Conciseness

The prose is dense and high-signal — rules like "A report with twenty findings has failed" and "No paragraph runs past two sentences" instruct without padding, and nothing explains concepts Claude already knows. It falls short of anchor 5 due to minor repetition (title rules restated across sections; the in-page-anchor exception to target="_blank" appears in both HTML constraints and the primitives) and long stretches of inline CSS.

Actionability

Fully executable throughout: exact tool calls with parameters (`list_reports`, `save_report` with `reportId`, `set_report_sharing` with `public: true`), exact title formats ("MMM D, YYYY"), byte limits ("aim under 80 KB", "hard cap is 500,000 bytes"), expected error strings ("stopped early"), and a complete copy-paste starter template covering the common case.

Workflow Clarity

Numbered pre-checks ("Before you write" 1-3: dedupe via list_reports, title uniqueness, when to fetch HTML), explicit post-save steps, and genuine feedback loops ("If the save fails, the error names the limit and the value. Fix that one thing and save again"; truncated HTML → do not overwrite). Not anchor 5: the end-to-end sequence must be synthesized across six separate sections rather than given as one master flow, and validation is largely delegated to the viewer/server rather than performed by the agent.

Progressive Disclosure

The bundle contains only SKILL.md — no references/, scripts/, or assets/ — and the ~155-line starter template with its CSS plus the primitives catalog are all inlined. Section headers are clear, but content that would naturally live one level deep (e.g., a template.html or primitives reference) is inline in the main file, matching the anchor 'content that should be separate is inline' despite good structure.

Specificity

"Write and save an OpenSEO report as one self-contained HTML page" names the domain and two concrete actions (write, save), but coverage is not comprehensive — revising existing reports, applying templates, and public sharing go unmentioned. This matches the anchor 'Names domain and 1-2 concrete actions, but not comprehensive' rather than anchor 4, which expects several specific actions listed.

Completeness

It explicitly answers both questions: the "what" is "Write and save an OpenSEO report as one self-contained HTML page" and the "when" is a concrete 'Use when' clause with specific trigger phrases ("a skill has finished its research", "asks for a report, check-in, or summary", "names a report template"). This mirrors the anchor-5 example pattern.

Trigger Term Quality

Natural phrases a user would say are present: "asks for a report, check-in, or summary, or names a report template". A few natural variations are missing (e.g., "write-up", "findings", "deliverable"), so it falls short of the comprehensive synonym coverage of anchor 5.

Distinctiveness Conflict Risk

"OpenSEO report" and "report template" carve a clear niche with mostly distinct triggers. The bare words "summary" and "check-in", however, could also match generic summarization skills, which is more than the minimal conflict risk of anchor 5 — so it sits at 'mostly distinct; minor overlap risk'.