plankton: Write-time code quality enforcement system for Claude Code

by alexfazio · Agent Tool · ★ 371

Last updated: · Indexed by AgentSkillsHub · Auto-synced every 8h

How to install plankton

git clone https://github.com/alexfazio/plankton.git

Taken from the project's README on GitHub. Check the security audit before running it.

Security audit verdict: SAFE · quality 71/100

None of the 42 rules matched — no credential harvesting, no data exfiltration, no curl-pipe-shell installer. Scanned against 42 published rules built on the SlowMist agent-security taxonomy, refreshed every 8 hours. Full audit →

The quality score combines nine heuristic checks of the repo and its README: completeness, clarity, specificity, examples, structure, agent readiness, step-by-step content, instruction quality and security notes. It rates how well the project explains itself to an agent, not the code.

ai-agentsbiomebiomejsclaude-codecode-qualitydeveloper-toolsflake8hookslintingpython

Quick Facts

Stars371
Forks22
LanguageShell
CategoryAgent Tool
LicenseMIT
Quality Score71/100
Open Issues1
Last Updated2026-03-08
Created2026-02-06
Platformsclaude-code, cli
Est. Tokens~234k

About plankton

plankton Write-time code quality enforcement for AI coding agents, built on Claude Code hooks. [!CAUTION] Research project under active development. Hooks are tested against Claude Code = 2.1.50 (see badge). Newer CC versions usually work but are not guaranteed. Disable CC auto-updates to prevent silent breakage (see Quick Start). If you encounter issues, file a report including the output of .

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How this security grade is produced

Grades come from a rule-based scan built on the SlowMist agent-security taxonomy: 42 published rules, covering credential harvesting, data exfiltration, curl | sh installers and more. It is a first-layer scan, not a manual audit — we say so rather than overstate it.

The scale of the problem is documented independently: Liu et al. (2026), in a study of 31,132 agent skills, report that 26.1% contain security vulnerabilities. Our own full-catalog census is published as a citable open dataset.

Sources & who's responsible:

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