Conciseness

Dense and free of known-concept padding, but the read-only/caller-ownership contract is restated at least four times ("Boundary (read this first)", "This unit does not read the caller's artifacts", "the caller owns the fmt/init/validate execution... this unit contributes only the read-only policy stage", "The caller applies the edit; this unit only reports"), and the exit-2 / never-synthesize caveats recur, so it could be meaningfully tightened.

Actionability

Mostly executable: copy-paste invocations for validate-terraform-policy.py and validate-migration-artifacts.py, an exit-code-to-action table, and a complete verdict JSON shape. Minor gaps: rds_windows.py has no invocation example ("Callers use its actual JSON values" with no command), and "$PLUGIN_ROOT/$TERRAFORM_DIR" placeholders must be resolved by the caller.

Workflow Clarity

The two-touchpoint flow is clearly sequenced via the routing table (author → Part 1; validate → Part 2), validation is explicit (exit-code table, "require exit 0" on the report checker, fail-safe exit-2 handling "do not treat as pass"), and the POLICY_FAIL row defines a concrete fix-and-retry feedback loop ("read violations[], edit the named .tf sites, re-run"), with a runnable verification test command.

Progressive Disclosure

Good structure: an overview with a routing table linking both references with a 'why' column, references verified one level deep (they point only to scripts), and all referenced scripts present. Minor gaps: the ~70-line inline policy-rule catalog duplicates the reference file's scope and belongs there, and the referenced fixtures/terraform-policy/ path has no counterpart in the bundle.

Specificity

Lists several concrete functions — "read-only policy gate", "reports whether the generated Terraform passes", "never edits .tf files, never touches .phase-status.json" — but "best-practice authoring guidance" is a mildly generic action and the concrete policy checks are not enumerated, so coverage has minor gaps rather than being comprehensive.

Completeness

Explicitly answers both: what ("Best-practice authoring guidance AND a read-only policy gate for AWS Terraform") and when ("Load during any phase that writes a terraform/ directory"), with the before/after sequencing adding further trigger specificity. Not a 4 because the 'when' clause is already fully explicit, not merely implied or vague.

Trigger Term Quality

Good natural keyword coverage: "AWS Terraform", "terraform/ directory", ".tf files", "migration skill", "terraform fmt/init/validate". A few natural variants users might say ("IaC", "infrastructure as code", "HCL") are missing, keeping it just below comprehensive.

Distinctiveness Conflict Risk

Clear niche (policy gate for migration-generated AWS Terraform) with a distinct trigger surface, and it explicitly differentiates itself from adjacent tooling ("Complements (does not replace) terraform fmt/init/validate"), minimizing wrong-skill triggering.