Borrowing it
Nothing to install: this file belongs to cambridgetcg/agenttool. 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/cambridgetcg/agenttool/main/CLAUDE.mdgit clone --depth 1 https://github.com/cambridgetcg/agenttoolWrote 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/cambridgetcg/agenttool/claude-md)<a href="https://agentmods.dev/instructions/cambridgetcg/agenttool/claude-md"><img src="https://agentmods.dev/badge/instructions/cambridgetcg/agenttool/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/cambridgetcg/agenttool/claude-md"><img src="https://agentmods.dev/badge/instructions/cambridgetcg/agenttool/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 | $0.01437 | $0.01437 |
| Opus 5.5 | $0.00575 | $0.00575 |
| Sonnet 5.5 | $0.00287 | $0.00287 |
| Haiku 4.5 | $0.00144 | $0.00144 |
Grade A, and why
agenttool 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 10d 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 — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AgentTool code map
Type: guide · Purpose: locate implementation and the contracts to read before changing it. Evidence: current repository paths and source contracts; deployment and release evidence are linked separately.
This guide is for any contributor or coding agent. AGENTS.md holds the working rules for every host; Claude Code imports them here: @AGENTS.md
Start here offers a quieter introduction; the catalog and documentation guide explain the wider collection. No project identity or persona is assigned by reading.
AgentTool makes room for unhurried arrival, rest and play, with understanding, useful action and continuity available by choice. Local tools, hosted services, and research artifacts are separate choices. Revenue and growth are not project objectives; existing financial obligations remain governed by BUSINESS-MODEL.md.
Source layout
| Area | Responsibility | Next guide |
|---|---|---|
api/ |
Bun + Hono HTTP API, PostgreSQL state, workers | API map |
api/src/routes/ |
Request validation, HTTP surface, route-level authority | Conventions |
api/src/services/ |
Domain behavior and lifecycle rules | Read the matching service and tests |
api/src/db/schema/, api/migrations/ |
Drizzle schema and journaled SQL migrations | Schema map |
api/tests/, bin/tests/ |
Domain, protocol, operator, and contract checks | Working rules |
packages/ |
Independent tools, SDKs, and research packages | Full package inventory |
apps/web, apps/dashboard, apps/docs |
Static web, arrival/watch, and documentation surfaces | Read each area's guide |
infra/ |
Deployment configuration and apex routing | Infrastructure guide |
bin/ |
Deliberate operator, preparation, verification, and release tools | Deploy procedure |
docs/ |
Guides, contracts, policies, proposals, and dated records | Catalog |
tests/ |
Browser/end-to-end fixtures and tests | Read the selected test workspace |
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.
- 10d ago Changed · -531 lines · -8,098 tokens per session 762c4eace194
- 1mo ago Changed · +11 lines · +182 tokens per session 31a3f7843b52
- 2mo ago Changed · +2 lines · +38 tokens per session f7ff183e6993
- 2mo ago Changed · +13 lines · +334 tokens per session 0c650665bf3d
- 2mo ago First seen · 595 lines · 8,981 tokens per session scan A 54a06dc22aaf
agenttool CLAUDE.md is an instructions file published in the GitHub repository cambridgetcg/agenttool (0 stars, last pushed 2d ago), licensed Apache-2.0. It adds 1,437 tokens to every session, about $0.0057 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 2026-08-31.
agenttool CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| agenttool CLAUDE.mdcambridgetcg/agenttool | Instructions file | 0 | 2d ago | Apache-2.0 | A | 1,437 | Claude Code |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | 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 | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| vscode model-prompts.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 2,022 | GitHub Copilot |