ln-645-open-source-replacer
Discovers custom modules replaceable by OSS, evaluates alternatives (stars, license, CVE), generates migration plan. Use when reducing custom code.
npx skills add majiayu000/claude-skill-registry --skill ln-645-open-source-replacer-levnikolaevich-claude-code-skills-2 --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
> **Paths:** File paths (`shared/`, `references/`, `../ln-*`) are relative to skills repo root. If not found at CWD, locate this SKILL.md directory and go up one level for repo root. If `shared/` is missing, fetch files via WebFetch from `https://raw.githubusercontent.com/levnikolaevich/claude-code-skills/master/skills/{path}`. # Open Source Replacer **Type:** L3 Worker L3 Worker that discovers custom modules, analyzes their purpose, and finds battle-tested open-source replacements via MCP Research. ## Purpose & Scope - Discover significant custom modules (>=100 LOC, utility/integration type) - Analyze PURPOSE of each module by reading code (goal-based, not pattern-based) - Search open-source alternatives via WebSearch, Context7, Ref - Evaluate alternatives: stars, maintenance, license, CVE status, API compatibility - Score replacement confidence (HIGH/MEDIUM/LOW) - Generate migration plan for viable replacements - Output: markdown evidence report in runtime artifacts plus machine-readable JSON summary for coordinator transport **Out of Scope:** - Pattern-based detection of known reinvented wheels (custom sorting, hand-rolled validation) - Package vulnerability scanning (CVE/CVSS f
- Purpose & Scope
- Input
- Workflow
- Phase 1: Discovery + Classification
- Phase 2: Goal Extraction
- Phase 3: Alternative Search (MCP Research)
- Phase 4: Evaluation
- Phase 5: Write Report + Migration Plan
- Phase 6: Return Summary
- Scoring
- Critical Rules
- Definition of Done
- Reference Files
What does the ln-645-open-source-replacer skill do?
Discovers custom modules replaceable by OSS, evaluates alternatives (stars, license, CVE), generates migration plan. Use when reducing custom code.
How do I install it?
Run `npx skills add majiayu000/claude-skill-registry --skill ln-645-open-source-replacer-levnikolaevich-claude-code-skills-2 --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From majiayu000/claude-skill-registry, a repository with 534 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.