Conciseness

The body is dense with non-obvious, skill-specific facts (the `current.json` schema, 0-based `pageIndex` vs 1-based `pageNumber`, selection line/column semantics, staleness tiers) and assumes Claude's competence throughout. However, the re-read-freshly imperative is repeated across the intro, the dedicated 'Re-read on every deictic turn' section, and again inside 'Staleness', so a few sentences could be trimmed — matching 'efficient; minor instances of over-explanation that could be trimmed' rather than the lean-every-token-earns-its-place anchor.

Actionability

Everything is executable: the exact path `node_modules/.open-slide/current.json`, a full annotated JSON payload, field-by-field usage instructions, concrete staleness thresholds (~5 minutes), fallback prompts to ask the user verbatim, and two copy-paste-ready numbered workflows including the preview URL `s/<slideId>/preview?p=<pageNumber>`. This matches the fully-executable anchor with common cases covered.

Workflow Clarity

Both example workflows are clearly sequenced with explicit validation checkpoints — 'Check `updatedAt` is recent', confirming the element via `selection.text` and `tagName` — plus error-recovery branches (stale → confirm with user; missing file → ask; `selection` null → page-level fallback). This matches the top anchor for clear sequence with explicit validation and feedback paths; the skill involves no destructive or batch operations that would require additional loops.

Progressive Disclosure

The skill has no bundle files, and nothing in the body warrants splitting — every section is core to the single task. Content is well-organized under clear headers with a clean overview-to-detail flow, and the two outward references (the `slide-authoring` skill and its preview section) are well-signaled and exactly one level deep, so there is no burying or nesting. This matches the well-organized, easy-navigation anchor.

Specificity

The description enumerates exactly what the skill resolves — "which slide, page, and (optionally) selected element the user is currently viewing in the open-slide dev server" — plus the concrete mechanism ("Re-read `node_modules/.open-slide/current.json` at the start of every such turn") and the staleness rationale. This is comprehensive, fully concrete coverage of a single-purpose skill with no generic filler, matching the anchor for multiple specific concrete actions with comprehensive coverage rather than leaving minor gaps.

Completeness

The 'what' is explicit (resolve the currently viewed slide/page/selection in the open-slide dev server) and the 'when' is explicit with concrete trigger phrases ("Consult this whenever the user references..."). Both are clearly stated, matching the top anchor; it is not score 4 because the 'when' clause is already fully explicit and specific rather than merely present.

Trigger Term Quality

It quotes the exact natural phrases a user would say — "this page", "this slide", "this element", "the slide I'm on", "the current page" — and adds the catch-all "any deictic reference to slide content without naming it", which covers remaining synonyms. This matches the comprehensive natural-terms anchor; there are no technical-jargon-only or generic keywords.

Distinctiveness Conflict Risk

The niche is narrowly defined — reading the dev server's current-position file for slide work — and the triggers are scoped to deictic references to slide content. No other plausible skill would claim these triggers (the body even carves out the `apply-comments` and explicit-slide-name cases), so conflict risk is minimal, matching the clear-niche anchor.