Conciseness

The body is efficient with no padding or explanations of concepts Claude already knows, but contains minor duplication that could be trimmed: the validate/register commands appear both in step 6 and again in the Signal Mode quick-commands table, and the Expert Structure Requirements section partially restates the step-2 directory tree. This sits above anchor 3 (which would require some unnecessary explanation) but below anchor 5's every-token-earns-its-place.

Actionability

Fully executable guidance throughout: a copy-paste example prompt, a concrete directory structure template, a SKILL.md frontmatter template, a domain-type-to-signal-approach mapping table, and runnable commands such as "scripts/validate_expert.sh /path/to/expert-{name}" and "scripts/register_expert.sh /path/to/expert-{name}". Specific examples cover the common creation case end-to-end, matching anchor 5.

Workflow Clarity

The 7-step creation process is clearly sequenced with an explicit validation checkpoint (step 6: run validation, "If valid, register") and an Expert Structure Requirements checklist. However, the failure path is not explicitly handled — there is no instruction for what to do when validation fails (fix and re-validate), which anchor 5 requires as feedback loops for error recovery.

Progressive Disclosure

The body is a clear overview with well-signaled, one-level-deep references: all pointers (references/expert-structure.md, references/catalog-formats.md, references/signal-patterns.md) resolve to real bundle files, and detail such as catalog entry formats, structure patterns, and signal script patterns is appropriately split into those files. Navigation is easy with no nesting or buried references, matching anchor 5.

Specificity

The description lists multiple specific concrete actions — "Automatically synthesizes references, generates signal scripts, validates, and registers in experts.md/signals.md catalogs" — along with the required input format and workflow mode, giving comprehensive coverage of the skill's behavior. It exceeds anchor 4 because the action list covers the full pipeline rather than leaving minor gaps.

Completeness

The "what" is explicit ("creating new SDD experts from domain documentation... synthesizes references, generates signal scripts, validates, and registers") and the "when" is explicit via "Triggers - create expert, new expert, make expert, expert for, domain expert, add expert", which is equivalent explicit trigger guidance, so the missing-'Use when' cap at 3 does not apply. Both questions are answered with concrete trigger phrases, matching anchor 5.

Trigger Term Quality

Trigger list "create expert, new expert, make expert, expert for, domain expert, add expert" provides good natural verb+noun coverage users would actually say. A few natural variations are missing (e.g., "build expert", "generate expert", "SDD expert", "expert from docs"), so it falls short of anchor 5's comprehensive synonym coverage but sits above anchor 3's missing common variations.

Distinctiveness Conflict Risk

The meta-creation niche (creating other SDD experts from domain docs) is clearly distinct from ordinary domain skills. Short generic phrases like "expert for" carry minor overlap risk with general requests mentioning experts, keeping it below anchor 5's minimal-conflict bar, but the risk is limited, so it is above anchor 3.