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Implements Anthropic's March 2026 harness design pattern — a multi-agent architecture that separates generation from evaluation, creating an adversarial feedback loop that produces production-quality applications. Components: - 3 agent definitions (planner, generator, evaluator) - 1 skill with full documentation (skills/gan-style-harness/) - 2 commands (gan-build for full apps, gan-design for frontend) - 1 shell orchestrator (scripts/gan-harness.sh) - Examples and configuration reference Based on: https://www.anthropic.com/engineering/harness-design-long-running-apps Co-authored-by: Hao Chen <haochen806@gmail.com>
36 lines
1.6 KiB
Markdown
36 lines
1.6 KiB
Markdown
Parse the following from $ARGUMENTS:
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1. `brief` — the user's description of the design to create
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2. `--max-iterations N` — (optional, default 10) maximum design-evaluate cycles
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3. `--pass-threshold N` — (optional, default 7.5) weighted score to pass (higher default for design)
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## GAN-Style Design Harness
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A two-agent loop (Generator + Evaluator) focused on frontend design quality. No planner — the brief IS the spec.
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This is the same mode Anthropic used for their frontend design experiments, where they saw creative breakthroughs like the 3D Dutch art museum with CSS perspective and doorway navigation.
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### Setup
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1. Create `gan-harness/` directory
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2. Write the brief directly as `gan-harness/spec.md`
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3. Write a design-focused `gan-harness/eval-rubric.md` with extra weight on Design Quality and Originality
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### Design-Specific Eval Rubric
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```markdown
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### Design Quality (weight: 0.35)
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### Originality (weight: 0.30)
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### Craft (weight: 0.25)
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### Functionality (weight: 0.10)
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```
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Note: Originality weight is higher (0.30 vs 0.20) to push for creative breakthroughs. Functionality weight is lower since design mode focuses on visual quality.
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### Loop
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Same as `/project:gan-build` Phase 2, but:
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- Skip the planner
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- Use the design-focused rubric
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- Generator prompt emphasizes visual quality over feature completeness
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- Evaluator prompt emphasizes "would this win a design award?" over "do all features work?"
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### Key Difference from gan-build
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The Generator is told: "Your PRIMARY goal is visual excellence. A stunning half-finished app beats a functional ugly one. Push for creative leaps — unusual layouts, custom animations, distinctive color work."
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