Borrowing it
Nothing to install: this file belongs to tweag/tricorder. 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/tweag/tricorder/main/CLAUDE.mdgit clone --depth 1 https://github.com/tweag/tricorderWrote 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/tweag/tricorder/claude-md)<a href="https://agentmods.dev/instructions/tweag/tricorder/claude-md"><img src="https://agentmods.dev/badge/instructions/tweag/tricorder/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/tweag/tricorder/claude-md"><img src="https://agentmods.dev/badge/instructions/tweag/tricorder/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 | $0.00357 | $0.00357 |
| Opus 5.5 | $0.00143 | $0.00143 |
| Sonnet 5.5 | $0.00071 | $0.00071 |
| Haiku 4.5 | $0.00036 | $0.00036 |
Grade A, and why
tricorder 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 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.
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 Code Plugin
The tricorder plugin provides a skill for checking build status from within Claude Code sessions.
See .claude-plugin/tricorder/INSTALL.md for installation instructions.
Dependencies and .cabal files
Never edit *.cabal files by hand — they are generated. The source of
truth is the Nix/hpack setup, and a pre-commit hook (nix-hpack) regenerates
the .cabal files and fails the commit if a checked-in .cabal has drifted
from its source. Hand edits are reverted on the next regeneration.
- Version bounds live in
nix/package/dependencies.nix(theconstraintsset). - Each package declares which dependencies its components (internal libraries,
executables, tests) use in that package's
package.nix(e.g.packages/tricorder/package.nix). - Modules are auto-discovered from the source tree — you do not list them.
To add or change a dependency:
- If the package isn't already in
nix/package/dependencies.nixconstraints, add it there with a version bound. - Add the dependency name to the relevant component's dependency list in that
package's
package.nix. - Regenerate the
.cabalfiles withnix-hpack(no args regenerates every package; or pass a package dir, e.g.nix-hpack ./tricorder). - Commit both the
package.nixand the regenerated.cabal.
See CONTRIBUTING.md for project conventions and workflow (mostly relevant for bigger tasks).
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 Changed · +2 tokens per session 0adbc4f7ec4e
- 2mo ago First seen · 35 lines · 355 tokens per session scan A 668f90116b8b
tricorder CLAUDE.md is an instructions file published in the GitHub repository tweag/tricorder (68 stars, last pushed yesterday), licensed MIT. It adds 357 tokens to every session, about $0.0014 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 2026-08-30.
tricorder CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| tricorder CLAUDE.mdtweag/tricorder | Instructions file | 68 | yesterday | MIT | A | 357 | Claude Code |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | yesterday | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |