ln-645-open-source-replacer

> **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 for existing dependencies) - Story-level optimality checks via OPT- prefix ## Input ``` - codebase_root: string # Project root - tech_stack: object # Language, framework, package manager, existing dependencies - output_dir: string # e.g., ".hex-skills/runtime-arti...