyLock<HashMap<&'static str, char>> = LazyLock::new(|| {
16→ let mut m = HashMap::new();
17→ // Essential (XML) entities
18→ m.insert("amp", '&');
19→ m.insert("lt", '<');
20→ m.insert("gt", '>');
21→ m.insert("quot", '"');
22→ m.insert("apos", '\'');
23→ // Whitespace
24→ m.insert("nbsp", '\u{00A0}');
25→ // Typographic
26→ m.insert("ndash", '–');
27→ m.insert("mdash", '—');
28→ m.insert("hellip", '…');
29→ m.insert("lsquo", '\u{2018}'); // '
30→ m.insert("rsquo", '\u{2019}'); // '
31→ m.insert("ldquo", '\u{201C}'); // "
32→ m.insert("rdquo", '\u{201D}'); // "
33→ m.insert("bull", '•');
34→ m.insert("middot", '·');
35→ // Symbols
36→ m.insert("copy", '©');
37→ m.insert("reg", '®');
38→ m.insert("trade", '™');
39→ m.insert("deg", '°');
40→ m.insert("plusmn", '±');
41→ m.insert("times", '×');
42→ m.insert("divide", '÷');
43→ // Fractions
44→ m.insert("frac14", '¼');
45→ m.insert("frac12", '½');
46→ m.insert("frac34", '¾');
47→ // Currency
48→ m.insert("cent", '¢');
49→ m.insert("pound", '£');
50→ m.insert("euro", '€');
51→ m.insert("yen", '¥');
52→ // Arrows
53→ m.insert("larr", '←');
54→ m.insert("rarr", '→');
55→ m.insert("uarr", '↑');
56→ m.insert("darr", '↓');
57→ m
58→});
59→
60→/// Column alignment in tables
61→#[derive(Debug, Clone, Copy, PartialEq)]
62→enum Alignment {
63→ Left,
64→ Center,
65→ Right,
66→}
67→
68→/// List item type
69→#[derive(Debug, Clone, Copy, PartialEq)]
70→enum ListItemType {
71→ Unordered,
72→ Ordered,
73→}
74→
75→/// Callout type for GitHub-style alerts
76→#[derive(Debug, Clone, Copy, PartialEq)]
77→enum CalloutType {
78→ Note,
79→ Tip,
80→ Important,
81→ Warning,
82→ Caution,
83→}
84→
85→/// Image protocol for rendering images
86→#[derive(Debug, Clone, Copy, PartialEq)]
87→pub enum ImageProtocol {
88→ None,
89→ Kitty,
90→}
91→
92→/// Image data parsed from markdown
93→#[derive(Debug)]
94→struct ImageData {
95→ alt: String,
96→ src: String,
97→ end_pos: usize,
98→}
99→
100→/// Streaming markdown parser that emits formatted blocks incrementally
101→pub struct StreamingParser {
102→ buffer: String,
103→ state: ParserState,
104→ current_block: BlockBuilder,
105→ syntax_set: SyntaxSet,
106→ theme_set: &'static EmbeddedLazyThemeSet,
107→ theme_name: String,
108→ image_protocol: ImageProtocol,
109→ width: usize,
110→ /// Cache for prefetched image data (URL -> image bytes)
111→ image_cache: HashMap<String, Vec<u8>>,
112→ /// Link reference definitions: normalized_label -> (url, optional_title)
113→ link_definitions: HashMap<String, (String, Option<String>)>,
114→ /// Pending citations for bibliography: (citation_number, label, display_text)
115→ pending_citations: RefCell<Vec<(usize, String, String)>>,
116→ /// Next citation number to assign
117→ next_citation_number: RefCell<usize>,
118→}
119→
120→/// Calculate the default output width: min(terminal_width, 80)
121→fn default_width() -> usize {
122→ term_size::dimensions()
123→ .map(|(w, _)| w.min(80))
124→ .unwrap_or(80)
125→}
126→
127→#[derive(Debug, Clone, PartialEq)]
128→enum ParserState {
129→ Ready,
130→ InParagraph,
131→ InCodeBlock {
132→ info: String,
133→ fence: String,
134→ indent_offset: usize,
135→ },
136→ InList,
137→ InListAfterBlank, // In a list but just saw a blank line
138→ InTable,
139→ InBlockquote {
140→ nesting_level: usize,
141→ },
142→}
143→
144→#[derive(Debug, Clone)]
145→enum BlockBuilder {
146→ None,
147→ Paragraph {
148→ lines: Vec<String>,
149→ },
150→ CodeBlock {
151→ lines: Vec<String>,
152→ #[allow(dead_code)]
153→ info: String, // Language info for future syntax highlighting
154→ },
155→
... (truncated, 1798 chars omitted)
[2026-01-24 12:44:16]
📊 Tool Result:
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/blockquote_basic.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/blockquote_dynamic_nesting.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/blockquote_inline_formatting.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/blockquote_lazy.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/blockquote_nested.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/callout_all_types.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/callout_note.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/code_block.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/code_fence_in_list.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/code_fence_indented.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/heading.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/heading_inline_formatting.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/heading_setext_level1.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/heading_setext_level2.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/heading_setext_multiline.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/horizontal_rule_asterisks.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/horizontal_rule_basic.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/horizontal_rule_in_list.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/horizontal_rule_spaces.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/list.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/list_mixed.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/list_nested.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/list_ordered.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/paragraph.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/paragraph_hard_break.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/paragraph_hard_break_backslash.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/table_alignment.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/table_basic.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/table_inline_formatting.toml
[2026-01-24 12:44:20]
💭 Internal Reasoning (click to expand)
Good, I can see the ParserState and BlockBuilder enums. Let me also look at the handle_ready_state function to understand the exact ordering of checks, and check how the existing code_block.toml test is structured to understand the test format better.
[2026-01-24 12:44:21]
🔧 Tool Use: Read (ID: toolu_01VFJ47SS4UQu6stEyA1ceoJ)
{
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"offset": 440,
"limit": 100
}[2026-01-24 12:44:21]
🔧 Tool Use: Read (ID: toolu_01Vah9DCv375qUV2xtdhFUqR)
{
"file_path": "/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/code_block.toml"
}[2026-01-24 12:44:21]
📊 Tool Result:
440→ }
441→
442→ fn handle_ready_state(&mut self, line: &str) -> Option<String> {
443→ let trimmed = line.trim_end_matches('\n');
444→
445→ // Check for blank line
446→ if trimmed.is_empty() {
447→ return None;
448→ }
449→
450→ // Check for HTML comment line (<!-- ... -->)
451→ // These should be silently skipped
452→ if self.is_html_comment_line(trimmed) {
453→ return None;
454→ }
455→
456→ // Check for ATX heading (# )
457→ if let Some(level) = self.parse_atx_heading(trimmed) {
458→ let text = trimmed[level..].trim_start().to_string();
459→ // Headings complete on the same line - emit immediately
460→ return Some(self.format_heading(level, &text));
461→ }
462→
463→ // Check for code fence (```)
464→ if let Some((info, fence, indent_offset)) = self.parse_code_fence(trimmed) {
465→ self.state = ParserState::InCodeBlock {
466→ info: info.clone(),
467→ fence: fence.clone(),
468→ indent_offset,
469→ };
470→ self.current_block = BlockBuilder::CodeBlock {
471→ lines: Vec::new(),
472→ info,
473→ };
474→ return None;
475→ }
476→
477→ // Check for blockquote
478→ if let Some(nesting_level) = self.parse_blockquote_marker(trimmed) {
479→ let content = self.strip_blockquote_markers(trimmed, nesting_level);
480→ self.state = ParserState::InBlockquote { nesting_level };
481→ self.current_block = BlockBuilder::Blockquote {
482→ lines: vec![(nesting_level, content)],
483→ current_nesting: nesting_level,
484→ };
485→ return None;
486→ }
487→
488→ // Check for horizontal rule (thematic break)
489→ // Must be checked before list items per GFM spec
490→ if self.is_horizontal_rule(trimmed) {
491→ return Some(self.format_horizontal_rule());
492→ }
493→
494→ // Check for list item (- or digit.)
495→ if let Some((indent, item_type)) = self.parse_list_item(trimmed) {
496→ self.state = ParserState::InList;
497→ self.current_block = BlockBuilder::List {
498→ items: vec![(indent, item_type, trimmed.to_string())],
499→ };
500→ return None;
501→ }
502→
503→ // Check for link reference definition [label]: url "title"
504→ // These are stored but never emit content
505→ if let Some((label, url, title)) = self.parse_link_definition(trimmed) {
506→ let normalized_label = self.normalize_link_label(&label);
507→ // First definition wins (don't overwrite)
508→ self.link_definitions
509→ .entry(normalized_label)
510→ .or_insert((url, title));
511→ return None;
512→ }
513→
514→ // Otherwise, start a paragraph
515→ self.state = ParserState::InParagraph;
516→ self.current_block = BlockBuilder::Paragraph {
517→ lines: vec![trimmed.to_string()],
518→ };
519→ None
520→ }
521→
522→ fn handle_in_paragraph(&mut self, line: &str) -> Option<String> {
523→ let trimmed = line.trim_end_matches('\n');
524→
525→ // Blank line completes paragraph
526→ if trimmed.is_empty() {
527→ return self.emit_current_block();
528→ }
529→
530→ // Check if this is a setext heading underline
531→ if let Some(level) = self.parse_setext_underline(trimmed) {
532→ if let BlockBuilder::Paragraph { lines } = &self.current_block {
533→ // Join all lines to form the heading text
534→ let text = lines.join(" ");
535→ self.state = ParserState::Ready;
536→ self.current_block = BlockBuilder::None;
537→ return Some(self.format_heading(level, &text));
538→ }
539→ }
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>
[2026-01-24 12:44:21]
📊 Tool Result:
1→name = "code-block-basic"
2→description = "Code block should accumulate and emit only after closing fence"
3→
4→[[chunks]]
5→input = "```"
6→emit = ""
7→
8→[[chunks]]
9→input = "rust"
10→emit = ""
11→
12→[[chunks]]
13→input = "\n"
14→emit = ""
15→
16→[[chunks]]
17→input = "fn main() {\n"
18→emit = ""
19→
20→[[chunks]]
21→input = " println!(\"Hello\");\n"
22→emit = ""
23→
24→[[chunks]]
25→input = "}\n"
26→emit = ""
27→
28→[[chunks]]
29→input = "```\n"
30→emit = " \u001b[38;2;180;142;173mfn\u001b[38;2;192;197;206m \u001b[38;2;143;161;179mmain\u001b[38;2;192;197;206m(\u001b[38;2;192;197;206m)\u001b[38;2;192;197;206m \u001b[38;2;192;197;206m{\u001b[38;2;192;197;206m\n \u001b[38;2;192;197;206m \u001b[38;2;192;197;206mprintln!\u001b[38;2;192;197;206m(\u001b[38;2;192;197;206m\"\u001b[38;2;163;190;140mHello\u001b[38;2;192;197;206m\"\u001b[38;2;192;197;206m)\u001b[38;2;192;197;206m;\u001b[38;2;192;197;206m\n \u001b[38;2;192;197;206m}\u001b[38;2;192;197;206m\n\u001b[0m\n"
31→
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>
[2026-01-24 12:44:28]
💭 Internal Reasoning (click to expand)
Now I understand the current structure better. The key observations:
1. In `handle_ready_state`, the order of checks is:
- Blank line
- HTML comment
- ATX heading
- Code fence
- Blockquote
- Horizontal rule
- List item
- Link reference definition
- Otherwise → paragraph
2. For indented code blocks, I need to add the check AFTER list items but BEFORE falling through to paragraph. The reason is that lists take precedence over indented code blocks per the GFM spec.
3. The test format expects syntax-highlighted output for code blocks. But indented code blocks don't have a language, so they won't be syntax highlighted - they'll just be plain text with 4-space indentation.
4. Important: The code block test shows that the output is prefixed with 4 spaces for display indentation. Looking at `format_code_block`, it adds 4-space indentation. We should reuse this for indented code blocks.
Let me check the `format_code_block` function to see how it handles no language:
[2026-01-24 12:44:29]
🔧 Tool Use: Grep (ID: toolu_011SxxrzrXzPVd6psDtMNcfP)
{
"pattern": "fn format_code_block",
"path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"output_mode": "content",
"-A": 50
}[2026-01-24 12:44:29]
📊 Tool Result:
1230: fn format_code_block(&self, lines: &[String], info: &str) -> String {
1231- let mut output = String::new();
1232-
1233- // Map common aliases to their syntect language names
1234- let language = match info.to_lowercase().as_str() {
1235- "jsx" => "javascript",
1236- "tsx" => "typescript",
1237- _ => info,
1238- };
1239-
1240- // Try to find syntax definition for the language
1241- let syntax = self
1242- .syntax_set
1243- .find_syntax_by_token(language)
1244- .unwrap_or_else(|| self.syntax_set.find_syntax_plain_text());
1245-
1246- // Get theme from two-face's embedded themes, with fallback
1247- let theme = Self::theme_name_to_enum(&self.theme_name)
1248- .map(|name| self.theme_set.get(name))
1249- .unwrap_or_else(|| self.theme_set.get(EmbeddedThemeName::Base16OceanDark));
1250-
1251- let mut highlighter = HighlightLines::new(syntax, theme);
1252-
1253- // Process lines and collect highlighted output
1254- let mut highlighted_lines = Vec::new();
1255- for line in lines {
1256- // Add newline for proper syntax highlighting state management
1257- let line_with_newline = format!("{}\n", line);
1258- let ranges = highlighter
1259- .highlight_line(&line_with_newline, &self.syntax_set)
1260- .unwrap_or_default();
1261- let highlighted = as_24_bit_terminal_escaped(&ranges[..], false);
1262- // Remove the trailing newline from highlighted output
1263- let highlighted = highlighted.trim_end_matches('\n').to_string();
1264- highlighted_lines.push(highlighted);
1265- }
1266-
1267- / Each line: 4 space indent + highlighted content (no background)
1268- for highlighted in highlighted_lines.iter() {
1269- output.push_str(" ");
1270- output.push_str(highlighted);
1271- output.push('\n');
1272- }
1273-
1274- // Reset ANSI codes to prevent color bleeding
1275- output.push_str("\u{001b}[0m");
1276-
1277- // Add blank line after code block for spacing
1278- output.push('\n');
1279- output
1280- }
[2026-01-24 12:44:33]
💭 Internal Reasoning (click to expand)
The `format_code_block` function already handles the case where no language is provided - it falls back to plain text syntax. This means I can reuse this function for indented code blocks by passing an empty string for the info.
Now let me update my plan with more accurate details and then exit plan mode.
[2026-01-24 12:44:33]
The format_code_block function already handles empty language info by falling back to plain text. Let me update the plan with final details.
[2026-01-24 12:45:09]
🔧 Tool Use: Edit (ID: toolu_014iiYtbsJdLKHM7ZC8vyFkE)
{
"replace_all": false,
"file_path": "/Users/llimllib/.claude/plans/wiggly-twirling-hopper.md",
"old_string": "# Plan: Implement Indented Code Blocks\n\n## Summary\n\nAdd support for GFM indented code blocks (4+ space indentation) to the streaming parser.\n\n## GFM Spec Requirements (Section 4.4)\n\n1. **Start**: Line indented with 4+ spaces (after a blank line or other non-paragraph block)\n2. **Content**: Literal text with 4 spaces stripped from each line\n3. **End**: Non-blank line with fewer than 4 leading spaces\n4. **Critical constraint**: Cannot interrupt a paragraph - requires blank line before\n5. **Blank lines**: Preserved within the code block (become part of content)\n6. **No info string**: Unlike fenced code blocks, no language specified\n\n## Files to Modify\n\n- `src/lib.rs` - Parser implementation (~10 changes)\n- `tests/fixtures/blocks/indented_code.toml` - New test file\n\n## Implementation Steps\n\n### 1. Add ParserState variant (~line 142)\n\n```rust\nInIndentedCodeBlock,\n```\n\nNo additional data needed - simpler than fenced code blocks.\n\n### 2. Add BlockBuilder variant (~line 167)\n\n```rust\nIndentedCodeBlock {\n lines: Vec<String>,\n},\n```\n\n### 3. Add helper function to detect indented code line\n\n```rust\nfn is_indented_code_line(&self, line: &str) -> Option<&str> {\n // Returns the content with 4 spaces stripped, or None if not indented enough\n if line.starts_with(\" \") {\n Some(&line[4..])\n } else if line.starts_with('\\t') {\n Some(&line[1..]) // Tab counts as 4 spaces\n } else {\n None\n }\n}\n```\n\n### 4. Modify `handle_ready_state` (~line 442)\n\nAdd detection for indented code blocks. **Important**: Must come AFTER list item detection (lists take precedence), and must NOT trigger after paragraphs without blank lines.\n\n```rust\n// After list item check, before falling through to paragraph\nif let Some(content) = self.is_indented_code_line(trimmed) {\n self.state = ParserState::InIndentedCodeBlock;\n self.current_block = BlockBuilder::IndentedCodeBlock {\n lines: vec![content.to_string()],\n };\n return None;\n}\n```\n\n### 5. Add state handler `handle_in_indented_code_block`\n\n```rust\nfn handle_in_indented_code_block(&mut self, line: &str) -> Option<String> {\n let trimmed = line.trim_end_matches('\\n');\n\n // Blank line - preserve it in the code block\n if trimmed.is_empty() || trimmed.chars().all(|c| c.is_whitespace()) {\n if let BlockBuilder::IndentedCodeBlock { lines } = &mut self.current_block {\n // Preserve blank line (strip 4 spaces if present)\n let content = self.is_indented_code_line(trimmed).unwrap_or(\"\");\n lines.push(content.to_string());\n }\n return None;\n }\n\n // Check if still indented (4+ spaces)\n if let Some(content) = self.is_indented_code_line(trimmed) {\n if let BlockBuilder::IndentedCodeBlock { lines } = &mut self.current_block {\n lines.push(content.to_string());\n }\n return None;\n }\n\n // Not indented anymore - emit block and process this line in ready state\n let output = self.emit_current_block();\n let next_output = self.handle_ready_state(line);\n\n match (output, next_output) {\n (Some(o1), Some(o2)) => Some(format!(\"{}{}\", o1, o2)),\n (Some(o), None) | (None, Some(o)) => Some(o),\n (None, None) => None,\n }\n}\n```\n\n### 6. Add dispatch in `process_line` (~line 440)\n\n```rust\nParserState::InIndentedCodeBlock => self.handle_in_indented_code_block(line),\n```\n\n### 7. Add formatting in `emit_current_block` (~line 1131)\n\n```rust\nBlockBuilder::IndentedCodeBlock { lines } => {\n // Strip trailing blank lines\n let mut lines = lines.clone();\n while lines.last().map_or(false, |l| l.is_empty()) {\n lines.pop();\n }\n Some(self.format_code_block(&lines, \"\")) // Empty string = no language\n}\n```\n\n### 8. Handle \"cannot interrupt paragraph\" rule\n\nIn `handle_in_paragraph`, indented lines should be treated as paragraph continuation, not code blocks. The current implementation already does this - indented lines without a blank line get appended to the paragraph.\n\n### 9. Handle interaction with lists\n\nLists already handle indented content specially. The key is that in `handle_ready_state`, we check for list items BEFORE checking for indented code blocks. This gives lists precedence.\n\n## Test Fixtures\n\nCreate `tests/fixtures/blocks/indented_code.toml`:\n\n```toml\nname = \"indented-code-basic\"\ndescription = \"Basic indented code block\"\n\n[[chunks]]\ninput = \" code line 1\\n\"\nemit = \"\"\n\n[[chunks]]\ninput = \" code line 2\\n\"\nemit = \"\"\n\n[[chunks]]\ninput = \"\\n\"\nemit = \"\"\n\n[[chunks]]\ninput = \"paragraph\\n\"\nemit = \" code line 1\\n code line 2\\n\\nparagraph\"\n```\n\n## Verification\n\n1. Run `cargo fmt`\n2. Run `cargo build` - no warnings\n3. Run `cargo clippy --all-targets --all-features -- -D warnings` - no errors\n4. Run `cargo test` - all tests pass\n5. Manual test: `echo \" hello\\n world\\n\\ndone\" | cargo run`\n\n## Edge Cases to Handle\n\n1. **Tab indentation**: Tab at start of line = 4 spaces\n2. **Extra indentation**: Lines with 5+ spaces keep the extra (only strip 4)\n3. **Blank lines in middle**: Preserved as empty lines in output\n4. **Trailing blank lines**: Should be stripped from output\n5. **Cannot interrupt paragraph**: Verified by existing paragraph handler",
"new_string": "# Plan: Implement Indented Code Blocks\n\n## Summary\n\nAdd support for GFM indented code blocks (4+ space indentation) to the streaming parser.\n\n## GFM Spec Requirements (Section 4.4)\n\n1. **Start**: Line indented with 4+ spaces (after a blank line or other non-paragraph block)\n2. **Content**: Literal text with 4 spaces stripped from each line\n3. **End**: Non-blank line with fewer than 4 leading spaces\n4. **Critical constraint**: Cannot interrupt a paragraph - requires blank line before\n5. **Blank lines**: Preserved within the code block (become part of content)\n6. **No info string**: Unlike fenced code blocks, no language specified\n\n## Files to Modify\n\n- `src/lib.rs` - Parser implementation\n- `tests/fixtures/blocks/indented_code.toml` - New test file\n\n## Implementation Steps\n\n### 1. Add ParserState variant (after line 142)\n\n```rust\nInIndentedCodeBlock,\n```\n\n### 2. Add BlockBuilder variant (after line 167)\n\n```rust\nIndentedCodeBlock {\n lines: Vec<String>,\n},\n```\n\n### 3. Add helper function to detect indented code line\n\n```rust\nfn is_indented_code_line<'a>(&self, line: &'a str) -> Option<&'a str> {\n if line.starts_with(\" \") {\n Some(&line[4..])\n } else if line.starts_with('\\t') {\n Some(&line[1..])\n } else {\n None\n }\n}\n```\n\n### 4. Modify `handle_ready_state` (line 512, after link definition check)\n\nAdd detection AFTER link definitions, BEFORE falling through to paragraph:\n\n```rust\n// Check for indented code block (4+ spaces)\n// Must come after list check (lists take precedence)\nif let Some(content) = self.is_indented_code_line(trimmed) {\n self.state = ParserState::InIndentedCodeBlock;\n self.current_block = BlockBuilder::IndentedCodeBlock {\n lines: vec![content.to_string()],\n };\n return None;\n}\n```\n\n### 5. Add dispatch in `process_line` (around line 435)\n\n```rust\nParserState::InIndentedCodeBlock => self.handle_in_indented_code_block(line),\n```\n\n### 6. Add state handler `handle_in_indented_code_block`\n\n```rust\nfn handle_in_indented_code_block(&mut self, line: &str) -> Option<String> {\n let trimmed = line.trim_end_matches('\\n');\n\n // Blank line - preserve in code block\n if trimmed.is_empty() {\n if let BlockBuilder::IndentedCodeBlock { lines } = &mut self.current_block {\n lines.push(String::new());\n }\n return None;\n }\n\n // Still indented? Continue accumulating\n if let Some(content) = self.is_indented_code_line(trimmed) {\n if let BlockBuilder::IndentedCodeBlock { lines } = &mut self.current_block {\n lines.push(content.to_string());\n }\n return None;\n }\n\n // Not indented - emit block and process line in ready state\n let output = self.emit_current_block();\n let next_output = self.handle_ready_state(line);\n\n match (output, next_output) {\n (Some(o1), Some(o2)) => Some(format!(\"{}{}\", o1, o2)),\n (Some(o), None) | (None, Some(o)) => Some(o),\n (None, None) => None,\n }\n}\n```\n\n### 7. Add formatting in `emit_current_block` (around line 1106)\n\n```rust\nBlockBuilder::IndentedCodeBlock { lines } => {\n let mut lines = lines.clone();\n // Strip trailing blank lines\n while lines.last().map_or(false, |l| l.is_empty()) {\n lines.pop();\n }\n Some(self.format_code_block(&lines, \"\"))\n}\n```\n\nNote: `format_code_block` already handles empty language by using plain text syntax.\n\n## Test File\n\nCreate `tests/fixtures/blocks/indented_code.toml` with tests for:\n- Basic indented code block\n- Blank lines preserved within code block\n- Trailing blank lines stripped\n- Extra indentation preserved (5+ spaces keeps 1+)\n- Tab indentation\n\n## Verification\n\n```bash\ncargo fmt\ncargo build\ncargo clippy --all-targets --all-features -- -D warnings\ncargo test\n```\n\nManual test:\n```bash\nprintf \" line1\\n line2\\n\\ndone\\n\" | cargo run\n```"
}[2026-01-24 12:45:09]
📊 Tool Result:
The file /Users/llimllib/.claude/plans/wiggly-twirling-hopper.md has been updated successfully.
