Conciseness

The body is dense and operative: every section gives rules or exact syntax rather than background, and it never explains concepts Claude already knows. It is held below anchor 5 by inline time-sensitive provenance ("(team feedback, 2026-07-16)", "(correctness, verified 2026-07-14)"), which the guidelines say to penalize unless placed in a deprecated/old-patterns section, and by a few near-duplicated rules (the em-dash/tag limits appear in both Style and Common Mistakes). It is well above the midpoint: no padding, no conceptual filler.

Actionability

Guidance is highly concrete: exact output path ("<source-stem>-summary.md"), line budgets ("TLDR — 3 to 5 lines"), a fixed 13-section structure in order, a copy-ready command ("PLANNOTATOR_REMOTE=1 PLANNOTATOR_PORT=<port> plannotator annotate <summary-path>"), and an explicit do/never formatting table. Minor gaps keep it at 4: it invokes external tools (render-diagram, textstyle.py --smallcaps, plannotator) whose usage lives outside this skill and no bundle files are shipped to back them, and 'render one all-in-one diagram' stops short of what diagram content to include.

Workflow Clarity

The command workflow is a clear 6-step numbered sequence with an explicit validation checkpoint (step 5 self-check listing the exact failure conditions: no <u>, no em-dashes, no image title attr, no GFM alert inside details, no scattered ticket numbers) and a feedback loop (step 6: apply returned annotations and repeat). Content rules are additionally reinforced by a Common Mistakes table with fixes. This matches the explicit-validation-with-error-recovery anchor.

Progressive Disclosure

The single file is well-sectioned (When to Use, command steps, contents, style, renderer-safe table, Common Mistakes) and needs no external references to execute, so nothing is buried or nested. It sits at 4 rather than 5 because the ~80-line body inlines shared conventions that the text itself says are common to two skills ("Both this skill and readable-doc-spike follow it" for the renderer-safe table), i.e., content that naturally belongs in a shared reference file; and several referenced tools (textstyle.py, render-diagram) have no bundled paths to point to.

Specificity

The description lists multiple concrete actions with comprehensive coverage: "Condenses the source into a super-short TLDR, one all-in-one diagram, the recommendation, spike goals, still-open options, open questions, open risks, the technical deltas (GraphQL / DB / query), additive migration, external dependencies, and feature-flag strategy, with a link back to the full doc." This is a full enumeration of the deliverable's contents, matching the comprehensive multi-action anchor; it is not merely naming a domain with 1-2 actions.

Completeness

Both questions are answered explicitly: what it does ("Condenses the source into a super-short TLDR...") and when to use it ("Use when you have a full spike, PRD, or long design doc and want a tight, scannable SUMMARY of it for a busy reviewer"). It uses third person ("Condenses"), includes a concrete 'Use when' trigger clause, and adds scope boundaries. This matches the anchor 5 example structure exactly; score 4 would require the 'when' to be less explicit, which it is not.

Trigger Term Quality

Good natural keyword coverage: "spike", "PRD", "design doc", "SUMMARY", "TLDR", "tight, scannable", "busy reviewer" are phrasings a user would plausibly say. A few common variations are missing ("short version", "digest", "executive summary", "brief"), which keeps it just below the comprehensive-with-synonyms anchor 5, but it is clearly above the midpoint: it explicitly disambiguates the sibling skills, which is what the conflict anchor rewards, so anchor 5's minimal-conflict fit is arguably close; the missing natural variations on the summary ask keep it at 4.

Distinctiveness Conflict Risk

It carves out a clear niche (small reviewer-facing summary layer) and explicitly routes adjacent intents elsewhere: "For the full spike itself use readable-doc-spike; for the content use write-spike." Triggers are tied to a specific scenario (digest of a finished spike/PRD for a reviewer), so wrong-skill firing risk is minimal.