Conciseness

Every section is commands, syntax rules, or one-line prerequisites ("Requires Obsidian to be open."); there is no explanation of what Obsidian or a vault is, and no padding. The body assumes Claude's competence, matching anchor 5 ('lean and efficient; every token earns its place') rather than 4's 'minor instances of over-explanation'.

Actionability

All guidance is copy-paste-ready: concrete parameterized commands ("obsidian create name=\"My Note\" content=\"Hello world\""), a ten-command Common patterns block covering the main use cases, and executable developer commands (dev:errors, dev:screenshot, dev:dom, eval). This matches anchor 5 ('fully executable; specific examples cover the common cases').

Workflow Clarity

The plugin develop/test cycle is a numbered four-step sequence with explicit validation checkpoints and a feedback loop ("Check for errors — if errors appear, fix and repeat from step 1"), plus visual and console verification steps. This matches anchor 5 ('clear sequence with explicit validation steps; feedback loops for error recovery'); no destructive or batch workflow lacks validation.

Progressive Disclosure

The single file is well-organized with clear sections, and it defers the full command reference to the authoritative source ("Run `obsidian help` ... This is always up to date") instead of inlining it — good structure with appropriately placed content. It scores 4 rather than 5 because at ~107 lines it exceeds the under-50-line simple-skill exception, and the command reference and plugin-development sections could be split into separate files if the skill grows.

Specificity

The description lists several concrete actions ("read, create, search, and manage vault content", "develop and debug Obsidian plugins and themes"), but "manage vault content" is a generic catch-all rather than enumerated capabilities, leaving minor coverage gaps (e.g., append, daily notes, properties). This matches anchor 4 ('lists several specific actions; minor gaps in coverage') rather than 5, and exceeds anchor 3's '1-2 concrete actions'.

Completeness

The "what" is clear and multi-action, but there is no "Use when..." clause or equivalent explicit trigger guidance — the purpose infinitives ("or to develop and debug ... from the command line") only weakly imply when to use the skill. Per the judging guideline, a missing 'Use when...' clause caps completeness at 3; the score is not 4 because the "when" is implied rather than explicit.

Trigger Term Quality

"Obsidian CLI", "vault content", "plugins and themes", and "command line" are natural terms a user would say, giving good keyword coverage. A few natural variations are missing — users commonly say "notes", "markdown", or "daily notes" when asking for vault interaction, which keeps this at anchor 4 rather than 5.

Distinctiveness Conflict Risk

"Obsidian CLI" carves out a clear niche with distinct triggers (vault content management plus plugin/theme development via a specific CLI); there is minimal risk of this firing for the wrong skill. It matches anchor 5 and is more distinct than anchor 4's 'minor overlap risk with closely related skills'.