Retrieval:
- Add _fetch_adjacent() to retriever: fetches page ± 1 chunks from DB
after ranking so mid-sentence EPUB chunk boundaries don't lose context
- Fix vec DB doc-filter: oversample to top_k*20 before Python filter
instead of post-filtering an already-small global pool (fixes wrong-book
results when searching within a single document)
- top_k default 5 → 10; context per chunk 500 → 1500 chars; citation
snippet 200 → 400 chars
Artifact cleaning:
- Add scripts/text_clean.py: strips ABC Amber LIT Converter watermarks,
processtext.com URLs, bare page numbers, piracy stamps from extracted text
- Wire clean_paragraph() into ingest_pdf.py and new ingest_epub.py
Startup validation:
- _check_vec_schema() at boot: detects embedding dimension mismatch,
deletes stale vec DB, and queues sequential re-embed in background thread
- Sequential _reembed_docs() prevents SQLite lock races on startup re-embed
cf-orch integration:
- Wire CF_ORCH_URL / CF_LICENSE_KEY into LLMRouter backend config so
allocate() fires and keeps the Ollama model warm between requests
Ingestion progress UI:
- GET /api/library/{doc_id}/status now returns vec_count from page_vecs_meta
- DocumentCard.vue polls status every 3 s while processing and shows
two-phase progress: indeterminate animation during extraction,
determinate "Embedding N/M pages" bar once vectors start landing
Other:
- Chat feedback endpoint + thumbs up/down UI (FeedbackButton.vue)
- EPUB ingest script (ingest_epub.py) with heading-based chunking
- migration 002: chat_feedback table
- README.md with setup and feature overview
Citation dataclass gains bm25_score field populated from the retrieved
chunk. chat.py serializes it. api.ts interface updated to include it.
ChatView passes :bm25-score to CitationPanel so the Nat20 threshold
check in onMounted actually has data to evaluate.
- app/services/retriever.py: hybrid BM25 + semantic Retriever with BM25-only fallback when llm=None
- app/services/synthesizer.py: LLM answer synthesis with citation assembly over retrieved chunks
- app/api/chat.py: POST /api/chat endpoint with 402 gate when PAGEPIPER_OLLAMA_URL is unset
- tests/test_synthesizer.py: 3 TDD unit tests (mocked LLM, context building, system prompt)
- tests/test_chat_api.py: 2 integration tests (402 without Ollama, 200 with mocked retriever+LLM)