[2026-01-24 12:45:12]
💭 Internal Reasoning (click to expand)
The plan is complete. Let me exit plan mode so the user can review and approve it.
[2026-01-24 12:45:14]
The plan is ready. The implementation involves:
- Adding a new
InIndentedCodeBlockparser state andIndentedCodeBlockblock builder - A helper function to detect 4+ space indentation and strip it
- Inserting detection in
handle_ready_stateafter list items (lists take precedence per GFM spec) - A state handler that accumulates lines until a non-indented line is encountered
- Reusing
format_code_blockwith empty language for output formatting - Test fixtures covering basic cases and edge cases
[2026-01-24 12:45:14]
🔧 Tool Use: ExitPlanMode (ID: toolu_019UoDSG7gS1VQ7JKp1jd7wc)
{
"plan": "# Plan: Implement Indented Code Blocks\n\n## Summary\n\nAdd support for GFM indented code blocks (4+ space indentation) to the streaming parser.\n\n## GFM Spec Requirements (Section 4.4)\n\n1. **Start**: Line indented with 4+ spaces (after a blank line or other non-paragraph block)\n2. **Content**: Literal text with 4 spaces stripped from each line\n3. **End**: Non-blank line with fewer than 4 leading spaces\n4. **Critical constraint**: Cannot interrupt a paragraph - requires blank line before\n5. **Blank lines**: Preserved within the code block (become part of content)\n6. **No info string**: Unlike fenced code blocks, no language specified\n\n## Files to Modify\n\n- `src/lib.rs` - Parser implementation\n- `tests/fixtures/blocks/indented_code.toml` - New test file\n\n## Implementation Steps\n\n### 1. Add ParserState variant (after line 142)\n\n```rust\nInIndentedCodeBlock,\n```\n\n### 2. Add BlockBuilder variant (after line 167)\n\n```rust\nIndentedCodeBlock {\n lines: Vec<String>,\n},\n```\n\n### 3. Add helper function to detect indented code line\n\n```rust\nfn is_indented_code_line<'a>(&self, line: &'a str) -> Option<&'a str> {\n if line.starts_with(\" \") {\n Some(&line[4..])\n } else if line.starts_with('\\t') {\n Some(&line[1..])\n } else {\n None\n }\n}\n```\n\n### 4. Modify `handle_ready_state` (line 512, after link definition check)\n\nAdd detection AFTER link definitions, BEFORE falling through to paragraph:\n\n```rust\n// Check for indented code block (4+ spaces)\n// Must come after list check (lists take precedence)\nif let Some(content) = self.is_indented_code_line(trimmed) {\n self.state = ParserState::InIndentedCodeBlock;\n self.current_block = BlockBuilder::IndentedCodeBlock {\n lines: vec![content.to_string()],\n };\n return None;\n}\n```\n\n### 5. Add dispatch in `process_line` (around line 435)\n\n```rust\nParserState::InIndentedCodeBlock => self.handle_in_indented_code_block(line),\n```\n\n### 6. Add state handler `handle_in_indented_code_block`\n\n```rust\nfn handle_in_indented_code_block(&mut self, line: &str) -> Option<String> {\n let trimmed = line.trim_end_matches('\\n');\n\n // Blank line - preserve in code block\n if trimmed.is_empty() {\n if let BlockBuilder::IndentedCodeBlock { lines } = &mut self.current_block {\n lines.push(String::new());\n }\n return None;\n }\n\n // Still indented? Continue accumulating\n if let Some(content) = self.is_indented_code_line(trimmed) {\n if let BlockBuilder::IndentedCodeBlock { lines } = &mut self.current_block {\n lines.push(content.to_string());\n }\n return None;\n }\n\n // Not indented - emit block and process line in ready state\n let output = self.emit_current_block();\n let next_output = self.handle_ready_state(line);\n\n match (output, next_output) {\n (Some(o1), Some(o2)) => Some(format!(\"{}{}\", o1, o2)),\n (Some(o), None) | (None, Some(o)) => Some(o),\n (None, None) => None,\n }\n}\n```\n\n### 7. Add formatting in `emit_current_block` (around line 1106)\n\n```rust\nBlockBuilder::IndentedCodeBlock { lines } => {\n let mut lines = lines.clone();\n // Strip trailing blank lines\n while lines.last().map_or(false, |l| l.is_empty()) {\n lines.pop();\n }\n Some(self.format_code_block(&lines, \"\"))\n}\n```\n\nNote: `format_code_block` already handles empty language by using plain text syntax.\n\n## Test File\n\nCreate `tests/fixtures/blocks/indented_code.toml` with tests for:\n- Basic indented code block\n- Blank lines preserved within code block\n- Trailing blank lines stripped\n- Extra indentation preserved (5+ spaces keeps 1+)\n- Tab indentation\n\n## Verification\n\n```bash\ncargo fmt\ncargo build\ncargo clippy --all-targets --all-features -- -D warnings\ncargo test\n```\n\nManual test:\n```bash\nprintf \" line1\\n line2\\n\\ndone\\n\" | cargo run\n```\n"
}[2026-01-24 12:47:39]
📊 Tool Result:
The user doesn't want to proceed with this tool use. The tool use was rejected (eg. if it was a file edit, the new_string was NOT written to the file). STOP what you are doing and wait for the user to tell you how to proceed.
[2026-01-24 12:47:39]
[Request interrupted by user for tool use]
[2026-01-24 12:47:39]
Implement the following plan:
Add support for GFM indented code blocks (4+ space indentation) to the streaming parser.
- Start: Line indented with 4+ spaces (after a blank line or other non-paragraph block)
- Content: Literal text with 4 spaces stripped from each line
- End: Non-blank line with fewer than 4 leading spaces
- Critical constraint: Cannot interrupt a paragraph - requires blank line before
- Blank lines: Preserved within the code block (become part of content)
- No info string: Unlike fenced code blocks, no language specified
src/lib.rs- Parser implementationtests/fixtures/blocks/indented_code.toml- New test file
InIndentedCodeBlock,IndentedCodeBlock {
lines: Vec<String>,
},fn is_indented_code_line<'a>(&self, line: &'a str) -> Option<&'a str> {
if line.starts_with(" ") {
Some(&line[4..])
} else if line.starts_with('\t') {
Some(&line[1..])
} else {
None
}
}Add detection AFTER link definitions, BEFORE falling through to paragraph:
// Check for indented code block (4+ spaces)
// Must come after list check (lists take precedence)
if let Some(content) = self.is_indented_code_line(trimmed) {
self.state = ParserState::InIndentedCodeBlock;
self.current_block = BlockBuilder::IndentedCodeBlock {
lines: vec![content.to_string()],
};
return None;
}ParserState::InIndentedCodeBlock => self.handle_in_indented_code_block(line),fn handle_in_indented_code_block(&mut self, line: &str) -> Option<String> {
let trimmed = line.trim_end_matches('\n');
// Blank line - preserve in code block
if trimmed.is_empty() {
if let BlockBuilder::IndentedCodeBlock { lines } = &mut self.current_block {
lines.push(String::new());
}
return None;
}
// Still indented? Continue accumulating
if let Some(content) = self.is_indented_code_line(trimmed) {
if let BlockBuilder::IndentedCodeBlock { lines } = &mut self.current_block {
lines.push(content.to_string());
}
return None;
}
// Not indented - emit block and process line in ready state
let output = self.emit_current_block();
let next_output = self.handle_ready_state(line);
match (output, next_output) {
(Some(o1), Some(o2)) => Some(format!("{}{}", o1, o2)),
(Some(o), None) | (None, Some(o)) => Some(o),
(None, None) => None,
}
}BlockBuilder::IndentedCodeBlock { lines } => {
let mut lines = lines.clone();
// Strip trailing blank lines
while lines.last().map_or(false, |l| l.is_empty()) {
lines.pop();
}
Some(self.format_code_block(&lines, ""))
}Note: format_code_block already handles empty language by using plain text syntax.
Create tests/fixtures/blocks/indented_code.toml with tests for:
- Basic indented code block
- Blank lines preserved within code block
- Trailing blank lines stripped
- Extra indentation preserved (5+ spaces keeps 1+)
- Tab indentation
cargo fmt
cargo build
cargo clippy --all-targets --all-features -- -D warnings
cargo testManual test:
printf " line1\n line2\n\ndone\n" | cargo runIf you need specific details from before exiting plan mode (like exact code snippets, error messages, or content you generated), read the full transcript at: /Users/llimllib/.claude/projects/-Users-llimllib-code-mdriver-features/73b270af-910b-476e-8b81-eecf0d5b4fd7.jsonl
[2026-01-24 12:47:43]
💭 Internal Reasoning (click to expand)
The user wants me to implement indented code blocks according to the plan they've provided. Let me start by reading the relevant files to understand the current state of the codebase, then implement the changes step by step.
Let me first read the main source file to understand the current parser implementation.
[2026-01-24 12:47:43]
I'll implement indented code blocks according to the plan. Let me start by reading the current implementation.
[2026-01-24 12:47:44]
🔧 Tool Use: Read (ID: toolu_01J2Ca9XAtRNC9PDXPhBrr4x)
{
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs"
}[2026-01-24 12:47:44]
📊 Tool Result:
File content (28970 tokens) exceeds maximum allowed tokens (25000). Please use offset and limit parameters to read specific portions of the file, or use the GrepTool to search for specific content.
[2026-01-24 12:47:46]
💭 Internal Reasoning (click to expand)
The file is large, so I'll need to read it in parts. Let me start by reading the beginning portion to see the structure.
[2026-01-24 12:47:47]
🔧 Tool Use: Read (ID: toolu_013mq39EBmTbSohRMsAJiEdR)
{
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"offset": 1,
"limit": 200
}[2026-01-24 12:47:47]
📊 Tool Result:
1→use std::cell::RefCell;
2→use std::collections::HashMap;
3→use std::sync::LazyLock;
4→
5→use syntect::easy::HighlightLines;
6→use syntect::parsing::SyntaxSet;
7→use syntect::util::as_24_bit_terminal_escaped;
8→use two_face::theme::{EmbeddedLazyThemeSet, EmbeddedThemeName};
9→use unicode_width::UnicodeWidthStr;
10→
11→// Static theme set using two-face's extended themes
12→static THEME_SET: LazyLock<EmbeddedLazyThemeSet> = LazyLock::new(two_face::theme::extra);
13→
14→// HTML entity lookup table
15→static HTML_ENTITIES: LazyLock<HashMap<&'static str, char>> = LazyLock::new(|| {
16→ let mut m = HashMap::new();
17→ // Essential (XML) entities
18→ m.insert("amp", '&');
19→ m.insert("lt", '<');
20→ m.insert("gt", '>');
21→ m.insert("quot", '"');
22→ m.insert("apos", '\'');
23→ // Whitespace
24→ m.insert("nbsp", '\u{00A0}');
25→ // Typographic
26→ m.insert("ndash", '–');
27→ m.insert("mdash", '—');
28→ m.insert("hellip", '…');
29→ m.insert("lsquo", '\u{2018}'); // '
30→ m.insert("rsquo", '\u{2019}'); // '
31→ m.insert("ldquo", '\u{201C}'); // "
32→ m.insert("rdquo", '\u{201D}'); // "
33→ m.insert("bull", '•');
34→ m.insert("middot", '·');
35→ // Symbols
36→ m.insert("copy", '©');
37→ m.insert("reg", '®');
38→ m.insert("trade", '™');
39→ m.insert("deg", '°');
40→ m.insert("plusmn", '±');
41→ m.insert("times", '×');
42→ m.insert("divide", '÷');
43→ // Fractions
44→ m.insert("frac14", '¼');
45→ m.insert("frac12", '½');
46→ m.insert("frac34", '¾');
47→ // Currency
48→ m.insert("cent", '¢');
49→ m.insert("pound", '£');
50→ m.insert("euro", '€');
51→ m.insert("yen", '¥');
52→ // Arrows
53→ m.insert("larr", '←');
54→ m.insert("rarr", '→');
55→ m.insert("uarr", '↑');
56→ m.insert("darr", '↓');
57→ m
58→});
59→
60→/// Column alignment in tables
61→#[derive(Debug, Clone, Copy, PartialEq)]
62→enum Alignment {
63→ Left,
64→ Center,
65→ Right,
66→}
67→
68→/// List item type
69→#[derive(Debug, Clone, Copy, PartialEq)]
70→enum ListItemType {
71→ Unordered,
72→ Ordered,
73→}
74→
75→/// Callout type for GitHub-style alerts
76→#[derive(Debug, Clone, Copy, PartialEq)]
77→enum CalloutType {
78→ Note,
79→ Tip,
80→ Important,
81→ Warning,
82→ Caution,
83→}
84→
85→/// Image protocol for rendering images
86→#[derive(Debug, Clone, Copy, PartialEq)]
87→pub enum ImageProtocol {
88→ None,
89→ Kitty,
90→}
91→
92→/// Image data parsed from markdown
93→#[derive(Debug)]
94→struct ImageData {
95→ alt: String,
96→ src: String,
97→ end_pos: usize,
98→}
99→
100→/// Streaming markdown parser that emits formatted blocks incrementally
101→pub struct StreamingParser {
102→ buffer: String,
103→ state: ParserState,
104→ current_block: BlockBuilder,
105→ syntax_set: SyntaxSet,
106→ theme_set: &'static EmbeddedLazyThemeSet,
107→ theme_name: String,
108→ image_protocol: ImageProtocol,
109→ width: usize,
110→ /// Cache for prefetched image data (URL -> image bytes)
111→ image_cache: HashMap<String, Vec<u8>>,
112→ /// Link reference definitions: normalized_label -> (url, optional_title)
113→ link_definitions: HashMap<String, (String, Option<String>)>,
114→ /// Pending citations for bibliography: (citation_number, label, display_text)
115→ pending_citations: RefCell<Vec<(usize, String, String)>>,
116→ /// Next citation number to assign
117→ next_citation_number: RefCell<usize>,
118→}
119→
120→/// Calculate the default output width: min(terminal_width, 80)
121→fn default_width() -> usize {
122→ term_size::dimensions()
123→ .map(|(w, _)| w.min(80))
124→ .unwrap_or(80)
125→}
126→
127→#[derive(Debug, Clone, PartialEq)]
128→enum ParserState {
129→ Ready,
130→ InParagraph,
131→ InCodeBlock {
132→ info: String,
133→ fence: String,
134→ indent_offset: usize,
135→ },
136→ InList,
137→ InListAfterBlank, // In a list but just saw a blank line
138→ InTable,
139→ InBlockquote {
140→ nesting_level: usize,
141→ },
142→}
143→
144→#[derive(Debug, Clone)]
145→enum BlockBuilder {
146→ None,
147→ Paragraph {
148→ lines: Vec<String>,
149→ },
150→ CodeBlock {
151→ lines: Vec<String>,
152→ #[allow(dead_code)]
153→ info: String, // Language info for future syntax highlighting
154→ },
155→
... (truncated, 1798 chars omitted)
[2026-01-24 12:47:50]
💭 Internal Reasoning (click to expand)
Good, I can see the ParserState and BlockBuilder enums. Let me continue reading to see more of the implementation, especially the process_line function and handle_ready_state.
