Conciseness

The body is dense and operational — it explains only Sentry-specific non-obvious behavior (e.g. "apps.get_model() returns a historical model class without custom save() methods") rather than concepts Claude already knows. Minor trimming is possible: the two-phase PR warning ("Write both up front, but they must be two separate PRs... merging them together drops the column/table while old code is still running") is repeated nearly verbatim in both the Deleting Columns and Removing a Model sections, and the commentary on keeping auto-generated comments ('useful context, not fluff') could be tightened.

Actionability

Guidance is mostly copy-paste ready: exact commands ("sentry django makemigrations <app_name> --empty", "bin/update-migration <migration_name>"), a complete TestMigrations example, and concrete test flags (--migrations, --reuse-db, --create-db). Minor gap: the migration operations example uses SafeRemoveField and DeletionAction without showing their imports, unlike the fully-imported TestMigrations example — so it is at the 4 anchor rather than fully executable at 5.

Workflow Clarity

Multi-step processes are explicitly sequenced with validation checkpoints: the After Generating list includes sqlmigrate verification and a local migrate run whose safety checks 'catch unsafe ops... before CI does'; the destructive column/table deletions mandate ordered makemigrations runs, two-PR deploy gating ('phase 2 can't merge until phase 1 has deployed'), and a pre-flight inbound-FK check. This matches the 5 anchor (explicit validation, feedback loops, checklists for complex processes), and the destructive-operation cap at 3 does not apply because validation is present.

Progressive Disclosure

No bundle files exist, and the single SKILL.md is well-sectioned with clear headers (Commands, After Generating, Guidelines, Resolving Merge Conflicts) and no buried references. It sits at the 4 anchor ('good structure; most content appropriately placed') rather than 5 because the specialized Deleting Columns / Removing a Model procedures (~60 lines of advanced material) could plausibly live in reference files to keep the always-loaded overview leaner.

Specificity

The description states concrete actions ("Generate or review Django database migrations for Sentry") and the Use-when clause enumerates comprehensive coverage: "creating or reviewing migrations and data migrations, adding/removing columns or tables, adding indexes, or resolving migration conflicts". This matches the anchor for multiple specific concrete actions with comprehensive coverage, not the 4 anchor's 'minor gaps'.

Completeness

It explicitly answers both: what ("Generate or review Django database migrations for Sentry") and when ("Use when creating or reviewing migrations and data migrations, adding/removing columns or tables, adding indexes, or resolving migration conflicts") with concrete trigger phrases. The 4 anchor requires a 'when' that could be more explicit, which does not apply here.

Trigger Term Quality

Natural terms include "migrations", "data migrations", "columns", "tables", "indexes", "migration conflicts" — phrasing a Sentry developer would actually say. A few natural variations are missing (e.g. "backfill", "schema change"), which matches the 4 anchor rather than the comprehensive-synonym coverage of 5.

Distinctiveness Conflict Risk

"Django database migrations for Sentry" carves out a clear niche with distinct triggers (migration conflicts, is_post_deployment-style operations), so it is unlikely to fire for an unrelated skill. It is well above the 4 anchor's 'minor overlap risk with closely related skills'.