Conciseness

The body is two sentences that assume Claude's competence and explain no background concepts, routing directly to the workflow file — every token earns its place. Not level 2 because there is no unnecessary explanation or padding to tighten.

Actionability

It gives a concrete, copy-paste-ready instruction ("use the `view_file` tool to read ... `.agents/skills/ideation-sandbox/references/ideation-sandbox-workflow.md`") plus a fallback when the payload is already in context, and the referenced workflow file supplies the concrete, executable guidance (specific tools like `create_discussion`, `manage_discussion`, `get_discussion_conversation`). Not level 2 because the routing instruction is specific and complete rather than vague or pseudocode.

Workflow Clarity

The referenced workflow is clearly sequenced (§1 Context → §2 Initial Proposal / Gate 0 → §3–§4 review → §5 graduation criteria → §6 graduation trigger) with explicit validation gates ("Graduation is blocked ...", fold markers, STEP_BACK blockers), an 8-point cross-substrate sweep checklist, and feedback loops (DEFERRED reconciliation, re-poll obligations). Not level 2 because checkpoints and error-recovery loops are explicit, not implicit.

Progressive Disclosure

The body is a lightweight router pointing one level deep to a single, real reference file (verified present), with content appropriately split between a terse SKILL.md and the detailed workflow — matching the level-3 anchor. The reference's cross-links to audits/* are supplementary rationale rather than a nested instruction chain, so the bad 2+-level nesting pattern does not apply.

Specificity

It names a domain and actions ("propose architectural features, unknown unknowns, and brainstorm ideas natively in GitHub Discussions") but the verbs are high-level/exploratory rather than the multiple concrete operations the level-3 anchor calls for (cf. "extract, fill, merge"). Not level 1 because real actions and a concrete substrate (GitHub Discussions) are stated; not level 3 because the actions are abstract, not concrete operations.

Completeness

It explicitly states what the skill does and includes an explicit "Triggers: Use this skill when ..." clause covering multiple trigger conditions, satisfying both the 'what' and 'when' requirements of the level-3 anchor. Not capped at 2 because an explicit 'Use when' clause is present.

Trigger Term Quality

Natural phrases a user might say appear ("brainstorm an architecture change", "highly exploratory / undefined technical idea"), but they are diluted by heavy internal jargon ("§5.2 Step 2.5 Architectural Step-Back", "high-blast-radius proposals", "[RESOLVED_TO_AC] / [GRADUATED_TO_TICKET] graduation", "auto-fire trigger") a user would never say. Not level 1 because some natural trigger terms exist; not level 3 because the jargon crowds out clean coverage of common user phrasings.

Distinctiveness Conflict Risk

The niche is clear — architectural ideation routed to GitHub Discussions with a graduation protocol — and the triggers are scoped enough to avoid firing for unrelated skills. Not level 2 because the architectural + Discussions + graduation framing distinguishes it from generic ideation helpers; the slight genericness of 'brainstorm ideas' is contained by the surrounding architectural context.