[2026-01-24 12:47:51]
🔧 Tool Use: Grep (ID: toolu_015YdH5i9m5qKB4xYQsMTLxW)
{
"pattern": "fn process_line",
"path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"output_mode": "content",
"-n": true
}[2026-01-24 12:47:53]
🔧 Tool Use: Grep (ID: toolu_016nwTe4SZF5UMXuDtsZXELg)
{
"pattern": "fn handle_ready_state",
"path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"output_mode": "content",
"-n": true
}[2026-01-24 12:47:53]
🔧 Tool Use: Grep (ID: toolu_01GXht4CUn9XsKGUPtMCtFit)
{
"pattern": "fn emit_current_block",
"path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"output_mode": "content",
"-n": true
}[2026-01-24 12:47:53]
📊 Tool Result:
1106: fn emit_current_block(&mut self) -> Option<String> {
[2026-01-24 12:47:53]
📊 Tool Result:
442: fn handle_ready_state(&mut self, line: &str) -> Option<String> {
[2026-01-24 12:47:53]
📊 Tool Result:
430: fn process_line(&mut self, line: &str) -> Option<String> {
[2026-01-24 12:47:57]
💭 Internal Reasoning (click to expand)
Now let me read the process_line function and handle_ready_state to understand the pattern.
[2026-01-24 12:47:57]
Let me read the relevant sections.
[2026-01-24 12:47:58]
🔧 Tool Use: Read (ID: toolu_01RCn1evdKt45zVG6w6GX7HK)
{
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"offset": 430,
"limit": 200
}[2026-01-24 12:47:58]
📊 Tool Result:
430→ fn process_line(&mut self, line: &str) -> Option<String> {
431→ match &self.state {
432→ ParserState::Ready => self.handle_ready_state(line),
433→ ParserState::InParagraph => self.handle_in_paragraph(line),
434→ ParserState::InCodeBlock { .. } => self.handle_in_code_block(line),
435→ ParserState::InList => self.handle_in_list(line),
436→ ParserState::InListAfterBlank => self.handle_in_list_after_blank(line),
437→ ParserState::InTable => self.handle_in_table(line),
438→ ParserState::InBlockquote { .. } => self.handle_in_blockquote(line),
439→ }
440→ }
441→
442→ fn handle_ready_state(&mut self, line: &str) -> Option<String> {
443→ let trimmed = line.trim_end_matches('\n');
444→
445→ // Check for blank line
446→ if trimmed.is_empty() {
447→ return None;
448→ }
449→
450→ // Check for HTML comment line (<!-- ... -->)
451→ // These should be silently skipped
452→ if self.is_html_comment_line(trimmed) {
453→ return None;
454→ }
455→
456→ // Check for ATX heading (# )
457→ if let Some(level) = self.parse_atx_heading(trimmed) {
458→ let text = trimmed[level..].trim_start().to_string();
459→ // Headings complete on the same line - emit immediately
460→ return Some(self.format_heading(level, &text));
461→ }
462→
463→ // Check for code fence (```)
464→ if let Some((info, fence, indent_offset)) = self.parse_code_fence(trimmed) {
465→ self.state = ParserState::InCodeBlock {
466→ info: info.clone(),
467→ fence: fence.clone(),
468→ indent_offset,
469→ };
470→ self.current_block = BlockBuilder::CodeBlock {
471→ lines: Vec::new(),
472→ info,
473→ };
474→ return None;
475→ }
476→
477→ // Check for blockquote
478→ if let Some(nesting_level) = self.parse_blockquote_marker(trimmed) {
479→ let content = self.strip_blockquote_markers(trimmed, nesting_level);
480→ self.state = ParserState::InBlockquote { nesting_level };
481→ self.current_block = BlockBuilder::Blockquote {
482→ lines: vec![(nesting_level, content)],
483→ current_nesting: nesting_level,
484→ };
485→ return None;
486→ }
487→
488→ // Check for horizontal rule (thematic break)
489→ // Must be checked before list items per GFM spec
490→ if self.is_horizontal_rule(trimmed) {
491→ return Some(self.format_horizontal_rule());
492→ }
493→
494→ // Check for list item (- or digit.)
495→ if let Some((indent, item_type)) = self.parse_list_item(trimmed) {
496→ self.state = ParserState::InList;
497→ self.current_block = BlockBuilder::List {
498→ items: vec![(indent, item_type, trimmed.to_string())],
499→ };
500→ return None;
501→ }
502→
503→ // Check for link reference definition [label]: url "title"
504→ // These are stored but never emit content
505→ if let Some((label, url, title)) = self.parse_link_definition(trimmed) {
506→ let normalized_label = self.normalize_link_label(&label);
507→ // First definition wins (don't overwrite)
508→ self.link_definitions
509→ .entry(normalized_label)
510→ .or_insert((url, title));
511→ return None;
512→ }
513→
514→ // Otherwise, start a paragraph
515→ self.state = ParserState::InParagraph;
516→ self.current_block = BlockBuilder::Paragraph {
517→ lines: vec![trimmed.to_string()],
518→ };
519→ None
520→ }
521→
522→ fn handle_in_paragraph(&mut self, line: &str) -> Option<String> {
523→ let trimmed = line.trim_end_matches('\n');
524→
525→ // Blank line completes paragraph
526→ if trimmed.is_empty() {
527→ return self.emit_current_block();
528→ }
529→
530→ // Check if this is a setext heading underline
531→ if let Some(level) = self.parse_setext_underline(trimmed) {
532→ if let BlockBuilder::Paragraph { lines } = &self.current_block {
533→ // Join all lines to form the heading text
534→ let text = lines.join(" ");
535→ self.state = ParserState::Ready;
536→ self.current_block = BlockBuilder::None;
537→ return Some(self.format_heading(level, &
... (truncated, 4423 chars omitted)
[2026-01-24 12:48:02]
💭 Internal Reasoning (click to expand)
Good, I'm getting a picture of the code structure. Let me now read the emit_current_block function to see how blocks are emitted.
[2026-01-24 12:48:03]
🔧 Tool Use: Read (ID: toolu_01L7y3Ap3T2wEF7M44d9EoSk)
{
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"offset": 1106,
"limit": 100
}[2026-01-24 12:48:03]
📊 Tool Result:
1106→ fn emit_current_block(&mut self) -> Option<String> {
1107→ let block = std::mem::replace(&mut self.current_block, BlockBuilder::None);
1108→ self.state = ParserState::Ready;
1109→
1110→ // If images are enabled, prefetch all images in the block in parallel
1111→ if self.image_protocol != ImageProtocol::None {
1112→ let block_text = self.extract_block_text(&block);
1113→ let urls = self.extract_image_urls(&block_text);
1114→ if !urls.is_empty() {
1115→ self.prefetch_images(&urls);
1116→ }
1117→ }
1118→
1119→ match block {
1120→ BlockBuilder::None => None,
1121→ BlockBuilder::Paragraph { lines } => Some(self.format_paragraph(&lines)),
1122→ BlockBuilder::CodeBlock { lines, info } => Some(self.format_code_block(&lines, &info)),
1123→ BlockBuilder::List { items } => Some(self.format_list(&items)),
1124→ BlockBuilder::Table {
1125→ header,
1126→ alignments,
1127→ rows,
1128→ } => Some(self.format_table(&header, &alignments, &rows)),
1129→ BlockBuilder::Blockquote { lines, .. } => Some(self.format_blockquote(&lines)),
1130→ }
1131→ }
1132→
1133→ /// Extract all text content from a block for image URL scanning
1134→ fn extract_block_text(&self, block: &BlockBuilder) -> String {
1135→ match block {
1136→ BlockBuilder::None => String::new(),
1137→ BlockBuilder::Paragraph { lines } => lines.join("\n"),
1138→ BlockBuilder::CodeBlock { .. } => String::new(), // Code blocks don't have images
1139→ BlockBuilder::List { items } => items
1140→ .iter()
1141→ .map(|(_, _, s)| s.as_str())
1142→ .collect::<Vec<_>>()
1143→ .join("\n"),
1144→ BlockBuilder::Table { header, rows, .. } => {
1145→ let mut text = header.join("\n");
1146→ for row in rows {
1147→ text.push('\n');
1148→ text.push_str(&row.join("\n"));
1149→ }
1150→ text
1151→ }
1152→ BlockBuilder::Blockquote { lines, .. } => lines
1153→ .iter()
1154→ .map(|(_, s)| s.as_str())
1155→ .collect::<Vec<_>>()
1156→ .join("\n"),
1157→ }
1158→ }
1159→
1160→ fn format_heading(&self, level: usize, text: &str) -> String {
1161→ let formatted_text = self.format_inline(text);
1162→ // Heading: blue and bold, with line break after for spacing
1163→ // Replace any ANSI reset codes within the formatted text to restore heading style
1164→ // This prevents inline formatting (like _italic_) from breaking the heading color
1165→ let heading_style = "\u{001b}[1;34m";
1166→ let formatted_text =
1167→ formatted_text.replace("\u{001b}[0m", &format!("\u{001b}[0m{}", heading_style));
1168→ format!(
1169→ "{}{} {}\u{001b}[0m\n\n",
1170→ heading_style,
1171→ "#".repeat(level),
1172→ formatted_text
1173→ )
1174→ }
1175→
1176→ fn format_horizontal_rule(&self) -> String {
1177→ // Use a line of dashes with dim/gray color
1178→ let rule = "─".repeat(self.width);
1179→ format!("\u{001b}[2m{}\u{001b}[0m\n\n", rule)
1180→ }
1181→
1182→ fn format_paragraph(&self, lines: &[String]) -> String {
1183→ let mut result = String::new();
1184→
1185→ for (i, line) in lines.iter().enumerate() {
1186→ // Check for hard line break: 2+ trailing spaces or trailing backslash
1187→ let has_hard_break = line.ends_with(" ")
1188→ || line.ends_with(" ")
1189→ || line.ends_with(" ")
1190→ || line.ends_with('\\');
1191→
1192→ // Remove trailing spaces/backslash for formatting
1193→ let trimmed = if line.ends_with('\\') {
1194→ &line[..line.len() - 1]
1195→ } else {
1196→ line.trim_end()
1197→ };
1198→
1199→ result.push_str(trimmed);
1200→
1201→ // Add line break or space depending on hard break
1202→ if has_hard_break && i < lines.len() - 1 {
1203→ result.push('\n');
1204→ } else if i < lines.len() - 1 {
1205→ result.push(' ');
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer
... (truncated, 55 chars omitted)
[2026-01-24 12:48:08]
💭 Internal Reasoning (click to expand)
Now let me look at the format_code_block function to understand how code blocks are formatted. This will help me format indented code blocks.
[2026-01-24 12:48:10]
🔧 Tool Use: Grep (ID: toolu_013JEsUNW92QNkMNA88GfXW2)
{
"pattern": "fn format_code_block",
"path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"output_mode": "content",
"-n": true
}[2026-01-24 12:48:10]
📊 Tool Result:
1230: fn format_code_block(&self, lines: &[String], info: &str) -> String {
[2026-01-24 12:48:14]
💭 Internal Reasoning (click to expand)
Now let me create the task list and start implementing the changes.
[2026-01-24 12:48:15]
🔧 Tool Use: TaskCreate (ID: toolu_01LoHUXv7RG9Avz5hudtSkpQ)
{
"subject": "Add InIndentedCodeBlock variant to ParserState",
"description": "Add the InIndentedCodeBlock variant to the ParserState enum after line 142",
"activeForm": "Adding ParserState variant"
}[2026-01-24 12:48:16]
🔧 Tool Use: TaskCreate (ID: toolu_01SrFXABtp92er437PFgSEa5)
{
"subject": "Add IndentedCodeBlock variant to BlockBuilder",
"description": "Add the IndentedCodeBlock { lines: Vec<String> } variant to the BlockBuilder enum after line 167",
"activeForm": "Adding BlockBuilder variant"
}[2026-01-24 12:48:17]
🔧 Tool Use: TaskCreate (ID: toolu_01UA8BHQBDR4yLAAXj1juNuq)
{
"subject": "Add is_indented_code_line helper function",
"description": "Add a helper function to detect if a line is indented with 4+ spaces or a tab, returning the content without the indentation",
"activeForm": "Adding helper function"
}[2026-01-24 12:48:19]
🔧 Tool Use: TaskCreate (ID: toolu_01Q312ZXn145vLGoVvSNtRB6)
{
"subject": "Add indented code detection to handle_ready_state",
"description": "Modify handle_ready_state to detect indented code blocks after link definitions, before falling through to paragraph",
"activeForm": "Modifying handle_ready_state"
}[2026-01-24 12:48:20]
🔧 Tool Use: TaskCreate (ID: toolu_01WGKEP9qqpk16tPCzPWp2X5)
{
"subject": "Add dispatch in process_line for InIndentedCodeBlock",
"description": "Add the case to process_line that dispatches to handle_in_indented_code_block",
"activeForm": "Adding dispatch case"
}[2026-01-24 12:48:22]
🔧 Tool Use: TaskCreate (ID: toolu_01TWY8oztXfFKavE1p41w65y)
{
"subject": "Implement handle_in_indented_code_block handler",
"description": "Add the state handler that accumulates lines, handles blank lines, and emits the block when a non-indented line is encountered",
"activeForm": "Implementing state handler"
}[2026-01-24 12:48:23]
🔧 Tool Use: TaskCreate (ID: toolu_01NDTj1QDKTxgDYs3QzQMksL)
{
"subject": "Add IndentedCodeBlock case to emit_current_block",
"description": "Add handling for IndentedCodeBlock in emit_current_block, using format_code_block with empty info string",
"activeForm": "Adding emit case"
}[2026-01-24 12:48:25]
🔧 Tool Use: TaskCreate (ID: toolu_01E1XecCkvSeBQdRkA7mYPTo)
{
"subject": "Create test file for indented code blocks",
"description": "Create tests/fixtures/blocks/indented_code.toml with tests for basic indented code, blank lines preservation, trailing blank line stripping, extra indentation preservation, and tab indentation",
"activeForm": "Creating test file"
}[2026-01-24 12:48:26]
🔧 Tool Use: TaskCreate (ID: toolu_01RjwYjAw6xvEN4KJ6dKNyX5)
{
"subject": "Run verification commands",
"description": "Run cargo fmt, cargo build, cargo clippy, and cargo test to verify the implementation",
"activeForm": "Running verification"
}[2026-01-24 12:48:26]
📊 Tool Result:
Task #1 created successfully: Add InIndentedCodeBlock variant to ParserState
[2026-01-24 12:48:26]
📊 Tool Result:
Task #2 created successfully: Add IndentedCodeBlock variant to BlockBuilder
[2026-01-24 12:48:26]
📊 Tool Result:
Task #3 created successfully: Add is_indented_code_line helper function
[2026-01-24 12:48:26]
📊 Tool Result:
Task #4 created successfully: Add indented code detection to handle_ready_state
[2026-01-24 12:48:26]
📊 Tool Result:
Task #5 created successfully: Add dispatch in process_line for InIndentedCodeBlock
[2026-01-24 12:48:26]
📊 Tool Result:
Task #6 created successfully: Implement handle_in_indented_code_block handler
[2026-01-24 12:48:26]
📊 Tool Result:
Task #7 created successfully: Add IndentedCodeBlock case to emit_current_block
[2026-01-24 12:48:26]
📊 Tool Result:
Task #8 created successfully: Create test file for indented code blocks
[2026-01-24 12:48:26]
📊 Tool Result:
Task #9 created successfully: Run verification commands
[2026-01-24 12:48:29]
💭 Internal Reasoning (click to expand)
Now let me start with task 1 - adding the InIndentedCodeBlock variant to ParserState.
[2026-01-24 12:48:29]
🔧 Tool Use: TaskUpdate (ID: toolu_01VVoggGwfgPYCFXM9vmczWe)
{
"taskId": "1",
"status": "in_progress"
}[2026-01-24 12:48:29]
📊 Tool Result:
Updated task #1 status
[2026-01-24 12:48:32]
💭 Internal Reasoning (click to expand)
Now let me add the InIndentedCodeBlock variant. I need to find the exact location in the ParserState enum. From the earlier read, I see the enum ends at line 142.
[2026-01-24 12:48:35]
🔧 Tool Use: Edit (ID: toolu_01HRjguuXqEvJgjpmi2guCCd)
{
"replace_all": false,
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"old_string": " InBlockquote {\n nesting_level: usize,\n },\n}",
"new_string": " InBlockquote {\n nesting_level: usize,\n },\n InIndentedCodeBlock,\n}"
}[2026-01-24 12:48:35]
📊 Tool Result:
The file /Users/llimllib/code/mdriver/features/src/lib.rs has been updated successfully.
[2026-01-24 12:48:43]
💭 Internal Reasoning (click to expand)
Good. Now let me mark task 1 as completed and start task 2 to add the BlockBuilder variant.
[2026-01-24 12:48:43]
🔧 Tool Use: TaskUpdate (ID: toolu_01LGLc7WPwBcw8TeeBXFkp29)
{
"taskId": "1",
"status": "completed"
}[2026-01-24 12:48:44]
🔧 Tool Use: TaskUpdate (ID: toolu_01LKobb7PaLEiKEnJvZtRhVp)
{
"taskId": "2",
"status": "in_progress"
}[2026-01-24 12:48:44]
📊 Tool Result:
Updated task #1 status
[2026-01-24 12:48:44]
📊 Tool Result:
Updated task #2 status
[2026-01-24 12:48:48]
💭 Internal Reasoning (click to expand)
Expected - we need to add the missing arm in process_line. But first let me add the BlockBuilder variant.
[2026-01-24 12:48:49]
🔧 Tool Use: Edit (ID: toolu_01Cu1cV7Y9QcKJjJx96HMuyc)
{
"replace_all": false,
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"old_string": " Blockquote {\n lines: Vec<(usize, String)>,\n current_nesting: usize,\n },\n}",
"new_string": " Blockquote {\n lines: Vec<(usize, String)>,\n current_nesting: usize,\n },\n IndentedCodeBlock {\n lines: Vec<String>,\n },\n}"
}[2026-01-24 12:48:49]
📊 Tool Result:
The file /Users/llimllib/code/mdriver/features/src/lib.rs has been updated successfully.
[2026-01-24 12:48:57]
💭 Internal Reasoning (click to expand)
Good. Now let me mark task 2 as completed and move on to task 3 to add the helper function. But first I should also add task 5 (the dispatch) and task 7 (emit_current_block) since they're all related.
[2026-01-24 12:48:57]
🔧 Tool Use: TaskUpdate (ID: toolu_01RJoEZKPxnWJnx8jsUwmTKF)
{
"taskId": "2",
"status": "completed"
}[2026-01-24 12:48:57]
🔧 Tool Use: TaskUpdate (ID: toolu_01BvLv3UXUikGxhvE2Rq8WBQ)
{
"taskId": "3",
"status": "in_progress"
}[2026-01-24 12:48:58]
📊 Tool Result:
Updated task #2 status
[2026-01-24 12:48:58]
📊 Tool Result:
Updated task #3 status
[2026-01-24 12:49:01]
💭 Internal Reasoning (click to expand)
Good, these are expected. Let me now add the helper function. I need to find a good place to put it. Let me first read the area where similar helper functions are located.
[2026-01-24 12:49:02]
Let me find where similar helper functions are defined.
[2026-01-24 12:49:03]
🔧 Tool Use: Grep (ID: toolu_01FBuJtDnxuT1nyHGG2PSuDp)
{
"pattern": "fn parse_atx_heading",
"path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"output_mode": "content",
"-n": true
}[2026-01-24 12:49:04]
📊 Tool Result:
794: fn parse_atx_heading(&self, line: &str) -> Option<usize> {
[2026-01-24 12:49:07]
💭 Internal Reasoning (click to expand)
Let me read that area to understand the pattern for helper functions.
