Conciseness

The body is mostly efficient — stance bullets, concrete commands, and example dialogues all earn their place — but it has noticeable tightening opportunities: the '--store' stickiness rule is restated nearly verbatim in the Store-selection paragraph and again inside steps 2, 3, and 4 of the capture workflow, and the 'What You Don't Have To Do' and 'Guardrails' sections repeat points already made by 'This is a stance, not a workflow' and 'Don't auto-capture'. This fits anchor 3 (mostly efficient but could be tightened) rather than anchor 2, since the padding is redundancy in otherwise valuable guidance, not explanation of concepts Claude already knows.

Actionability

Concrete, executable commands appear throughout: `openspec list --json`, `openspec new change "<name>"`, `openspec status --change "<name>" --json`, `openspec instructions "<artifact-id>" --change "<name>" --json`, plus a specific decision table mapping insight types to capture locations. This matches anchor 4 (mostly executable guidance with minor gaps); it does not reach anchor 5 because several directives remain necessarily abstract ('Follow the returned template and instruction fields', 'Use root.path returned above') without worked examples of the JSON fields in play, and it is above anchor 3 because the guidance that can be concrete is given as exact commands rather than pseudocode.

Workflow Clarity

The capture workflow is a clearly numbered 1-4 sequence with an explicit validation feedback loop in step 4 ('After creating each artifact, re-run `openspec status --change "<name>" --json` ... and continue until every requested artifact is done, skipped, or was deliberately skipped'), and error-recovery paths (blocked prerequisites, conditional skips) are enumerated. This fits anchor 4 (clear sequence with most checkpoints present). It falls short of anchor 5 because steps 2-4 are dense run-on paragraphs with nested conditionals that are hard to follow as a checklist, and the 'when a change exists' branch has checkpoints ('re-run status') only implied rather than stated.

Progressive Disclosure

There are no bundle files, so everything lives in SKILL.md (~290 lines), but the single file is well organized into clear, well-signaled sections (The Stance, What You Might Do, OpenSpec Awareness, Handling Different Entry Points, Ending Discovery, Guardrails) that are easy to navigate. This matches anchor 4 (good structure; most content appropriately placed). It does not reach anchor 5 because the ~100 lines of example dialogues in 'Handling Different Entry Points' are content that could plausibly live in a references file, and it is above anchor 3 because nothing that clearly belongs in a separate file (like an API reference) is inlined and no nested or buried references exist.

Specificity

The description lists actions — 'a thinking partner for exploring ideas, investigating problems, and clarifying requirements' — but these are abstract role descriptions rather than concrete capabilities (no mention of e.g. reading the codebase, mapping architecture, or creating change proposals). It matches anchor 3 (names domain and 1-2 concrete actions, but not comprehensive); it is below anchor 4 because the actions named are not specific, executable operations, and above anchor 2 because it does enumerate several distinct facets of the domain rather than a bare domain label.

Completeness

Both questions are answered explicitly: the what ('a thinking partner for exploring ideas, investigating problems, and clarifying requirements') and the when ('Use when the user wants to think through something before or during a change'), with 'think through something before or during a change' serving as a concrete trigger phrase. This matches anchor 5; anchor 4 would apply only if the 'when' were implicit or less explicit, which it is not.

Trigger Term Quality

Natural phrases a user would say are present: 'think through something', 'exploring ideas', 'investigating problems', 'clarifying requirements'. It sits at anchor 4 (good keyword coverage; a few natural terms missing) rather than 5 because common synonyms like 'brainstorm', 'talk through', 'discuss', or 'spike' are absent, and it is above anchor 3 because the phrases included are ones users naturally say, not just domain jargon.

Distinctiveness Conflict Risk

The niche ('Enter explore mode', 'thinking partner', 'before or during a change') is distinct and unlikely to fire for unrelated skills, matching anchor 4 (mostly distinct; minor overlap risk). It falls short of anchor 5 because 'exploring ideas' and 'investigating problems' are broad phrases that could overlap with general brainstorming or research skills, but it is clearly above anchor 3 since the explore-mode framing and change-lifecycle timing are specific to this skill's ecosystem.