Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/dbreunig/plumb/claude-mdgit clone --depth 1 https://github.com/dbreunig/plumbWhat 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 | $0.00300 | $0.00300 |
| Opus 5 | $0.00150 | $0.00150 |
| Sonnet 5 | $0.00060 | $0.00060 |
| Haiku 4.5 | $0.00030 | $0.00030 |
Grade A, and why
plumb 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.
The source is not reproduced here
No licence file
A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.
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 · 28 lines · 300 tokens per session scan A 7c5b51ee081f
plumb CLAUDE.md is an instructions file published in the GitHub repository dbreunig/plumb (147 stars, last pushed 4d ago), with no licence file. It adds 300 tokens to every session, about $0.0015 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 2026-08-30.
Other instructions, from other repositories
OpenSpec-practise CLAUDE.md
Instructions for ForceInjection/OpenSpec-practise, covering claude.md, project overview, repository architecture, layered architecture and common commands.
spec-kit-archive copilot-instructions.md
Instructions for stn1slv/spec-kit-archive, covering fixture project — copilot instructions, active technologies and recent changes.
prospec AGENTS.md
Instructions for benwu95/prospec, covering prospec, tech stack, language policy, core resources and constitution.
prospec CLAUDE.md
Instructions for benwu95/prospec, covering prospec, tech stack, language policy, core resources and constitution.
spec-manager CLAUDE.md
Instructions for loki-ai-ch/spec-manager, covering claude.md, spec-driven development — no vibe coding, build & test commands, architecture and source layout.
spec-manager AGENTS.md
Instructions for loki-ai-ch/spec-manager, covering spec-manager workflow capsule, mandatory workflow and common commands.