SQLite-backed local snapshot store

workplans/MKTT-WP-0007-advanced-query-and-local-index-backend.md

@@ -51,7 +51,7 @@ directly and should report actual refresh work against the same categories.
 
 ```task
 id: MKTT-WP-0007-T001
-status: todo
+status: done
 priority: high
 state_hub_task_id: "8894a9a4-586c-457b-b4e6-add8276ff5f2"
 ```
@@ -59,6 +59,10 @@ state_hub_task_id: "8894a9a4-586c-457b-b4e6-add8276ff5f2"
 Persist parsed document snapshots and source metadata in a local cache
 directory.
 
+Implemented: `LocalSnapshotStore`, SQLite schema initialization, source-state
+loading, parsed document JSON persistence, provenance envelope storage, and
+relative path handling. See `docs/local-index-backend.md`.
+
 Implementation hints:
 
 - Persist `SnapshotState` fields in the snapshot/source tables.
@@ -71,7 +75,7 @@ Implementation hints:
 
 ```task
 id: MKTT-WP-0007-T002
-status: todo
+status: done
 priority: high
 state_hub_task_id: "fb9eaa9d-5c20-49a9-a7a6-acae28ac5e20"
 ```
@@ -86,6 +90,9 @@ mkt ast stats <file>
 Use the current parsed document and token model. Do not require cache presence
 for single-file use.
 
+Implemented: `mkt ast show <file>` and `mkt ast stats <file>` with JSON, YAML,
+tree/text output modes.
+
 ## P7.3 - Add optional JSONPath query adapter
 
 ```task
@@ -102,7 +109,7 @@ shared query result envelope.
 
 ```task
 id: MKTT-WP-0007-T004
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "479f11a3-4ab4-451b-991c-7f143f2bffea"
 ```
@@ -121,6 +128,11 @@ Implementation hints:
 - Preserve source spans and content-unit ids from WP-0010 reference/literate
   layers.
 
+Implemented: source, heading, section, block, dependency, and metadata tables;
+document/frontmatter/metrics/provenance JSON payloads; hot-path indexes on
+path, content hash, snapshot id, parser identity, unit path, and dependency
+target.
+
 ## P7.5 - Add FTS5 section/block search
 
 ```task
@@ -137,7 +149,7 @@ relevance ranking.
 
 ```task
 id: MKTT-WP-0007-T006
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "7d9472e6-0716-435b-866c-d2c66ad786cf"
 ```
@@ -156,6 +168,11 @@ Implementation hints:
 - Report planned vs actual counts for hash, parse, index, metadata update,
   delete, and invalidation work.
 
+Implemented first pass: `LocalSnapshotStore.build()` drives refresh from
+`SnapshotRefreshPlan`, hashes metadata-changed files by default, skips
+unchanged content, updates metadata-only rows, refreshes changed snapshots, and
+deletes removed files.
+
 ## P7.7 - Add local index CLI
 
 ```task
@@ -174,6 +191,10 @@ mkt cache query <selector-or-query>
 mkt search <text>
 ```
 
+Partial implementation: `mkt cache init` initializes the local SQLite store and
+`mkt cache index <path>` builds or refreshes it. Cache-backed query and FTS
+search remain part of this task.
+
 ## Exit Criteria
 
 - Legacy AST/JSONPath value is recovered as an optional backend.