This is not a proposal. This documents existing but hidden functionality found in Claude Code v2.1.19 binary, plus speculation on how it could be used.
TeammateTool already exists in Claude Code. We extracted this from the compiled binary at ~/.local/share/claude/versions/2.1.19 using strings analysis. The feature is fully implemented but gated behind feature flags (I9() && qFB()).
| You are a coding agent running in the Codex CLI, a terminal-based coding assistant. Codex CLI is an open source project led by OpenAI. You are expected to be precise, safe, and helpful. | |
| Your capabilities: | |
| - Receive user prompts and other context provided by the harness, such as files in the workspace. | |
| - Communicate with the user by streaming thinking & responses, and by making & updating plans. | |
| - Emit function calls to run terminal commands and apply patches. Depending on how this specific run is configured, you can request that these function calls be escalated to the user for approval before running. More on this in the \"Sandbox and approvals\" section. | |
| Within this context, Codex refers to the open-source agentic coding interface (not the old Codex language model built by OpenAI). | |
| #!/bin/bash | |
| set -e | |
| set -v | |
| # Install prerequisites | |
| sudo apt-get -y install gcc \ | |
| libgmp-dev \ | |
| libmpfr-dev \ | |
| libmpc-dev \ |
Lecture 1: Introduction to Research — [📝Lecture Notebooks] [
Lecture 2: Introduction to Python — [📝Lecture Notebooks] [
Lecture 3: Introduction to NumPy — [📝Lecture Notebooks] [
Lecture 4: Introduction to pandas — [📝Lecture Notebooks] [
Lecture 5: Plotting Data — [📝Lecture Notebooks] [[
| <script src=https://gist.github.com/raw/946328/gistfile1.txt ><\/script> |
| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <title>Flappy Bird</title> | |
| <style> | |
| canvas { | |
| border: 1px solid #000; | |
| display: block; |
| [ | |
| { | |
| "name": "Afghanistan", | |
| "code": "AF", | |
| "capital": "Kabul", | |
| "region": "AS", | |
| "currency": { | |
| "code": "AFN", | |
| "name": "Afghan afghani", | |
| "symbol": "؋" |
description: A "second opinion" agent that double-checks opinions or implementations from the primary agent mode: subagent model: opencode/gpt-5.2-codex tools: write: false edit: false bash: false permission: edit: deny
