b659a6a6bd
- Create .claude/rules/ with all 17 standard rule files (01-security through 17-document-imports) - Add Operational Rules section with Rule Index to .claude/CLAUDE.md
26 lines
1 KiB
Markdown
26 lines
1 KiB
Markdown
---
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paths:
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- "src/**/*.{ts,js,py,go,rs,dart,kt,java}"
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- "lib/**/*.{ts,js,py,go,rs,dart,kt,java}"
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- "app/**/*.{ts,js,py,go,rs,dart,kt,java}"
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---
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# Performance Awareness
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Prevent anti-patterns that are expensive to fix later — not premature optimization.
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## Flag Proactively
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- **N+1 queries** — fetching a list then querying individually per item.
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- **Unbounded fetches** — no pagination or limits.
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- **O(n^2) when O(n) exists** — nested loops, repeated scans, quadratic string building.
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- **Loading into memory** — entire files/datasets when streaming is possible.
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- **Missing indexes** — unindexed columns in tables expected to grow beyond 10k rows.
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- **Synchronous blocking** — blocking event loop/main thread during I/O.
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- **Connection pool exhaustion** — new connections per request instead of pooling.
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- **Unverified slow queries** — use EXPLAIN/EXPLAIN ANALYZE; don't guess about indexes.
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## Rules
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- Flag anti-patterns and offer to fix or create a TODO.
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- Quantify: "loads ~10MB per request" not "might use a lot of memory."
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