Borrowing it
Nothing to install: this file belongs to quasi/cl-mcp-server. 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/quasi/cl-mcp-server/main/.claude/skills/integration/SKILL.mdgit clone --depth 1 https://github.com/quasi/cl-mcp-serverWrote 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/skills/quasi/cl-mcp-server/integration)<a href="https://agentmods.dev/skills/quasi/cl-mcp-server/integration"><img src="https://agentmods.dev/badge/skills/quasi/cl-mcp-server/integration/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/skills/quasi/cl-mcp-server/integration"><img src="https://agentmods.dev/badge/skills/quasi/cl-mcp-server/integration.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Agent Snooping · line 195 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 | $0.00029 | $0.01679 |
| Opus 5.5 | $0.00012 | $0.00672 |
| Sonnet 5.5 | $0.00006 | $0.00336 |
| Haiku 4.5 | $0.00003 | $0.00168 |
Grade A, and why
cl-mcp-server-integration 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.
How it starts
The opening of the file, as written. The whole thing — 198 lines — stays where its author put it; the contents beside it link to each section on GitHub.
cl-mcp-server — Integration Skill
A running SBCL process with a persistent REPL exposed as 36 MCP tools. Definitions accumulate across calls — defun in call 1 is callable in call 2.
Quick Start
Always call first:
tool: get-usage-guide
args: {}
Returns workflow guide with current best practices.
Minimal evaluation:
tool: evaluate-lisp
args: {"code": "(+ 1 2)"}
→ "=> 3"
Core Concepts
Persistent Session
State is global within a server process:
defun,defvar,defclass,ql:quickload→ persist for all subsequent callslet,let*bindings → scoped to one evaluationreset-sessionclears everything
Output Format
evaluate-lisp returns a text string with labeled sections:
[stdout]
Hello
[stderr]
WARNING: something
[Backtrace]
0: ...
=> 42
Only non-empty sections appear. Return value is always last.
Error Behavior
Errors do NOT crash the server. They return a formatted error string:
[ERROR] DIVISION-BY-ZERO
arithmetic error DIVISION-BY-ZERO signalled
Operation was (/ 1 0).
[Backtrace]
0: (/ 1 0)
...
isError: false in the MCP response even on Lisp errors. Check for [ERROR] prefix to detect failures.
Tool Categories
Full reference: .claude/skills/integration/references/tools-reference.md
| Category | Tools |
|---|---|
| Core evaluation | evaluate-lisp, compile-form, time-execution |
| Syntax | validate-syntax |
| Introspection | describe-symbol, apropos-search, macroexpand-form, who-calls, who-references |
| CLOS | class-info, find-methods |
| Error intelligence | describe-last-error, get-backtrace |
| Session | list-definitions, reset-session, configure-limits |
| ASDF | describe-system, system-dependencies, list-local-systems, find-system-file, load-system, load-file |
| Quicklisp | quickload, quicklisp-search |
| Profiling | profile-code, profile-functions, memory-report, allocation-profile |
| Telos | telos-list-features, telos-feature-intent, telos-get-intent, telos-intent-chain, telos-feature-members, telos-feature-decisions, telos-list-decisions |
| Workflow | get-usage-guide |
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 First seen · 198 lines · 29 tokens per session scan A 3d0f0ddb33f9
cl-mcp-server-integration is a skill published in the GitHub repository quasi/cl-mcp-server (43 stars, last pushed 8d ago), licensed MIT. It adds 29 tokens to every session and 1,679 once invoked, about $0.0001 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.
cl-mcp-server-integration compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| cl-mcp-server-integrationquasi/cl-mcp-server | Skill | 43 | 8d ago | MIT | A | 29 | Claude Code |
| imagegenopenai/codex | Skill | 133k | yesterday | Apache-2.0 | A | 113 | Codex |
| playwright-climicrosoft/playwright | Skill | 99k | yesterday | Apache-2.0 | A | 19 | Claude Code |
| local-ai-agentsmicrosoft/ai-agents-for-beginners | Skill | 79k | 4d ago | MIT | A | 200 | Claude Code, Codex |
| systematic-debuggingobra/superpowers | Skill | 313k | 3d ago | MIT | A | 21 | Claude Code |
| next-cache-components-adoptionvercel/next.js | Skill | 143k | yesterday | MIT | A | 95 | Claude Code |
| next-partial-prefetching-adoptionvercel/next.js | Skill | 143k | yesterday | MIT | A | 103 | Claude Code |