Conciseness

The body is lean (~30 lines), well-sectioned, and does not explain concepts Claude already knows (e.g., what a thermometer is); the only mild redundancy is the Example Invocation Thought restating the comparison, but every section earns its place, matching the 'lean and efficient; assumes Claude's competence' anchor 5.

Actionability

Provides concrete elements — a parameter list, an example invocation thought, and an Action Template 'move <target_object> in inventory to <green/blue> box' — but the Decision Logic section is internally contradictory: it assigns the green box for BOTH 'measurement_result > threshold' and 'measurement_result < threshold', directly conflicting with the description and example, so a key detail is wrong and the guidance cannot be reliably executed, fitting anchor 3 ('concrete guidance but incomplete; missing key details') rather than anchor 4.

Workflow Clarity

The Prerequisites -> Decision Logic -> Execution sequence is present and clearly ordered, but the decision step is ambiguous because both branches resolve to the green box, so the single action is not unambiguous (blocking the simple-skill exception to 5); the sequence has a content error rather than a clean validation gap, placing it at anchor 3 rather than anchor 4.

Progressive Disclosure

The body is well-organized under clear sections (Purpose, Core Workflow, Required Parameters, Example, Action Template) and is short enough to stand alone, but the provided references/action_primer.md — which lists the exact 'move <OBJ> to <OBJ>' action plus prerequisite primitives (pick up, teleport) the workflow depends on — is never linked from the body, a minor organization gap matching anchor 4 rather than the fully-signaled anchor 5.

Specificity

Lists several concrete actions — 'Moves an object to one of two destination containers', 'numeric threshold check', 'Place object in green box if value > threshold, or blue box if value < threshold' — but they are variations of a single conditional-placement task rather than multiple distinct actions, matching the 'several specific actions; minor gaps' anchor and falling short of the comprehensive multi-action anchor 5.

Completeness

Clearly answers 'what' (conditional placement based on a threshold check) and explicitly answers 'when' via the concrete trigger phrase 'Trigger after a measurement (e.g., temperature) is taken', which is equivalent to a 'Use when...' clause, satisfying the anchor 5 requirement for both what and when with concrete triggers.

Trigger Term Quality

Includes natural domain terms 'measurement (e.g., temperature)', 'threshold', and 'box' with a synonym example provided, giving good keyword coverage though a few natural variations (e.g., 'reading', 'value') are absent — fits anchor 4 rather than the comprehensive synonym coverage of anchor 5.

Distinctiveness Conflict Risk

Targets a narrow, well-defined niche — conditional object placement into green vs. blue boxes based on a numeric threshold — with distinct triggers and minimal realistic overlap with other skills, matching the 'clear niche with distinct triggers; minimal conflict risk' anchor.