Borrowing it
Nothing to install: this file belongs to SumithSB/brainvault. 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/SumithSB/brainvault/main/CLAUDE.mdgit clone --depth 1 https://github.com/SumithSB/brainvaultWrote 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/sumithsb/brainvault/claude-md)<a href="https://agentmods.dev/instructions/sumithsb/brainvault/claude-md"><img src="https://agentmods.dev/badge/instructions/sumithsb/brainvault/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/sumithsb/brainvault/claude-md"><img src="https://agentmods.dev/badge/instructions/sumithsb/brainvault/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 | $0.01898 | $0.01898 |
| Opus 5.5 | $0.00759 | $0.00759 |
| Sonnet 5.5 | $0.00380 | $0.00380 |
| Haiku 4.5 | $0.00190 | $0.00190 |
Grade B, and why
brainvault CLAUDE.md scanned grade B with 1 finding 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 2mo 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.
Reads agent configuration directoriesmediumAgent snooping
.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.
- `claude_code.py` — `~/.claude/settings.json` (MCP + Stop + PostToolUse hooks) + `~/.claude/CLAUDE.md` + transcript parsing How it starts
The opening of the file, as written. The whole thing — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Brainvault
Personal memory layer for Claude Code and Cursor. SQLite + FTS5 + optional semantic search + MCP. Zero infrastructure.
Key constraints
- No Docker, no external services, SQLite only
- Python 3.10+, supports Claude Code + Cursor (one install targets every detected host)
- Optional semantic extras:
pip install 'brainvault[semantic]'(fastembed + sqlite-vec)
Structure
brainvault/db.py— storage layer: SQLite schema, FTS5, vector search, reflection queriesbrainvault/mcp_server.py— 12 MCP tools served via stdiobrainvault/cli.py— CLI entry point (23 commands)brainvault/capture.py— Stop hook entry (maintenance + session save); iterates adapters for recent transcript JSONLbrainvault/tool_capture.py— Tool-hook stdin reader; dispatches payloads to adapters (owns_payload/event_from_payload); <20 ms per event, never crashesbrainvault/adapters/— per-host integration layer.base.py—AgentAdapterABC +HookResult/SessionEventdataclassesclaude_code.py—~/.claude/settings.json(MCP + Stop + PostToolUse hooks) +~/.claude/CLAUDE.md+ transcript parsingcursor.py—~/.cursor/mcp.json+~/.cursor/rules/brainvault.mdc+~/.cursor/hooks.json(stop + postToolUse + afterFileEdit + afterShellExecution) +~/.cursor/projects/*/agent-transcripts/*/*.jsonl
brainvault/installer.py— dispatches install / uninstall over every detected adapter; auto-seeds only when the vault has zero memories (otherwise skip with a hint)brainvault/bootstrap.py— bulk-imports session transcripts (Claude Code~/.claude/projects+ Cursor~/.cursor/projects/.../agent-transcripts)brainvault/git_scan.py— mines git history for architectural decision memories; discover_repos() for full-system scanbrainvault/code_scan.py— file tree walker, regex import extractor, co-change matrix builder; index_repo() orchestratorbrainvault/embeddings.py— fastembed wrapper (BAAI/bge-small-en-v1.5, lazy-loaded singleton)brainvault/graph.py— generates self-contained HTML brain graph (D3.js force-directed); two-layer visualization: memory circles + teal diamond code file nodes (from code_entities/ code_cochange tables populated by index-repo); 6 edge types: belongs_to, file_overlap, temporal, keyword_overlap, cochange (files that change together), memory_file (commit→file); Layer filter chips, edge toggles, full-text search across paths/languages/keywords
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.
- 2mo ago First seen · 112 lines · 1,898 tokens per session scan B d2201a6670e0
brainvault CLAUDE.md is an instructions file published in the GitHub repository SumithSB/brainvault (3 stars, last pushed today), licensed MIT. It adds 1,898 tokens to every session, about $0.0076 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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