Conciseness

The body is largely efficient — it documents the shared wiring once, uses tight tables for coordinator kwargs, and points sibling concerns to other skills rather than re-explaining them. A few sentences edge toward over-explanation (e.g. unpacking "coordinator name is arbitrary" and the platform-neutral restatement), which keeps it just below a 5; not a 3 because there is no padded tutorial-style explanation of concepts Claude already knows.

Actionability

Provides fully executable, copy-paste-ready blocks for both `airflow.cfg` and environment-variable forms, with concrete classpaths, kwargs, and a worked `jvm_args` logging example. The troubleshooting table maps concrete symptoms to concrete fixes ("Set `main_class` explicitly", "Cross-compile with `--goos`/`--goarch`"); not a 4 because the common cases are covered with ready-to-run specifics.

Workflow Clarity

The "Verifying the configuration" section is a clearly sequenced checklist (runtime present → artifact directory populated → trigger DAG and read logs) with an explicit feedback loop in the troubleshooting table (fix JSON and restart, raise `task_startup_timeout`, re-pack after strip/sign). Configuration is a non-destructive act, yet verification steps are explicit; not a 4 because validation checkpoints and error-recovery guidance are present rather than just implied.

Progressive Disclosure

Good structure with well-signaled cross-skill pointers (authoring/deploy skills, Related Skills) and clean sectioning (the two settings, per-coordinator options, verifying). It is one level deep throughout with no nesting; not a 5 because some per-coordinator detail (e.g. the full kwargs tables and the JUL logging walkthrough) is inlined where a separate reference file could keep the overview leaner, and no bundle files exist to offload it.

Specificity

Lists multiple concrete actions — "register a coordinator", "map a queue to it", "ensure the runtime/artifact on workers", and "tune coordinator options" — giving comprehensive, specific coverage of what the skill does. It is not a 4 because the action list is comprehensive rather than having only minor gaps.

Completeness

Clearly states what ("Configures Airflow to run language SDK tasks... register a coordinator, map a queue...") and an explicit when ("Use when the user wants Airflow to route a queue... asks about the [sdk] settings... or why their native tasks aren't being picked up"). Both are concrete with explicit trigger phrases; not a 4 because the when-clause is fully explicit and specific.

Trigger Term Quality

Covers natural phrasings and exact config tokens a user would say — "route a queue to a native-language coordinator", `[sdk]` `coordinators`/`queue_to_coordinator`, `AIRFLOW__SDK__COORDINATORS`, `jars_root`, `executables_root`, `task_startup_timeout`, and the symptom "why their native tasks aren't being picked up". Comprehensive, including synonyms and exact setting names; not a 4 because no common variation is missing.

Distinctiveness Conflict Risk

Occupies a clear niche — Airflow native-language SDK coordinator routing — with distinct triggers (specific config keys and the task-pickup symptom) unlikely to fire for unrelated skills. It scopes itself apart from sibling authoring/deploy skills via the routing-mechanism framing; not a 4 because conflict risk is minimal, not just minor.