agentharness: Instructions file for Claude Code

CLAUDE.md

agentharness CLAUDE.md is an instructions file for Claude Code from andr-ca/agentharness. It costs 4,919 tokens per session, scanned A, original, MIT.

A repository instruction file for Claude Code that defines how agents should work in agentharness. It covers completion checks, local commits, publishing authority, and repository guidance.

In plain words
What is it for?
It requires checking lint, types, tests, coverage, and content quality; creating focused local commits; and asking for confirmation before pushing or opening a pull request.
Why use it?
It makes the expected safety and verification steps explicit before an agent declares work complete or shares changes externally.

Instructions file for Claude Code

Written for Claude Code: PreToolUse hook event. Also seen: reads .claude/ paths; names the AskUserQuestion tool; mentions Claude Code.

This is andr-ca/agentharness's own configuration. It tells Claude Code how to work on agentharness 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 agentharness configures โ†’

Reuse

Borrowing it

Nothing to install: this file belongs to andr-ca/agentharness. 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/andr-ca/agentharness/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/andr-ca/agentharness

Made for: Claude Code.

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 agentharness CLAUDE.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/andr-ca/agentharness/claude-md.svg)](https://agentmods.dev/instructions/andr-ca/agentharness/claude-md)
Your own site
<a href="https://agentmods.dev/instructions/andr-ca/agentharness/claude-md"><img src="https://agentmods.dev/badge/instructions/andr-ca/agentharness/claude-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 4,919 This file is loaded in full into every session.
When invoked 4,919 The same file โ€” it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.04919 $0.04919
Opus 5 $0.02459 $0.02459
Sonnet 5 $0.00984 $0.00984
Haiku 4.5 $0.00492 $0.00492

Measured 2d ago against content hash f73a2c1f7493, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

agentharness CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories โ€” prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency โ€” 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.

CLAUDE.md ยท 371 lines

How it starts

The opening of the file, as written. The whole thing โ€” 371 lines โ€” stays where its author put it; the contents beside it link to each section on GitHub.

agentharness โ€“ Agent Router

This file is loaded into every session that touches this repo. Keep it short โ€” everything else is one link away. Full index: MANIFEST.md. Planned-but-not-built: ROADMAP.md.

๐Ÿค– Agent Workflow Completion

Default (no publish authority): verify and stage, then stop.

  1. โœ… Run the completion gate โ€” before declaring any work done, run bash tools/check-completion.sh. This script verifies lint, types, tests, coverage, and content quality in one shot and exits non-zero if anything fails. The Stop hook in .github/hooks/completion-gate.json and .claude/settings.json enforces this automatically for Claude Code and GitHub Copilot โ€” the agent cannot stop until all gates pass.
  2. โœ… Create atomic commits locally โ€” one logical unit per commit, clear message explaining WHY
  3. ๐Ÿ›‘ Stop before pushing, opening a PR, or auto-implementing recommendations. Present a summary of what's staged and ask the user to confirm before publishing anything.

A local commit is not a durable safe-point in an ephemeral-container execution environment. If you have verified, committed-but-unpushed work and are about to block on AskUserQuestion or other unbounded human input, consider pushing to a remote branch (a scratch/WIP branch is fine) first โ€” committed-but-unpushed work can be lost if the container is reclaimed during the wait, with no error at commit time and no warning until a later git log looks unfamiliar. This is disclosure of an existing risk, not a grant of publish authority: it does not authorize opening a PR or merging, and the default tier above still governs those.

Full publish authority (commit โ†’ push โ†’ PR, same as before) applies only when either is true:

  • .agentharness-publish-mode exists at this repo's root (a local, gitignored, per-operator flag โ€” see "Publish authority" below), or
  • The user has explicitly granted standing authorization for this session or task in the current conversation. This always overrides the flag in either direction โ€” explicit instructions in the request outrank a standing file the same way rigor-tier precedence already works (see patterns/profiles/README.md#precedence-order).

Read the full file on GitHub ยท 371 lines

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. 2d ago First seen ยท 371 lines ยท 4,919 tokens per session scan A f73a2c1f7493

Subscribe to this mod's changes

agentharness CLAUDE.md is an instructions file published in the GitHub repository andr-ca/agentharness (1 stars, last pushed 3d ago), licensed MIT. It adds 4,919 tokens to every session, about $0.0246 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 2026-09-03.

Related

Other instructions, from other repositories

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 ยท 7,296 tokens

codex AGENTS.md

AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.

openai/codex ยท 5,182 tokens

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 ยท 6,785 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, applying the notice (cutover) and fallback chain (never fail the build).

microsoft/vscode ยท 5,001 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 ยท 4,469 tokens

spec-kit AGENTS.md

AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart โ€” add a new integration in 5 steps, integration architecture and integrationmanifest โ€” file tracking.

github/spec-kit ยท 7,104 tokens