- Security: REVOKE ALL FROM PUBLIC + GRANT EXECUTE (authenticated,
service_role) on the match RPCs so anon can't read a KB by supplying
an account_id (mirrors migrations 018/025).
- Ingest: store chunks even when embedding fails (insert first, rethrow
after) so a doc stays lexically searchable; the "lexical still works"
warning is now truthful.
- Retrieval: short-circuit on an empty KB (cheap COUNT) to avoid a paid
query embedding + 2 RPCs on every draft/auto-reply.
- Migration: HNSW instead of IVFFlat (robust on small/growing tables);
language-neutral 'simple' FTS config (was 'english'); semantic RPC
takes text and casts ::vector(1536) to remove PostgREST bind ambiguity.
- Embeddings key: distinguish corrupt-from-absent (loadEmbeddingsKey
returns {key,corrupt}); log on decrypt failure; reindex now reports
failure instead of false success; POST/PATCH warn on keyword-only save.
- embedTexts: fail loud when the provider omits result indices (was
silently misaligning chunks with vectors).
Tests: +3 (empty-KB guard, embed-failure-still-indexes, missing-index).
587 pass; typecheck/lint/build green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Grounds the AI assistant (0.5.0) in the account's own content so it can
answer instead of handing off.
- Hybrid retrieval: Postgres full-text search for every account; optional
semantic search (pgvector + OpenAI text-embedding-3-small) when an
embeddings key is set. Semantic-primary, topped up with FTS.
- src/lib/ai: chunk, embeddings, knowledge (ingest + retrieve), query;
buildSystemPrompt gains a knowledge block; config carries an
(optional) embeddings key.
- Wired into /api/ai/draft and the auto-reply bot (best-effort — never
blocks a reply).
- KB API (/api/ai/knowledge CRUD + /reindex) and a Settings → AI
Assistant knowledge-base manager + embeddings-key field.
- Migration 030: pgvector, ai_knowledge_documents, ai_knowledge_chunks
(fts + embedding), match RPCs, ai_configs.embeddings_api_key.
Migration required: supabase/migrations/030_ai_knowledge.sql.
Stacked on feat/ai-reply-assistant (#329).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
