Conciseness

The body is dense with project-specific knowledge Claude cannot know (registry mechanics, dispatch precedence, NPU guards, CI file quirks) and wastes almost no tokens on general concepts. Minor over-explanation remains — e.g., the full kernels/ subtree listing with per-directory comments and the repeated design-doc pointers across sections — keeping it at 'minor instances of over-explanation that could be trimmed' rather than the lean level-5 anchor.

Actionability

Guidance is copy-paste ready: a complete KernelSpec registration example ("KERNEL_REGISTRY.register(KernelSpec(name=..., op_name=..., variant=..., factory=..., hardware=...))"), the matching OpSlot declaration ("veomni_my_op = OpSlot(\"my_op\", \"standard\")"), concrete commands ("pytest tests/ops/ -v", "make quality"), exact file paths, and pointers to live examples (rotary/__init__.py, rms_norm/__init__.py). This matches 'Fully executable; copy-paste ready code or commands' covering the common cases.

Workflow Clarity

Five clearly sequenced phases (Design → Implement → Test → Document → Finalize) with explicit validation checkpoints: run "pytest tests/ops/ -v", then "make quality", verify "KERNEL_REGISTRY.dump()" and OpSlot rebinding, and run "/veomni-review" before the PR. The Common Pitfalls section supplies error-recovery guidance for each failure mode ('the variant is invisible to _bind_veomni_ops()... you'll silently exercise the wrong kernel'), matching the level-5 anchor with validation steps and error feedback.

Progressive Disclosure

Structure is good: well-labeled phases, a clear decision guide for the three dispatch mechanisms, and clearly signaled one-level-deep pointers to deeper material (docs/design/kernel_selection.md, unified_kernel_registry.md, veomni/ops/README.md, .agents/knowledge/). However, the ~70-line inline architecture overview and directory tree are content that could live in a separate reference file, which is the 'minor organization gaps' of level 4 rather than the well-split level-5 anchor.

Specificity

The description enumerates concrete lifecycle actions — "implementing the kernel, registering it, adding tests, and documenting it" — and anchors them to a specific target directory (veomni/ops/), which is comprehensive coverage for this skill's scope. It matches the anchor 'Lists multiple specific concrete actions; comprehensive coverage' and exceeds the level-4 anchor, whose 'minor gaps in coverage' do not apply here.

Completeness

Both questions are answered explicitly: the 'what' is the full lifecycle ("understanding VeOmni's ops architecture... implementing the kernel, registering it, adding tests, and documenting it") and the 'when' is a dedicated "Trigger:" clause with concrete phrases. This mirrors the level-5 anchor example structure exactly; level 4 ('when' could be more explicit) is beaten by the explicit quoted trigger list.

Trigger Term Quality

Explicit trigger phrases — "'add op', 'new kernel', 'add attention variant', 'new fused op', 'add triton kernel', 'optimize operator'" — cover the natural phrasings and synonyms (op/kernel/operator, triton/fused/attention variants) a developer would actually say. This matches the comprehensive-synonyms anchor; level 4 ('a few natural terms missing') would apply only if common variants were absent, and they are not.

Distinctiveness Conflict Risk

The niche is tightly scoped — "adding a new optimized kernel or operator to veomni/ops/" with project-specific mechanics (KERNEL_REGISTRY, OpSlot) — so it is clearly distinguishable from generic coding skills and unlikely to trigger for the wrong skill. It matches 'Clear niche with distinct triggers; minimal conflict risk'; level 4's 'minor overlap risk with closely related skills' is not evident.