69a6ade107
## What - Idempotency cache for write deduplication with SHA256 body hashing - Query coalescing for identical concurrent search requests - Config options for TTL, max entries, coalescing window, max subscribers ## Why HTTP retries, SDK retry loops, and at-least-once delivery produce duplicate writes. Hot identical search queries waste caching opportunities. ## Details - Accept Idempotency-Key header for writes - Return cached mtask ID on hit, 409 conflict on key reuse with different body - Query fingerprint includes canonical JSON + index UID + settings version - Settings change invalidates in-flight coalesce (settings_version in fingerprint) - 50ms default coalescing window closes at response time Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com> |
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