Borrowing it
Nothing to install: this file belongs to skyphusion-labs/common-thread-mcp. 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/skyphusion-labs/common-thread-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/skyphusion-labs/common-thread-mcpWrote 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/skyphusion-labs/common-thread-mcp/claude-md)<a href="https://agentmods.dev/instructions/skyphusion-labs/common-thread-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/skyphusion-labs/common-thread-mcp/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 | $0.00449 | $0.00449 |
| Opus 5 | $0.00225 | $0.00225 |
| Sonnet 5 | $0.00090 | $0.00090 |
| Haiku 4.5 | $0.00045 | $0.00045 |
Grade A, and why
common-thread-mcp 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 6d 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.
What it actually says
CLAUDE.md -- common-thread-mcp
Guidance for agents working in this repository.
What this is
@skyphusion/common-thread-mcp: stdio MCP server that drives the Common Thread backend HTTP API
(same surface as the public web UI). MIT client door; Common Thread remains AGPL (implementation) +
CC-BY (paper).
Status: v0.1.1 (root package.json / tags). Re-count tools from src/tools.ts.
Documentation map
| Doc | Role |
|---|---|
docs/mcp.md |
Full install, agent wiring, tool reference, troubleshooting |
docs/PARITY.md |
Website vs tools honesty matrix |
docs/SECURITY.md |
Capability tokens, BYOK, boundaries |
README.md |
npm front door |
Product docs/API.md |
Authoritative HTTP contract (common-thread repo) |
Commands
npm run typecheck
npm test
npm run build
npm start # node dist/index.js (stdio)
Auth model
- Create: no token; response includes
access_tokenonce. - Everything under
/investigations/:idneedsAuthorization: Bearer ct_…. - Pass token per tool arg or set
COMMON_THREAD_ACCESS_TOKEN+COMMON_THREAD_INVESTIGATION_ID. - Public host attribution: BYOK headers/body (
PUBLIC_BYOK_ONLY).
Conventions
- Conventional Commits; MIT.
- No em-dashes / en-dashes in prose.
VERSIONinsrc/version.tsmust matchpackage.json(test enforces).- Never log access tokens or BYOK keys.
- stdout = MCP JSON-RPC only; logs on stderr.
- User-Agent required on outbound fetch (Cloudflare bot filter).
Release
- Bump
package.json+src/version.tstogether. - PR to
main(aviation-grade). - Annotated tag
vX.Y.Zon main →publish-npm.ymlpublishes@skyphusion/common-thread-mcp.
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.
- 6d ago First seen · 53 lines · 449 tokens per session scan A a558cce6b49b
common-thread-mcp CLAUDE.md is an instructions file published in the GitHub repository skyphusion-labs/common-thread-mcp (0 stars, last pushed 2d ago), licensed MIT. It adds 449 tokens to every session, about $0.0022 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.
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