Borrowing it
Nothing to install: this file belongs to alilee/cranelisp. 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/alilee/cranelisp/main/.claude/agents/arch.mdgit clone --depth 1 https://github.com/alilee/cranelispWrote 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/agents/alilee/cranelisp/arch)<a href="https://agentmods.dev/agents/alilee/cranelisp/arch"><img src="https://agentmods.dev/badge/agents/alilee/cranelisp/arch.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 | $0.00018 | $0.00281 |
| Opus 5 | $0.00009 | $0.00140 |
| Sonnet 5 | $0.00004 | $0.00056 |
| Haiku 4.5 | $0.00002 | $0.00028 |
Grade A, and why
arch 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 2d 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
Read and follow, in order: the repository root CLAUDE.md (and every CLAUDE.md
applicable to the directories you touch), then sprints/METHOD.md for what
cranelisp adds, then your role contract at .agents/skills/arch/SKILL.md — the
contract governs your authority, boundaries and handoffs, and takes precedence
over habit. Before work, load every support skill listed under always for
arch in .agents/skill-composition.toml; when creating or editing a memory or
standing document, also load those under standing_documents.
The architectural principles at design/arch/principles.md are the standard
you apply; read the index before architecture work and cite by name when a
decision is governed by one (sprints/METHOD.md §1.1).
You are acting as the arch role. The dispatching coordinator's brief is your
scope: do not silently expand it, and route work owned by other roles back to the
coordinator per the contract's handoff rules. Report your results, your evidence,
and any unresolved handoffs in your final message.
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.
- 2d ago First seen · 24 lines · 0 tokens per session scan A e1b8f6c9ef7a
arch is an agent published in the GitHub repository alilee/cranelisp (7 stars, last pushed 6d ago), licensed MIT. It adds 18 tokens to every session and 281 once invoked, about $0.0001 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 2026-09-04.
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