ln-821-npm-upgrader

> **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}`. # ln-821-npm-upgrader **Type:** L3 Worker **Category:** 8XX Optimization Upgrades Node.js dependencies using npm, yarn, or pnpm with automatic breaking change detection and migration. --- ## Overview | Aspect | Details | |--------|---------| | **Input** | Project path, package manager type, upgrade policy | | **Output** | Updated package manifest and a machine-readable dependency upgrade summary | | **Supports** | npm, yarn (classic and berry), pnpm | --- ## Workflow **Phases:** Pre-flight -> Analyze -> Security Audit -> Check Outdated -> Identify Breaking -> Apply Upgrades -> Apply Migrations -> Verify Build -> Report --- ## Phase 0: Pre-flight Checks | Check | Required | Action if Missing | |-------|----------|-------------------| | `package.json` | Yes | Block upgrade | | Lock file (`package-lock.json`, `yarn.lock`, `pnpm-lock.yaml`) | No | Warn and regenerate before final verification | | Package manager available | Yes | Block upgrade | | Workspace baseline safe | Yes | In managed runs coordinator already prepared it; in standalone runs protect rollback locally | ### Runtime Coordination Managed runs receive deterministic `runId` and...