StyleSeed

Make expert design judgmentrepeatable by coding agents.

StyleSeed turns recorded design decisions into project-local rules and implementation workflows. Support experts, not replace them with a collection of tastes. Open source, for Claude Code · Codex · Cursor.

Same product. Same prompt. Only the rules changed.

Measured on 120 rendered benchmark cells: the enforced gate improved both Codex and Claude Code by +5.3 points. Raw rules alone were inconsistent (Codex +1.6, Claude Code −3.7), which is why StyleSeed ships a render → score → revise loop—not a prompt dump. Read BENCH-V1 and inspect the raw evidence →

Easy Start (30 seconds)

Our goal is repeatable application of expert judgment, not a claim of expert-level output today. The engine compiles selected rules, preserves project choices, and supports code and rendered checks. A score does not replace human design acceptance. Product principles · Quality-first roadmap

1. Open a terminal in your project folder and run this command. Requires Node.js/npm.

Already installed? Update and consolidate your existing skill list. One request covers the same install scope, verified backup, and revision checks.

npx -y skills add bitjaru/styleseed -a codex claude-code -y --copy

Installs the core skills for Codex and Claude Code together, with no agent, skill, or install-mode menus. It copies the skills into this project. It does not install globally or change other projects.

2. Send one message to your agent. Start a fresh session if the skills do not appear.

• Codex: $styleseed Help improve this screen. Preserve our existing design choices and show me what needs a decision.
• Claude Code: /styleseed Help improve this screen. Preserve our existing design choices and show me what needs a decision.

Only styleseed is registered. It selects the needed internal workflow from your request. Choose unresolved design decisions together, then inspect the actual rendered result.

Only use one agent, or want to choose the options yourself?

• Codex only: npx -y skills add bitjaru/styleseed -a codex -y --copy
• Claude Code only: npx -y skills add bitjaru/styleseed -a claude-code -y --copy
• Cursor or another agent: npx skills add bitjaru/styleseed → your agent → Project → Copy.
• In the interactive list, Codex is already included under Universal. Do not look for it again under Additional agents.
• -y skips installer questions; it does not bypass your coding agent's tool permissions.

Claude Code guide · Codex guide · See examples · Need help?

Evaluating the repository?

Use the three-minute verification path to test a clean public install before trusting the README. The source-level evaluator quickstart then connects that install to the published release manifest, Windows PowerShell evidence, CI, SBOM, benchmark boundary, and production build.