tenet-performancelisted

# Tenet Performance — Performance Anti-Pattern Detection > Detects structural performance problems that cause latency spikes, memory bloat, and unnecessary resource consumption. Focuses on patterns that are reliably detectable through static analysis. ## Purpose This skill identifies performance anti-patterns that are detectable without runtime profiling. It scans for N+1 query patterns (loop + await query), synchronous I/O in hot paths, missing database indexes, unbounded queries, memory leaks, bundle size issues in frontend projects, and React re-render hazards. Findings are grounded in specific code locations with actionable fix_prompts. ## Language Support Matrix ```yaml support: native: [typescript, javascript, python] heuristic: [go, java, ruby] skip: [yaml, json, markdown, css, html, shell, terraform, dockerfile] ``` - **Native** (TS/JS/Python): Pattern matching with high confidence on async/await, ORM calls, React hooks, bundle config, event listener patterns. - **Heuristic** (Go/Java/Ruby): Grep-based detection of common patterns (database calls in loops, missing pagination). Lower confidence — all findings tagged `"confidence": "heuristic"`. ## Toolchain Inputs This skill does **not** consume `.healthcheck/toolchain/` outputs directly. It performs its own heuristic grep-based analysis on source files. It **does** read: - `.healthcheck/toolchain/language-census.json` — to determine which languages are present, which files to scan, and whether frontend-