Conciseness

The body is extremely dense with no padding and no explanation of concepts Claude already knows, but a few rules are restated ("never `rigor` or `qa.level`" appears in Phase 1 and Phase 7; Run result formatting is specified twice), matching anchor 4's 'efficient with minor instances that could be trimmed' rather than the every-token-earns-its-place anchor 5.

Actionability

Guidance is fully executable throughout: exact bash commands (e.g. `md-section.sh set-field <story> Status "In Progress"`), the godot parse-check invocation with exit-code semantics, verbatim stop messages, and copy-ready output templates, matching anchor 5.

Workflow Clarity

Seven named phases are sequenced with a copy-and-tick checklist, gating stops in Phase 2, explicit validation in Phase 6 (artifact existence, parse check, run-and-observe with OBSERVED/NOT VERIFIED/N/A outcomes), and feedback loops (resume the agent; specialist findings go back to the programmer once), matching anchor 5.

Progressive Disclosure

The two reference files (engine-checks.md, version-mismatch.md) exist, are one level deep, clearly signaled, and conditionally loaded ("Read only when the engine is Unity or Unreal"), but the ~300-line body keeps substantial detail inline (Godot executable-resolution rules, full Phase 7 closing templates) rather than acting as an overview, fitting anchor 4 more than the well-split anchor 5.

Specificity

"Implements one story in code with tests, following its ADRs" names the domain plus three concrete actions (implement in code, write tests, follow ADRs), matching anchor 4. Anchor 5 is not reached because the broader workflow (QA evidence, checkpointing) is unmentioned, and anchor 3 undercounts the actions listed.

Completeness

It explicitly answers both what ("Implements one story in code with tests, following its ADRs") and when ("Use when the user says to build, implement or start working on a story") with concrete trigger phrases, matching anchor 5; anchor 4's caveat about a less-explicit 'when' does not apply.

Trigger Term Quality

"Use when the user says to build, implement or start working on a story" covers natural phrasings with variations, but a few obvious synonyms (e.g. "code this story", "work on a story") are missing, so it fits anchor 4 rather than the comprehensive anchor 5 and is clearly above the partial coverage of anchor 3.

Distinctiveness Conflict Risk

The explicit negative scope ("Not for checking readiness beforehand or closing the story after") carves a clear niche against sibling skills and, combined with the story-specific triggers, matches anchor 5 with minimal conflict risk.