cloudflare-d1

SKILL.md

Status: Production Ready ✅ Last Updated: 2026-01-20 Dependencies: cloudflare-worker-base (for Worker setup) Latest Versions: wrangler@4.59.2, @cloudflare/workers-types@4.20260109.0

| Statement too long | Large INSERT with 1000+ rows | Break into batches of 100-250 using batch() | | Network connection lost | Transient failure or large import | Implement retry logic (see below) or break into smaller chunks | | Too many requests queued | Individual queries in loop | Use batch() instead of loop |

| D1TYPEERROR | Using undefined in bind | Use null for optional values: .bind(email, bio \|\| null) | | Transaction conflicts | BEGIN TRANSACTION in migration | Remove BEGIN/COMMIT (D1 handles automatically) | | Foreign key violations | Schema changes break constraints | Use PRAGMA deferforeignkeys = true |

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