Conciseness

The body is lean and mostly executable: 'uv run python scripts/spreads.py SYMBOL --strategy STRATEGY --expiry YYYY-MM-DD [options]' plus four concrete per-strategy invocations, with no padding about what options or spreads are. The one-line parentheticals like '(long call + long put at same strike)' and '(bull/bear call/put spread)' restate standard finance knowledge Claude already has and could be trimmed — anchor 4 ('minor instances of over-explanation that could be trimmed') fits better than 5.

Actionability

Every example is fully executable, copy-paste-ready with concrete flags ('--strategy iron-condor --expiry 2026-01-16 --put-short 175 --put-long 170 --call-short 185 --call-long 190'), and the uv fallback note ('replace uv run python with python') plus the documented JSON output fields ('cost', 'max_profit', 'max_loss', 'breakeven', 'probability') cover the common cases. Not 4 because there are no gaps in the documented strategies — the four documented invocations match the frontmatter's claimed scope.

Workflow Clarity

This is a simple, single-action skill and the action is unambiguous: run one CLI command, read the JSON fields listed under '## Output', then 'Explain the risk/reward and when this strategy is appropriate'. The uv/python fallback note is an explicit recovery path for an environment failure. Per the rubric's simple-skill exception this scores 5; no destructive/batch cap applies.

Progressive Disclosure

The skill is under 50 lines with well-organized sections (Instructions, Strategies and Options, Output, Dependencies, Timezone) and a single one-level-deep bundle reference, scripts/spreads.py, which exists in the bundle. No buried or nested references, and nothing that belongs in a separate file is inlined — matching the rubric's small-skill guidance for a 5.

Specificity

'Analyze option spread strategies like vertical spreads, iron condors, straddles, strangles' names the domain and enumerates four concrete strategy types rather than vague filler. It sits between anchor 3 (1-2 concrete actions) and anchor 4 (several specific actions) because everything hangs off the single verb 'Analyze' — the enumeration of subjects is specific, but the action coverage is one-dimensional. Not 5 because it doesn't convey distinct analysis capabilities (e.g., payoff, breakeven, probability of profit).

Completeness

The 'what' is explicit ('Analyze option spread strategies like vertical spreads, iron condors, straddles, strangles') and the 'when' is explicit with concrete trigger phrases ('Use when user asks about spreads, multi-leg strategies, ... or strategy analysis'), in third person throughout. This directly matches the anchor-5 pattern; not 4 because the when-clause is not merely present but enumerates specific triggers.

Trigger Term Quality

'Use when user asks about spreads, multi-leg strategies, vertical spread, iron condor, straddle, strangle, or strategy analysis' includes the natural phrases an options trader would actually say. Anchor 4 ('good keyword coverage; a few natural terms missing') fits: common variations like 'options strategy', 'call/put spread', 'credit/debit spread', or 'risk/reward analysis' are absent. Not 5 because coverage stops short of the synonym breadth of the anchor-5 example.

Distinctiveness Conflict Risk

The niche is clear — 'vertical spread, iron condor, straddle, strangle' are distinctive, unlikely to fire for unrelated skills. The trailing trigger 'or strategy analysis' is generic and could overlap with sibling trading skills (the bundle declares a trading-skills dependency and the script supports more strategies), matching anchor 4 ('mostly distinct; minor overlap risk with closely related skills'). Not 5 because of that broad catch-all trigger; not 3 because the named strategies anchor it firmly in a specific niche.