Conciseness

The body is mostly dense, useful configuration and code rather than padded prose, but it carries clear duplication that should be tightened: the full ~140-line CodeDeploy Terraform block in 'Terraform with CodeDeploy' largely repeats what is already in references/blue-green-setup.md, the deployment_circuit_breaker HCL appears verbatim in both the 'Rolling Updates' and 'Deployment Circuit Breaker' sections, the ASCII architecture diagram is duplicated in the reference file, and the ~50-line GitHub Actions workflow duplicates content attributed to references/cicd-pipelines.md. This fits 'Mostly efficient but includes some unnecessary explanation or could be tightened' rather than anchor 4, whose minor trimmings do not approach this volume of redundant tokens.

Actionability

The guidance is mostly executable and copy-paste ready: complete Terraform resources, a boto3 rolling-update function with a realistic usage call, a deployment monitor that checks rolloutState, a CodeDeploy create_deployment trigger, and a manual rollback function. It falls short of 5 on minor gaps: shift_traffic() references undefined variables (rule_arn, stable_tg_arn, canary_tg_arn are never passed as parameters or defined), wait_for_deployment depends on the module-level ecs client from a previous snippet, and rollback_to_previous naively assumes revision-1 is the previous good version. These are gaps, not pseudocode, so it is clearly above anchor 3.

Workflow Clarity

Sequences are clearly laid out (the 5-step rolling-update behavior, the 4-step circuit-breaker operation) and validation checkpoints exist for the risky deployment operations: wait_for_deployment detects FAILED rolloutState and reports rolloutsStateReason, circuit breaker rollback and CodeDeploy auto_rollback_configuration provide automatic failure recovery. The gap keeping it at 4 rather than 5 is the canary workflow, where '# Monitor metrics...' is a placeholder with no concrete guidance on which metrics to check or how to abort a bad canary; the destructive-operation cap at 3 does not apply because validation and auto-rollback are explicitly present, not missing.

Progressive Disclosure

Section structure itself is good (Quick Reference table, per-strategy sections, a dedicated 'Progressive Disclosure' section), but scored against the actual bundle: of the three files referenced in 'Detailed References', only references/blue-green-setup.md exists — references/cicd-pipelines.md and references/deployment-monitoring.md are dangling. Meanwhile the content that belongs in those files (the full GitHub Actions workflow, the duplicated CodeDeploy Terraform) is inlined in SKILL.md, matching anchor 3's 'content that should be separate is inline'. It does not reach anchor 4 because broken navigation to two of three references is more than a 'minor organization gap'.

Specificity

Lists multiple concrete, specific actions with comprehensive coverage: "rolling updates, blue-green with CodeDeploy, canary releases, and GitOps workflows" plus "deployment circuit breakers, rollback strategies, and production deployment patterns". It clearly matches the anchor 'Lists multiple specific concrete actions; comprehensive coverage' rather than the anchor 4 example, which presumes minor gaps in coverage; every major ECS deployment strategy is named. Third person voice is used consistently ('Covers deployment circuit breakers'), so no voice penalty applies.

Completeness

Explicitly answers both what ("ECS deployment strategies including rolling updates, blue-green with CodeDeploy, canary releases, and GitOps workflows") and when ("Use when deploying ECS services, implementing blue-green deployments, setting up CI/CD pipelines, or managing production releases") with concrete trigger phrases — a direct match for the anchor 5 example pattern. It is not a 4, since the 'when' clause is not merely present but enumerates four specific triggering scenarios.

Trigger Term Quality

Good keyword coverage of natural phrases users would say: "ECS deployment", "rolling updates", "blue-green deployments", "canary releases", "CI/CD pipelines", "production releases". Not a 5 because common variations and synonyms are missing (e.g., 'AWS ECS', 'Fargate', 'task definition', 'ECR'), whereas the 5 anchor expects comprehensive coverage including synonyms and extensions; it is well above the 3 anchor ('some relevant keywords but missing common variations') because most natural deployment phrasings are present.

Distinctiveness Conflict Risk

A clear niche (ECS deployments) with distinct trigger terms like CodeDeploy, canary releases, and circuit breakers. Minor overlap risk remains with closely related skills the body itself names ('boto3-ecs', 'terraform-ecs'), whose scope could collide on ECS configuration tasks; it does not reach the 5 anchor's 'minimal conflict risk' because terms like 'CI/CD pipelines' could also plausibly route to a generic CI/CD skill.