Conciseness

Roughly 62 lines with zero explanation of concepts Claude already knows; every sentence carries project-specific information — exact file paths, commands, and non-obvious failure modes ("pushed into the ElasticSearch index mapping at startup even when the flag is off, and nothing fails"; "a registered manager shows in the platform modules and startup logs even when the flag is off"). Lean and efficient; every token earns its place.

Actionability

Fully executable guidance throughout: exact code ("export const MY_FEATURE_FEATURE_FLAG = 'MY_FEATURE';", "featureFlag: MY_FEATURE_FEATURE_FLAG,", "@ff(flags: [\"MY_FEATURE\"])", "if (isFeatureEnabled(MY_FEATURE_FEATURE_FLAG)) { registerManager(DEFINITION); }", "const { isFeatureEnable } = useHelper();"), commands ("yarn build:schema", "yarn relay", "grep -rn ..."), an env-var recipe ("APP__ENABLED_DEV_FEATURES='[\"MY_FEATURE\"]'"), and specific file paths. Copy-paste-ready with an in-repo exemplar for the manager case.

Workflow Clarity

Steps 1–7 are clearly sequenced, and Step 7 is an explicit validation checklist of expected outcomes for both flag-disabled and flag-enabled states. Feedback loops are present ("Re-read every attribute you added before moving on", the grep audit, and "verify that no declarations or guards for this flag remain" after removal). Validation for this batch, multi-file operation is present, so the missing-validation cap does not apply.

Progressive Disclosure

The operational core lives inline while "Full rules and rationale" and manager details are deferred to a clearly signaled, one-level-deep reference ([Feature Flags](../../instructions/backend/patterns/feature-flags.md)), with an in-repo exemplar file ("src/manager/workflowStatusCleanupManager.ts") cited rather than inlined. Clear overview with well-signaled references; the external placement of the detail doc is appropriate for a repo-embedded skill.

Specificity

Lists multiple specific concrete actions with named domain artifacts — "putting a new or existing feature behind a feature flag (dev feature) in OpenCTI", "adding attributes, GraphQL endpoints, managers or UI", "removing a feature flag" — covering the full add/gate/remove lifecycle. Anchor 4's "minor gaps in coverage" does not apply since every lifecycle phase is explicitly named.

Completeness

Explicit "Use when:" trigger guidance is present, and the gerund action list ("putting... behind a feature flag", "adding attributes, GraphQL endpoints, managers or UI", "removing a feature flag") states what the skill does with the same concreteness as the anchor-5 exemplar. Both what and when are explicitly and concretely answered; anchor 4's weakness (an insufficiently explicit 'when') does not apply.

Trigger Term Quality

Natural trigger phrases users would actually say are comprehensively covered: "feature flag" (twice), "dev feature" (the platform's synonym), "OpenCTI", "hidden until a flag is enabled", and "removing a feature flag". Both canonical synonyms for this domain are present, matching the comprehensive-synonyms anchor rather than anchor 4's "a few natural terms missing".

Distinctiveness Conflict Risk

"in OpenCTI" combined with the flag-gating qualifier ("must be hidden until a flag is enabled") carves a clear niche that is distinguishable from generic attribute, GraphQL, manager, or UI work. Minimal conflict risk with other skills.