The body is lean: a brief coverage list, tight MUST/MUST NOT constraints, short 'When to use' triggers, and a five-step workflow with no padding or re-explanation of concepts Claude already knows. Not a 2 because nothing is superfluous.

The MUST constraints and numbered workflow give concrete, copy-paste-ready direction ('Strip out wording that already assumes a fix', 'describe the current state as observable facts', 'flag any field left open pending a clarifying answer')—explicit instruction rather than vague description.

A clear five-step sequence leads from reading the reference through separating problem from solution to reporting the frame, with an explicit checkpoint in step 5 to 'flag any field left open pending a clarifying answer'. For this instruction-only skill the single action is unambiguous and validation/flagging is present.

SKILL.md is a concise overview with one well-signaled, single-level reference ([references/021-problem-framing.md]) that exists in the bundle; detailed guidance is correctly deferred to it rather than inlined.

Lists multiple concrete actions—'establishing the Problem statement, Current state, Desired state, Stakeholders, and Success criteria'—naming the exact outputs the skill produces rather than vague abstractions.

Clearly answers both what (establishes the five named framing fields) and when ('Use when a problem or issue needs explicit framing before deeper analysis begins', plus the maintainer-directly-asks trigger).

Uses natural phrasing a user would actually say ('frame a problem', 'before root-cause analysis', 'design, or planning begins') alongside explicit 'Use when...' and 'This should trigger when...' triggers with broad coverage.

The narrow 'Problem Framing' niche and trigger tied to upstream analysis (root-cause, design, planning) make it unlikely to fire for unrelated skills; the 'Part of Plinth Toolkit' tag further scopes it to its toolkit.