Lean body of code/commands and tables with no padding explaining what a test runner is; it skips concepts Claude knows and every section earns its place ("Pytest's session-scoped fixtures cover similar territory" is a brief useful contrast, not filler).

Fully executable, copy-paste-ready guidance throughout: install command, runnable test examples, concrete cfg snippets, layers/params/attr code, and exact CLI invocations ("nose2 -A 'type=integration'", "coverage run -m nose2").

Clearly sequenced Step 1 through Step 9 with validation-aware guidance for risky ops: the Anti-patterns table flags layer state leaks, and CI/coverage steps include a concrete fail-under checkpoint ("coverage report --fail-under=80").

The ~225-line body is a single monolithic SKILL.md with no bundle files and no one-level-deep references; content like the full plugin/migration/anti-pattern tables could be split into referenced files, so organization is good but not progressively disclosed.

Lists multiple concrete capabilities: "Configures and runs nose2", "plugin architecture, layers ... parameterized tests via nose2.tools.params, multi-process parallelism via mp plugin", rather than vague language.

Clearly answers both what (configures/runs nose2 with plugins, layers, params, mp) and when ("Use when migrating from legacy nose1 codebases or when the team prefers nose2's plugin model over pytest") with explicit triggers.

Natural terms a user would say are well covered: "nose2", "nose", "pytest", "migrating from legacy nose1", "plugin model", "parameterized tests", "layers".

Distinct niche framed explicitly against pytest and nose1 ("successor to nose ... alternative to pytest's discovery model"), so it is unlikely to trigger for the wrong skill.