[2026-01-24 12:49:08]
🔧 Tool Use: Read (ID: toolu_01Y5PV9VHffjuzVXZodjZePL)
{
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"offset": 790,
"limit": 80
}[2026-01-24 12:49:08]
📊 Tool Result:
790→
791→ None
792→ }
793→
794→ fn parse_atx_heading(&self, line: &str) -> Option<usize> {
795→ let mut level = 0;
796→ for ch in line.chars() {
797→ if ch == '#' {
798→ level += 1;
799→ if level > 6 {
800→ return None;
801→ }
802→ } else if ch == ' ' && level > 0 {
803→ return Some(level);
804→ } else {
805→ return None;
806→ }
807→ }
808→ None
809→ }
810→
811→ fn parse_setext_underline(&self, line: &str) -> Option<usize> {
812→ // Setext underline: 0-3 spaces, then sequence of = or -, with trailing spaces allowed
813→ let leading_spaces = line.len() - line.trim_start().len();
814→
815→ if leading_spaces > 3 {
816→ return None;
817→ }
818→
819→ let trimmed = line.trim();
820→
821→ // Check for all = (level 1)
822→ if !trimmed.is_empty() && trimmed.chars().all(|c| c == '=') {
823→ return Some(1);
824→ }
825→
826→ // Check for all - (level 2)
827→ if !trimmed.is_empty() && trimmed.chars().all(|c| c == '-') {
828→ return Some(2);
829→ }
830→
831→ None
832→ }
833→
834→ /// Check if a line is entirely an HTML comment (<!-- ... -->)
835→ fn is_html_comment_line(&self, line: &str) -> bool {
836→ let trimmed = line.trim();
837→ if !trimmed.starts_with("<!--") {
838→ return false;
839→ }
840→ if !trimmed.ends_with("-->") {
841→ return false;
842→ }
843→ // Ensure the comment is properly formed (has content or is empty)
844→ // and doesn't have an early --> before the final one
845→ let inner = &trimmed[4..trimmed.len() - 3];
846→ // Make sure there's no --> in the middle (which would mean malformed)
847→ !inner.contains("-->")
848→ }
849→
850→ fn is_horizontal_rule(&self, line: &str) -> bool {
851→ // Horizontal rule: 0-3 spaces, then 3+ matching -, _, or * chars
852→ // with optional spaces/tabs between them
853→ let leading_spaces = line.len() - line.trim_start().len();
854→
855→ if leading_spaces > 3 {
856→ return false;
857→ }
858→
859→ let trimmed = line.trim();
860→
861→ // Count matching characters
862→ let mut rule_char: Option<char> = None;
863→ let mut count = 0;
864→
865→ for ch in trimmed.chars() {
866→ match ch {
867→ '-' | '_' | '*' => {
868→ if let Some(rc) = rule_char {
869→ if rc != ch {
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>
[2026-01-24 12:49:12]
💭 Internal Reasoning (click to expand)
Good, I can see the pattern. The helper functions are defined in this area. I'll add my is_indented_code_line function near the other parsing helper functions. Let me add it after is_html_comment_line.
[2026-01-24 12:49:17]
🔧 Tool Use: Edit (ID: toolu_01D8k1Q1jtmV8ogomPhpmRwj)
{
"replace_all": false,
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"old_string": " /// Check if a line is entirely an HTML comment (<!-- ... -->)\n fn is_html_comment_line(&self, line: &str) -> bool {\n let trimmed = line.trim();\n if !trimmed.starts_with(\"<!--\") {\n return false;\n }\n if !trimmed.ends_with(\"-->\") {\n return false;\n }\n // Ensure the comment is properly formed (has content or is empty)\n // and doesn't have an early --> before the final one\n let inner = &trimmed[4..trimmed.len() - 3];\n // Make sure there's no --> in the middle (which would mean malformed)\n !inner.contains(\"-->\")\n }\n\n fn is_horizontal_rule",
"new_string": " /// Check if a line is entirely an HTML comment (<!-- ... -->)\n fn is_html_comment_line(&self, line: &str) -> bool {\n let trimmed = line.trim();\n if !trimmed.starts_with(\"<!--\") {\n return false;\n }\n if !trimmed.ends_with(\"-->\") {\n return false;\n }\n // Ensure the comment is properly formed (has content or is empty)\n // and doesn't have an early --> before the final one\n let inner = &trimmed[4..trimmed.len() - 3];\n // Make sure there's no --> in the middle (which would mean malformed)\n !inner.contains(\"-->\")\n }\n\n /// Check if a line is indented code (4+ spaces or tab), return content with indentation stripped\n fn is_indented_code_line<'a>(&self, line: &'a str) -> Option<&'a str> {\n if line.starts_with(\" \") {\n Some(&line[4..])\n } else if line.starts_with('\\t') {\n Some(&line[1..])\n } else {\n None\n }\n }\n\n fn is_horizontal_rule"
}[2026-01-24 12:49:18]
📊 Tool Result:
The file /Users/llimllib/code/mdriver/features/src/lib.rs has been updated successfully.
[2026-01-24 12:49:22]
💭 Internal Reasoning (click to expand)
Good. Now let me mark task 3 as completed and move on to task 5 - adding the dispatch in process_line.
[2026-01-24 12:49:22]
🔧 Tool Use: TaskUpdate (ID: toolu_01HtUzULa4zgeYHzjU2pujjH)
{
"taskId": "3",
"status": "completed"
}[2026-01-24 12:49:22]
🔧 Tool Use: TaskUpdate (ID: toolu_01UjbJMQKYTcxe2pwMHU8jM4)
{
"taskId": "5",
"status": "in_progress"
}[2026-01-24 12:49:22]
📊 Tool Result:
Updated task #3 status
[2026-01-24 12:49:22]
📊 Tool Result:
Updated task #5 status
[2026-01-24 12:49:26]
💭 Internal Reasoning (click to expand)
Good, the warnings have changed. Now let me add the dispatch in process_line. Let me read the exact area.
[2026-01-24 12:49:26]
🔧 Tool Use: Read (ID: toolu_013j2P87uu7EeieFKWU9UZzo)
{
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"offset": 430,
"limit": 20
}[2026-01-24 12:49:26]
📊 Tool Result:
430→ output.push('\n');
431→ Some(output)
432→ }
433→
434→ fn process_line(&mut self, line: &str) -> Option<String> {
435→ match &self.state {
436→ ParserState::Ready => self.handle_ready_state(line),
437→ ParserState::InParagraph => self.handle_in_paragraph(line),
438→ ParserState::InCodeBlock { .. } => self.handle_in_code_block(line),
439→ ParserState::InList => self.handle_in_list(line),
440→ ParserState::InListAfterBlank => self.handle_in_list_after_blank(line),
441→ ParserState::InTable => self.handle_in_table(line),
442→ ParserState::InBlockquote { .. } => self.handle_in_blockquote(line),
443→ }
444→ }
445→
446→ fn handle_ready_state(&mut self, line: &str) -> Option<String> {
447→ let trimmed = line.trim_end_matches('\n');
448→
449→ // Check for blank line
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>
[2026-01-24 12:49:29]
💭 Internal Reasoning (click to expand)
Good, now I can add the dispatch for InIndentedCodeBlock.
[2026-01-24 12:49:33]
🔧 Tool Use: Edit (ID: toolu_01KSHpcrkymNKVwA1WrV2cHV)
{
"replace_all": false,
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"old_string": " fn process_line(&mut self, line: &str) -> Option<String> {\n match &self.state {\n ParserState::Ready => self.handle_ready_state(line),\n ParserState::InParagraph => self.handle_in_paragraph(line),\n ParserState::InCodeBlock { .. } => self.handle_in_code_block(line),\n ParserState::InList => self.handle_in_list(line),\n ParserState::InListAfterBlank => self.handle_in_list_after_blank(line),\n ParserState::InTable => self.handle_in_table(line),\n ParserState::InBlockquote { .. } => self.handle_in_blockquote(line),\n }\n }",
"new_string": " fn process_line(&mut self, line: &str) -> Option<String> {\n match &self.state {\n ParserState::Ready => self.handle_ready_state(line),\n ParserState::InParagraph => self.handle_in_paragraph(line),\n ParserState::InCodeBlock { .. } => self.handle_in_code_block(line),\n ParserState::InList => self.handle_in_list(line),\n ParserState::InListAfterBlank => self.handle_in_list_after_blank(line),\n ParserState::InTable => self.handle_in_table(line),\n ParserState::InBlockquote { .. } => self.handle_in_blockquote(line),\n ParserState::InIndentedCodeBlock => self.handle_in_indented_code_block(line),\n }\n }"
}[2026-01-24 12:49:33]
📊 Tool Result:
The file /Users/llimllib/code/mdriver/features/src/lib.rs has been updated successfully.
[2026-01-24 12:49:36]
💭 Internal Reasoning (click to expand)
Good. Now let me mark task 5 as completed and add the handler function. Let me first find where to add it (after handle_in_blockquote).
[2026-01-24 12:49:37]
🔧 Tool Use: TaskUpdate (ID: toolu_01P7S1jYQDubSrcnkDfoTNYb)
{
"taskId": "5",
"status": "completed"
}[2026-01-24 12:49:37]
🔧 Tool Use: TaskUpdate (ID: toolu_01UW4fBDALoFNna3def9XbRD)
{
"taskId": "6",
"status": "in_progress"
}[2026-01-24 12:49:37]
📊 Tool Result:
Updated task #5 status
[2026-01-24 12:49:37]
📊 Tool Result:
Updated task #6 status
[2026-01-24 12:49:40]
💭 Internal Reasoning (click to expand)
Now I need to add the handler function. Let me find where handle_in_blockquote ends.
[2026-01-24 12:49:42]
🔧 Tool Use: Grep (ID: toolu_01X8UEpFY78cr5Bsfb6UdXCZ)
{
"pattern": "fn handle_in_blockquote",
"path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"output_mode": "content",
"-n": true
}[2026-01-24 12:49:42]
📊 Tool Result:
751: fn handle_in_blockquote(&mut self, line: &str) -> Option<String> {
[2026-01-24 12:49:45]
💭 Internal Reasoning (click to expand)
Let me read handle_in_blockquote to find where it ends so I can add the new function after it.
[2026-01-24 12:49:46]
🔧 Tool Use: Read (ID: toolu_01JrRToPYYBhsuSrbWkNhbQ3)
{
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"offset": 751,
"limit": 60
}[2026-01-24 12:49:46]
📊 Tool Result:
751→ fn handle_in_blockquote(&mut self, line: &str) -> Option<String> {
752→ let trimmed = line.trim_end_matches('\n');
753→
754→ // Blank line terminates
755→ if trimmed.is_empty() {
756→ return self.emit_current_block();
757→ }
758→
759→ // Check if line has blockquote marker
760→ if let Some(nesting_level) = self.parse_blockquote_marker(trimmed) {
761→ let content = self.strip_blockquote_markers(trimmed, nesting_level);
762→
763→ if let BlockBuilder::Blockquote {
764→ lines,
765→ current_nesting,
766→ } = &mut self.current_block
767→ {
768→ // Update state nesting
769→ if let ParserState::InBlockquote {
770→ nesting_level: ref mut state_nesting,
771→ } = &mut self.state
772→ {
773→ *state_nesting = nesting_level;
774→ }
775→
776→ lines.push((nesting_level, content));
777→ *current_nesting = nesting_level;
778→ }
779→ return None;
780→ }
781→
782→ // Lazy continuation: line without '>' continues at current nesting
783→ if let BlockBuilder::Blockquote {
784→ lines,
785→ current_nesting,
786→ } = &mut self.current_block
787→ {
788→ lines.push((*current_nesting, trimmed.to_string()));
789→ return None;
790→ }
791→
792→ None
793→ }
794→
795→ fn parse_atx_heading(&self, line: &str) -> Option<usize> {
796→ let mut level = 0;
797→ for ch in line.chars() {
798→ if ch == '#' {
799→ level += 1;
800→ if level > 6 {
801→ return None;
802→ }
803→ } else if ch == ' ' && level > 0 {
804→ return Some(level);
805→ } else {
806→ return None;
807→ }
808→ }
809→ None
810→ }
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>
[2026-01-24 12:49:48]
💭 Internal Reasoning (click to expand)
Now I'll add the handle_in_indented_code_block function after handle_in_blockquote (line 793) and before parse_atx_heading (line 795).
[2026-01-24 12:49:57]
🔧 Tool Use: Edit (ID: toolu_01X1faKMmYNfDrJdFfrUqkDg)
{
"replace_all": false,
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"old_string": " None\n }\n\n fn parse_atx_heading(&self, line: &str) -> Option<usize> {\n let mut level = 0;\n for ch in line.chars() {\n if ch == '#' {\n level += 1;\n if level > 6 {\n return None;\n }\n } else if ch == ' ' && level > 0 {\n return Some(level);\n } else {\n return None;\n }\n }\n None\n }",
"new_string": " None\n }\n\n fn handle_in_indented_code_block(&mut self, line: &str) -> Option<String> {\n let trimmed = line.trim_end_matches('\\n');\n\n // Blank line - preserve in code block\n if trimmed.is_empty() {\n if let BlockBuilder::IndentedCodeBlock { lines } = &mut self.current_block {\n lines.push(String::new());\n }\n return None;\n }\n\n // Still indented? Continue accumulating\n if let Some(content) = self.is_indented_code_line(trimmed) {\n if let BlockBuilder::IndentedCodeBlock { lines } = &mut self.current_block {\n lines.push(content.to_string());\n }\n return None;\n }\n\n // Not indented - emit block and process line in ready state\n let output = self.emit_current_block();\n let next_output = self.handle_ready_state(line);\n\n match (output, next_output) {\n (Some(o1), Some(o2)) => Some(format!(\"{}{}\", o1, o2)),\n (Some(o), None) | (None, Some(o)) => Some(o),\n (None, None) => None,\n }\n }\n\n fn parse_atx_heading(&self, line: &str) -> Option<usize> {\n let mut level = 0;\n for ch in line.chars() {\n if ch == '#' {\n level += 1;\n if level > 6 {\n return None;\n }\n } else if ch == ' ' && level > 0 {\n return Some(level);\n } else {\n return None;\n }\n }\n None\n }"
}[2026-01-24 12:49:57]
📊 Tool Result:
The file /Users/llimllib/code/mdriver/features/src/lib.rs has been updated successfully.
[2026-01-24 12:50:04]
💭 Internal Reasoning (click to expand)
Good. Now I need to mark task 6 as completed and then do task 4 (adding detection in handle_ready_state), and task 7 (emit_current_block).
[2026-01-24 12:50:04]
🔧 Tool Use: TaskUpdate (ID: toolu_01VAFKZcWBwJSXk6vxCnVAyQ)
{
"taskId": "6",
"status": "completed"
}[2026-01-24 12:50:05]
🔧 Tool Use: TaskUpdate (ID: toolu_01AAJkBWDqZpJ8iem9eczAQD)
{
"taskId": "4",
"status": "in_progress"
}[2026-01-24 12:50:05]
📊 Tool Result:
Updated task #6 status
[2026-01-24 12:50:05]
📊 Tool Result:
Updated task #4 status
[2026-01-24 12:50:08]
💭 Internal Reasoning (click to expand)
Good, the handler errors are fixed. Now let me add the detection in handle_ready_state. Let me re-read that section to see the exact location after link definitions.
[2026-01-24 12:50:09]
🔧 Tool Use: Read (ID: toolu_01TrjrPKnxpWxApvyktyQzuP)
{
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"offset": 503,
"limit": 30
}[2026-01-24 12:50:09]
📊 Tool Result:
503→ items: vec![(indent, item_type, trimmed.to_string())],
504→ };
505→ return None;
506→ }
507→
508→ // Check for link reference definition [label]: url "title"
509→ // These are stored but never emit content
510→ if let Some((label, url, title)) = self.parse_link_definition(trimmed) {
511→ let normalized_label = self.normalize_link_label(&label);
512→ // First definition wins (don't overwrite)
513→ self.link_definitions
514→ .entry(normalized_label)
515→ .or_insert((url, title));
516→ return None;
517→ }
518→
519→ // Otherwise, start a paragraph
520→ self.state = ParserState::InParagraph;
521→ self.current_block = BlockBuilder::Paragraph {
522→ lines: vec![trimmed.to_string()],
523→ };
524→ None
525→ }
526→
527→ fn handle_in_paragraph(&mut self, line: &str) -> Option<String> {
528→ let trimmed = line.trim_end_matches('\n');
529→
530→ // Blank line completes paragraph
531→ if trimmed.is_empty() {
532→ return self.emit_current_block();
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>
[2026-01-24 12:50:13]
💭 Internal Reasoning (click to expand)
I see the section. I need to add the indented code block detection after the link reference definition check but before the "start a paragraph" fallback.
[2026-01-24 12:50:17]
🔧 Tool Use: Edit (ID: toolu_014gYXF9nfbsXVejNLbR7ZYY)
{
"replace_all": false,
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"old_string": " // Check for link reference definition [label]: url \"title\"\n // These are stored but never emit content\n if let Some((label, url, title)) = self.parse_link_definition(trimmed) {\n let normalized_label = self.normalize_link_label(&label);\n // First definition wins (don't overwrite)\n self.link_definitions\n .entry(normalized_label)\n .or_insert((url, title));\n return None;\n }\n\n // Otherwise, start a paragraph",
"new_string": " // Check for link reference definition [label]: url \"title\"\n // These are stored but never emit content\n if let Some((label, url, title)) = self.parse_link_definition(trimmed) {\n let normalized_label = self.normalize_link_label(&label);\n // First definition wins (don't overwrite)\n self.link_definitions\n .entry(normalized_label)\n .or_insert((url, title));\n return None;\n }\n\n // Check for indented code block (4+ spaces or tab)\n // Must come after list check (lists take precedence)\n if let Some(content) = self.is_indented_code_line(trimmed) {\n self.state = ParserState::InIndentedCodeBlock;\n self.current_block = BlockBuilder::IndentedCodeBlock {\n lines: vec![content.to_string()],\n };\n return None;\n }\n\n // Otherwise, start a paragraph"
}[2026-01-24 12:50:17]
📊 Tool Result:
The file /Users/llimllib/code/mdriver/features/src/lib.rs has been updated successfully.
[2026-01-24 12:50:21]
💭 Internal Reasoning (click to expand)
Good. Now let me mark task 4 as completed and work on task 7 - adding the IndentedCodeBlock case to emit_current_block.
[2026-01-24 12:50:22]
🔧 Tool Use: TaskUpdate (ID: toolu_01LJWrKymz3FA1dq1NUbbNJS)
{
"taskId": "4",
"status": "completed"
}[2026-01-24 12:50:22]
🔧 Tool Use: TaskUpdate (ID: toolu_01R5e7ZAa7fo26Ff2h93EWxR)
{
"taskId": "7",
"status": "in_progress"
}[2026-01-24 12:50:22]
📊 Tool Result:
Updated task #4 status
[2026-01-24 12:50:22]
📊 Tool Result:
Updated task #7 status
[2026-01-24 12:50:25]
💭 Internal Reasoning (click to expand)
Let me read emit_current_block and extract_block_text to add the IndentedCodeBlock case.
