Conciseness

The body avoids explaining concepts Claude already knows and stays in terse bullets, but the core 2D-default decision rule is restated across at least four sections ("Default to a 2D Phaser path unless...", the Routing Rules classification, Default Workflow step 3, and "preserve the plugin default: 2D Phaser first"), and the Use/Do-Not-Stay-Here sections overlap the Routing Rules. This matches anchor 3 ('mostly efficient but ... could be tightened') rather than anchor 4, whose over-explanation is only minor.

Actionability

As an instruction-only router skill it gives concrete, executable guidance: six classification categories with named engines, explicit routing targets with file paths (e.g. "Deep 2D implementation: ../phaser-2d-game/SKILL.md"), and a concrete Examples section. It is not a 5 because a few steps stay high-level ("Lock the game fantasy and player verbs") and the final routing act depends on judgment rather than a fully specified procedure.

Workflow Clarity

The Default Workflow is a clearly sequenced six-step plan (fantasy/verbs, core loop, track choice, UI surface, asset workflow, playtest) with a closing validation gate ("Close with a playtest loop before calling the work production-ready"). It matches anchor 4 ('clear sequence with most checkpoints present; minor validation gaps') rather than 5, since the playtest loop is a single end-stage checkpoint with no error-recovery detail and mid-work checkpoints are implicit.

Progressive Disclosure

The References section is well signaled and one level deep (eight topic-labeled files), but the bundle contains no references/, scripts/, or assets/ directories — every path like "../../references/threejs-stack.md" and "../phaser-2d-game/SKILL.md" resolves outside the skill directory to files that do not exist in this bundle, so navigation actually fails. Structure is present but the dangling references keep it at anchor 3 rather than 4.

Specificity

Quotes like "Route early browser-game work" and "stack selection and workflow planning across design, implementation, assets, and playtesting" list several concrete actions across four named domains. It sits between anchor 3 (only 1-2 concrete actions) and anchor 5 (comprehensive, highly concrete action list like 'extract text, fill forms, merge documents, convert pages'), so 4 fits best.

Completeness

Both parts are explicit: what ("Route early browser-game work" with stack selection and workflow planning) and when ("Use when the user needs stack selection and workflow planning across design, implementation, assets, and playtesting"). The 'when' clause is present but phrased abstractly rather than with concrete trigger phrases a user would actually say, which is exactly anchor 4, not anchor 5.

Trigger Term Quality

Relevant keywords are present ("browser-game", "stack selection", "design, implementation, assets, playtesting") but common user phrasings are missing: no "browser game"/"web game" variations, no engine names (Phaser, Three.js, 3D), and no "help me build a game" style triggers. This matches anchor 3 ('some relevant keywords but missing common variations or synonyms') rather than anchor 4, whose keyword coverage is near-complete.

Distinctiveness Conflict Risk

The niche is clear ("Route early browser-game work ... before moving to a specialist skill") and the early-stage/routing framing separates it from the specialists it routes to. There is still minor overlap risk with those closely related specialist skills (a Three.js or Phaser request could match either this router or the specialist), matching anchor 4 rather than anchor 5's 'minimal conflict risk'.