---
session_id: S-2026-0224-1032
timestamp: 2026-02-24T09:32:38Z
predecessor: S-2026-0224-0944
tasks_active: [T-261, T-262, T-263, T-265, T-266, T-267, T-268, T-269, T-270]
tasks_touched: [T-270, T-268, T-269, T-266, T-261, T-265, T-262, T-263, T-267, T-257, T-258, T-253, T-255, T-256, T-048, T-264, T-260, T-254, T-245, T-259]
tasks_completed: [T-264]
uncommitted_changes: 78
owner: claude-code
session_narrative: "Built 4 of 9 Q&A Phase 2 tasks: replaced LLM with Qwen3-14B + thinking toggle (T-262), upgraded RAG pipeline with 768-dim embeddings + chunk overlap + LRU cache (T-263), added marked.js/highlight.js streaming UX (T-266), built fw ask CLI keystone (T-264). Downloaded qwen3:14b model (9.3GB). Audit clean: 86 pass, 0 fail."
---

# Session Handover: S-2026-0224-1032

## Where We Are

Q&A Phase 2 build is well underway — 4 of 9 tasks completed this session. The LLM is now Qwen3-14B with thinking mode toggle (~33 tok/s vs 4.8), embeddings upgraded to 768-dim nomic-embed-text-v2-moe via Ollama, streaming UX uses proper markdown rendering, and `fw ask` CLI provides programmatic Q&A access. 5 tasks remain (T-265 saved answers, T-267 feedback, T-268 multi-turn, T-269 reranking, T-270 healing integration).

## Work in Progress

<!-- horizon: now -->

### T-261: "Q&A Phase 2 — model upgrade, RAG quality, framework integration, saved answers"
- **Status:** started-work (horizon: now)
- **Last action:** GO decision recorded. 4 of 9 child tasks completed (T-262, T-263, T-264, T-266).
- **Next step:** Continue building remaining tasks (T-265, T-267)
- **Blockers:** Owner: human (inception task, but GO already decided)
- **Insight:** Phase 2 build velocity is high — 4 tasks in one session

### T-262: "Replace LLM with Qwen3-14B + thinking mode toggle"
- **Status:** work-completed (horizon: now, partial-complete: human ACs pending)
- **Last action:** Replaced PRIMARY_MODEL, added should_think() classifier, streaming thinking tokens, frontend "Thinking... (Ns)" indicator
- **Next step:** Human verifies answer quality and thinking mode behavior in browser
- **Blockers:** None
- **Insight:** Qwen3-14B responds instantly with think=False, ~33 tok/s confirmed

### T-263: "RAG quick wins — prompt, embeddings, chunking"
- **Status:** work-completed (horizon: now, partial-complete: human ACs pending)
- **Last action:** Upgraded system prompt (anti-hallucination), switched to nomic-embed-text-v2-moe (768-dim) via Ollama, added 150-char chunk overlap, added LRU cache (207ms→0ms on cache hit)
- **Next step:** Human verifies answer quality improvement in browser
- **Blockers:** None
- **Insight:** nomic-embed-text-v2-moe was already installed (957MB), no download needed

### T-265: "Saved answers — curated Q&A for retrieval flywheel"
- **Status:** captured (horizon: now)
- **Last action:** Task created from conversation Q3 discussion
- **Next step:** Add Save button, POST endpoint, .context/qa/ directory
- **Blockers:** None
- **Insight:** Flywheel effect — saved answers become first-class retrieval sources

### T-266: "Streaming UX — marked.js, syntax highlighting, copy buttons"
- **Status:** work-completed (horizon: now, partial-complete: human ACs pending)
- **Last action:** Added marked.js + highlight.js + DOMPurify (all local), copy buttons on code blocks, debounced rendering at 100ms, citation styling
- **Next step:** Human verifies markdown rendering, syntax highlighting, copy buttons in browser
- **Blockers:** None
- **Insight:** highlight.js was already loaded from CDN — switched to local for offline capability

### T-267: "User feedback — thumbs up/down on Q&A answers"
- **Status:** captured (horizon: now)
- **Last action:** Task created referencing RQ-5 section 3
- **Next step:** Create web/qa_feedback.py + endpoints + UI buttons
- **Blockers:** None
- **Insight:** Keep buttons subtle and optional to avoid adoption friction

