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claude-harness: Instructions file for Claude Code

CLAUDE.md

claude-harness CLAUDE.md is an instructions file for Claude Code from panayiotism/claude-harness. It costs 701 tokens per session, scanned A, original, MIT.

Project instructions for the Claude Harness plugin, a system for organizing coding sessions with saved context, automated checks, feature tracking, and agent teams. ATDD means acceptance test-driven development: defining expected behavior as tests before implementation.

In plain words
What is it for?
It helps maintain the harness project, preserve context between sessions, manage features and GitHub work, run quality checks, and coordinate implementation through agent teams.
Why use it?
It gives the coding agent a consistent startup routine and explains where project memory, hooks, skills, agents, and configuration live.

Instructions file for Claude Code

Written for Claude Code: SessionStart hook event. Also seen: mentions CLAUDE.md; mentions subagents; mentions Claude Code.

This is panayiotism/claude-harness's own configuration. It tells Claude Code how to work on claude-harness 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 claude-harness configures →

not rated 79repo 1mo ago A scan 701 tokens original MIT
View source ↗ panayiotism/claude-harness
Reuse

Borrowing it

Nothing to install: this file belongs to panayiotism/claude-harness. 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/panayiotism/claude-harness/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/panayiotism/claude-harness

Made for: Claude Code.

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README.md
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Per session 701 This file is loaded in full into every session.
When invoked 701 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 $0.00701 $0.00701
Opus 5 $0.00351 $0.00351
Sonnet 5 $0.00140 $0.00140
Haiku 4.5 $0.00070 $0.00070

Measured 9d ago against content hash 4ea63238115a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

claude-harness CLAUDE.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 9d 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 · 53 lines

How it starts

The opening of the file, as written. The whole thing — 53 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Claude Harness Plugin

Project Overview

Claude Code plugin for automated, context-preserving coding sessions with 5-layer memory architecture, failure prevention, self-improving skills, feature tracking, GitHub integration, Agent Teams with ATDD (Acceptance Test-Driven Development), and quality gate hooks.

Tech Stack

  • Shell/Bash (setup.sh, hooks/)
  • Markdown (skills)
  • JSON (configuration, state files)

Session Startup Protocol

The SessionStart hook auto-injects session context (features, GitHub info, interrupt markers). Before starting harness work, read .claude-harness/session-briefing.md for full context; check .claude-harness/features/active.json for current priorities.

Project Structure

  • skills/ - Agent Skills (SKILL.md with YAML frontmatter, auto-discovered by Claude Code)
  • agents/ - Plugin subagents (harness-implementer executes delegated feature lifecycles)
  • hooks/ - Session hooks (8 registrations, extensionless scripts with run-hook.cmd polyglot wrapper)
  • scripts/ - Shared helpers (compile-briefing.py compiles memory into briefings)
  • schemas/ - Canonical JSON Schema files for state file validation
  • setup.sh - Project initialization script (memory dirs, CLAUDE.md, migrations; stamp-gated at session start)
  • .claude-plugin/plugin.json - Plugin manifest
  • Marketplace lives in separate repo: panayiotism/claude-harness-marketplace
  • Updates tracked by git commit SHA (no semver in plugin.json) — GitHub Actions syncs to marketplace on every push

GitHub Integration

All GitHub operations use the gh CLI (issues, PRs, merges). The GitHub MCP server is NOT required.

Development Rules

  • Work on ONE feature at a time
  • Always update .claude-harness/claude-progress.json after completing work
  • Update changelog in README.md
  • Commit with descriptive messages
  • Leave codebase in clean, working state

Available Skills (6 total)

  • /claude-harness:setup - Initialize harness in project
  • /claude-harness:start - Start session, compile context
  • /claude-harness:flow - Unified workflow (recommended)
    • Flags: --no-merge --plan-only --autonomous --quick --fix --team
  • /claude-harness:checkpoint - Manual commit + push + PR
  • /claude-harness:merge - Merge all PRs, auto-version, release
  • /claude-harness:prd-breakdown - Analyze PRD and break down into features with Gherkin acceptance criteria

Read the full file on GitHub · 53 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. 9d ago First seen · 53 lines · 701 tokens per session scan A 4ea63238115a

Subscribe to this mod's changes

claude-harness CLAUDE.md is an instructions file published in the GitHub repository panayiotism/claude-harness (79 stars, last pushed 1mo ago), licensed MIT. It adds 701 tokens to every session, about $0.0035 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.

Memory and contextProject management
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