ln-628-concurrency-auditor

> **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}`. # Concurrency Auditor (L3 Worker) **Type:** L3 Worker Specialized worker auditing concurrency, async patterns, and cross-process resource access. ## Purpose & Scope - Audit **concurrency** (Category 11: High Priority) - 7 checks: async races, thread safety, TOCTOU, deadlocks, blocking I/O, resource contention, cross-process races - Two-layer detection: grep finds candidates, agent reasons about context - Calculate compliance score (X/10) ## Inputs **MANDATORY READ:** Load `shared/references/audit_worker_core_contract.md`. Receives `contextStore` with: `tech_stack`, `best_practices`, `codebase_root`, `output_dir`. ## Workflow **MANDATORY READ:** Load `shared/references/two_layer_detection.md` for detection methodology. 1) **Parse context** -- extract tech_stack, language, output_dir from contextStore 2) **Per check (1-7):** - **Layer 1:** Grep/Glob scan to find candidates - **Layer 2:** Read 20-50 lines around each candidate. Apply check-specific critical questions. Classify: confirmed / false positive / needs-context 3) **Collect** confirmed findings with severity, location, effort, recommendation 4) **Calculate score** per `shared/ref...