sd0x-dev-flow: The harness layer for Claude Code — a reference implementation of harness engineering with hook-enforced dual

by sd0xdev · Claude Skill · ★ 188

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How to install sd0x-dev-flow

/plugin marketplace add sd0xdev/sd0x-dev-flow
/plugin install sd0x-dev-flow@sd0xdev-marketplace

Taken from the project's README on GitHub.

Security audit verdict: SAFE · quality 73/100

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.

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.

agent-harnessclaude-codeclaude-code-plugincodexharness-engineeringskills

Quick Facts

Stars188
Forks24
LanguageJavaScript
CategoryClaude Skill
LicenseMIT
Quality Score73/100
Open Issues7
Last Updated2026-08-14
Created2026-01-30
Platformsclaude-code, codex, node
Est. Tokens~19k

About sd0x-dev-flow

sd0x-dev-flow Language: English Español The harness layer for Claude Code. Quality gates that AI can't skip. A reference implementation of AI Agent Harness Engineering for Claude Code — hook-enforced dual review, state-machine gates that survive context compaction, and fail-closed safety where it counts.

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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:

View on GitHub → Browse Claude Skill tools