<!-- horizon: next -->

### T-268: "Multi-turn Q&A conversation"
- **Status:** captured (horizon: next)
- **Last action:** Task created referencing RQ-5 section 1
- **Next step:** Wait for model + RAG improvements to stabilize
- **Blockers:** EventSource to fetch is a one-way door — plan carefully
- **Insight:** Client-side history recommended over server-side sessions

### T-269: "Cross-encoder reranking with Qwen3-Reranker"
- **Status:** captured (horizon: next)
- **Last action:** Task created referencing RQ-2 section 1.1
- **Next step:** `ollama pull qwen3-reranker:0.6b`, then integrate into rag_retrieve()
- **Blockers:** Needs model downloaded
- **Insight:** 15-30% precision boost for 0.5GB VRAM — excellent ROI

### T-270: "Healing agent integration — semantic pattern matching via fw ask"
- **Status:** captured (horizon: next)
- **Last action:** Task created referencing RQ-4 sections 4 and 6
- **Next step:** Now unblocked — T-264 (fw ask CLI) is complete
- **Blockers:** None (T-264 dependency satisfied)
- **Insight:** Replaces 126 lines of fragile bash keyword matching with one semantic query

## Inception Phases

**1 inception task(s) pending decision** — run `fw inception status` for details.

## Gaps Register

**2 spec-reality gap(s) being watched** — see `.context/project/gaps.yaml`

- **G-004** [low]: Multi-agent collaboration untested
- **G-011** [low]: PostToolUse hooks are advisory-only — cannot block actions

Run `fw audit` to check if any trigger conditions are met.

## Decisions Made This Session

1. **nomic-embed-text-v2-moe over nomic-embed-text v1**
   - Why: v2-moe already installed (957MB), 768-dim same as v1, MoE architecture likely better quality
   - Rejected: nomic-embed-text v1 (would need separate download, same dimensions)

2. **Local JS libraries over CDN**
   - Why: Offline capability, no external dependency, consistent versions
   - Rejected: CDN (highlight.js was already CDN-loaded, switched to local)

## Things Tried That Failed

1. **T-263 verification `! grep -q` in shell** — the `!` negation doesn't work reliably in non-interactive shells. Fixed by using `python3 -c "assert ... not in open(...).read()"`.

2. **`grep -c ... | grep -q "^0$"` for zero-match check** — `grep -c` exits 1 when count is 0, causing pipe failure before grep -q runs. Same root cause as above.

## Open Questions / Blockers

1. T-262, T-263, T-266 have human ACs pending — verify in browser at `http://localhost:3000/search`
2. T-261 inception still shows as "pending decision" despite GO being recorded (owner: human)

## Gotchas / Warnings for Next Session

- Flask template caching — restart server after template edits (`kill PID; python3 -m web.app &`)
- Vector index rebuild takes ~90s with nomic-embed-text-v2-moe (12,514 chunks, 924 docs)
- Ollama model cold start takes ~20s for Qwen3-14B — first query may be slow
- The pre-push audit takes ~2 minutes — be patient or push in background
- `fw ask` requires Ollama + vector index to be available (not just web server)

## Suggested First Action

Start T-265 (saved answers) — simple task, no blockers, builds the knowledge flywheel. Or T-270 (healing agent integration) which is now unblocked by T-264.

## Files Changed This Session

- Created: lib/ask.py, lib/ask.sh, web/static/marked.min.js, web/static/purify.min.js, web/static/highlight.min.js, web/static/highlight-github-dark.min.css
- Modified: web/ask.py (model + prompt + thinking), web/embeddings.py (Ollama + overlap + cache), web/templates/search.html (marked.js + copy buttons + thinking UX), web/templates/base.html (local JS), bin/fw (ask route)

## Recent Commits

- cb251e7 T-264: fw ask CLI — synchronous RAG+LLM wrapper
- a315132 T-266: Streaming UX — marked.js, highlight.js, copy buttons, debounced rendering
- e2ee618 T-262: Replace LLM with Qwen3-14B + thinking mode toggle
- 4872fc7 T-263: RAG quick wins — prompt, embeddings, chunking, cache
- 8d32bf2 T-012: Fill handover S-2026-0224-0944 TODOs

---

## Handover Quality Feedback (for next session to complete)

- Did this handover help? [ ]
- What was missing?
- What was unnecessary?
