release: v0.20 Codex-ready skill-driven core

skills/deep-research/SKILL.md

@@ -25,6 +25,7 @@ Deep Research is driven by the repository Python core, not by chat context. Trea
 6. Run Phase 2 with file-backed task cards and packets:
    `uv run python scripts/dr.py research <slug> --workers 6 --execute-packets --allow-search-fallback`
 7. Build briefs and chapters only from persisted packets:
+   `uv run python scripts/dr.py sources cache <slug> --limit 50`
    `uv run python scripts/dr.py research <slug> --build-briefs`
    `uv run python scripts/dr.py research <slug> --assemble-chapters --workers 4`
 8. Review and finalize through Python:
@@ -37,6 +38,7 @@ Deep Research is driven by the repository Python core, not by chat context. Trea
 - Do not invent evidence when model/API access fails. Stop at the last durable artifact and report the exact blocker.
 - Phase 2 concurrency must use task cards and packet files, not platform subagents as the default mechanism.
 - Search must use the project Python gateway (`scripts/search.py` / `scripts.lib.search_client`) by default. Do not use Tavily MCP, browser MCP, or platform-native web search in subagents unless the user explicitly requests that escape hatch.
+- Key Tier 1-2 sources such as ICH Q9/Q10, EU GMP Annex 1, FDA guidance/warning letters, EMA/NMPA/WHO pages, and pharmacopeia materials should be cached as local Markdown snapshots under `phase2/source_cache/` before chapter assembly.
 - User materials are starting evidence, not final truth. Cross-check against authoritative sources such as NMPA, FDA, EMA, ICH, WHO, pharmacopeias, and recognized best-practice references.
 - For GMP/quality/operations diagnosis, prefer `--method gmp_quality_operations_diagnosis`.
 - Chapter drafts are not acceptable if they merely summarize principles. Each section must turn evidence into concrete findings, risk implications, and整改动作；otherwise return to Phase 2 enrichment.