Borrowing it
Nothing to install: this file belongs to brain-bootstrap/claude-code-brain-bootstrap. 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/brain-bootstrap/claude-code-brain-bootstrap/main/CLAUDE.mdgit clone --depth 1 https://github.com/brain-bootstrap/claude-code-brain-bootstrapWrote 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/brain-bootstrap/claude-code-brain-bootstrap/claude-md)<a href="https://agentmods.dev/instructions/brain-bootstrap/claude-code-brain-bootstrap/claude-md"><img src="https://agentmods.dev/badge/instructions/brain-bootstrap/claude-code-brain-bootstrap/claude-md.svg" alt="Measured on agentmods" 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 | $0.03334 | $0.03334 |
| Opus 5 | $0.01667 | $0.01667 |
| Sonnet 5 | $0.00667 | $0.00667 |
| Haiku 4.5 | $0.00333 | $0.00333 |
Grade A, and why
claude-code-brain-bootstrap 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 3d 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 — 200 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Code — {{PROJECT_NAME}} Instructions
Non-negotiable. Auto-injected every message. Budget: <4KB. Detail in
claude/*.md— read viaread_file.
@claude/architecture.md @claude/rules.md
⚠️ Mandatory Reads — You MUST consult before acting
Session start → read claude/tasks/todo.md (current task state) + claude/tasks/lessons.md (accumulated wisdom from past sessions).
| If task involves… | YOU MUST read FIRST |
|---|---|
| anything (first action) | claude/tasks/todo.md + claude/tasks/lessons.md + claude/tasks/CLAUDE_ERRORS.md + claude/architecture.md + claude/rules.md |
| build, test, CI, lint, format, migration, local dev | claude/build.md |
| MR, PR, ticket, context management | claude/templates.md |
| terminal, command, shell, subprocess, pager, interactive | claude/terminal-safety.md |
| CVE, dependency upgrade, security scan | claude/cve-policy.md |
| plugin, claude-mem, hook coexistence, API quota, rtk, graphify | claude/plugins.md |
| structural query, call trace, codebase-memory, semantic search, cocoindex, code-review-graph, change risk, playwright, serena | claude/plugins.md |
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.
- 3d ago First seen · 200 lines · 3,334 tokens per session scan A c6e02618eb70
claude-code-brain-bootstrap CLAUDE.md is an instructions file published in the GitHub repository brain-bootstrap/claude-code-brain-bootstrap (11 stars, last pushed 4mo ago), licensed MIT. It adds 3,334 tokens to every session, about $0.0167 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 2026-09-03.
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