Conciseness

The body is lean and assumes competence — e.g., "go test kills any test run after 10 minutes by default, and acceptance tests routinely exceed that" delivers only non-obvious knowledge. Minor trimming possible: the diagnose items repeat themselves slightly ("Offer verbose `go test` output. Use the `-v` option."). This is above the 3 anchor (mostly efficient, some unnecessary explanation) but not every token is maximally dense, so it does not reach 5.

Actionability

Fully executable, copy-paste-ready commands throughout: `go test -run=TestAccFeatureHappyPath -timeout 60m` with `TF_ACC=1`, the grep `grep -rn "os.Getenv" --include="*_test.go"`, `-count=1`, `-v`, `TF_LOG=debug`, `TF_ACC_WORKING_DIR_PERSIST=1`. The flip procedure gives concrete edit/run/undo steps. Matches the 5 anchor: specific commands cover the common cases.

Workflow Clarity

Sequences are explicit with validation checkpoints: a pre-run safety check ("Confirm the configured credentials point at a test account"), a cost warning before infrastructure is created, an explicitly ordered cumulative diagnosis escalation, a flip procedure with a pass/fail verification branch ("If the test fails, then undo the edit... Else, keep the edit and report an unsuccessful flip"), and post-run cleanup (sweepers) for interrupted runs. Feedback loops are present; matches the 5 anchor.

Progressive Disclosure

This is a single-file skill with no bundle files; all content is appropriately inline at this length (~55 lines) and cross-skill pointers ("provider-configuration", "provider-test-patterns") are clearly signaled one level deep. It falls short of 5 because there are no section headers organizing the distinct topics (run, diagnose, flip, cleanup), so navigation relies on paragraph structure.

Specificity

The description names the domain ("acceptance tests for a Terraform provider") and a couple of concrete actions ("running acceptance tests", "diagnosing a failing or suspiciously passing acceptance test"), but 'Guide for running' is generic and coverage is not comprehensive (e.g., the env-var/sweeper aspects are only hinted at). It sits above the 2-anchor (domain-only) because of the explicit diagnose action, but below 4, which requires several listed specific actions with only minor gaps.

Completeness

It explicitly answers both questions: what ("Guide for running acceptance tests for a Terraform provider") and when ("Use this when asked to run an acceptance test... or when diagnosing a failing or suspiciously passing acceptance test") with concrete trigger phrases. This matches the 5 anchor directly and exceeds 4, where the 'when' is only partially explicit.

Trigger Term Quality

Natural user phrases are well covered: "run an acceptance test", "test with the prefix `TestAcc`", "test fails with missing environment variables", "diagnosing a failing or suspiciously passing acceptance test". It falls short of 5 because it lacks synonyms and variations users might say (e.g., 'integration test', 'provider test', 'TF_ACC').

Distinctiveness Conflict Risk

The `TestAcc` prefix and "acceptance tests for a Terraform provider" carve out a clear niche with distinct triggers; it would not fire for generic test-running or the test-*writing* skill. Minimal conflict risk — matches the 5 anchor.