Conciseness

Largely lean — it defers Django syntax, migrations, and outbox plumbing to other skills and assumes competence — but a few asides could be trimmed, e.g. the generic Postgres varchar/TOAST storage explanation justifying the max_length=256 guidance. Efficient but not quite "every token earns its place".

Actionability

A fully executable, copy-paste-ready skeleton with real imports and concrete conventions throughout: exact decorators and base classes (@cell_silo_model, DefaultFieldsModel, ReplicatedCellModel), a relocation-scope decision table, explicit FK typing rules with on_delete string values, and precise file paths.

Workflow Clarity

A clear ordered sequence — "decide all four" coupled decisions before writing fields, then a skeleton, then numbered post-design steps that route to sibling skills — with the runtime __relocation_scope__ check noted as a guard. It lacks an explicit validate-the-design checkpoint or feedback loop, so it does not reach the 5 anchor.

Progressive Disclosure

Well-organized sections with clearly signaled, one-level-deep pointers to sibling skills (generate-migration, hybrid-cloud-outboxes, hybrid-cloud-rpc). However, the ~124-line body keeps convention detail inline that could be split into a reference file, so content is not "appropriately split" at the 5 anchor.

Specificity

The description enumerates multiple concrete actions — "adding a new Django model, designing a model for a feature, deciding where data should live, picking a foreign key type, or refactoring an existing model's silo placement" — covering the skill's scope comprehensively with no evident gaps.

Completeness

It explicitly answers both what ("Design Django ORM models for Sentry following architectural conventions for silos, replication, relocation, and foreign keys") and when, via a concrete "Use when..." clause listing five trigger scenarios.

Trigger Term Quality

Trigger phrases are natural user phrasings with good synonym coverage: "add a Django model", "create a model", "new database table", "store this data in the DB", "I need to track Y", "model for [feature]" — the kind of language a user would actually say.

Distinctiveness Conflict Risk

A clear niche (Django ORM models in the Sentry codebase) reinforced by an explicit exclusion clause — "Not for Pydantic models, dataclasses, ML models, or Protobuf" — keeping conflict risk with similar-sounding skills minimal.