Conciseness

Much of the ~220-line body is genuinely specialized (tariff ratchets, PLC tag mechanics, basis risk quantification, stacked payback math), but it also explains concepts Claude already knows — 'LMP = Energy Component + Congestion Component + Loss Component', '1 REC = 1 MWh of renewable generation attributes', GHG Protocol Scope 2 basics — and the whole could be tightened. This fits the score-3 anchor (mostly efficient, some unnecessary explanation, could be tightened) rather than score 2, since the majority of tokens carry domain data rather than padding.

Actionability

For an instruction-only skill, guidance is fully executable: copy-paste-ready negotiation scripts ('ICE forward curves for 2027 are showing $42/MWh... your quote of $48/MWh reflects a 14% premium'), step-by-step ROI math ('Calculate current demand charges: Peak kW × demand rate × 12 months'), numeric decision thresholds, and a trigger/action/timeline escalation table. Specific worked examples (25-site PJM/ERCOT RFP, 500kW/2MWh battery payback, $35/MWh VPPA) cover the common cases, matching the score-5 anchor.

Workflow Clarity

'How It Works' gives a clear 6-step sequence, and the escalation table and performance-indicator red flags supply feedback checkpoints ('Wholesale prices exceed 2× budget assumption for 5+ consecutive days → ... Within 24 hours'). It falls short of score 5 because intermediate validation is implicit — e.g. verifying a bid model or budget forecast against actuals is referenced only via the after-the-fact KPI table, not as an explicit checkpoint inside the workflow.

Progressive Disclosure

Section structure is good (Role, When to Use, How It Works, Core Knowledge, Decision Frameworks, Edge Cases, Communication, Escalation, KPIs), but everything is inlined in one ~30KB SKILL.md with no bundle files at all. The ~90 lines of Core Knowledge (bill anatomy, market structures, PPA types) clearly belong in reference files. This matches the score-3 anchor (some structure, content that should be separate is inline) rather than score 2, since headers make it navigable and no references are buried or nested.

Specificity

The description lists multiple specific concrete actions — 'tariff and rate-schedule optimization, demand-charge mitigation, supplier RFPs, fixed/index/block-and-index hedging, renewable PPA and REC evaluation, and sustainability reporting' — comprehensively covering the procurement lifecycle. It matches the score-5 anchor (multiple specific actions, comprehensive coverage); it exceeds score 4 because coverage has no notable gaps.

Completeness

It explicitly answers both questions: a concrete 'what' (the full action list for electricity and natural gas across C&I facilities) and an explicit 'when' ('Use when procuring energy, optimizing utility tariffs, managing demand charges, evaluating PPAs, or building energy budgets and hedge strategies'). This matches the score-5 anchor with concrete trigger phrases; score 4 would require the 'when' to be less explicit, which it is not.

Trigger Term Quality

The 'Use when' clause includes good natural phrases — 'procuring energy, optimizing utility tariffs, managing demand charges, evaluating PPAs, or building energy budgets and hedge strategies' — that users would plausibly say. It falls short of score 5 because common variations are missing, e.g. 'reduce/lower electric bill', 'energy costs', 'utility bills', 'energy contract renewal', or mention of natural gas procurement in the trigger list.

Distinctiveness Conflict Risk

'Procure electricity and natural gas for commercial and industrial facilities' defines a clear niche with energy-specific triggers (tariffs, demand charges, PPAs, hedge strategies) that no generic skill would claim. Only a faint overlap risk exists with sustainability/ESG reporting skills via 'sustainability reporting', but the dominant triggers are distinct, matching the score-5 anchor.