aiti-doc-center

workspace markdown collection/organization/search extension: node:sqlite FTS5 trigram Chinese full-text search + Obsidian-compatible tag system + 📚 float dialog with four views + tag tree.

• tag seven-source two-layer: 5 static sources (front-matter / inline #tag anywhere / path-derived / UI write-back / manual tags added in the doc center — non-md files can be tagged via 🏷 too) + 2 dynamic sources (plan-first plan binding → the "Plan" tag, session-manager vocabulary session tag inheritance); the dynamic layer is joined in memory.
• All Sessions tag tree = the system's unified vocabulary: AI tagging / UI completion / plan-first vocabulary all defer to it first.
• Associated sessions: via services.trace (the git-trace ledger), reverse-lookup the sessions a document has touched; archived-session linkage (.pwarc archive rows are searchable too).
• Service outlet aiti-doc-center.docs, six methods: tagsAll/search/query/searchFull/docsOfSession/sessionsOfDoc — consumers aiti-plan-first, aiti-folder, session-manager.
• Service consumption: aiti-git-trace.trace, session-manager.tags/sessions, aiti-plan-first.plans.
• AI tools: aiti_doc_search (FTS full-text + weight-fused ranking, with snippet) and aiti_doc_tags_set (writes tags back into front-matter) — off by default (enable via agentTools.enabled); there is also a doc-search skill that goes through GET /search.
• On the plan-first side, the "🏷 Add tags" and "Update plan doc" one-click inserts both go through this extension's vocabulary and search.