v0.20.4 refine antigravity research skills

.agents/skills/antigravity-surface-adapter/SKILL.md

@@ -16,19 +16,20 @@ The Deep Research method still comes from this repo:
 - Follow `AGENTS.md` for evidence, source tiers, word budgets, pause points, and output hygiene.
 - Load project skills from `.agents/skills/*` as needed.
 - Write all artifacts under `projects/<slug>/`.
-- Keep claims traceable to source IDs in `sources.jsonl`.
+- Keep claims traceable through search receipts, source IDs, and `claims_ledger.jsonl`.
 
 ## Anti-Hallucination Contract
 
 This project treats Gemini-family research as high risk for false confidence. Follow these rules mechanically:
 
 1. No tool receipt, no search claim. Do not write "I searched", "confirmed", "official data shows", or similar unless the tool call happened and is recorded.
-2. No source ID, no factual claim. Every concrete fact needs a `source_id`.
+2. No source ID, no factual claim. Every concrete fact needs a `source_id` and claim-ledger entry.
 3. Search snippets are leads, not evidence. Open the original paper, filing, registry, patent, guideline, or company disclosure before citing.
 4. Failed access is a finding. Write that the source could not be opened; do not infer exact numbers from inaccessible pages.
 5. Log all searches in `phaseX/search_log.md` or `phaseX/search_log.jsonl`.
 6. Keep an `unsupported_claims` list. It is better to expose uncertainty than to make the report look complete.
-7. Before finishing each phase, sample at least 10 factual claims and verify that each has a source ID and opened source.
+7. Keep `continuation_state.json` current so a resumed Antigravity session can continue from artifacts, not chat memory.
+8. Before finishing each phase, sample at least 10 factual claims and verify that each has a source ID, opened source, evidence locator, and claim-ledger record.
 
 ## Antigravity Model Plan
 
@@ -64,32 +65,39 @@ uv run python scripts/dr.py finalize <slug> --no-pdf --no-docx
 ## Native Runbook
 
 1. Open the repository root in Antigravity.
-2. Start with Gemini 3 Flash as Research Manager. Load `.agents/agents.md`, this skill, `AGENTS.md`, `mckinsey-method`, `search-strategy`, `source-quality`, `evidence-table`, `citation-manager`, `length-budget`, and `output-hygiene`.
+2. Start with Gemini 3 Flash as Research Manager. Load `.agents/agents.md`, this skill, `AGENTS.md`, `method-selection`, `search-strategy`, `source-quality`, `evidence-table`, `research-quality-gates`, `citation-manager`, `length-budget`, and `output-hygiene`.
 3. Create or confirm `projects/<slug>/` and the phase folders. Use Python `init` only for scaffolding if helpful.
 4. Phase 0-1: ask the user to switch to Claude Opus 4.6 (Thinking). Produce:
 
 - `phase1/material_brief.md`
 - `phase1/framework.md`
+- `phase1/method_decision.md`
 - `phase1/research_brief.md`
 - `phase1/research_brief.json`
 - `phase1/search_log.md`
+- `phase1/assumptions.md`
 - `phase1/unsupported_claims.md`
 
 5. Pause for user confirmation.
 6. Phase 2: ask the user to switch to Gemini 3.1 Pro (Low). Build evidence packets and chapter drafts without Python model workers:
 
 - `phase2/task_cards.json`
-- `phase2/packets/*.json`
+- `phase2/search_log.jsonl`
 - `phase2/sources.jsonl`
+- `phase2/rejected_sources.jsonl`
+- `phase2/claims_ledger.jsonl`
+- `phase2/coverage_matrix.md`
+- `phase2/packets/*.json`
 - `phase2/chapter_briefs/*.json`
 - `phase2/compressed_findings/*.json`
 - `phase2/drafts/chXX.md`
-- `phase2/search_log.jsonl`
 - `phase2/unsupported_claims.md`
 
-7. Phase 3: ask the user to switch to Gemini 3.1 Pro (High). Produce `phase3/critique.md`, with explicit go/rework/fail decision and a source-audit table for at least 10 core facts.
+If a claim lacks support, use delta retrieval: write the gap, run targeted searches, update sources and the claim ledger, then either verify or visibly caveat the claim.
+
+7. Phase 3: ask the user to switch to Gemini 3.1 Pro (High). Produce `phase3/critique.md`, with explicit go/rework/fail decision, claim-ledger audit, contradiction audit, and a source-audit table for at least 10 core facts.
 8. Pause for user decision.
-9. Phase 4: ask the user to switch to Claude Opus 4.6 (Thinking). Produce `phase4/final_zh.md`, `phase4/editorial_notes.md`, and `phase4/final_fact_check.md`. Use deterministic renderers afterward for PDF/DOCX.
+9. Phase 4: ask the user to switch to Claude Opus 4.6 (Thinking). Produce `phase4/final_zh.md`, `phase4/editorial_notes.md`, and `phase4/final_fact_check.md`. New facts require new receipts and claim-ledger rows. Use deterministic renderers afterward for PDF/DOCX.
 
 ## Search Strategy