Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/cola-io/codex-acp/agents-mdgit clone --depth 1 https://github.com/cola-io/codex-acpWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.03068 | $0.03068 |
| Opus 5 | $0.01534 | $0.01534 |
| Sonnet 5 | $0.00614 | $0.00614 |
| Haiku 4.5 | $0.00307 | $0.00307 |
Grade A, and why
codex-acp AGENTS.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 332 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Repository Guidelines
This document describes how to work in this repo using idiomatic Rust patterns and the current module layout.
Project Structure
- src/
- lib.rs — library crate root; exposes
agent,fs,logging; re-exportsCodexAgent,SessionManager,FsBridge, andinit_from_envfor embedders. - main.rs — binary entrypoint; initializes tracing, loads config + profiles, boots the filesystem bridge, and wires the ACP runtime. Pass
--acp-fs-mcpto run the standalone filesystem MCP server. - logging.rs — tracing init helpers driven by env variables (
init_from_env), including optional file logging and daily rotation. - agent/
- mod.rs — Agent trait façade; wires ACP trait methods into
CodexAgentand re-exportsClientOp. - core.rs — defines
CodexAgentandClientOp, handles initialize/auth/new/load session, and applies session mode/model mutations while coordinating the auth/conversation managers. - prompt.rs — streaming prompt pipeline, slash-command detection, tool + reasoning updates, cancel handling, and extension method stubs.
- commands.rs — slash command registry (
AVAILABLE_COMMANDS) plus helpers likehandle_slash_commandand/statusrendering. - events.rs — Codex Event → ACP update formatting (
EventHandler), approval option helpers, andReasoningAggregatorfor thought text. - config_builder.rs — builds per-session
Configinstances, injects filesystem guidance, and produces MCP server configs (prepare_fs_mcp_server_config,build_mcp_server). - session_manager.rs — session state store (
SessionState,SessionManager), conversation caching, capability tracking, notification helpers, andapply_context_override. - utils.rs — shared helpers for session modes/models, provider detection, tool formatting (
format_command_call,describe_mcp_tool,is_custom_provider, etc.).
- mod.rs — Agent trait façade; wires ACP trait methods into
- fs/
- mod.rs, bridge.rs, mcp_server.rs — filesystem bridge runtime (
FsBridge::start) and MCP server entry (run_mcp_server) communicating viaACP_FS_BRIDGE_ADDR/ACP_FS_SESSION_ID.
- mod.rs, bridge.rs, mcp_server.rs — filesystem bridge runtime (
- lib.rs — library crate root; exposes
- Cargo.toml, rust-toolchain.toml
- README.md, AGENTS.md
- Makefile, scripts/stdio-smoke.sh
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 332 lines · 3,068 tokens per session scan A f7cddd0a2d3b
codex-acp AGENTS.md is an instructions file published in the GitHub repository cola-io/codex-acp (142 stars, last pushed 7mo ago), licensed Apache-2.0. It adds 3,068 tokens to every session, about $0.0153 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other instructions, from other repositories
intelligent-terminal rust-wta.instructions.md
File-scoped conventions for the WTA Rust crate.
intelligent-terminal rust.instructions.md
Concise Rust coding conventions for this repository.
intelligent-terminal agent-skills.instructions.md
Guidelines for creating high-quality Agent Skills for GitHub Copilot.
intelligent-terminal rust-localization.instructions.md
Instructions for microsoft/intelligent-terminal, covering localization instructions for rust wta (yaml locale files), file structure, file format, the en-us.yml source file and non-translatable token rules.
intelligent-terminal localization.instructions.md
Instructions for microsoft/intelligent-terminal, covering localization instructions for .resw resource files, components with localized resources, locale categories, authoritative locale list (from terminalapp) and adding or updating localized strings.
intelligent-terminal copilot-instructions.md
Copilot instructions for microsoft/intelligent-terminal, covering copilot instructions for windows terminal, build, running, test and code formatting.