Conciseness

The ~48-line body is lean and efficient: every section (Usage, Data, Valid Statuses) adds information Claude would not know — the CLI commands, storage path, contact_id hashing scheme, and valid status values — with no explanation of known concepts. It does not drop to 4 because the only arguable redundancy (the opening line restating the description) is conventional skill structure rather than over-explanation.

Actionability

Every usage example is a fully executable, copy-paste-ready command with realistic arguments covering all common cases: check, single add, bulk CSV import, update, export (multiple flag variations), and stats. The Data section also gives the concrete storage path and dedup/hash rule, matching the 'fully executable; specific examples cover the common cases' anchor. The only nit — the expected CSV column format for bulk import is not stated — is minor enough to keep this at 5 given the script's flexible column mapping.

Workflow Clarity

The check command ('Check if contacts are already cached') is listed first, providing a verification step for the dedup-critical operation, and the automatic contact_id hashing described under Data acts as built-in validation; this matches 'clear sequence with most checkpoints present; minor validation gaps'. It is not 5 because no explicit check-before-add sequence or error-recovery guidance is given, and the bulk CSV import (a batch operation) documents no expected column format or failure handling.

Progressive Disclosure

Per the rubric's simple-skill guidance ('under 50 lines with no need for external references can score 5 with just well-organized sections'), this body qualifies: it is well under 50 lines, organized into clear Usage/Data/Valid Statuses sections, and references only the bundled script (scripts/cache.py exists in the bundle) plus an auto-created data file. There is no content that belongs in a separate reference file.

Specificity

The description lists several concrete capabilities — 'Track all identified/contacted people across strategies', 'CSV-backed contact database with dedup by LinkedIn URL or email', 'Prevents duplicate outreach' — which matches the 'several specific actions; minor gaps in coverage' anchor. It falls short of 5 because coverage is incomplete (no mention of adding, updating, exporting, or checking contacts), and is above 3 because more than 1-2 concrete actions are named with a concrete dedup mechanism.

Completeness

The 'what' is clear (CSV-backed contact database with dedup by LinkedIn URL or email), but there is no 'Use when...' clause or equivalent explicit trigger guidance; 'Prevents duplicate outreach when running strategies on a recurring cadence' describes purpose rather than when Claude should invoke the skill, so completeness is capped at 3 per the judging guidelines. It is not a 2 because the 'what' half is concrete and specific.

Trigger Term Quality

Relevant keywords like 'contact database', 'dedup', 'LinkedIn URL', 'email', and 'duplicate outreach' are present, but common variations a user would naturally say — 'leads', 'prospects', 'CRM', 'outreach tracker' — are missing, matching the 'some relevant keywords but missing common variations or synonyms' anchor. It does not reach 4 because the synonym coverage is thin for the lead-generation domain.

Distinctiveness Conflict Risk

The niche — deduplicating contacted people by LinkedIn URL or email to prevent repeat outreach — is fairly distinct with concrete differentiators, matching 'mostly distinct; minor overlap risk with closely related skills'. It is not a 5 because terms like 'track people' and 'contact database' could overlap with general CRM/lead-tracking skills.