Borrowing it
Nothing to install: this file belongs to nikitaCodeSave/claude-code-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.
curl -O https://raw.githubusercontent.com/nikitaCodeSave/claude-code-harness/main/AGENTS.mdgit clone --depth 1 https://github.com/nikitaCodeSave/claude-code-harnessWrote 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.
[](https://agentmods.dev/instructions/nikitacodesave/claude-code-harness/agents-md)<a href="https://agentmods.dev/instructions/nikitacodesave/claude-code-harness/agents-md"><img src="https://agentmods.dev/badge/instructions/nikitacodesave/claude-code-harness/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.
<a href="https://agentmods.dev/instructions/nikitacodesave/claude-code-harness/agents-md"><img src="https://agentmods.dev/badge/instructions/nikitacodesave/claude-code-harness/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.01349 | $0.01349 |
| Opus 5.5 | $0.00540 | $0.00540 |
| Sonnet 5.5 | $0.00270 | $0.00270 |
| Haiku 4.5 | $0.00135 | $0.00135 |
Grade A, and why
claude-code-harness 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.
How it starts
The opening of the file, as written. The whole thing — 92 lines — stays where its author put it; the contents beside it link to each section on GitHub.
claude-code-harness — operational notes for coding agents
This repository is the source of truth for two Claude Code plugins. Read this before changing
anything; it carries what the file tree cannot tell you. Claude Code additionally loads
.claude/CLAUDE.md (maintainer-facing, Russian); agents from other vendors get this file.
Layout — the part that is easy to break
.claude-plugin/marketplace.json(repo root) is the marketplace catalog. Each plugin's own manifest isplugins/<name>/.claude-plugin/plugin.json.- There are two plugins:
plugins/harness/(the kit — a skill plus on-demand references) andplugins/devlog/(the continuity companion the kit points at). .claude/at the repo root is this repository's own dev harness. It is not part of either plugin and never ships.~/.claude/skills/claude-code-harnesson the maintainer's machine is a symlink toplugins/harness/, so edits here are live immediately. Edit here, never in a copy.evals/is the kit's own regression suite — mechanical checks plus one fixture project and a criteria file written before the runs. Dev harness, never shipped. A test whose mechanism the kit has retired is deleted, not kept green: four of six tests spent five releases exercising a Phase 5 that no longer exists (evals/README.mdrecords the cut).
Commands
# release: writes the version into BOTH plugin.json files in lockstep, checks shipped-by stamps,
# stages the shippable surface, prints the commit/tag/push finish. It never commits for you.
./plugins/harness/scripts/release.sh <version>
# manifest validation
claude plugin validate .
# devlog index (required after adding an entry under .claude/devlog/entries/)
./plugins/devlog/bin/devlog-reindex
# regression suite — seconds, free; run it before every release
./evals/run.sh mech
Done = ./evals/run.sh mech exits 0, release.sh completes without a stamp mismatch,
plugin validate prints ✔ Validation passed, and the reindexer reports no ERRORS. The suite
was red for four consecutive releases because this line did not name it.
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.
- 1mo ago Changed · +2 lines · +49 tokens per session ad896edc65d0
- 1mo ago First seen · 90 lines · 1,300 tokens per session scan A f2c4fee35fe1
claude-code-harness AGENTS.md is an instructions file published in the GitHub repository nikitaCodeSave/claude-code-harness (4 stars, last pushed 1mo ago), licensed MIT. It adds 1,349 tokens to every session, about $0.0054 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 2026-08-31.
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).
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.
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).
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.
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).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.