Borrowing it
Nothing to install: this file belongs to moneytosms/claude-start. 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/moneytosms/claude-start/main/CLAUDE.mdgit clone --depth 1 https://github.com/moneytosms/claude-startWrote 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/moneytosms/claude-start/claude-md)<a href="https://agentmods.dev/instructions/moneytosms/claude-start/claude-md"><img src="https://agentmods.dev/badge/instructions/moneytosms/claude-start/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/moneytosms/claude-start/claude-md"><img src="https://agentmods.dev/badge/instructions/moneytosms/claude-start/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 | $0.00749 | $0.00749 |
| Opus 5 | $0.00375 | $0.00375 |
| Sonnet 5 | $0.00150 | $0.00150 |
| Haiku 4.5 | $0.00075 | $0.00075 |
Grade A, and why
claude-start 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.
How it starts
The opening of the file, as written. The whole thing — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.
[PROJECT_NAME]
[One sentence: what this project does.]
Stack
- Runtime:
- Framework:
- Key deps:
- Test:
- Lint:
- Format:
- Build:
- Deploy:
- RTK wrappers:
Canary
Every completed task must end with: [Canary:PROJECT_NAME:TASK_NAME]
Can't produce it = context dropped. Stop and say so.
Tooling
- RTK — Bash output auto-compressed. First layer for ALL matching commands, raw only if no wrapper exists. See RTK wrappers in Stack above for this project's exact commands. Full list:
rtk help. - ctx7 —
npx ctx7 library <name> <query>before touching any external API. Never rely on training data for library APIs. - Caveman —
/cavemanfor long sessions./caveman offto disable. - Handoff — use
/handoffbefore ending a session, not/compact.
Context rules
- Flag before any phase that risks one context window.
- Running low →
/checkpoint, then stop. SessionStart hook will surface it. - All commands must work headless.
Error protocol
- Minor (typo, wrong flag): note inline, continue.
- Major (wrong architecture, repeated mistake):
- Append to
.claude/errors.md - If pattern → create
.claude/skills/<name>.md - If approach changes → append to Learned rules below
- Append to
Agent output conventions
Anything we build that talks back to Claude (hooks, agent defs, skills, subagent reports) follows .claude/rules/agent-output-conventions.md: no silent truncation, explicit empty states, end with a concrete next command.
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.
- 9d ago First seen · 67 lines · 749 tokens per session scan A d76d1044d840
claude-start CLAUDE.md is an instructions file published in the GitHub repository moneytosms/claude-start (2 stars, last pushed 16d ago), licensed MIT. It adds 749 tokens to every session, about $0.0037 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 2026-08-31.
Other instructions, from other repositories
plan-forge database.instructions.md
Database patterns for .NET — Dapper/EF Core, parameterized queries, migration strategy.
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.
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.
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).
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).
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.