Conciseness

The body is dense, imperative, and entirely repo-specific (registry identity tuples, `SavedState` contracts, patchgen rules, NPU workflow entries); it explains nothing Claude already knows and contains no padded or motivational prose. Every section earns its place, matching the 'lean and efficient' anchor rather than the 4 anchor's 'minor instances of over-explanation'.

Actionability

Most guidance is executable and specific: a copy-paste-ready `register_op(...)` example with `GpuKernelRequirement(platforms=(NvidiaGpuPlatform(min_cc=80),))`, a concrete `pytest -q tests/ops/<kernel_name>/ tests/ops/base/` command, `make quality`, and `OP_REGISTRY.list_registered(...)`. It falls short of the 5 anchor because several steps name APIs without any example — e.g., constructing "a `VeomniOp` from `resolve_op_impl(...)`", the raw `forward`/`backward` pair's signature, and the pattern for guarding optional device packages are prose-only.

Workflow Clarity

The five phases (Design → Implement → Test → Document → Finalize) form a clear sequence with explicit validation checkpoints: "Run the family tests plus the registry and documentation guards", the finalize checklist ("Run `/veomni-review`", "Run `make quality`", "Verify `OP_REGISTRY.list_registered(...)`"), and a failure contract ("must fail clearly when its requirement is not satisfied; it must not silently fall back to eager"). Together with the Common Pitfalls checklist this matches the 5 anchor's explicit validation and checklist criteria, not merely the 4 anchor's 'most checkpoints'.

Progressive Disclosure

There are no bundle files (references/, scripts/, assets/ are absent), so the skill is judged on its own structure: well-organized sections (Before You Start, Ops Architecture, Phases 1–5, Common Pitfalls) with pointers to repo documentation clearly signaled one level deep (`.agents/knowledge/constraints.md`, `veomni/ops/README.md`, `docs/design/op_selection.md`). At ~140 lines of cohesive procedural guidance, nothing here clearly belongs in a separate file, so it does not drop to the 4 anchor's 'minor organization gaps'.

Specificity

The description lists multiple concrete, non-overlapping actions — "Add or optimize a tensor-level kernel in veomni/ops", "register its variants", "integrate it with models", "add numerical and registry tests" — which comprehensively cover the skill's workflow from implementation through testing. It matches the anchor for multiple specific concrete actions with comprehensive coverage; there is no generic filler to drop it to 4.

Completeness

Both questions are answered explicitly: the 'what' is the four concrete actions (add/optimize kernel, register variants, integrate with models, add tests) and the 'when' is an explicit "Trigger:" clause with concrete trigger phrases. This mirrors the anchor-5 example structure exactly; it is above 4 because the 'when' is explicit rather than merely present-but-imprecise.

Trigger Term Quality

The explicit trigger list provides natural synonyms a user would actually say: 'add op', 'new kernel', 'add attention variant', 'new fused op', 'add triton kernel', 'optimize operator' — covering op/kernel/operator and concrete kernel types (triton, fused, attention). Coverage is comprehensive with synonym variation, matching the top anchor; it does not fall to 4 since no common phrasing for this domain is obviously missing.

Distinctiveness Conflict Risk

The description names a clear niche — tensor-level kernels in veomni/ops with registry/model integration — and its triggers ('add triton kernel', 'new fused op', 'optimize operator') are specific to that niche, so the risk of firing for an unrelated skill is minimal. It is not a 4 because the domain scoping (veomni/ops, registry tests) leaves no meaningful overlap with adjacent skills.