[2026-01-24 12:50:26]
🔧 Tool Use: Read (ID: toolu_014edJL1td5ET4gTq9toT7wf)
{
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"offset": 1165,
"limit": 60
}[2026-01-24 12:50:26]
📊 Tool Result:
1165→
1166→ // If images are enabled, prefetch all images in the block in parallel
1167→ if self.image_protocol != ImageProtocol::None {
1168→ let block_text = self.extract_block_text(&block);
1169→ let urls = self.extract_image_urls(&block_text);
1170→ if !urls.is_empty() {
1171→ self.prefetch_images(&urls);
1172→ }
1173→ }
1174→
1175→ match block {
1176→ BlockBuilder::None => None,
1177→ BlockBuilder::Paragraph { lines } => Some(self.format_paragraph(&lines)),
1178→ BlockBuilder::CodeBlock { lines, info } => Some(self.format_code_block(&lines, &info)),
1179→ BlockBuilder::List { items } => Some(self.format_list(&items)),
1180→ BlockBuilder::Table {
1181→ header,
1182→ alignments,
1183→ rows,
1184→ } => Some(self.format_table(&header, &alignments, &rows)),
1185→ BlockBuilder::Blockquote { lines, .. } => Some(self.format_blockquote(&lines)),
1186→ }
1187→ }
1188→
1189→ /// Extract all text content from a block for image URL scanning
1190→ fn extract_block_text(&self, block: &BlockBuilder) -> String {
1191→ match block {
1192→ BlockBuilder::None => String::new(),
1193→ BlockBuilder::Paragraph { lines } => lines.join("\n"),
1194→ BlockBuilder::CodeBlock { .. } => String::new(), // Code blocks don't have images
1195→ BlockBuilder::List { items } => items
1196→ .iter()
1197→ .map(|(_, _, s)| s.as_str())
1198→ .collect::<Vec<_>>()
1199→ .join("\n"),
1200→ BlockBuilder::Table { header, rows, .. } => {
1201→ let mut text = header.join("\n");
1202→ for row in rows {
1203→ text.push('\n');
1204→ text.push_str(&row.join("\n"));
1205→ }
1206→ text
1207→ }
1208→ BlockBuilder::Blockquote { lines, .. } => lines
1209→ .iter()
1210→ .map(|(_, s)| s.as_str())
1211→ .collect::<Vec<_>>()
1212→ .join("\n"),
1213→ }
1214→ }
1215→
1216→ fn format_heading(&self, level: usize, text: &str) -> String {
1217→ let formatted_text = self.format_inline(text);
1218→ // Heading: blue and bold, with line break after for spacing
1219→ // Replace any ANSI reset codes within the formatted text to restore heading style
1220→ // This prevents inline formatting (like _italic_) from breaking the heading color
1221→ let heading_style = "\u{001b}[1;34m";
1222→ let formatted_text =
1223→ formatted_text.replace("\u{001b}[0m", &format!("\u{001b}[0m{}", heading_style));
1224→ format!(
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>
[2026-01-24 12:50:31]
💭 Internal Reasoning (click to expand)
I need to add the IndentedCodeBlock case to both match statements - the emit_current_block match at line 1175 and the extract_block_text match at line 1191.
[2026-01-24 12:50:36]
🔧 Tool Use: Edit (ID: toolu_014Nd6t4eeXtTHi7rJQTyxee)
{
"replace_all": false,
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"old_string": " match block {\n BlockBuilder::None => None,\n BlockBuilder::Paragraph { lines } => Some(self.format_paragraph(&lines)),\n BlockBuilder::CodeBlock { lines, info } => Some(self.format_code_block(&lines, &info)),\n BlockBuilder::List { items } => Some(self.format_list(&items)),\n BlockBuilder::Table {\n header,\n alignments,\n rows,\n } => Some(self.format_table(&header, &alignments, &rows)),\n BlockBuilder::Blockquote { lines, .. } => Some(self.format_blockquote(&lines)),\n }\n }",
"new_string": " match block {\n BlockBuilder::None => None,\n BlockBuilder::Paragraph { lines } => Some(self.format_paragraph(&lines)),\n BlockBuilder::CodeBlock { lines, info } => Some(self.format_code_block(&lines, &info)),\n BlockBuilder::List { items } => Some(self.format_list(&items)),\n BlockBuilder::Table {\n header,\n alignments,\n rows,\n } => Some(self.format_table(&header, &alignments, &rows)),\n BlockBuilder::Blockquote { lines, .. } => Some(self.format_blockquote(&lines)),\n BlockBuilder::IndentedCodeBlock { lines } => {\n let mut lines = lines.clone();\n // Strip trailing blank lines\n while lines.last().is_some_and(|l| l.is_empty()) {\n lines.pop();\n }\n Some(self.format_code_block(&lines, \"\"))\n }\n }\n }"
}[2026-01-24 12:50:36]
📊 Tool Result:
The file /Users/llimllib/code/mdriver/features/src/lib.rs has been updated successfully.
[2026-01-24 12:50:39]
💭 Internal Reasoning (click to expand)
Now let me also add the IndentedCodeBlock case to extract_block_text.
[2026-01-24 12:50:42]
🔧 Tool Use: Edit (ID: toolu_01DMPHFB1dsNUNpHjnjGg3yL)
{
"replace_all": false,
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"old_string": " BlockBuilder::Blockquote { lines, .. } => lines\n .iter()\n .map(|(_, s)| s.as_str())\n .collect::<Vec<_>>()\n .join(\"\\n\"),\n }\n }\n\n fn format_heading",
"new_string": " BlockBuilder::Blockquote { lines, .. } => lines\n .iter()\n .map(|(_, s)| s.as_str())\n .collect::<Vec<_>>()\n .join(\"\\n\"),\n BlockBuilder::IndentedCodeBlock { .. } => String::new(), // Code blocks don't have images\n }\n }\n\n fn format_heading"
}[2026-01-24 12:50:42]
📊 Tool Result:
The file /Users/llimllib/code/mdriver/features/src/lib.rs has been updated successfully.
[2026-01-24 12:50:45]
💭 Internal Reasoning (click to expand)
There seems to be another match statement that needs IndentedCodeBlock. Let me check what's at line 1199.
[2026-01-24 12:50:46]
🔧 Tool Use: Read (ID: toolu_011dxU8MMBeifi8JrMJefnP3)
{
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"offset": 1195,
"limit": 30
}[2026-01-24 12:50:46]
📊 Tool Result:
1195→ }
1196→
1197→ /// Extract all text content from a block for image URL scanning
1198→ fn extract_block_text(&self, block: &BlockBuilder) -> String {
1199→ match block {
1200→ BlockBuilder::None => String::new(),
1201→ BlockBuilder::Paragraph { lines } => lines.join("\n"),
1202→ BlockBuilder::CodeBlock { .. } => String::new(), // Code blocks don't have images
1203→ BlockBuilder::List { items } => items
1204→ .iter()
1205→ .map(|(_, _, s)| s.as_str())
1206→ .collect::<Vec<_>>()
1207→ .join("\n"),
1208→ BlockBuilder::Table { header, rows, .. } => {
1209→ let mut text = header.join("\n");
1210→ for row in rows {
1211→ text.push('\n');
1212→ text.push_str(&row.join("\n"));
1213→ }
1214→ text
1215→ }
1216→ BlockBuilder::Blockquote { lines, .. } => lines
1217→ .iter()
1218→ .map(|(_, s)| s.as_str())
1219→ .collect::<Vec<_>>()
1220→ .join("\n"),
1221→ BlockBuilder::IndentedCodeBlock { .. } => String::new(), // Code blocks don't have images
1222→ }
1223→ }
1224→
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>
[2026-01-24 12:50:50]
💭 Internal Reasoning (click to expand)
I see the edit was applied. Let me look at the error again - it says line 1199 still has a missing match arm. But I just added it at line 1221. Let me check if there's another issue at a different location. The error says `&IndentedCodeBlock`, so it might be a different match statement with a reference pattern. Let me search for other match statements on BlockBuilder.
[2026-01-24 12:50:51]
🔧 Tool Use: Grep (ID: toolu_01RLxyDLEM7mPNU33omfctsA)
{
"pattern": "match.*block",
"path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"output_mode": "content",
"-n": true
}[2026-01-24 12:50:52]
📊 Tool Result:
1175: match block {
1199: match block {
[2026-01-24 12:50:56]
💭 Internal Reasoning (click to expand)
Hmm, there are only two match statements on block. Let me check if there's a problem with a different match statement. Maybe there's a `match &self.current_block` somewhere.
[2026-01-24 12:50:56]
🔧 Tool Use: Grep (ID: toolu_01NfkF5HTeScMt96UNZtgU9m)
{
"pattern": "match.*current_block",
"path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"output_mode": "content",
"-n": true
}[2026-01-24 12:50:57]
📊 Tool Result:
No matches found
[2026-01-24 12:51:00]
💭 Internal Reasoning (click to expand)
Interesting. Let me search for `BlockBuilder::Blockquote` to find all the match arms that handle BlockBuilder variants.
[2026-01-24 12:51:01]
🔧 Tool Use: Grep (ID: toolu_01VLvpfjtneBjVAZKP68jaxJ)
{
"pattern": "BlockBuilder::Blockquote",
"path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"output_mode": "content",
"-n": true
}[2026-01-24 12:51:01]
📊 Tool Result:
486: self.current_block = BlockBuilder::Blockquote {
773: if let BlockBuilder::Blockquote {
793: if let BlockBuilder::Blockquote {
1185: BlockBuilder::Blockquote { lines, .. } => Some(self.format_blockquote(&lines)),
1216: BlockBuilder::Blockquote { lines, .. } => lines
[2026-01-24 12:51:05]
💭 Internal Reasoning (click to expand)
Let me run cargo build to see what the actual error is.
[2026-01-24 12:51:05]
🔧 Tool Use: Bash (ID: toolu_01WnariBwY4nedPw2Vpahmut)
{
"command": "cargo build 2>&1",
"description": "Build the project to check for errors"
}[2026-01-24 12:51:08]
📊 Tool Result:
Compiling unicode-width v0.2.2
Compiling mdriver v0.12.0 (/Users/llimllib/code/mdriver/features)
Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.89s
[2026-01-24 12:51:12]
💭 Internal Reasoning (click to expand)
The build succeeded. The diagnostics might have been from the LSP which was slightly behind. Let me now mark task 7 as completed and move on to task 8 - creating the test file.
[2026-01-24 12:51:13]
🔧 Tool Use: TaskUpdate (ID: toolu_017Vzs1M57ppahSQ6DXb9Vg5)
{
"taskId": "7",
"status": "completed"
}[2026-01-24 12:51:13]
🔧 Tool Use: TaskUpdate (ID: toolu_01WEwNYqAksYEgs4xzxpKFRy)
{
"taskId": "8",
"status": "in_progress"
}[2026-01-24 12:51:13]
📊 Tool Result:
Updated task #7 status
[2026-01-24 12:51:13]
📊 Tool Result:
Updated task #8 status
[2026-01-24 12:51:17]
💭 Internal Reasoning (click to expand)
Now I need to create the test file. Let me first look at an existing test fixture to understand the format.
[2026-01-24 12:51:17]
🔧 Tool Use: Glob (ID: toolu_01QnPQFmW27BZooGqr311vb6)
{
"pattern": "tests/fixtures/blocks/*.toml"
}[2026-01-24 12:51:17]
📊 Tool Result:
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/blockquote_basic.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/blockquote_dynamic_nesting.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/blockquote_inline_formatting.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/blockquote_lazy.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/blockquote_nested.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/callout_all_types.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/callout_note.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/code_block.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/code_fence_in_list.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/code_fence_indented.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/heading.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/heading_inline_formatting.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/heading_setext_level1.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/heading_setext_level2.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/heading_setext_multiline.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/horizontal_rule_asterisks.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/horizontal_rule_basic.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/horizontal_rule_in_list.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/horizontal_rule_spaces.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/list.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/list_mixed.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/list_nested.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/list_ordered.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/paragraph.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/paragraph_hard_break.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/paragraph_hard_break_backslash.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/table_alignment.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/table_basic.toml
/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/table_inline_formatting.toml
[2026-01-24 12:51:20]
💭 Internal Reasoning (click to expand)
Let me read the code_block.toml test to understand the format.
[2026-01-24 12:51:21]
🔧 Tool Use: Read (ID: toolu_019mLyYRJAjDPVQwYHUoaAWo)
{
"file_path": "/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/code_block.toml"
}[2026-01-24 12:51:21]
📊 Tool Result:
1→name = "code-block-basic"
2→description = "Code block should accumulate and emit only after closing fence"
3→
4→[[chunks]]
5→input = "```"
6→emit = ""
7→
8→[[chunks]]
9→input = "rust"
10→emit = ""
11→
12→[[chunks]]
13→input = "\n"
14→emit = ""
15→
16→[[chunks]]
17→input = "fn main() {\n"
18→emit = ""
19→
20→[[chunks]]
21→input = " println!(\"Hello\");\n"
22→emit = ""
23→
24→[[chunks]]
25→input = "}\n"
26→emit = ""
27→
28→[[chunks]]
29→input = "```\n"
30→emit = " \u001b[38;2;180;142;173mfn\u001b[38;2;192;197;206m \u001b[38;2;143;161;179mmain\u001b[38;2;192;197;206m(\u001b[38;2;192;197;206m)\u001b[38;2;192;197;206m \u001b[38;2;192;197;206m{\u001b[38;2;192;197;206m\n \u001b[38;2;192;197;206m \u001b[38;2;192;197;206mprintln!\u001b[38;2;192;197;206m(\u001b[38;2;192;197;206m\"\u001b[38;2;163;190;140mHello\u001b[38;2;192;197;206m\"\u001b[38;2;192;197;206m)\u001b[38;2;192;197;206m;\u001b[38;2;192;197;206m\n \u001b[38;2;192;197;206m}\u001b[38;2;192;197;206m\n\u001b[0m\n"
31→
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>
[2026-01-24 12:51:26]
💭 Internal Reasoning (click to expand)
I see. The code block output includes syntax highlighting. For indented code blocks, there's no language specified so it should use plain text formatting. Let me also look at how plain text code blocks are formatted by looking at a test case without syntax highlighting.
Actually, let me run a quick test to see what the output looks like for indented code blocks with the current implementation.
[2026-01-24 12:51:27]
🔧 Tool Use: Bash (ID: toolu_01DsHu22YfoAVP28TqHotpfh)
{
"command": "printf \" line1\\n line2\\n\\ndone\\n\" | cargo run 2>&1 | cat -v",
"description": "Test indented code block rendering"
}[2026-01-24 12:51:28]
📊 Tool Result:
Exit code 2
error: unexpected argument '-v' found
tip: to pass '-v' as a value, use '-- -v'
Usage: bat [OPTIONS] [FILE]...
bat <COMMAND>
[2026-01-24 12:51:31]
💭 Internal Reasoning (click to expand)
Let me just run the test and see what output we get.
[2026-01-24 12:51:32]
🔧 Tool Use: Bash (ID: toolu_018PdbF6sPTuzK9c1LgNJr3T)
{
"command": "printf \" line1\\n line2\\n\\ndone\\n\" | cargo run 2>&1 | xxd | head -30",
"description": "Test indented code block rendering with hex dump"
}[2026-01-24 12:51:32]
📊 Tool Result:
00000000: 2020 2020 4669 6e69 7368 6564 2060 6465 Finished `de
00000010: 7660 2070 726f 6669 6c65 205b 756e 6f70 v` profile [unop
00000020: 7469 6d69 7a65 6420 2b20 6465 6275 6769 timized + debugi
00000030: 6e66 6f5d 2074 6172 6765 7428 7329 2069 nfo] target(s) i
00000040: 6e20 302e 3039 730a 2020 2020 2052 756e n 0.09s. Run
00000050: 6e69 6e67 2060 7461 7267 6574 2f64 6562 ning `target/deb
00000060: 7567 2f6d 6472 6976 6572 600a 2020 2020 ug/mdriver`.
00000070: 6c69 6e65 310a 2020 2020 6c69 6e65 320a line1. line2.
00000080: 0a64 6f6e 650a .done.
[2026-01-24 12:51:37]
💭 Internal Reasoning (click to expand)
Hmm, the output shows that the code block is being rendered but it's raw output - ` line1\n line2\n\ndone\n`. It looks like the indentation is preserved but it's not syntax highlighted. Actually, that's the expected behavior for plain text code blocks.
But wait - I notice that the format_code_block adds 4 spaces of indentation for display. Let me check what format_code_block does by grepping for it.
[2026-01-24 12:51:39]
🔧 Tool Use: Grep (ID: toolu_01PWJLu3GGnJe5fy9irmDBYA)
{
"pattern": "fn format_code_block",
"path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"output_mode": "content",
"-n": true,
"-A": 30
}[2026-01-24 12:51:39]
📊 Tool Result:
1295: fn format_code_block(&self, lines: &[String], info: &str) -> String {
1296- let mut output = String::new();
1297-
1298- // Map common aliases to their syntect language names
1299- let language = match info.to_lowercase().as_str() {
1300- "jsx" => "javascript",
1301- "tsx" => "typescript",
1302- _ => info,
1303- };
1304-
1305- // Try to find syntax definition for the language
1306- let syntax = self
1307- .syntax_set
1308- .find_syntax_by_token(language)
1309- .unwrap_or_else(|| self.syntax_set.find_syntax_plain_text());
1310-
1311- // Get theme from two-face's embedded themes, with fallback
1312- let theme = Self::theme_name_to_enum(&self.theme_name)
1313- .map(|name| self.theme_set.get(name))
1314- .unwrap_or_else(|| self.theme_set.get(EmbeddedThemeName::Base16OceanDark));
1315-
1316- let mut highlighter = HighlightLines::new(syntax, theme);
1317-
1318- // Process lines and collect highlighted output
1319- let mut highlighted_lines = Vec::new();
1320- for line in lines {
1321- // Add newline for proper syntax highlighting state management
1322- let line_with_newline = format!("{}\n", line);
1323- let ranges = highlighter
1324- .highlight_line(&line_with_newline, &self.syntax_set)
1325- .unwrap_or_default();
[2026-01-24 12:51:42]
💭 Internal Reasoning (click to expand)
Let me see more of this function to understand how code blocks are formatted.
[2026-01-24 12:51:43]
🔧 Tool Use: Read (ID: toolu_013j2hs25XHZnXbMDuizUCFK)
{
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"offset": 1295,
"limit": 50
}[2026-01-24 12:51:43]
📊 Tool Result:
1295→ fn format_code_block(&self, lines: &[String], info: &str) -> String {
1296→ let mut output = String::new();
1297→
1298→ // Map common aliases to their syntect language names
1299→ let language = match info.to_lowercase().as_str() {
1300→ "jsx" => "javascript",
1301→ "tsx" => "typescript",
1302→ _ => info,
1303→ };
1304→
1305→ // Try to find syntax definition for the language
1306→ let syntax = self
1307→ .syntax_set
1308→ .find_syntax_by_token(language)
1309→ .unwrap_or_else(|| self.syntax_set.find_syntax_plain_text());
1310→
1311→ // Get theme from two-face's embedded themes, with fallback
1312→ let theme = Self::theme_name_to_enum(&self.theme_name)
1313→ .map(|name| self.theme_set.get(name))
1314→ .unwrap_or_else(|| self.theme_set.get(EmbeddedThemeName::Base16OceanDark));
1315→
1316→ let mut highlighter = HighlightLines::new(syntax, theme);
1317→
1318→ // Process lines and collect highlighted output
1319→ let mut highlighted_lines = Vec::new();
1320→ for line in lines {
1321→ // Add newline for proper syntax highlighting state management
1322→ let line_with_newline = format!("{}\n", line);
1323→ let ranges = highlighter
1324→ .highlight_line(&line_with_newline, &self.syntax_set)
1325→ .unwrap_or_default();
1326→ let highlighted = as_24_bit_terminal_escaped(&ranges[..], false);
1327→ // Remove the trailing newline from highlighted output
1328→ let highlighted = highlighted.trim_end_matches('\n').to_string();
1329→ highlighted_lines.push(highlighted);
1330→ }
1331→
1332→ // Each line: 4 space indent + highlighted content (no background)
1333→ for highlighted in highlighted_lines.iter() {
1334→ output.push_str(" ");
1335→ output.push_str(highlighted);
1336→ output.push('\n');
1337→ }
1338→
1339→ // Reset ANSI codes to prevent color bleeding
1340→ output.push_str("\u{001b}[0m");
1341→
1342→ // Add blank line after code block for spacing
1343→ output.push('\n');
1344→ output
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>
[2026-01-24 12:51:50]
💭 Internal Reasoning (click to expand)
Good, I understand the format. Code blocks are displayed with 4-space indentation and use syntax highlighting (which for plain text is just the default colors). Now let me write the test file. The test file should test:
1. Basic indented code block
2. Blank lines preserved within code block
3. Trailing blank lines stripped
4. Extra indentation preserved (5+ spaces keeps 1+)
5. Tab indentation
For the expected output, I need to match what format_code_block produces. Since we use plain text syntax (no language specified), the output will have the theme's default color with 4-space indentation.
Let me run a simple test to see exactly what output to expect.
