PlanetScale Claude Plugin installs a PlanetScale MCP server, which lets Claude Code communicate with PlanetScale, together with database and PlanetScale-specific skills. It is for people using Claude Code with a PlanetScale account and authenticated database features. The catalogue entries are the plugin and skills supplied by this project.
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 skills add planetscale/claude-plugin --skill 11-change-gates-and-approval-contractgit 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/11-change-gates-and-approval-contract)<a href="https://agentmods.dev/skills/planetscale/claude-plugin/11-change-gates-and-approval-contract"><img src="https://agentmods.dev/badge/skills/planetscale/claude-plugin/11-change-gates-and-approval-contract/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/planetscale/claude-plugin/11-change-gates-and-approval-contract"><img src="https://agentmods.dev/badge/skills/planetscale/claude-plugin/11-change-gates-and-approval-contract.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00033 | $0.01059 |
| Opus 5 | $0.00016 | $0.00530 |
| Sonnet 5 | $0.00007 | $0.00212 |
| Haiku 4.5 | $0.00003 | $0.00106 |
Grade A, and why
planetscale-change-gates-and-approval-contract 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 11d 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
95% identical to planetscale-change-gates-and-approval-contract — 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 — 160 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Change gates and approval contract
Purpose
Prevent accidental or autonomous changes that can affect availability, safety, security, data, or developer workflows.
Operation classes
Class A: read-only by default
Allowed without approval:
- List databases, branches, keyspaces, webhooks, backups, roles, traffic budgets, schema recommendations, deploy requests, and Insights data.
- Inspect repository code.
- Read schema metadata.
- Read non-sensitive database metadata.
- Produce reports and proposed change sets.
Class B: state-creating proposals
Allowed by default; requires approval only when the operator has demanded strict no-mutation mode:
- Creating a query-pattern report through an API POST, even if the result is read-only telemetry.
- Triggering a webhook test event.
- Creating temporary local branches or files.
- Opening PRs or issues in external tools.
- Creating database development branches.
- Applying DDL or migrations to non-production development branches.
- Opening deploy requests targeting a branch protected by a review workflow.
The last three are proposals inside an existing review system: nothing reaches production until a human merges or deploys. The gate belongs on the merge/deploy action (Class C/D), not on proposal creation. An agent that stops to ask permission to open a PR is misclassifying.
Class C: behavior-changing
Always requires explicit approval:
- Enable safe migrations.
- Disable safe migrations.
- Change deploy request approval settings.
- Create/update/delete Traffic Control budget or rule.
- Move Traffic Control budget to enforce mode.
- Create/update/delete webhook.
- Enable raw query collection.
- Enable/disable extensions or settings that require restart.
- Create/update/delete role.
- Reset passwords.
- Change pg_strict settings.
- Change connection pooling behavior.
- Change IP restrictions, PrivateLink, PSC, or public access.
- Change backup schedule or retention.
- Create restore branch.
- Create backup beyond automatic backups.
- Change branch size or replica topology.
- Edit repository files or dependencies.
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.
- 11d ago First seen · 160 lines · 33 tokens per session scan A b289876a6269
planetscale-change-gates-and-approval-contract is a skill published in the GitHub repository planetscale/claude-plugin (4 stars, last pushed 10d ago), licensed Apache-2.0. It adds 33 tokens to every session and 1,059 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 95% identical to planetscale-change-gates-and-approval-contract, differing in 2 lines, and is treated as a copy.
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