keen-code: Instructions file for Codex

AGENTS.md

keen-code AGENTS.md is an instructions file for Codex, OpenCode from mochow13/keen-code. It costs 288 tokens per session, scanned A, original, MIT.

Project instructions for Keen Code, a command-line coding agent written in Go and powered by Firebase Genkit for its language-model interactions. They describe its tools, filesystem safeguards, testing, formatting, and commit conventions.

In plain words
What is it for?
Use them when changing the agent’s file tools, filesystem permissions, interactive terminal, language-model client, or Go code, and when preparing a commit.
Why use it?
They keep changes aligned with the project’s architecture and permission rules. They also provide repeatable checks for race conditions, dependencies, formatting, and commit contents.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions subagents; mentions AGENTS.md.

This is mochow13/keen-code's own configuration. It tells Codex and OpenCode how to work on keen-code itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything keen-code configures →

Reuse

Borrowing it

Nothing to install: this file belongs to mochow13/keen-code. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/mochow13/keen-code/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/mochow13/keen-code

Made for: Codex, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for keen-code AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/mochow13/keen-code/agents-md/github.svg)](https://agentmods.dev/instructions/mochow13/keen-code/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/mochow13/keen-code/agents-md"><img src="https://agentmods.dev/badge/instructions/mochow13/keen-code/agents-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for keen-code AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/mochow13/keen-code/agents-md"><img src="https://agentmods.dev/badge/instructions/mochow13/keen-code/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 288 This file is loaded in full into every session.
When invoked 288 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00288 $0.00288
Opus 5.5 $0.00115 $0.00115
Sonnet 5.5 $0.00058 $0.00058
Haiku 4.5 $0.00029 $0.00029

Measured 1mo ago against content hash a4e984e3ee41, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

keen-code 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 1mo 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

AGENTS.md · 21 lines

What it actually says

Keen Code

Terminal-based AI coding agent written in Go. It supports multiple LLM providers, built-in and MCP tools, skills, subagents, persistent sessions, and a Bubble Tea REPL.

Working on this repository

  • Keep changes focused; avoid speculative refactors and unnecessary comments.
  • Preserve existing public tool contracts and permission checks. File operations must go through internal/filesystem guards.
  • Do not expose, log, or commit API keys, OAuth credentials, session transcripts, or other secrets.
  • Project instructions are loaded from AGENTS.md; skills, agents, and memory are separate user/project configuration.

Architecture

  • cmd/ — CLI entry point.
  • internal/cli/ — Cobra commands and Bubble Tea REPL.
  • internal/llm/ — provider clients, tool execution, context management, and prompt formatting.
  • internal/tools/ — built-in LLM tools and input validation.
  • internal/filesystem/ — working-directory, sensitive-path, and .gitignore access guard.
  • internal/config/ and internal/providers/ — provider configuration and model metadata.
  • internal/session/ — JSONL-backed session persistence.
  • internal/mcp/, internal/mcpskills/, internal/skills/, internal/subagents/, internal/memory/ — extensibility and agent features.
Changes

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.

  1. 1mo ago Changed · -4 lines · +15 tokens per session a4e984e3ee41
  2. 2mo ago First seen · 25 lines · 273 tokens per session scan A 97e8f02c070b

Subscribe to this mod's changes

keen-code AGENTS.md is an instructions file published in the GitHub repository mochow13/keen-code (75 stars, last pushed yesterday), licensed MIT. It adds 288 tokens to every session, about $0.0012 per session on Opus 5.5. 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.

Related

Other instructions, from other repositories

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 9,715 tokens

next.js AGENTS.md

AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.

vercel/next.js · 7,461 tokens

vscode oss-third-party-notices.instructions.md

Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).

microsoft/vscode · 5,262 tokens

langchain AGENTS.md

AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.

langchain-ai/langchain · 4,680 tokens

vscode copilot-instructions.md

Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).

microsoft/vscode · 2,750 tokens

deno copilot-instructions.md

Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.

denoland/deno · 3,077 tokens