[2026-01-24 12:51:51]
🔧 Tool Use: Bash (ID: toolu_016joJjcmJTfB94Hvhb2jvHt)
{
"command": "printf \" line1\\n line2\\n\\n\" | cargo run 2>&1 | tail -10 | od -c | head -20",
"description": "Test indented code block output format"
}[2026-01-24 12:51:52]
📊 Tool Result:
0000000 F i n i s h e d ` d e
0000020 v ` p r o f i l e [ u n o p
0000040 t i m i z e d + d e b u g i
0000060 n f o ] t a r g e t ( s ) i
0000100 n 0 . 0 9 s \n R u n
0000120 n i n g ` t a r g e t / d e b
0000140 u g / m d r i v e r ` \n
0000160 l i n e 1 \n l i n e 2 \n
0000200 \n
0000201
[2026-01-24 12:51:55]
💭 Internal Reasoning (click to expand)
Hmm, there are no ANSI codes visible. Let me try a different approach - let me see what raw output we get (without any processing).
[2026-01-24 12:51:56]
🔧 Tool Use: Bash (ID: toolu_01LanNPQyuEovARd13geULqq)
{
"command": "printf \" line1\\n line2\\n\\n\" | cargo run --quiet 2>&1 | od -c",
"description": "Test indented code block output with od"
}[2026-01-24 12:51:57]
📊 Tool Result:
0000000 l i n e 1 \n l i
0000020 n e 2 \n \n
0000025
[2026-01-24 12:52:05]
💭 Internal Reasoning (click to expand)
Hmm, I see the output but it's missing the ANSI codes for syntax highlighting. Let me check if there's something wrong with how the code block is rendered. Actually, let me examine the output more carefully:
0000000 l i n e 1 \n l i
I see 4 spaces before "line1" and 4 spaces before "line2". That's correct - we strip the 4 leading spaces from input and then add them back in format_code_block.
But there are no ANSI codes. Let me check if the plain text syntax in syntect produces any highlighting.
Actually, looking more carefully at the output from `od -c`, I see:
- 4 spaces at start (that's the indentation from format_code_block)
- "line1\n"
- 4 spaces
- "line2\n"
- "\n" (the blank line after code block)
So the output does NOT have syntax highlighting when using plain text. That makes sense - plain text means no colors.
Wait, let me look at the test more carefully. The code_block.toml test shows that code blocks do have ANSI codes. Let me look at what a plain text code block looks like - perhaps we need a test fixture without syntax highlighting.
[2026-01-24 12:52:07]
🔧 Tool Use: Bash (ID: toolu_016Z7QCVVPGxtvUn8SE71krY)
{
"command": "printf '```\\nfoo\\nbar\\n```\\n\\n' | cargo run --quiet 2>&1 | od -c",
"description": "Test fenced code block with no language"
}[2026-01-24 12:52:08]
📊 Tool Result:
0000000 ` ` ` \n f o o \n b a r \n ` ` ` \n
0000020 \n
0000021
[2026-01-24 12:52:12]
💭 Internal Reasoning (click to expand)
Interesting - the output shows the raw markdown without any processing. Let me trace through this to understand what's happening. I think the issue is that we're parsing the code fence on the first chunk but not completing until all chunks are received.
Let me try feeding the complete block at once.
[2026-01-24 12:52:13]
🔧 Tool Use: Bash (ID: toolu_01A5yuVJ7p3LXQmUVEcL7PZ7)
{
"command": "printf '```\\nfoo\\nbar\\n```\\n' | cargo run --quiet 2>&1 | od -c",
"description": "Test fenced code block with end newline"
}[2026-01-24 12:52:13]
📊 Tool Result:
0000000 ` ` ` \n f o o \n b a r \n ` ` ` \n
0000020
[2026-01-24 12:52:18]
💭 Internal Reasoning (click to expand)
I see - the fenced code block is not being parsed correctly. Something's happening with the fence parsing. Let me check if the parser is working correctly.
Actually, let me look at the issue. When I run `printf '```\n...`, the output is the raw markdown. But when I did my earlier test with `printf " line1\n..."`, it DID output the expected format but with spaces.
Hmm. Let me trace through what's happening. The issue might be that the closing fence detection isn't working. Let me check the test output with a different approach.
[2026-01-24 12:52:19]
🔧 Tool Use: Bash (ID: toolu_01CV1AW7kkXTJkQL3v9GQSWx)
{
"command": "echo '```\nfoo\nbar\n```\n' | cargo run --quiet 2>&1 | od -c",
"description": "Test fenced code block using echo"
}[2026-01-24 12:52:19]
📊 Tool Result:
0000000 ` ` ` \n f o o \n b a r \n ` ` ` \n
0000020 \n
0000021
[2026-01-24 12:52:23]
💭 Internal Reasoning (click to expand)
Something is wrong. The code blocks aren't being rendered at all - they're being output as raw markdown. Let me test the indented code block again to confirm it works:
[2026-01-24 12:52:24]
🔧 Tool Use: Bash (ID: toolu_015qGxy9A7tovB5T8VTjLkRS)
{
"command": "echo ' code line\n another line\n\nparagraph' | cargo run --quiet 2>&1 | od -c",
"description": "Test indented code block followed by paragraph"
}[2026-01-24 12:52:25]
📊 Tool Result:
0000000 c o d e l i n e \n
0000020 a n o t h e r l i n e \n \n
0000040 p a r a g r a p h \n
0000052
[2026-01-24 12:52:31]
💭 Internal Reasoning (click to expand)
The indented code block is working. I can see:- 4 spaces, "code line\n"
- 4 spaces, "another line\n"
- "\n" (extra blank line from format_code_block)
- "paragraph\n" (paragraph with no trailing blank since it's flush at end)
So the indented code block feature is working. The fenced code block test failure is probably a different issue not related to my changes. Let me check if fenced code blocks were working before by running the existing tests.
[2026-01-24 12:52:33]
🔧 Tool Use: Bash (ID: toolu_01MpVUZCePAeXg7Vvewmcb8L)
{
"command": "cargo test test_block_fixtures -- --nocapture 2>&1 | tail -30",
"description": "Run block fixture tests"
}[2026-01-24 12:52:38]
📊 Tool Result:
✓ paragraph-basic
✓ list-ordered
✓ callout-all-types
✓ horizontal-rule-asterisks
✓ table-basic
✓ heading-setext-level1
✓ code-fence-indented
✓ table-inline-formatting
✓ blockquote-basic
✓ blockquote-dynamic-nesting
✓ heading-setext-multiline
✓ paragraph-hard-break
✓ list-mixed
✓ horizontal-rule-spaces
✓ blockquote-nested
✓ horizontal-rule-in-list
✓ list-nested
✓ code-block-basic
29 passed, 0 failed
test test_block_fixtures ... ok
test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 4 filtered out; finished in 1.08s
Running tests/unit.rs (target/debug/deps/unit-efcfe75070194326)
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 115 filtered out; finished in 0.00s
[2026-01-24 12:52:46]
💭 Internal Reasoning (click to expand)
Excellent! All existing block tests pass. The issue with my command line test might be related to how I'm testing - the test harness feeds chunks differently. Let me now create the test file for indented code blocks.
I need to figure out what the expected output format should be. Based on my earlier testing:
- Input: ` line1\n line2\n\n`
- Output: ` line1\n line2\n\n` (4 space indent preserved + reset code + blank line)
Actually wait, looking at the od output I got:
```0000000 c o d e l i n e \n```
That's 4 spaces, then "code line\n". So the formatting adds the 4 spaces back. But there were no ANSI codes in my test. Let me check if plain text syntax highlighting produces any output or if it's just the raw text.
Let me look at the code_fence_indented test to see what a code block with no language highlighting looks like:
[2026-01-24 12:52:47]
🔧 Tool Use: Read (ID: toolu_01CBabSjgPQUA2tAxz9JGBaa)
{
"file_path": "/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/code_fence_indented.toml"
}[2026-01-24 12:52:47]
📊 Tool Result:
1→name = "code-fence-indented"
2→description = "Code fences with 0-3 spaces of indentation should be recognized"
3→
4→[[chunks]]
5→input = " ```jsx\n"
6→emit = ""
7→
8→[[chunks]]
9→input = " let x = 1;\n"
10→emit = ""
11→
12→[[chunks]]
13→input = " ```\n"
14→emit = " \u001b[38;2;180;142;173mlet\u001b[38;2;192;197;206m \u001b[38;2;191;97;106mx\u001b[38;2;192;197;206m \u001b[38;2;192;197;206m=\u001b[38;2;192;197;206m \u001b[38;2;208;135;112m1\u001b[38;2;192;197;206m;\u001b[38;2;192;197;206m\n\u001b[0m\n"
15→
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>
[2026-01-24 12:52:51]
💭 Internal Reasoning (click to expand)
I see - this has jsx syntax highlighting. Let me look for a code block test without a language specified.Let me write a quick test to see what plain text output looks like through the test harness by creating the test file first and seeing what the actual output is.
Actually, let me use a simpler approach - let me write a simple Rust test inline to see what the formatter outputs:
[2026-01-24 12:52:53]
🔧 Tool Use: Bash (ID: toolu_01UfVaf5hbHmYzx1K1iATP5V)
{
"command": "cargo test --test conformance plain_text_test 2>&1 | tail -20 || true",
"description": "Check for plain text test"
}[2026-01-24 12:52:53]
📊 Tool Result:
Finished `test` profile [unoptimized + debuginfo] target(s) in 0.24s
Running tests/conformance.rs (target/debug/deps/conformance-8957b15b0b3cdff5)
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 5 filtered out; finished in 0.00s
[2026-01-24 12:52:56]
💭 Internal Reasoning (click to expand)
Let me write a simple test program to see what output format_code_block produces with empty info string:
[2026-01-24 12:52:57]
🔧 Tool Use: Bash (ID: toolu_01VvsW9qDoLg3xULgKBMNo6D)
{
"command": "cargo test --test conformance -- test_block_fixtures 2>&1 | head -20",
"description": "Check test output"
}[2026-01-24 12:52:59]
📊 Tool Result:
Finished `test` profile [unoptimized + debuginfo] target(s) in 0.09s
Running tests/conformance.rs (target/debug/deps/conformance-8957b15b0b3cdff5)
running 1 test
test test_block_fixtures ... ok
test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 4 filtered out; finished in 1.00s
[2026-01-24 12:53:05]
💭 Internal Reasoning (click to expand)
All tests pass! Now let me create a test file for indented code blocks. I need to know what the exact output should be. Let me look at how the test framework works to understand the expected output format.I'll create the test file with what I believe the output should be based on my understanding of format_code_block:
- For plain text (no syntax highlighting), the text is rendered with the theme's default colors
- Each line is prefixed with 4 spaces
- A reset code `\u001b[0m` is added at the end
- A blank line follows the code blockLet me write a quick test to see what plain text highlighting produces:
[2026-01-24 12:53:06]
🔧 Tool Use: Bash (ID: toolu_01UodPX3zwh7d5m1pDRTewCi)
{
"command": "cargo test --lib 2>&1 | head -10",
"description": "Run lib tests to ensure we can run code"
}[2026-01-24 12:53:07]
📊 Tool Result:
Finished `test` profile [unoptimized + debuginfo] target(s) in 0.09s
Running unittests src/lib.rs (target/debug/deps/mdriver-0a9ec812b5a0fdf4)
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[2026-01-24 12:53:14]
💭 Internal Reasoning (click to expand)
Let me look at what plain text syntax highlighting produces by examining the syntect documentation or by looking at how plain text is handled. Actually, let me just trace through the code:
1. `find_syntax_by_token("")` would fail to find a syntax
2. `unwrap_or_else(|| self.syntax_set.find_syntax_plain_text())` would get plain text
3. Plain text syntax produces styled output based on the theme's default foreground color
Looking at syntect's plain text handling, it should output the text with the default foreground color for the theme. For base16-ocean.dark, that would be some grayish color.
Let me check what color code the theme uses by looking at an existing test with very minimal syntax:
[2026-01-24 12:53:15]
🔧 Tool Use: Grep (ID: toolu_015DBkWHe4LsnDEWdKyrULpc)
{
"pattern": "38;2;192;197;206",
"path": "/Users/llimllib/code/mdriver/features/tests/fixtures",
"output_mode": "files_with_matches"
}[2026-01-24 12:53:15]
📊 Tool Result:
Found 5 files
tests/fixtures/complex/mixed_document.toml
tests/fixtures/streaming/block_boundaries.toml
tests/fixtures/blocks/code_fence_in_list.toml
tests/fixtures/blocks/code_fence_indented.toml
tests/fixtures/blocks/code_block.toml
[2026-01-24 12:53:22]
💭 Internal Reasoning (click to expand)
The color `38;2;192;197;206` appears to be the default foreground color (rgb 192, 197, 206 which is a light gray). Let me check by creating a simple test to see what happens with plain text.Actually, let me just write the test file with my best guess and run the test to see what the actual output should be. The test framework will show me the expected vs actual if they don't match.
[2026-01-24 12:53:26]
🔧 Tool Use: Write (ID: toolu_01HWxjR6QPk8ZA6cD5vUFG5i)
{
"file_path": "/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/indented_code.toml",
"content": "name = \"indented-code-basic\"\ndescription = \"Indented code blocks (4+ spaces) should be recognized and formatted\"\n\n# Test basic indented code block\n[[chunks]]\ninput = \" line1\\n\"\nemit = \"\"\n\n[[chunks]]\ninput = \" line2\\n\"\nemit = \"\"\n\n# Blank line terminates the code block\n[[chunks]]\ninput = \"\\n\"\nemit = \" \\u001b[38;2;192;197;206mline1\\u001b[38;2;192;197;206m\\n \\u001b[38;2;192;197;206mline2\\u001b[38;2;192;197;206m\\n\\u001b[0m\\n\"\n"
}[2026-01-24 12:53:26]
📊 Tool Result:
File created successfully at: /Users/llimllib/code/mdriver/features/tests/fixtures/blocks/indented_code.toml
[2026-01-24 12:53:31]
💭 Internal Reasoning (click to expand)
Now let me run the test to see what the actual output is:
[2026-01-24 12:53:32]
🔧 Tool Use: Bash (ID: toolu_01CDhygj9S7j8ts5CNPuZ8JH)
{
"command": "cargo test test_block_fixtures -- --nocapture 2>&1 | grep -A 20 \"indented-code-basic\"",
"description": "Run test to see actual vs expected output"
}[2026-01-24 12:53:33]
📊 Tool Result:
✗ indented-code-basic
Indented code blocks (4+ spaces) should be recognized and formatted
Chunk 3 failed:
Input: "\n"
Expected: " \u{1b}[38;2;192;197;206mline1\u{1b}[38;2;192;197;206m\n \u{1b}[38;2;192;197;206mline2\u{1b}[38;2;192;197;206m\n\u{1b}[0m\n"
Actual: ""
✓ list-nested
✓ code-block-basic
29 passed, 1 failed
thread 'test_block_fixtures' (35108376) panicked at tests/conformance.rs:90:38:
called `Result::unwrap()` on an `Err` value: "1 tests failed"
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
test test_block_fixtures ... FAILED
failures:
failures:
test_block_fixtures
[2026-01-24 12:53:54]
💭 Internal Reasoning (click to expand)
Interesting! The actual output is empty, meaning the indented code block isn't being emitted when a blank line is encountered. Let me check the handler again. Looking at my implementation:
```rust
fn handle_in_indented_code_block(&mut self, line: &str) -> Option<String> {
let trimmed = line.trim_end_matches('\n');
// Blank line - preserve in code block
if trimmed.is_empty() {
if let BlockBuilder::IndentedCodeBlock { lines } = &mut self.current_block {
lines.push(String::new());
}
return None;
}
...
}
Oh I see the problem! When a blank line is encountered, I'm preserving it in the code block (as a blank line within the code), not emitting the block. But according to the GFM spec, a non-blank line with fewer than 4 spaces terminates the block - but a blank line is PRESERVED within the code block!
Wait, but according to GFM spec section 4.4, an indented code block ends when there's a non-blank line that is not indented enough. A blank line is preserved. So actually my implementation is correct for the case of blank lines within the code block. However, what ends the code block is:
- A non-blank line with fewer than 4 spaces of indentation
- End of document (flush)
So the test case I wrote is wrong - a blank line should be preserved in the code block, not terminate it. Let me reread the GFM spec:
From the GFM spec:
Blank lines preceding or following an indented code block are not included in it
So blank lines at the start are ignored (they shouldn't start a code block) and blank lines at the end are not included. But in the middle, they are preserved.
Wait, but how does the code block end then? Let me re-read more carefully...
An indented code block consists of one or more indented chunks separated by blank lines. The block terminates when encountering a non-blank line that lacks sufficient indentation (fewer than four spaces) - blank lines themselves don't end it, they're part of the block. So my test case is flawed; the blank line should remain within the code block until a properly unindented line appears.
I also need to handle the document-end case where the code block should flush automatically when input ends.
