Conciseness

The body is almost entirely terse directives ("keep it compressed", "avoid hashtags and generic filler", "do not write fake hyper-casual creator copy") with zero explanation of concepts Claude already knows and no padded sections. The only near-redundancy — rule 5 vs. the Banned Patterns list, and the LinkedIn bullet vs. the banned "What do you think?" — is deliberate reinforcement of the skill's one core rule, so every token still earns its place (anchor 5).

Actionability

For an instruction-only skill the guidance is highly actionable: concrete per-platform constraint lists, a literal banned-phrase list to delete and rewrite, a defined output format, and a quality-gate checklist. It stops short of anchor 5 because there is no worked example (e.g. one source post adapted for X and LinkedIn) that would make the adaptation pattern copy-paste concrete — a minor gap consistent with anchor 4.

Workflow Clarity

A clear three-step sequence (primary version → voice fingerprint → adapt by platform) plus posting order, output format, and a pre-delivery Quality Gate checklist ("no copy is duplicated verbatim across platforms") gives explicit validation. It falls at anchor 4 rather than 5 because the gate lacks an explicit fix-and-recheck feedback loop — nothing says what to do when a quality-gate check fails beyond the implied rewrite.

Progressive Disclosure

No bundle files exist (no references/, scripts/, or assets/), and the ~110-line body is well sectioned with the Related Skills section clearly signaling cross-skill dependencies (brand-voice, content-engine, x-api). Structure is good and nothing is mis-filed, but all platform constraint lists are inlined in SKILL.md with no one-level-deep reference files, which is appropriate at this size yet leaves minor organization headroom — anchor 4.

Specificity

Names the domain with four concrete platforms ("across X, LinkedIn, Threads, and Bluesky") and lists several specific actions — "Adapts content per platform", "Never posts identical content cross-platform" — but coverage has minor gaps (no mention of generating variants, sequencing, or publishing mechanics), matching the anchor-4 example's profile rather than the comprehensive anchor 5.

Completeness

Both parts are present: the 'what' is explicit ("Multi-platform content distribution... Adapts content per platform") and the 'when' is an explicit "Use when the user wants to distribute content across social platforms" clause. The 'when' is a single generic trigger phrase rather than multiple concrete trigger phrasings as in the anchor-5 example, so it sits at anchor 4 ('when' could be more explicit or specific).

Trigger Term Quality

Good natural-term coverage: "cross-platform", "multi-platform", "distribute content", "social platforms", and all four platform names. A few common user phrasings are missing ("crosspost", "post this everywhere", "share"), which places it at anchor 4 rather than the comprehensive synonym coverage of anchor 5, and clearly above anchor 3's partial coverage.

Distinctiveness Conflict Risk

Crossposting to four named platforms is a clear niche with distinct triggers, but the phrase "Adapts content per platform using content-engine patterns" explicitly names a closely related skill, creating minor overlap risk with content-engine/brand-voice — the anchor-4 profile ('mostly distinct; minor overlap risk with closely related skills'). It is well above anchor 3's generic overlap and just short of anchor 5's minimal-conflict profile.