## QA PASSED See QA report document: 2c0de379-451c-4e82-97c4-a7ce4925908e **All hypotheses tested - no issues found:** 1. Table exists in schema (client/schema.py:471) 2. Columns have correct types (id, server_version, data, entity_counts, size_bytes, created_at) 3. Server init_database() creates table correctly 4. All Pydantic models (SnapshotData, SyncSnapshot, SnapshotCreateRequest, SnapshotResponse) serialize correctly 5. UNIQUE constraint on server_version enforced 6. Index idx_sync_snapshots_version created with DESC ordering **Regression testing:** 40/40 snapshot-related tests pass. Fix verified working.

Successfully implemented sync_snapshots table schema. ## Changes Made ### 1. client/schema.py (lines 471-495) Added table and index definitions: - SYNC_SNAPSHOTS_TABLE: Defines table with id, server_version (unique), data (compressed JSON), entity_counts, size_bytes, created_at - SYNC_SNAPSHOTS_INDEXES: Index on server_version DESC for efficient lookups - Updated init_database() (lines 587-588) to create table/index when include_server_tables=True ### 2. server/database.py (lines 55-66) Updated _ensure_server_tables() to import and execute: - SYNC_SNAPSHOTS_TABLE - SYNC_SNAPSHOTS_INDEXES Ensures table is created for existing databases on server startup. ### 3. server/models.py (lines 355-390) Added four Pydantic models: - SnapshotData: Validates full snapshot structure (issues, projects, milestones, etc.) - SyncSnapshot: Table record model with all fields - SnapshotCreateRequest: Request payload for creating snapshots - SnapshotResponse: Wrapper for snapshot responses ## Verification All changes tested successfully: - Table creation verified with include_server_tables=True - Server init_database() creates table correctly - All Pydantic models validate and serialize properly - Schema matches specification in issue description The foundation is now in place for snapshot creation/retrieval endpoints.