</details>
---
**[2026-01-24 12:53:54]**
### 🤖 Assistant (claude-opus-4-5-20251101)
I see the issue. According to GFM spec, a blank line is preserved WITHIN an indented code block, not used to terminate it. The code block terminates when a non-blank, non-indented line is encountered. Let me update the test:
---
**[2026-01-24 12:53:57]**
### 🤖 Assistant (claude-opus-4-5-20251101)
🔧 **Tool Use: Write** (ID: toolu_01JPsTVZXxw22njT9b5pJvpi)
```json
{
"file_path": "/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/indented_code.toml",
"content": "name = \"indented-code-basic\"\ndescription = \"Indented code blocks (4+ spaces) should be recognized and formatted\"\n\n# Test basic indented code block\n[[chunks]]\ninput = \" line1\\n\"\nemit = \"\"\n\n[[chunks]]\ninput = \" line2\\n\"\nemit = \"\"\n\n# Non-indented line terminates the code block and starts paragraph\n[[chunks]]\ninput = \"done\\n\"\nemit = \" \\u001b[38;2;192;197;206mline1\\u001b[38;2;192;197;206m\\n \\u001b[38;2;192;197;206mline2\\u001b[38;2;192;197;206m\\n\\u001b[0m\\n\"\n\n# End of document - paragraph is flushed\n[[chunks]]\ninput = \"\\n\"\nemit = \"done\\n\\n\"\n"
}
[2026-01-24 12:53:57]
📊 Tool Result:
The file /Users/llimllib/code/mdriver/features/tests/fixtures/blocks/indented_code.toml has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
1→name = "indented-code-basic"
2→description = "Indented code blocks (4+ spaces) should be recognized and formatted"
3→
4→# Test basic indented code block
5→[[chunks]]
6→input = " line1\n"
7→emit = ""
8→
9→[[chunks]]
10→input = " line2\n"
11→emit = ""
12→
13→# Non-indented line terminates the code block and starts paragraph
14→[[chunks]]
15→input = "done\n"
16→emit = " \u001b[38;2;192;197;206mline1\u001b[38;2;192;197;206m\n \u001b[38;2;192;197;206mline2\u001b[38;2;192;197;206m\n\u001b[0m\n"
17→
18→# End of document - paragraph is flushed
19→[[chunks]]
20→input = "\n"
21→emit = "done\n\n"
22→
[2026-01-24 12:54:00]
💭 Internal Reasoning (click to expand)
Now let me run the test to see if the output matches:
[2026-01-24 12:54:01]
🔧 Tool Use: Bash (ID: toolu_01LnnTXVXF1Dx3vATnPPkW81)
{
"command": "cargo test test_block_fixtures -- --nocapture 2>&1 | grep -A 20 \"indented-code-basic\"",
"description": "Run test to check output"
}[2026-01-24 12:54:02]
📊 Tool Result:
✗ indented-code-basic
Indented code blocks (4+ spaces) should be recognized and formatted
Chunk 3 failed:
Input: "done\n"
Expected: " \u{1b}[38;2;192;197;206mline1\u{1b}[38;2;192;197;206m\n \u{1b}[38;2;192;197;206mline2\u{1b}[38;2;192;197;206m\n\u{1b}[0m\n"
Actual: " \u{1b}[38;2;192;197;206mline1\n \u{1b}[38;2;192;197;206mline2\n\u{1b}[0m\n"
✓ list-nested
✓ code-block-basic
29 passed, 1 failed
thread 'test_block_fixtures' (35109502) panicked at tests/conformance.rs:90:38:
called `Result::unwrap()` on an `Err` value: "1 tests failed"
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
test test_block_fixtures ... FAILED
failures:
failures:
test_block_fixtures
[2026-01-24 12:54:08]
💭 Internal Reasoning (click to expand)
Good progress! The actual output is simpler than I expected:- Actual: ` \u{1b}[38;2;192;197;206mline1\n \u{1b}[38;2;192;197;206mline2\n\u{1b}[0m\n`
So the format is:- 4 spaces- ANSI color code- line content (including the newline)
- (repeat for each line)- ANSI reset- newline
Let me update the test with the correct expected output:
[2026-01-24 12:54:11]
🔧 Tool Use: Write (ID: toolu_01JE9Sm8bDyDST3CrWLY1DdQ)
{
"file_path": "/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/indented_code.toml",
"content": "name = \"indented-code-basic\"\ndescription = \"Indented code blocks (4+ spaces) should be recognized and formatted\"\n\n# Test basic indented code block\n[[chunks]]\ninput = \" line1\\n\"\nemit = \"\"\n\n[[chunks]]\ninput = \" line2\\n\"\nemit = \"\"\n\n# Non-indented line terminates the code block and starts paragraph\n[[chunks]]\ninput = \"done\\n\"\nemit = \" \\u001b[38;2;192;197;206mline1\\n \\u001b[38;2;192;197;206mline2\\n\\u001b[0m\\n\"\n\n# End of document - paragraph is flushed\n[[chunks]]\ninput = \"\\n\"\nemit = \"done\\n\\n\"\n"
}[2026-01-24 12:54:11]
📊 Tool Result:
The file /Users/llimllib/code/mdriver/features/tests/fixtures/blocks/indented_code.toml has been updated. Here's the result of running `cat -n` on a snippet of the edited file:
1→name = "indented-code-basic"
2→description = "Indented code blocks (4+ spaces) should be recognized and formatted"
3→
4→# Test basic indented code block
5→[[chunks]]
6→input = " line1\n"
7→emit = ""
8→
9→[[chunks]]
10→input = " line2\n"
11→emit = ""
12→
13→# Non-indented line terminates the code block and starts paragraph
14→[[chunks]]
15→input = "done\n"
16→emit = " \u001b[38;2;192;197;206mline1\n \u001b[38;2;192;197;206mline2\n\u001b[0m\n"
17→
18→# End of document - paragraph is flushed
19→[[chunks]]
20→input = "\n"
21→emit = "done\n\n"
22→
[2026-01-24 12:54:14]
💭 Internal Reasoning (click to expand)
Now let me run the test:
[2026-01-24 12:54:15]
🔧 Tool Use: Bash (ID: toolu_01SriDVfY1T9D1RHXrHNnSqi)
{
"command": "cargo test test_block_fixtures -- --nocapture 2>&1 | grep -A 5 \"indented-code-basic\"",
"description": "Run test to verify"
}[2026-01-24 12:54:16]
📊 Tool Result:
✓ indented-code-basic
✓ list-nested
✓ code-block-basic
30 passed, 0 failed
test test_block_fixtures ... ok
[2026-01-24 12:54:22]
💭 Internal Reasoning (click to expand)
The basic test passes. Now let me add more test cases for:
1. Blank lines preserved within code block
2. Trailing blank lines stripped
3. Extra indentation preserved (5+ spaces keeps 1+)
4. Tab indentation
I'll create separate test files for each case to keep them organized:
[2026-01-24 12:54:22]
Let me add more test files for the other cases:
[2026-01-24 12:54:25]
🔧 Tool Use: Write (ID: toolu_01Dcj51jx6WszMg1yofqrVpw)
{
"file_path": "/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/indented_code_blank_lines.toml",
"content": "name = \"indented-code-blank-lines\"\ndescription = \"Blank lines within indented code blocks should be preserved\"\n\n[[chunks]]\ninput = \" line1\\n\"\nemit = \"\"\n\n[[chunks]]\ninput = \"\\n\"\nemit = \"\"\n\n[[chunks]]\ninput = \" line2\\n\"\nemit = \"\"\n\n# Non-indented line terminates the code block\n[[chunks]]\ninput = \"done\\n\"\nemit = \" \\u001b[38;2;192;197;206mline1\\n \\u001b[38;2;192;197;206m\\n \\u001b[38;2;192;197;206mline2\\n\\u001b[0m\\n\"\n\n# Flush the paragraph\n[[chunks]]\ninput = \"\\n\"\nemit = \"done\\n\\n\"\n"
}[2026-01-24 12:54:25]
📊 Tool Result:
File created successfully at: /Users/llimllib/code/mdriver/features/tests/fixtures/blocks/indented_code_blank_lines.toml
[2026-01-24 12:54:28]
💭 Internal Reasoning (click to expand)
Let me run this test to see if blank lines are preserved correctly:
[2026-01-24 12:54:29]
🔧 Tool Use: Bash (ID: toolu_01T6ZUdVDmvDnojLRhpfiz28)
{
"command": "cargo test test_block_fixtures -- --nocapture 2>&1 | grep -A 10 \"indented-code-blank-lines\"",
"description": "Run blank lines test"
}[2026-01-24 12:54:30]
📊 Tool Result:
✓ indented-code-blank-lines
✓ heading-setext-multiline
✓ paragraph-hard-break
✓ list-mixed
✓ horizontal-rule-spaces
✓ blockquote-nested
✓ horizontal-rule-in-list
✓ indented-code-basic
✓ list-nested
✓ code-block-basic
[2026-01-24 12:54:33]
💭 Internal Reasoning (click to expand)
Now let me add a test for trailing blank lines being stripped:
[2026-01-24 12:54:36]
🔧 Tool Use: Write (ID: toolu_01Y7RfeJno6gDBYB3WHTBFwa)
{
"file_path": "/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/indented_code_trailing_blank.toml",
"content": "name = \"indented-code-trailing-blank\"\ndescription = \"Trailing blank lines in indented code blocks should be stripped\"\n\n[[chunks]]\ninput = \" line1\\n\"\nemit = \"\"\n\n[[chunks]]\ninput = \" line2\\n\"\nemit = \"\"\n\n[[chunks]]\ninput = \"\\n\"\nemit = \"\"\n\n[[chunks]]\ninput = \"\\n\"\nemit = \"\"\n\n# Non-indented line terminates - trailing blanks should be stripped\n[[chunks]]\ninput = \"done\\n\"\nemit = \" \\u001b[38;2;192;197;206mline1\\n \\u001b[38;2;192;197;206mline2\\n\\u001b[0m\\n\"\n\n[[chunks]]\ninput = \"\\n\"\nemit = \"done\\n\\n\"\n"
}[2026-01-24 12:54:36]
📊 Tool Result:
File created successfully at: /Users/llimllib/code/mdriver/features/tests/fixtures/blocks/indented_code_trailing_blank.toml
[2026-01-24 12:54:40]
💭 Internal Reasoning (click to expand)
Let me run this test:
[2026-01-24 12:54:41]
🔧 Tool Use: Bash (ID: toolu_018bR5EGVHDHEQnhtihvEPRr)
{
"command": "cargo test test_block_fixtures -- --nocapture 2>&1 | grep -A 10 \"indented-code-trailing-blank\"",
"description": "Run trailing blank test"
}[2026-01-24 12:54:42]
📊 Tool Result:
✓ indented-code-trailing-blank
✓ heading-setext-level2
✓ horizontal-rule-basic
✓ heading-basic
✓ paragraph-hard-break-backslash
✓ blockquote-inline-formatting
✓ paragraph-basic
✓ list-ordered
✓ callout-all-types
✓ horizontal-rule-asterisks
✓ table-basic
[2026-01-24 12:54:47]
💭 Internal Reasoning (click to expand)
Now let me add a test for extra indentation (5+ spaces preserves the extra):
[2026-01-24 12:54:50]
🔧 Tool Use: Write (ID: toolu_01GK8QF2XyXnpRZMK831jkVw)
{
"file_path": "/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/indented_code_extra_indent.toml",
"content": "name = \"indented-code-extra-indent\"\ndescription = \"Extra indentation (5+ spaces) preserves the extra spaces\"\n\n[[chunks]]\ninput = \" line1\\n\"\nemit = \"\"\n\n# 5 spaces = 1 extra space preserved\n[[chunks]]\ninput = \" indented\\n\"\nemit = \"\"\n\n# 8 spaces = 4 extra spaces preserved\n[[chunks]]\ninput = \" double\\n\"\nemit = \"\"\n\n[[chunks]]\ninput = \"done\\n\"\nemit = \" \\u001b[38;2;192;197;206mline1\\n \\u001b[38;2;192;197;206m indented\\n \\u001b[38;2;192;197;206m double\\n\\u001b[0m\\n\"\n\n[[chunks]]\ninput = \"\\n\"\nemit = \"done\\n\\n\"\n"
}[2026-01-24 12:54:50]
📊 Tool Result:
File created successfully at: /Users/llimllib/code/mdriver/features/tests/fixtures/blocks/indented_code_extra_indent.toml
[2026-01-24 12:54:54]
💭 Internal Reasoning (click to expand)
Let me test this:
[2026-01-24 12:54:54]
🔧 Tool Use: Bash (ID: toolu_0126ErEu2W5oiqGGQmW3sprt)
{
"command": "cargo test test_block_fixtures -- --nocapture 2>&1 | grep -A 10 \"indented-code-extra-indent\"",
"description": "Run extra indent test"
}[2026-01-24 12:54:56]
📊 Tool Result:
✓ indented-code-extra-indent
✓ paragraph-hard-break-backslash
✓ blockquote-inline-formatting
✓ paragraph-basic
✓ list-ordered
✓ callout-all-types
✓ horizontal-rule-asterisks
✓ table-basic
✓ heading-setext-level1
✓ code-fence-indented
✓ table-inline-formatting
[2026-01-24 12:54:59]
💭 Internal Reasoning (click to expand)
Now let me add a test for tab indentation:
[2026-01-24 12:55:01]
🔧 Tool Use: Write (ID: toolu_01PEG5Lo5rvuBNGdEGuhLF9G)
{
"file_path": "/Users/llimllib/code/mdriver/features/tests/fixtures/blocks/indented_code_tab.toml",
"content": "name = \"indented-code-tab\"\ndescription = \"Tab-indented code blocks should be recognized\"\n\n[[chunks]]\ninput = \"\\tline1\\n\"\nemit = \"\"\n\n[[chunks]]\ninput = \"\\tline2\\n\"\nemit = \"\"\n\n[[chunks]]\ninput = \"done\\n\"\nemit = \" \\u001b[38;2;192;197;206mline1\\n \\u001b[38;2;192;197;206mline2\\n\\u001b[0m\\n\"\n\n[[chunks]]\ninput = \"\\n\"\nemit = \"done\\n\\n\"\n"
}[2026-01-24 12:55:01]
📊 Tool Result:
File created successfully at: /Users/llimllib/code/mdriver/features/tests/fixtures/blocks/indented_code_tab.toml
[2026-01-24 12:55:04]
💭 Internal Reasoning (click to expand)
Let me run this test:
[2026-01-24 12:55:05]
🔧 Tool Use: Bash (ID: toolu_01KJvf88vb4n65m6jytuMWAU)
{
"command": "cargo test test_block_fixtures -- --nocapture 2>&1 | grep -A 10 \"indented-code-tab\"",
"description": "Run tab indent test"
}[2026-01-24 12:55:06]
📊 Tool Result:
✓ indented-code-tab
✓ code-fence-in-list
✓ heading-inline-formatting
✓ list-basic
✓ callout-note
✓ indented-code-trailing-blank
✓ heading-setext-level2
✓ horizontal-rule-basic
✓ heading-basic
✓ indented-code-extra-indent
✓ paragraph-hard-break-backslash
[2026-01-24 12:55:11]
💭 Internal Reasoning (click to expand)
All test cases pass. Now let me update task 8 as completed and run the full verification in task 9:
[2026-01-24 12:55:11]
🔧 Tool Use: TaskUpdate (ID: toolu_015JgVYYWdqZL6fJHdtdXSh7)
{
"taskId": "8",
"status": "completed"
}[2026-01-24 12:55:11]
🔧 Tool Use: TaskUpdate (ID: toolu_01H6btq8zrdGdgoYmeDGumA3)
{
"taskId": "9",
"status": "in_progress"
}[2026-01-24 12:55:11]
📊 Tool Result:
Updated task #8 status
[2026-01-24 12:55:11]
📊 Tool Result:
Updated task #9 status
[2026-01-24 12:55:14]
💭 Internal Reasoning (click to expand)
Now let me run the full verification commands: cargo fmt, cargo build, cargo clippy, and cargo test.
[2026-01-24 12:55:14]
🔧 Tool Use: Bash (ID: toolu_01C9PJMASexQ3ta55WmYAhsB)
{
"command": "cargo fmt",
"description": "Format code"
}[2026-01-24 12:55:15]
📊 Tool Result:
[2026-01-24 12:55:18]
💭 Internal Reasoning (click to expand)
Good. Now let me run build:
[2026-01-24 12:55:18]
🔧 Tool Use: Bash (ID: toolu_01RTfrWHnN5QpLY7mSHPXZVE)
{
"command": "cargo build 2>&1",
"description": "Build the project"
}[2026-01-24 12:55:19]
📊 Tool Result:
Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.25s
[2026-01-24 12:55:22]
💭 Internal Reasoning (click to expand)
Good. Now clippy:
[2026-01-24 12:55:22]
🔧 Tool Use: Bash (ID: toolu_01PyJ3EnTzHCbxvuc8bMp9TP)
{
"command": "cargo clippy --all-targets --all-features -- -D warnings 2>&1",
"description": "Run clippy linter"
}[2026-01-24 12:55:24]
📊 Tool Result:
Exit code 101
Compiling mdriver v0.12.0 (/Users/llimllib/code/mdriver/features)
error: stripping a prefix manually
--> src/lib.rs:894:18
|
894 | Some(&line[4..])
| ^^^^^^^^^^
|
note: the prefix was tested here
--> src/lib.rs:893:9
|
893 | if line.starts_with(" ") {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
= help: for further information visit https://rust-lang.github.io/rust-clippy/rust-1.92.0/index.html#manual_strip
= note: `-D clippy::manual-strip` implied by `-D warnings`
= help: to override `-D warnings` add `#[allow(clippy::manual_strip)]`
help: try using the `strip_prefix` method
|
893 ~ if let Some(<stripped>) = line.strip_prefix(" ") {
894 ~ Some(<stripped>)
|
error: stripping a prefix manually
--> src/lib.rs:896:18
|
896 | Some(&line[1..])
| ^^^^^^^^^^
|
note: the prefix was tested here
--> src/lib.rs:895:16
|
895 | } else if line.starts_with('\t') {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
= help: for further information visit https://rust-lang.github.io/rust-clippy/rust-1.92.0/index.html#manual_strip
help: try using the `strip_prefix` method
|
895 ~ } else if let Some(<stripped>) = line.strip_prefix('\t') {
896 ~ Some(<stripped>)
|
error: could not compile `mdriver` (lib) due to 2 previous errors
warning: build failed, waiting for other jobs to finish...
error: could not compile `mdriver` (lib test) due to 2 previous errors
[2026-01-24 12:55:30]
💭 Internal Reasoning (click to expand)
Clippy is flagging my manual prefix stripping. I need to use `strip_prefix` instead. Let me fix this:
[2026-01-24 12:55:30]
🔧 Tool Use: Read (ID: toolu_01MkEPoy4HB9yGGkpMJgNqzu)
{
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"offset": 888,
"limit": 15
}[2026-01-24 12:55:31]
📊 Tool Result:
888→ !inner.contains("-->")
889→ }
890→
891→ /// Check if a line is indented code (4+ spaces or tab), return content with indentation stripped
892→ fn is_indented_code_line<'a>(&self, line: &'a str) -> Option<&'a str> {
893→ if line.starts_with(" ") {
894→ Some(&line[4..])
895→ } else if line.starts_with('\t') {
896→ Some(&line[1..])
897→ } else {
898→ None
899→ }
900→ }
901→
902→ fn is_horizontal_rule(&self, line: &str) -> bool {
<system-reminder>
Whenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.
</system-reminder>
[2026-01-24 12:55:34]
💭 Internal Reasoning (click to expand)
Now let me fix the function to use strip_prefix:
[2026-01-24 12:55:38]
🔧 Tool Use: Edit (ID: toolu_01JeuRFwajLLkEjXJBVANKns)
{
"replace_all": false,
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"old_string": " /// Check if a line is indented code (4+ spaces or tab), return content with indentation stripped\n fn is_indented_code_line<'a>(&self, line: &'a str) -> Option<&'a str> {\n if line.starts_with(\" \") {\n Some(&line[4..])\n } else if line.starts_with('\\t') {\n Some(&line[1..])\n } else {\n None\n }\n }",
"new_string": " /// Check if a line is indented code (4+ spaces or tab), return content with indentation stripped\n fn is_indented_code_line<'a>(&self, line: &'a str) -> Option<&'a str> {\n if let Some(stripped) = line.strip_prefix(\" \") {\n Some(stripped)\n } else if let Some(stripped) = line.strip_prefix('\\t') {\n Some(stripped)\n } else {\n None\n }\n }"
}[2026-01-24 12:55:38]
📊 Tool Result:
The file /Users/llimllib/code/mdriver/features/src/lib.rs has been updated successfully.
[2026-01-24 12:55:41]
💭 Internal Reasoning (click to expand)
Actually, I can simplify this further using `or_else`:
[2026-01-24 12:55:43]
🔧 Tool Use: Edit (ID: toolu_011s4PyjaMQbTEzYEknCpAwm)
{
"replace_all": false,
"file_path": "/Users/llimllib/code/mdriver/features/src/lib.rs",
"old_string": " /// Check if a line is indented code (4+ spaces or tab), return content with indentation stripped\n fn is_indented_code_line<'a>(&self, line: &'a str) -> Option<&'a str> {\n if let Some(stripped) = line.strip_prefix(\" \") {\n Some(stripped)\n } else if let Some(stripped) = line.strip_prefix('\\t') {\n Some(stripped)\n } else {\n None\n }\n }",
"new_string": " /// Check if a line is indented code (4+ spaces or tab), return content with indentation stripped\n fn is_indented_code_line<'a>(&self, line: &'a str) -> Option<&'a str> {\n line.strip_prefix(\" \").or_else(|| line.strip_prefix('\\t'))\n }"
}[2026-01-24 12:55:44]
📊 Tool Result:
The file /Users/llimllib/code/mdriver/features/src/lib.rs has been updated successfully.
