Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/planetscale/claude-plugin/03-postgres-safety-reviewnpx skills add planetscale/claude-plugin --skill 03-postgres-safety-reviewgit clone --depth 1 https://github.com/planetscale/claude-pluginWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/planetscale/claude-plugin/03-postgres-safety-review)<a href="https://agentmods.dev/skills/planetscale/claude-plugin/03-postgres-safety-review"><img src="https://agentmods.dev/badge/skills/planetscale/claude-plugin/03-postgres-safety-review.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00045 | $0.01892 |
| Opus 5 | $0.00023 | $0.00946 |
| Sonnet 5 | $0.00009 | $0.00378 |
| Haiku 4.5 | $0.00005 | $0.00189 |
Grade A, and why
planetscale-postgres-safety-review scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
This is a copy
98% identical to planetscale-postgres-safety-review — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 255 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Postgres safety review
Purpose
Recommend best practices for a PlanetScale Postgres database. Focus on availability protection, application isolation, recovery, safe automation, and observability. Do not apply changes.
Branch and schema workflow
PlanetScale Postgres branches do not use Vitess-style deploy requests. Schema changes are made directly to each branch, and production schema changes should be managed through the application’s normal migration workflow with a branch validation step.
Check:
- Whether a development or test branch exists.
- Whether branches are empty or restored from backup.
- Whether migrations are tested against a branch before production.
- Whether application migrations are reversible or have a documented rollback strategy.
- Whether production DDL is manually reviewed.
Recommend:
- Create or use a non-production branch for migration testing.
- Run migration validation and application tests against that branch.
- Treat production migration application as an explicit human-approved deployment step.
- Use PITR/backup restore branches for incident recovery, not as an automatic rollback mechanism.
Do not create branches, run migrations, or restore backups without approval.
Roles and least privilege
Check whether the application connects with the default role. Flag this as a safety gap.
Recommend:
- Use user-defined application roles, not the default role, for application servers.
- Separate roles by service, environment, and access pattern.
- Use read-only roles for analytics, dashboards, reporting, and agents that do not need writes.
- Use short-lived or purpose-limited roles for automation.
- When Terraform manages PlanetScale Postgres roles, prefer
planetscale_postgres_redacted_branch_rolefor roles whose password should stay out of Terraform state; reset the password through the API or dashboard and store it in the team's secret manager. - Document credential rotation without application downtime.
Do not create, reset, delete, or rotate roles without approval.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 5d ago First seen · 255 lines · 45 tokens per session scan A 4fdc94c15c52
planetscale-postgres-safety-review is a skill published in the GitHub repository planetscale/claude-plugin (4 stars, last pushed 4d ago), licensed Apache-2.0. It adds 45 tokens to every session and 1,892 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 98% identical to planetscale-postgres-safety-review, differing in 2 lines, and is treated as a copy.
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