df857923d4
Single binary, three backends (Postgres/SQLite/MySQL) autodetected from DATABASE_URL scheme. Sequential .sql migrations tracked in _kei_migrations with SHA-256 checksums. Commands: kei-migrate up — apply pending kei-migrate down [n] — revert last N (requires .down.sql) kei-migrate status — list applied vs pending kei-migrate create <name> — scaffold up+down pair with UTC ts Constructor Pattern: 10 source files, all <90 LOC, functions <30 LOC. Deps: sqlx 0.8 (any+postgres+sqlite+mysql, rustls), clap 4, chrono, sha2, anyhow, tokio. Tests: 9/9 passing (cargo test, SQLite backend). Clippy clean: cargo clippy --all-targets -- -D warnings. Safety features: - checksum drift detection on applied migrations - IRREVERSIBLE marker blocks down-revert - duplicate version detection at scan time - each migration in its own transaction Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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