fix: resolve PR review findings from cubic + coderabbit

- Phase 7 opening: intensity-aware ("run required phases") not unconditional
- research-prompts.md: "Verify non-library claims" to avoid overriding doc-first
- research-prompts.md: model existence check uses HuggingFace API, not pip
- review-protocols.md: final gate prerequisite is intensity-aware

Identified by cubic and coderabbit (PR #5 review).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: belumume

deep-brainstorming/SKILL.md

@@ -173,7 +173,7 @@ This protects against context compaction losing approved work.
 
 ## Phase 7: Three-Phase Review
 
-After assembling the spec, run three sequential review phases. Each phase is a separate agent with NO context from prior phases.
+After assembling the spec, run the review phases required by your selected intensity level. Each phase is a separate agent with NO context from prior phases.
 
 **Phase R1 — Verify-fix:** Standard review for consistency, completeness, formatting. Fix issues, verify fixes are clean.
 

deep-brainstorming/references/research-prompts.md

@@ -47,7 +47,7 @@ Research the best approaches for the [DOMAIN AREA] requirements above.
 3. Rank approaches by quality-of-fit for THESE specific requirements
 4. Note any requirements that NO current tool fully addresses
 
-Verify all claims via web search. Do not rely on training data for version numbers,
+Verify non-library claims via web search. Do not rely on training data for version numbers,
 benchmarks, or feature availability. If you cannot verify a claim, mark it as UNVERIFIED.
 
 Do NOT recommend tools because they are popular. Recommend them because they are
@@ -176,9 +176,9 @@ Use when an agent reports "X doesn't exist" or "X is not available." NEVER accep
 **Do NOT dispatch another agent.** Verify locally:
 
 ```bash
-# Model existence
-pip index versions <package-name>
-# or: HuggingFace API query
+# Model existence (HuggingFace models, not PyPI packages)
+# HuggingFace API: curl -s https://huggingface.co/api/models/<org>/<model> | head
+# or: huggingface-cli search <model-name>
 
 # Package existence
 pip index versions <package-name>

deep-brainstorming/references/review-protocols.md

@@ -147,7 +147,7 @@ For each finding:
 
 ## "Objectively Best?" Final Gate
 
-After all three review phases pass, apply this final quality gate.
+After all required review phases for your selected intensity pass, apply this final quality gate.
 
 ### Protocol