Conciseness

The body is dense and operational — nearly every sentence carries a command, a flag, or a failure mode, and basic concepts are correctly pushed to the reference file. Minor instances of over-explanation could be trimmed (e.g. "An ignore rule doesn't stop Git from committing a file it already tracks"), and time-sensitive version numbers (2.10.1, 2.2.4, 2.10.0, 2.9.0, pg_dump 17 vs 18) are woven through the text rather than quarantined in a changelog/deprecated section, keeping this at 4 rather than 5. Not 3, since the version notes are operationally load-bearing and the padding is truly minor.

Actionability

Every step is a copy-paste-ready executable shell command: the full env-loading subshell with tracing off and inherited-variable scrubbing, `npx -y backupdrill@2.10.1 estimate/backup/drill/restore`, the mktemp report capture, the config check script, and per-error fixes. Commands cover the common cases exactly as the 5 anchor requires.

Workflow Clarity

The workflow is clearly sequenced (credentials check → prerequisites → egress estimate → backup → drill → restore → schedule) with explicit validation: the config-check script runs before the first command, the destructive restore is gated by a dry run, shown results, explicit user confirmation, and `--snapshot <timestamp> --confirm-target <ref>` pinning, and a "When something fails" section gives error-to-fix feedback loops. This matches the 5 anchor's explicit validation and recovery guidance; the destructive-operation cap does not apply because validation is present.

Progressive Disclosure

Sectioning is good and the one-level reference to [references/postgres-backup-basics.md] is well signaled and exists, but the body also links [assets/scheduled-backup.yml] and instructs the user to copy it — and no assets/ directory exists in the bundle, so that workflow step is broken at navigation time. A dangling referenced path is more than the 4 anchor's "minor organization gaps", landing this at 3.

Specificity

The description lists five concrete, distinct actions — "back up a Supabase project to their own S3, R2 or B2 bucket", "estimate what those backups add to their Supabase egress bill", "check that a backup actually restores (a restore drill in Docker)", "schedule backups in GitHub Actions", and "restore a backupdrill snapshot into a new Supabase project" — comprehensively covering the tool's capabilities with no gaps, matching the 5 anchor rather than the 4 anchor's "minor gaps in coverage".

Completeness

It opens with an explicit "Use when the user wants to…" trigger clause enumerating five concrete conditions, and the same sentence concretely states what the skill does — clearly answering both what and when, matching the 5 anchor's exemplar. Not 4, because the 'when' is fully explicit with concrete trigger phrases rather than merely present.

Trigger Term Quality

Good natural-keyword coverage: "back up", "Supabase", "S3, R2 or B2", "restore", "restore drill", "egress bill", "GitHub Actions", "snapshot" are phrases users would plausibly say. A few natural variants are missing (e.g. "off-site copy", "archive my database", "test my backup"), which fits the 4 anchor rather than the 5 anchor's comprehensive synonym and extension coverage.

Distinctiveness Conflict Risk

"Supabase project", "backupdrill CLI", and "their own S3, R2 or B2 bucket" define a clear niche with distinct triggers and minimal overlap risk with generic Postgres or file skills, matching the 5 anchor.