Conciseness

The core scoring tables, checklists, and data sources are dense and useful, but the ~540-line body repeats the same v2.0→v2.1 change commentary in at least four places ('Key Revisions in v2.1', 'Key Change in v2.1' under Phase 4, 'Summary: Essence of v2.1 Revision', 'Version History'/'Reason for v2.1 Revision'), and embeds time-stamped version metadata ('v2.0 (Oct 27, 2025)', 'v2.1 (Nov 3, 2025)') outside any deprecated/old-patterns section. This fits 'Mostly efficient but includes some unnecessary explanation or could be tightened' rather than 2, since the padding is confined to revision meta-commentary and the operational content itself is not padded with concepts Claude already knows.

Actionability

For an instruction-only skill the guidance is fully executable: exact numeric thresholds per indicator ('2 points: P/C < 0.70', 'VIX < 12 AND major index within 5% of 52-week high'), concrete collection commands ('web_search "FINRA margin debt latest"', source URLs), valid vs. invalid evidence examples, and a complete copy-paste output report template. It is not a 4 because the common cases are covered end-to-end with no gaps a reader would need to fill in.

Workflow Clarity

The process is a strictly ordered sequence with explicit validation checkpoints: Phase 1 data collection gated by '⚠️ CRITICAL: Do NOT proceed with evaluation without Phase 1 data collection', a confirmation-bias checklist before any qualitative points, self-check questions that force a score to 0, an implementation checklist, and a Common Failures section with ❌/✅ error-recovery examples. This matches the top anchor 'Clear sequence with explicit validation steps; feedback loops for error recovery; checklists for complex processes'.

Progressive Disclosure

All five referenced files exist (references/implementation_guide.md, bubble_framework.md, historical_cases.md, quick_reference.md, quick_reference_en.md) and are clearly signaled with a 'When to Load References' section — good one-level-deep structure. It is not a 5 because the bundle's scripts/bubble_scorer.py and its tests are never mentioned anywhere in SKILL.md, leaving an executable component undiscoverable, and a substantial amount of stage-by-stage action detail (Recommended Actions by Bubble Stage, composite short-selling conditions) is inlined that arguably belongs in the quick-reference files; it is not a 3 because the references that are used are clearly signaled and well-organized.

Specificity

The description lists multiple concrete capabilities with named instruments — 'Evaluates market bubble risk through quantitative data-driven analysis', 'Prioritizes objective metrics (Put/Call, VIX, margin debt, breadth, IPO data)', 'mandatory data collection and mechanical scoring' — which is comprehensive coverage of what the skill does. It is not a 4 because there are no real gaps: the analysis method, the specific metrics, the adjustment mechanism, and the output (scoring for investment decisions) are all explicitly stated.

Completeness

It explicitly answers both questions: the 'what' is concrete ('Evaluates market bubble risk... Prioritizes objective metrics (Put/Call, VIX, margin debt, breadth, IPO data)... mechanical scoring') and the 'when' is explicit with concrete trigger phrases ('Use when user asks about bubble risk, valuation concerns, or profit-taking timing'). It is not a 4 because the 'when' clause is already explicit and trigger-phrased, not merely implied or generic.

Trigger Term Quality

The 'Use when' clause covers natural phrases users would say — 'bubble risk', 'valuation concerns', 'profit-taking timing' — which are good trigger keywords. It is not a 5 because common variations users would naturally utter are missing, e.g. 'Are we in a bubble?', 'is the market overvalued/overheated', 'should I take profits', or 'market euphoria'; it is not a 3 because the terms present are genuinely natural rather than technical jargon and cover the skill's three main use cases.

Distinctiveness Conflict Risk

The bubble-detection niche is clear and 'bubble risk' triggers are distinct, matching the anchor 'Mostly distinct; minor overlap risk with closely related skills'. It is not a 5 because the broader triggers 'valuation concerns' and 'profit-taking timing' could also fire for generic valuation-analysis or investment-advice skills; it is not a 3 because the core framing (Minsky/Kindleberger bubble framework, named sentiment/leverage metrics) is unmistakably specific.