cl-mcp: Skill for Claude Code

.claude/skills/dogfooding-cl-mcp/SKILL.md

dogfooding-cl-mcp is a skill for Claude Code from cl-ai-project/cl-mcp. It costs 42 tokens per session (4,425 once invoked), scanned A, original, MIT.

A structured trial of cl-mcp, a set of tools for Common Lisp development, by using it to build a disposable medium-sized project from start to finish. The project is only used to expose practical problems and collect feedback.

In plain words
What is it for?
Use it to stress-test cl-mcp, record retries and surprising behavior, verify changes in practice, and produce concrete feedback for future improvements.
Why use it?
Abstract review may miss confusing errors and awkward workflows. Trying the tools on a realistic throwaway project reveals where they need improvement without putting a real project at risk.

Skill for Claude Code

Written for Claude Code: installed under .claude/.

This is cl-ai-project/cl-mcp's own configuration. It tells Claude Code how to work on cl-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything cl-mcp configures →

Reuse

Borrowing it

Nothing to install: this file belongs to cl-ai-project/cl-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.

Copy the file
curl -O https://raw.githubusercontent.com/cl-ai-project/cl-mcp/main/.claude/skills/dogfooding-cl-mcp/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/cl-ai-project/cl-mcp

Made for: Claude Code.

Wrote this? Show the measurements

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agentmods badge for dogfooding-cl-mcp

README.md
[![agentmods](https://agentmods.dev/badge/skills/cl-ai-project/cl-mcp/dogfooding-cl-mcp/github.svg)](https://agentmods.dev/skills/cl-ai-project/cl-mcp/dogfooding-cl-mcp)
Your own site
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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.

agentmods 80×15 button for dogfooding-cl-mcp

Your own site · 80×15
<a href="https://agentmods.dev/skills/cl-ai-project/cl-mcp/dogfooding-cl-mcp"><img src="https://agentmods.dev/badge/skills/cl-ai-project/cl-mcp/dogfooding-cl-mcp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,425 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00042 $0.04425
Opus 5 $0.00021 $0.02212
Sonnet 5 $0.00008 $0.00885
Haiku 4.5 $0.00004 $0.00443

Measured 13d ago against content hash 7e1a11ff16dd, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

dogfooding-cl-mcp 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 13d 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.

.claude/skills/dogfooding-cl-mcp/SKILL.md · 231 lines

How it starts

The opening of the file, as written. The whole thing — 231 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Dogfooding cl-mcp

Overview

Build a real mid-size Common Lisp project with cl-mcp's own tools, watching for every rough edge along the way. The point is not the project — it is the feedback. Every retry, every confusing error, every tool that surprises you goes into the feedback file.

Core principle: Cheap, disposable projects that exercise the full cl-mcp tool surface produce better feedback than abstract review. Build, notice friction, record it, throw it away.

When to Use

  • User asks for dogfooding, feedback collection, or "try cl-mcp on a real project"
  • You want to verify a recent cl-mcp change works in practice, not just in unit tests
  • You are looking for P1/P2/P3-level improvement candidates to feed into the next PR cycle

Do NOT use for: scaffolding a project the user actually wants to keep, or for unrelated CL work.

Workflow

1. Workspace setup

Scaffold projects live under experiments/ inside the cl-mcp checkout. This directory is listed in .gitignore, so generated files never appear in git status and cannot be committed by accident. No project-root switching is needed.

fs-set-project-root path=.            # ensure project root is cl-mcp
fs-get-project-info                    # confirm

Hydrate deferred tool schemas before any tool call with boolean/integer parameters. Without this, calls like load-system force=true or inspect-object id=N will fail with misleading must be boolean/must be integer errors (harness-side issue, not cl-mcp):

ToolSearch select:mcp__cl-mcp__lisp-read-file,mcp__cl-mcp__load-system,mcp__cl-mcp__repl-eval,mcp__cl-mcp__inspect-object,mcp__cl-mcp__lisp-edit-form,mcp__cl-mcp__clgrep-search,mcp__cl-mcp__code-find,mcp__cl-mcp__code-describe,mcp__cl-mcp__code-find-references,mcp__cl-mcp__pool-kill-worker

2. Scaffold with project-scaffold

Call project-scaffold once with destination: "experiments". Save the response — note the absolute_path, the files list, and the framework it echoes back.

Read the full file on GitHub · 231 lines

Changes

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.

  1. 13d ago First seen · 231 lines · 42 tokens per session scan A 7e1a11ff16dd

Subscribe to this mod's changes

dogfooding-cl-mcp is a skill published in the GitHub repository cl-ai-project/cl-mcp (84 stars, last pushed yesterday), licensed MIT. It adds 42 tokens to every session and 4,425 once invoked, about $0.0002 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.

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