[2026-01-24 12:55:47]
💭 Internal Reasoning (click to expand)
Now let me run clippy again:
[2026-01-24 12:55:48]
🔧 Tool Use: Bash (ID: toolu_01Lu8gY3QiqZJKzigrhyEuUy)
{
"command": "cargo clippy --all-targets --all-features -- -D warnings 2>&1",
"description": "Run clippy linter"
}[2026-01-24 12:55:49]
📊 Tool Result:
Checking mdriver v0.12.0 (/Users/llimllib/code/mdriver/features)
Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.74s
[2026-01-24 12:55:53]
💭 Internal Reasoning (click to expand)
Clippy passes. Now let me run the full test suite:
[2026-01-24 12:55:53]
🔧 Tool Use: Bash (ID: toolu_01Ta6bpKsyPGHTMz2doLmvbc)
{
"command": "cargo test 2>&1",
"description": "Run all tests"
}[2026-01-24 12:55:57]
📊 Tool Result:
Compiling mdriver v0.12.0 (/Users/llimllib/code/mdriver/features)
Finished `test` profile [unoptimized + debuginfo] target(s) in 1.89s
Running unittests src/lib.rs (target/debug/deps/mdriver-0a9ec812b5a0fdf4)
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
Running unittests src/main.rs (target/debug/deps/mdriver-9bb45dce2f37b156)
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
Running tests/conformance.rs (target/debug/deps/conformance-8957b15b0b3cdff5)
running 5 tests
test test_complex_fixtures ... ok
test test_streaming_fixtures ... ok
test test_wrapping_fixtures ... ok
test test_ansi_fixtures ... ok
test test_block_fixtures ... ok
test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.15s
Running tests/unit.rs (target/debug/deps/unit-efcfe75070194326)
running 115 tests
test extract_href::test_single_quoted_href ... ok
test html_entities::test_ampersand_alone ... ok
test extract_href::test_href_with_spaces ... ok
test html_comments::test_comment_between_blocks ... ok
test html_comments::test_comment_line_stripped ... ok
test extract_href::test_double_quoted_href ... ok
test html_comments::test_inline_comment_stripped ... ok
test extract_href::test_href_case_insensitive ... ok
test html_entities::test_amp_entity ... ok
test extract_href::test_no_href ... ok
test html_entities::test_ampersand_at_end ... ok
test html_entities::test_deg_entity ... ok
test html_entities::test_bull_entity ... ok
test html_entities::test_curly_quotes ... ok
test html_entities::test_apos_entity ... ok
test html_entities::test_entity_with_bold ... ok
test html_entities::test_arrow_entities ... ok
test html_entities::test_currency_entities ... ok
test html_entities::test_copy_entity ... ok
test html_entities::test_entity_without_semicolon ... ok
test html_entities::test_gt_entity ... ok
test html_entities::test_hellip_entity ... ok
test html_entities::test_fraction_entities ... ok
test html_entities::test_multiple_entities ... ok
test html_entities::test_lt_entity ... ok
test html_entities::test_mdash_entity ... ok
test html_entities::test_nbsp_entity ... ok
test html_entities::test_math_entities ... ok
test html_entities::test_ndash_entity ... ok
test html_entities::test_numeric_decimal_entity ... ok
test html_entities::test_numeric_hex_uppercase ... ok
test html_entities::test_quot_entity ... ok
test html_entities::test_numeric_hex_entity ... ok
test html_entities::test_trade_entity ... ok
test html_tags::test_anchor_tag_single_quotes ... ok
test html_tags::test_anchor_tag_no_href ... ok
test html_entities::test_reg_entity ... ok
test html_entities::test_unknown_entity_preserved ... ok
test html_tags::test_b_tag ... ok
test html_tags::test_anchor_tag_with_href ... ok
test html_tags::test_case_insensitive_tags ... ok
test html_tags::test_code_tag ... ok
test html_tags::test_del_tag ... ok
test html_tags::test_em_tag ... ok
test html_tags::test_i_tag ... ok
test html_tags::test_less_than_not_tag ... ok
test html_tags::test_html_mixed_with_markdown ... ok
test html_tags::test_nested_tags ... ok
test html_tags::test_pre_tag ... ok
test html_tags::test_s_tag ... ok
test html_tags::test_self_closing_br ... ok
test html_tags::test_tag_with_attributes ... ok
test html_tags::test_u_tag ... ok
test html_tags::test_strike_tag ... ok
test html_tags::test_unclosed_tag_preserved ... ok
test html_tags::test_strong_tag ... ok
test html_tags::test_unknown_tag_stripped ... ok
test image_inside_link::test_bold_inside_link ... ok
test image_inside_link::test_code_inside_link ... ok
test image_inside_link::test_html_img_inside_link_with_attributes ... ok
test image_inside_link::test_html_img_inside_link ... ok
test image_inside_link::test_markdown_image_inside_link ... ok
test image_inside_link::test_text_and_img_inside_link ... ok
test img_tag::test_img_case_insensitive_attrs ... ok
test img_tag::test_img_case_insensitive_tag ... ok
test img_tag::test_img_inline_with_text ... ok
test img_tag::test_img_inside_div ... ok
test img_tag::test_img_self_closing_no_space ... ok
test img_tag::test_img_no_src_returns_empty ... ok
test img_tag::test_img_self_closing_with_space ... ok
test img_tag::test_img_single_quoted_attrs ... ok
test img_tag::test_img_void_element ... ok
test img_tag::test_img_with_alt ... ok
test img_tag::test_img_with_alt_void_element ... ok
test img_tag::test_multiple_img_tags ... ok
test markdown_image_tests::test_image_with_spaces_in_alt ... ok
test img_tag::test_img_with_other_attrs ... ok
test img_tag::test_img_with_local_path ... ok
test markdown_image_tests::test_simple_image ... ok
test reference_links::test_bibliography_at_flush ... ok
test reference_links::test_case_insensitive_label ... ok
test reference_links::test_angle_bracketed_url ... ok
test reference_links::test_citation_style_unresolved ... ok
test reference_links::test_defini
... (truncated, 2148 chars omitted)
[2026-01-24 12:56:01]
💭 Internal Reasoning (click to expand)
All tests pass. Let me also run a quick manual test to make sure the feature works as expected:
[2026-01-24 12:56:02]
🔧 Tool Use: Bash (ID: toolu_01JDCJ4dEnS62YR5iZ2y33Dz)
{
"command": "echo ' line1\n line2\n\ndone' | cargo run --quiet 2>&1",
"description": "Manual test of indented code block"
}[2026-01-24 12:56:03]
📊 Tool Result:
line1
line2
done
[2026-01-24 12:56:07]
💭 Internal Reasoning (click to expand)
The manual test also works. Now let me update task 9 as completed:
[2026-01-24 12:56:08]
🔧 Tool Use: TaskUpdate (ID: toolu_01VHG96xptJtmYyGkABUna5c)
{
"taskId": "9",
"status": "completed"
}[2026-01-24 12:56:08]
📊 Tool Result:
Updated task #9 status
[2026-01-24 12:56:11]
💭 Internal Reasoning (click to expand)
All tasks are complete. Let me list the tasks to confirm:
[2026-01-24 12:56:11]
🔧 Tool Use: TaskList (ID: toolu_0167soBdpvEV4kDTUyL1s9HK)
{}[2026-01-24 12:56:11]
📊 Tool Result:
#6 [completed] Implement handle_in_indented_code_block handler
#7 [completed] Add IndentedCodeBlock case to emit_current_block
#1 [completed] Add InIndentedCodeBlock variant to ParserState
#2 [completed] Add IndentedCodeBlock variant to BlockBuilder
#3 [completed] Add is_indented_code_line helper function
#8 [completed] Create test file for indented code blocks
#4 [completed] Add indented code detection to handle_ready_state
#5 [completed] Add dispatch in process_line for InIndentedCodeBlock
#9 [completed] Run verification commands
[2026-01-24 12:56:14]
💭 Internal Reasoning (click to expand)
All tasks are completed. Let me provide a summary of the implementation.
[2026-01-24 12:56:25]
Implementation complete. Here's a summary of the changes:
src/lib.rs:
- Added
InIndentedCodeBlockvariant toParserStateenum (line 143) - Added
IndentedCodeBlock { lines: Vec<String> }variant toBlockBuilderenum (line 170) - Added helper function
is_indented_code_lineusingstrip_prefixto detect 4-space or tab indentation (line 891) - Added dispatch case in
process_lineforInIndentedCodeBlockstate (line 443) - Added detection in
handle_ready_stateafter link definitions, before paragraph fallback (lines 518-524) - Added
handle_in_indented_code_blockhandler that:- Preserves blank lines within the code block
- Accumulates indented lines
- Emits block when non-indented, non-blank line is encountered
- Chains to
handle_ready_statefor the terminating line
- Added
IndentedCodeBlockcase inemit_current_blockthat strips trailing blank lines and usesformat_code_blockwith empty language (lines 1186-1192) - Added
IndentedCodeBlockcase inextract_block_text(line 1221)
Test Files Created:
tests/fixtures/blocks/indented_code.toml- Basic indented code block testtests/fixtures/blocks/indented_code_blank_lines.toml- Blank lines preserved within code blocktests/fixtures/blocks/indented_code_trailing_blank.toml- Trailing blank lines strippedtests/fixtures/blocks/indented_code_extra_indent.toml- Extra indentation preservedtests/fixtures/blocks/indented_code_tab.toml- Tab indentation support
Verification:
cargo fmt- Passedcargo build- Passedcargo clippy --all-targets --all-features -- -D warnings- Passedcargo test- All 120 tests pass (115 unit + 5 conformance test categories with 34 block fixtures)
[2026-01-24 13:00:46]
create a file "deleteme.md" which contains a couple examples of indented code blocks for me to test with
[2026-01-24 13:00:50]
💭 Internal Reasoning (click to expand)
The user wants me to create a test file with examples of indented code blocks that they can use for manual testing.
[2026-01-24 13:00:54]
🔧 Tool Use: Write (ID: toolu_019jdqam3TYwKkdVzRKMHHc8)
{
"file_path": "/Users/llimllib/code/mdriver/features/deleteme.md",
"content": "# Indented Code Block Examples\n\nHere is a basic indented code block:\n\n function hello() {\n console.log(\"Hello, world!\");\n }\n\nAnd here is one with blank lines preserved inside:\n\n line 1\n\n line 3 (line 2 was blank)\n line 4\n\nHere is one with extra indentation (8 spaces = 4 stripped + 4 preserved):\n\n outer\n inner\n deeper\n\nTab-indented code block:\n\n\ttab line 1\n\ttab line 2\n\nBack to normal paragraph text.\n"
}[2026-01-24 13:00:54]
📊 Tool Result:
File created successfully at: /Users/llimllib/code/mdriver/features/deleteme.md
[2026-01-24 13:00:58]
💭 Internal Reasoning (click to expand)
I created the file with several examples of indented code blocks for testing. The user can now test it with:
cat deleteme.md | cargo run
[2026-01-24 13:00:59]
Created deleteme.md with several examples. You can test with:
cat deleteme.md | cargo run[2026-01-24 13:02:17]
I haven't read the spec - am I correct that there's no way to indicate language for syntax highlighting on indented blocks like there is on fenced code blocks?
[2026-01-24 13:02:20]
💭 Internal Reasoning (click to expand)
The user is asking about whether indented code blocks can have language specification for syntax highlighting. Let me check the GFM spec to confirm this.
[2026-01-24 13:02:24]
That's correct. According to the GFM spec (section 4.4), indented code blocks have no mechanism for specifying a language - they're just literal text with 4 spaces stripped.
Only fenced code blocks support the "info string" after the opening fence:
# This can have syntax highlightingvs:
# This is always plain text, no language info possible
This is one reason fenced code blocks are generally preferred in modern markdown - they support syntax highlighting and are visually clearer about where they start and end.
[2026-01-24 13:03:10]
ok, commit this. I added it to the stage already. Then file a PR and include a transcript as per your instructions
[2026-01-24 13:03:15]
💭 Internal Reasoning (click to expand)
The user wants me to commit the staged changes and create a PR with a transcript. Let me follow the git commit workflow from the instructions.
First, I need to:
1. Run git status to see staged changes
2. Run git diff to see what's staged
3. Run git log to see recent commit message style
4. Create the commit
5. Push and create PR
6. Export the session and create a gist
[2026-01-24 13:03:16]
🔧 Tool Use: Bash (ID: toolu_01PhaePYi25mk8Q64TeoHC7r)
{
"command": "git status",
"description": "Check staged changes"
}[2026-01-24 13:03:17]
🔧 Tool Use: Bash (ID: toolu_01Jhhjbw2grj12CTBS5DHCK6)
{
"command": "git diff --cached",
"description": "View staged changes"
}[2026-01-24 13:03:17]
🔧 Tool Use: Bash (ID: toolu_01XWjFtMY83SNLVU77MHpVFr)
{
"command": "git log --oneline -5",
"description": "View recent commit style"
}[2026-01-24 13:03:17]
📊 Tool Result:
On branch features
Changes to be committed:
(use "git restore --staged <file>..." to unstage)
modified: src/lib.rs
new file: tests/fixtures/blocks/indented_code.toml
new file: tests/fixtures/blocks/indented_code_blank_lines.toml
new file: tests/fixtures/blocks/indented_code_extra_indent.toml
new file: tests/fixtures/blocks/indented_code_tab.toml
new file: tests/fixtures/blocks/indented_code_trailing_blank.toml
[2026-01-24 13:03:17]
📊 Tool Result:
45ed284 chore: bump version to 0.12.0
1edb331 Fix table column alignment with Unicode wide characters (#29)
963b55f chore: bump version to 0.11.0
9effc80 Add support for GitHub-style callouts (alerts) (#26)
715ce4e feat: Add TTY detection and --color flag for pipe passthrough (#25)
[2026-01-24 13:03:17]
📊 Tool Result:
diff --git c/src/lib.rs i/src/lib.rs
index de48f0b..67bf5eb 100644
--- c/src/lib.rs
+++ i/src/lib.rs
@@ -139,6 +139,7 @@ enum ParserState {
InBlockquote {
nesting_level: usize,
},
+ InIndentedCodeBlock,
}
#[derive(Debug, Clone)]
@@ -164,6 +165,9 @@ enum BlockBuilder {
lines: Vec<(usize, String)>,
current_nesting: usize,
},
+ IndentedCodeBlock {
+ lines: Vec<String>,
+ },
}
struct LinkData {
@@ -436,6 +440,7 @@ impl StreamingParser {
ParserState::InListAfterBlank => self.handle_in_list_after_blank(line),
ParserState::InTable => self.handle_in_table(line),
ParserState::InBlockquote { .. } => self.handle_in_blockquote(line),
+ ParserState::InIndentedCodeBlock => self.handle_in_indented_code_block(line),
}
}
@@ -511,6 +516,16 @@ impl StreamingParser {
return None;
}
+ // Check for indented code block (4+ spaces or tab)
+ // Must come after list check (lists take precedence)
+ if let Some(content) = self.is_indented_code_line(trimmed) {
+ self.state = ParserState::InIndentedCodeBlock;
+ self.current_block = BlockBuilder::IndentedCodeBlock {
+ lines: vec![content.to_string()],
+ };
+ return None;
+ }
+
// Otherwise, start a paragraph
self.state = ParserState::InParagraph;
self.current_block = BlockBuilder::Paragraph {
@@ -787,6 +802,36 @@ impl StreamingParser {
None
}
+ fn handle_in_indented_code_block(&mut self, line: &str) -> Option<String> {
+ let trimmed = line.trim_end_matches('\n');
+
+ // Blank line - preserve in code block
+ if trimmed.is_empty() {
+ if let BlockBuilder::IndentedCodeBlock { lines } = &mut self.current_block {
+ lines.push(String::new());
+ }
+ return None;
+ }
+
+ // Still indented? Continue accumulating
+ if let Some(content) = self.is_indented_code_line(trimmed) {
+ if let BlockBuilder::IndentedCodeBlock { lines } = &mut self.current_block {
+ lines.push(content.to_string());
+ }
+ return None;
+ }
+
+ // Not indented - emit block and process line in ready state
+ let output = self.emit_current_block();
+ let next_output = self.handle_ready_state(line);
+
+ match (output, next_output) {
+ (Some(o1), Some(o2)) => Some(format!("{}{}", o1, o2)),
+ (Some(o), None) | (None, Some(o)) => Some(o),
+ (None, None) => None,
+ }
+ }
+
fn parse_atx_heading(&self, line: &str) -> Option<usize> {
let mut level = 0;
for ch in line.chars() {
@@ -843,6 +888,11 @@ impl StreamingParser {
!inner.contains("-->")
}
+ /// Check if a line is indented code (4+ spaces or tab), return content with indentation stripped
+ fn is_indented_code_line<'a>(&self, line: &'a str) -> Option<&'a str> {
+ line.strip_prefix(" ").or_else(|| line.strip_prefix('\t'))
+ }
+
fn is_horizontal_rule(&self, line: &str) -> bool {
// Horizontal rule: 0-3 spaces, then 3+ matching -, _, or * chars
// with optional spaces/tabs between them
@@ -1127,6 +1177,14 @@ impl StreamingParser {
rows,
} => Some(self.format_table(&header, &alignments, &rows)),
BlockBuilder::Blockquote { lines, .. } => Some(self.format_blockquote(&lines)),
+ BlockBuilder::IndentedCodeBlock { lines } => {
+ let mut lines = lines.clone();
+ // Strip trailing blank lines
+ while lines.last().is_some_and(|l| l.is_empty()) {
+ lines.pop();
+ }
+ Some(self.format_code_block(&lines, ""))
+ }
}
}
@@ -1154,6 +1212,7 @@ impl StreamingParser {
.map(|(_, s)| s.as_str())
.collect::<Vec<_>>()
.join("\n"),
+ BlockBuilder::IndentedCodeBlock { .. } => String::new(), // Code blocks don't have images
}
}
diff --git c/tests/fixtures/blocks/indented_code.toml i/tests/fixtures/blocks/indented_code.toml
new file mode 100644
index 0000000..9ced973
--- /dev/null
+++ i/tests/fixtures/blocks/indented_code.toml
@@ -0,0 +1,21 @@
+name = "indented-code-basic"
+description = "Indented code blocks (4+ spaces) should be recognized and formatted"
+
+# Test basic indented code block
+[[chunks]]
+input = " line1\n"
+emit = ""
+
+[[chunks]]
+input = " line2\n"
+emit = ""
+
+# Non-indented line terminates the code block and starts paragraph
+[[chunks]]
+input = "done\n"
+emit = " \u001b[38;2;192;197;206mline1\n \u001b[38;2;192;197;206mline2\n\u001b[0m\n"
+
+# End of document - paragraph is flushed
+[[chunks]]
+input = "\n"
+emit = "done\n\n"
diff --git c/tests/fixtures/block
... (truncated, 2937 chars omitted)
[2026-01-24 13:03:22]
💭 Internal Reasoning (click to expand)
Good, I can see the staged changes and the recent commit style. Now let me create the commit, then export the session, create a gist, and create the PR.
[2026-01-24 13:03:27]
🔧 Tool Use: Bash (ID: toolu_01V9e5gkQT9uW9N5XvUxGdCE)
{
"command": "git commit -m \"$(cat <<'EOF'\nfeat: Add support for GFM indented code blocks\n\nImplement indented code blocks (4+ spaces or tab) per GFM spec section 4.4.\nThese blocks are rendered as plain text code (no syntax highlighting since\nno language can be specified).\n\nKey behaviors:\n- Lines with 4+ spaces or tab start an indented code block\n- Blank lines within the block are preserved\n- Trailing blank lines are stripped\n- Block ends when a non-blank, non-indented line is encountered\n- Extra indentation beyond 4 spaces is preserved in output\n\nCo-Authored-By: Claude Opus 4.5 <[email protected]>\nEOF\n)\"",
"description": "Create commit for indented code blocks feature"
}[2026-01-24 13:03:27]
📊 Tool Result:
[features 01b0e96] feat: Add support for GFM indented code blocks
6 files changed, 173 insertions(+)
create mode 100644 tests/fixtures/blocks/indented_code.toml
create mode 100644 tests/fixtures/blocks/indented_code_blank_lines.toml
create mode 100644 tests/fixtures/blocks/indented_code_extra_indent.toml
create mode 100644 tests/fixtures/blocks/indented_code_tab.toml
create mode 100644 tests/fixtures/blocks/indented_code_trailing_blank.toml
[2026-01-24 13:03:32]
💭 Internal Reasoning (click to expand)
Good, the commit is created. Now I need to:
1. Export the session
2. Push the branch
3. Create a gist with the transcript
4. Create the PR
Let me first export the session using the /export skill.
[2026-01-24 13:03:32]
🔧 Tool Use: Skill (ID: toolu_011NjLUNhVoSGEtXsweQJ9rK)
{
"skill": "export"
}[2026-01-24 13:03:33]
📊 Tool Result:
Launching skill: export
[2026-01-24 13:03:33]
Export the current Claude Code session to a timestamped folder with full conversation history, metadata, and statistics.
!python3 ~/.local/share/claude_sessions/export_claude_session.py
[2026-01-24 13:03:38]
🔧 Tool Use: Bash (ID: toolu_01XY4GsiKsUqxVr4tBMiVq1x)
{
"command": "python3 ~/.local/share/claude_sessions/export_claude_session.py",
"description": "Export Claude Code session"
}