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SKILL verified MIT Self-run

Curate

skill-mmusa-second-nature-curate · by mmusa

Score, merge, and prune the user's Claude Code skill library and pending Second Nature proposals — a curator pass that keeps the library sharp. Use when the user says "curate", "clean up my skills", "skill audit", or on a weekly schedule.

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Install

$ agentstack add skill-mmusa-second-nature-curate

✓ scanned · ✓ verified, works with Claude Code, Cursor, and more.

Security review

✓ Passed

No issues found. Passed automated security review. · v0.1.0 How review works →

  • ✓ Prompt-injection patterns
  • ✓ Secret / credential exfiltration
  • ✓ Dangerous shell & filesystem operations
  • ✓ Untrusted network calls
  • ✓ Known-malicious package signatures

What it can access

  • ✓ Network access No
  • ✓ Filesystem access No
  • ✓ Shell / process execution No
  • ✓ Environment & secrets No
  • ✓ Dynamic code execution No

From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.

View the full security report →

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Reliability & compatibility

✓ Security review passed
0 installs to date
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● 21d ago

Declared compatibility

Claude CodeClaude Desktop

Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.

Preview Execution monitoring

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About

Curate — keep the skill library sharp

Audit every skill the user has, score it, and propose keep / update / merge / retire actions. Present the report first; apply only what the user approves. Nothing is ever deleted — retired skills are archived.

Steps

1. Inventory

Collect from three places:

  • User skills: ~/.claude/skills/*/SKILL.md
  • Project skills: /.claude/skills/*/SKILL.md for the current project
  • Pending proposals: ~/.claude/second-nature/proposals/*/

Skip skills that belong to installed plugins/marketplaces (they update upstream; flag them only if broken). Identify plugin-owned skills by their path — only audit skills that live directly in the directories above.

2. Score each skill

For each, assess:

  • Usage — is it ever invoked? Search recent transcripts (~/.claude/projects/*/*.jsonl, last 60 days) for its name. Extract invocations cheaply with grep; do not read transcripts whole.
  • Staleness — do file paths, commands, tools, and URLs it references still exist? Check the load-bearing ones.
  • Overlap — does another skill cover the same ground? Candidates to merge.
  • Quality — vague descriptions (won't trigger reliably), missing trigger phrases, instructions that have drifted from how the user actually works now.

For pending proposals: flag any older than 30 days as promote-or-drop decisions.

3. Report, then act on approval

Present one table: skill, verdict (keep / update / merge / retire / promote-or-drop), and a one-line reason grounded in the evidence above. Recommendations only — then ask the user what to apply (they can approve all, some, or none).

For approved actions:

  • Retire — move the skill directory to ~/.claude/second-nature/retired/-/. Never rm.
  • Merge — write the combined skill, retire the absorbed one (same archive rule).
  • Update — edit the SKILL.md in place; keep the user's voice and format.
  • Drop proposal — move it to retired/ the same way.

Append every applied action to ~/.claude/second-nature/LOG.md (YYYY-MM-DD curate: retired — ).

4. Close

Summarize what changed and what was left alone. If the library is healthy, say so — a no-op curate is a valid result. Suggest (once, not naggingly) scheduling /harvest + /curate weekly if the user hasn't.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

Install and usage instructions live in the source repository linked above.

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Versions

  • v0.1.0 Imported from the upstream source.

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