Conciseness

Dense and operational throughout: no explaining what Dagster, Airflow, dbt, or assets are; every section adds judgment policy Claude cannot infer (never stub, fix classes not instances, manifest conventions, go/no-go table). Not a 5 because the honesty theme is stated and restated ('honestly', 'the honest gate', 'the honest deliverable', the closing aphorism 'A migration guide that cannot say "don't" cannot be trusted when it says "do"') — rhetorical repetition that could be tightened without losing the rule.

Actionability

Concrete and verified: 'python3 scripts/inventory.py <dagster_repo> --out manifest.json', 'python3 scripts/validate_dag.py <astro_project> --manifest manifest.json', the state machine with exact status.py subcommands (advance/defer/reopen/summary), manifest field names, and version probes like 'python3 -c "from airflow.sdk import X"' — the bundled scripts' actual argparse matches these invocations. Not a 5: 'status.py advance <unit-id> ...' elides its arguments, and most executable how-to detail (mapping rows, gate definitions, troubleshooting classes) is deferred to reference files that are not present in this bundle, so the guidance chain cannot actually be followed end-to-end.

Workflow Clarity

Phases 0-7 are clearly sequenced with validation woven through: baseline tests before migrating, trial units through every gate before fanning out, the six-gate ladder with a per-unit state machine, an explicit retry cap ('cap ~10 attempts, then defer with the failure class'), a completeness gate ('status.py summary exits nonzero otherwise; run it before claiming done'), per-unit atomic commits, one-domain-per-window cutover with rollback one step away, and a spot-check of ten complete claims before the final report. Matches the anchor-5 example: explicit validation steps, feedback loops, and checklists for a complex batch process.

Progressive Disclosure

The in-body structure is excellent — overview, at-a-glance steps, hard rules, phase workflow, and a routing table that clearly signals one-level-deep references — but the actual bundle contains no 'reference/' (or 'references/') directory: all 11 routed files (quickstart.md, mapping.md, assets.md, io-and-data-passing.md, partitions.md, automation.md, dbt.md, components.md, astro-deployment.md, validation.md, troubleshooting.md) are absent, while the scripts they are scored against do exist. Per the guideline to score against the actual bundle structure, every navigation link to the core knowledge is a dead end, which is a more severe delivery failure than the anchor-3 defect (weakly signaled references). If the reference files exist in the full skill bundle and were simply not shipped for review, this dimension would rate 4-5 on structure alone.

Specificity

Names the domain and several concrete capabilities — 'Guide for migrating Dagster projects to Apache Airflow 3 on Astro', 'plan or assess such a migration', 'asks what a Dagster construct maps to in Airflow' — plus a comprehensive construct coverage list ('assets, partitions, schedules, sensors, declarative automation, resources, IO managers, ops/jobs, dbt, Pipes, Components'). Not a 5 because the actions are facets of one migration task rather than multiple distinct concrete actions (contrast 'extract text, fill forms, merge documents, convert pages'). Not a 3 because coverage goes well beyond 1-2 actions and is explicitly enumerated.

Completeness

Explicitly answers both questions: the 'what' is 'Guide for migrating Dagster projects to Apache Airflow 3 on Astro' with a full coverage list, and the 'when' is an explicit 'Use when the user mentions migrating, converting, or porting...' clause with concrete trigger phrases. Matches the anchor-5 example pattern exactly.

Trigger Term Quality

Comprehensive natural-term coverage with synonyms: 'migrating, converting, or porting Dagster (or Dagster+) code to Airflow or Astro' plus the secondary trigger 'what a Dagster construct maps to in Airflow'. These are exactly the phrases a user with this need would say; no obvious synonym or variation is missing.

Distinctiveness Conflict Risk

A clear niche — Dagster-to-Airflow/Astro migration — with distinct trigger terms (Dagster, Dagster+). Minimal conflict risk: nothing else plausibly triggers on these phrases, and a generic Airflow skill would only fire here because Dagster is mentioned, which is the intent.