Conciseness

The body is lean and code-first, assumes competence (never explains dataclasses, protocols, or registries), and conveys repo-specific knowledge via compact tables. It falls short of anchor 5 only on minor trims: Step 2 points to src/sentry/notifications/platform/types.py twice with near-duplicate sentences ("> For examples, load..." and "All NotificationCategory options are defined in...").

Actionability

Every step ships copy-paste-ready code: the dataclass, template registration via @template_registry.register, the sending pattern with rollout guard, the get_renderer override, and three complete test classes, plus a runnable pytest command. All file paths are concrete, matching the anchor-5 'fully executable; copy-paste ready' example.

Workflow Clarity

Step 1's routing table dispatches to the right operation, steps are explicitly sequenced with a directive to continue to Test and Verify, and Step 9 is a pre-flight checklist with a specific test command. Validation is reinforced by a named guardrail test (test_example_links_are_classified), satisfying the anchor-5 'explicit validation steps; checklists' description.

Progressive Disclosure

SKILL.md stays an overview and offloads depth to four clearly signaled blockquote pointers (references/data-and-templates.md, targets-and-sending.md, custom-renderers.md, provider-template.md), all of which exist in the bundle. References are exactly one level deep with no nested indirection, matching the anchor-5 'clear overview with well-signaled one-level-deep references'.

Specificity

Lists three concrete, distinct actions ("adding notifications, custom renderers, or new providers") scoped to Sentry's NotificationPlatform, matching the 'several specific actions; minor gaps' anchor. It stays below anchor 5 because the actions are named at a high level without finer-grained capabilities (e.g., defining data/templates, rollout registration, testing), and above anchor 3 because more than 1-2 actions are explicitly covered.

Completeness

Explicitly answers both: what it does ("Guide for adding notifications, custom renderers, or new providers to Sentry's NotificationPlatform") and when to use it ("Use when asked to..." followed by concrete trigger phrases). This mirrors the anchor-5 example structure exactly, and the 'when' clause is present so it cannot be a 3 or below.

Trigger Term Quality

Eleven quoted natural phrases a user would actually say, including synonyms and provider-specific variants ("add notification", "send notification", "send email notification", "send slack notification", "NotificationPlatform"). Comprehensive natural-term coverage matches the top anchor; no common variation of the request is obviously missing.

Distinctiveness Conflict Risk

The scope is clearly niched to Sentry's NotificationPlatform with distinctive triggers ("NotificationPlatform", "notification renderer"), but generic phrases like "notify user" and "send notification" carry minor overlap risk with other notification-related work in the same codebase. This fits 'mostly distinct; minor overlap risk' rather than anchor 5's 'minimal conflict risk'.