Conciseness

The body is mostly dense operational guidance rather than explanations of known concepts, but it is noticeably redundant for a ~400-line SKILL.md: the full pricing JSON output shape appears twice verbatim ("Script execution model" example and Mode 1's "Required output shape"), the mandatory tagging rule is stated twice ("A create operation without these tags is INCOMPLETE and INCORRECT" then "Never omit these tags — they are required on every create operation"), and the Mode 2 worked-example JSON is ~40 lines of inline detail that belongs in the mode-2 reference. This fits anchor 3 — could be meaningfully tightened — better than anchor 4's "minor instances that could be trimmed".

Actionability

Fully executable throughout: complete AWS CLI commands with resolved flags (e.g., "aws keyspaces create-keyspace --replication-specification replicationStrategy=MULTI_REGION,regionList=[{region=us-east-1},{region=eu-west-1}]"), copy-paste bash blocks per mode ("cd scripts && npx ts-node --project tsconfig.scripts.json calculate.ts us-east-1 2000 800 1024 500 0 true"), exact JSON output shapes, per-feature UNSUPPORTED statuses with migration recommendations, and IAM permission scoping down to ARN patterns. Matches the anchor-5 example of copy-paste-ready commands covering common cases.

Workflow Clarity

Multi-step workflows are explicitly sequenced with validation checkpoints and error-recovery loops: dependency verification before any workflow, mandatory user confirmation before mutations ("Do NOT execute any create or modify operation without explicit user confirmation"), a refuse-list with a scripted refusal message for destructive ops, a Troubleshooting section mapping specific error messages to fixes ("parse-cassandra.ts exits with 'Usage: …' → --tablestats or --info missing. Recapture or use Mode 1"), and an anti-loop rule. This matches anchor 5's clear sequence with explicit validation and feedback loops.

Progressive Disclosure

Good structure with well-signaled, one-level-deep references: each task points to its specific reference file by path ("Load mode-1-manual-inputs.md ... for the pricing rate table"), all ten referenced files in references/ actually exist, and scripts/assets are cleanly separated. Below anchor 5 because the body inlines substantial content that would fit better in the references it already points to — the ~40-line Mode 2 worked example, the duplicated full JSON output shape, and the CDC view-type option descriptions — making the overview heavier than a lean dispatch document.

Specificity

Lists several concrete capability areas — "compatibility checks, pricing estimates, connection troubleshooting, pre-warming guidance, and infrastructure mutations" — plus an enumerated feature-coverage list (LWT/batch, secondary indexes, materialized views, TTL, PITR, CDC, auto-scaling). It sits between anchor 4 and 5: the action verbs are specific but "infrastructure mutations" is abstract and "authoritative" is mild buzzword padding, keeping it below the fully comprehensive anchor 5.

Completeness

The "what" is clear and detailed, but there is no "Use when..." clause or equivalent explicit trigger guidance — the closing sentence "Agents frequently produce incomplete or incorrect answers about Keyspaces feature support without this skill loaded" is a rationale for the skill's existence, not guidance on when to invoke it. Per the rubric, a missing explicit trigger clause caps completeness at 3.

Trigger Term Quality

Good keyword coverage with natural terms users would say: "Amazon Keyspaces", "Cassandra", "pricing", "migration", "compatibility", "troubleshooting", plus specific technical terms (PITR, CDC, UDTs, nodetool). Not anchor 5 because it lacks common user-phrase variations (e.g., "migrate my Cassandra cluster to AWS", "Keyspaces cost") and contains no use-when trigger phrasing; clearly above anchor 3's partial coverage.

Distinctiveness Conflict Risk

Clear niche with distinct triggers: the description is scoped to "Amazon Keyspaces (for Apache Cassandra)" with product-specific terminology (LWT, PITR, CDC, multi-region keyspaces) that no other skill would claim. Minimal conflict risk — it would not plausibly trigger for a non-Keyspaces request.