Borrowing it
Nothing to install: this file belongs to rvdbreemen/adr-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.
curl -O https://raw.githubusercontent.com/rvdbreemen/adr-kit/dev/CLAUDE.mdgit clone --depth 1 https://github.com/rvdbreemen/adr-kitWrote 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/rvdbreemen/adr-kit/claude-md)<a href="https://agentmods.dev/instructions/rvdbreemen/adr-kit/claude-md"><img src="https://agentmods.dev/badge/instructions/rvdbreemen/adr-kit/claude-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/rvdbreemen/adr-kit/claude-md"><img src="https://agentmods.dev/badge/instructions/rvdbreemen/adr-kit/claude-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 | $0.00741 | $0.00741 |
| Opus 5.5 | $0.00296 | $0.00296 |
| Sonnet 5.5 | $0.00148 | $0.00148 |
| Haiku 4.5 | $0.00074 | $0.00074 |
Grade A, and why
adr-kit 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 11d 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 — 38 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ADR Kit
Read .adr-kit/ADR-guide.md before architectural changes. Architecture decisions live in docs/adr/. Use /adr-kit:context before implementation, /adr-kit:adr for new decisions, and /adr-kit:judge before commit.
Backlog.md
This repository uses Backlog.md (backlog/) as the source of truth for work.
- Search for an existing task before starting any meaningful implementation or design work.
- If no task exists, create one before editing code or docs.
- Prefer the Backlog MCP tools for reading, searching, creating, and updating
tasks. Use the
backlogCLI only as a fallback. - Keep tasks small enough to complete in one focused pass.
- Do not edit files in
backlog/tasks/directly.
Working in this repo
- Reproduce the cause a backlog task names before you design a fix; correct the record afterwards. In two sweeps the recorded cause held for 3 of 4 and 4 of 12 tasks respectively. Also check the severity estimate and the completeness of any enumeration, not only the stated cause.
python -m pytest -qtakes ~11 minutes and is mandatory before a merge or release. Targeted runs miss guards in files your change does not touch: a module split broke a check intests/test_setup_project_command.py.- Never switch branches during a test run. A run that starts on branch A and ends on B reports failures that are artifacts of the checkout.
- Make all changes in canonical files first, then regenerate once with
python scripts/build-client-adapters.py, and confirm with--check(expectchanged=0). Never editcodex/orcopilot/by hand. python bin/adr relate ADR-A --to ADR-Bwrites both sides; ADR-028's gate does not let a one-sided link pass lint.python bin/adr accept ADR-Nrefuses without--confirm: acceptance puts a name into an immutable history and must be explicitly requested.- ADR-010 caps lines per file, enforced in
tests/test_release_allowlist.py: entrypoints inscripts/at most 300 lines, support modules 400. Split along the seam the docstring already describes and add the new module to that list. mainanddevare protected withenforce_admins: true, sogh pr merge --admindoes not bypass the requiredvalidatecheck. Use--auto: it weakens nothing and merges once the checks pass. Merging tomainis the maintainer's action.
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.
- 11d ago Changed · -56 tokens per session 66853ee9dd09
- 1mo ago First seen · 38 lines · 797 tokens per session scan A 1a0e92c3a8fc
adr-kit CLAUDE.md is an instructions file published in the GitHub repository rvdbreemen/adr-kit (13 stars, last pushed yesterday), licensed MIT. It adds 741 tokens to every session, about $0.0030 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.