Conciseness

The body is lean — a compact error table, one-line commands, brief output examples — and assumes Claude's competence without explaining crypto or API concepts. It falls short of 5 only through duplication: the Examples section re-runs the exact "--symbol BTC" and "--watchlist top10" commands already shown in Instructions (only the output preview is new), and the Contents anchor line adds little. Efficient with minor trimming opportunities — anchor 4.

Actionability

Every instruction is a copy-paste-ready command with real flags and the ${CLAUDE_SKILL_DIR} path variable ("python ${CLAUDE_SKILL_DIR}/scripts/price_tracker.py --symbols BTC,ETH,SOL", "--period 90d --output csv"), prerequisites give the exact pip install, and examples show expected output lines. This matches the fully-executable, common-cases-covered anchor 5; it is clearly above anchor 4's 'minor gaps'.

Workflow Clarity

This is a simple single-purpose skill and the flow is unambiguous: install deps → optionally set API key → run one command with the needed flags. Recovery guidance is explicit: the error table maps each failure ("Unknown symbol", "Rate limit exceeded", "Network error") to a cause and solution ("use --list to search", "Wait 60s, or add API key"), and rate-limit strategy is stated (cache first, backoff, yfinance fallback). Per the simple-skill guidance, this earns 5; it is not a destructive/batch operation so no validation cap applies.

Progressive Disclosure

SKILL.md is a clean overview that appropriately defers detail to a clearly signaled, one-level-deep reference ([references/implementation.md] linked three times for config, output formats, and the file map), matching anchor 4. Not 5 because the bundle's references/errors.md and references/examples.md exist but are never linked from SKILL.md — the Error Handling table and Examples section in-line content whose fuller versions live in orphaned files a reader cannot discover. Not 3 because the main structure and the one referenced file are well organized and clearly signaled.

Specificity

Concrete actions are named — "Track real-time cryptocurrency prices across exchanges with historical data and alerts" plus "fetching historical price data" — but coverage has minor gaps: watchlists, output formats, and currency options go unmentioned, and "alerts" claims a capability the skill body does not document (an over-claim). This matches anchor 4 ('several specific actions; minor gaps') rather than 5's comprehensive coverage.

Completeness

Both questions are explicitly answered: what ("Track real-time cryptocurrency prices across exchanges with historical data and alerts") and when ("Use when checking crypto prices..." plus a concrete trigger-phrase list), matching the score-5 anchor exactly. Not 4 because the 'when' clause needs no additional specificity — concrete trigger phrases are already supplied.

Trigger Term Quality

Eight natural trigger phrases ("check price", "BTC price", "what's ETH trading at", "show me top coins", "track my watchlist") plus the explicit "Use when checking crypto prices, monitoring markets, or fetching historical price data" cover the full range of phrasings a user would naturally say. Not 4 because synonyms across coin names, market watching, and quote phrasings are all present, matching the comprehensive anchor.

Distinctiveness Conflict Risk

The crypto niche is clear and crypto-specific triggers ("crypto prices", "what's ETH trading at") are distinct, but generic triggers like "check price" and "get quote for" could also fire for stock-quote or general market-data skills, and the "Provides price data infrastructure for dependent skills (portfolio, tax, DeFi, arbitrage)" line invites overlap with those sibling skills. Mostly distinct with minor overlap risk — anchor 4, not 5.