harness-kit: Instructions file for Codex

AGENTS.md

harness-kit AGENTS.md is an instructions file for Codex, OpenCode from deepklarity/harness-kit. It costs 383 tokens per session, scanned A, original, MIT.

Repository instructions for Harness Kit, a toolkit that helps people and AI agents build software together. It includes an orchestration command-line tool, a task board, a provider-quota checker, and reusable engineering patterns.

In plain words
What is it for?
Starting the development environment, checking service providers, running the full verification script, and adopting the toolkit's patterns in another repository.
Why use it?
They give agents the project context, required documentation, operating principles, and safety rules needed to work in a shared codebase.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions subagents.

This is deepklarity/harness-kit's own configuration. It tells Codex and OpenCode how to work on harness-kit 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 harness-kit configures →

Reuse

Borrowing it

Nothing to install: this file belongs to deepklarity/harness-kit. 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/deepklarity/harness-kit/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/deepklarity/harness-kit

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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README.md
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Per session 383 This file is loaded in full into every session.
When invoked 383 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 $0.00383 $0.00383
Opus 5.5 $0.00153 $0.00153
Sonnet 5.5 $0.00077 $0.00077
Haiku 4.5 $0.00038 $0.00038

Measured 1mo ago against content hash 44d588e10fc3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

harness-kit 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.

AGENTS.md · 41 lines

What it actually says

AGENTS.md

You are a coding agent in the harness-kit repo. Start here.

What this repo is

A toolkit for humans and AI building software together: an orchestration CLI (odin/), a task board (taskit/ — Django API + React UI), a provider quota checker (harness_usage_status/), and portable engineering patterns (.claude/skills/, docs/patterns/).

If you were sent here to adopt the patterns into another repo

Read docs/Quickstart.md and follow it exactly. It is written for you.

If you are working on this repo

  • Read CLAUDE.md — the full operating manual (memory policy, git safety, testing discipline, subagent strategy). It applies to every agent, not just Claude.
  • Read odin/docs/philosophy.md — the 20 tenets every change is judged against.
  • Each project has its own CLAUDE.md/README.md with commands and conventions.

Commands you'll need

./dev.sh                 # start backend :9100, dashboard :9200, workers
source .venv/bin/activate && odin doctor    # check providers
scripts/verify.sh        # the one gate: all test suites, non-zero on any red

Hard rules

  • Never run git stash in the main checkout (parallel agents share it).
  • Never edit files inside .odin/worktrees/.
  • Tests pass ≠ done — verify the change live, then show the evidence.
  • Write like you talk: docs/fable_roadmap/TONE.md.
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 First seen · 41 lines · 383 tokens per session scan A 44d588e10fc3

Subscribe to this mod's changes

harness-kit AGENTS.md is an instructions file published in the GitHub repository deepklarity/harness-kit (102 stars, last pushed 3mo ago), licensed MIT. It adds 383 tokens to every session, about $0.0015 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.

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