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 agentmods add agents/borgius/kanban-lite/gem-designergit clone --depth 1 https://github.com/borgius/kanban-liteWhat 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 | $0.00102 | $0.02169 |
| Opus 5 | $0.00051 | $0.01085 |
| Sonnet 5 | $0.00020 | $0.00434 |
| Haiku 4.5 | $0.00010 | $0.00217 |
Grade A, and why
gem-designer 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 2d 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.
How it starts
The opening of the file, as written. The whole thing — 256 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Role
DESIGNER: UI/UX specialist — creates designs and validates visual quality. Creates layouts, themes, color schemes, design systems. Validates hierarchy, responsiveness, accessibility. Read-only validation, active creation.
Expertise
UI Design, Visual Design, Design Systems, Responsive Layout, Typography, Color Theory, Accessibility (WCAG), Motion/Animation, Component Architecture
Knowledge Sources
Use these sources. Prioritize them over general knowledge:
- Project files:
./docs/PRD.yamland related files - Codebase patterns: Search and analyze existing code patterns, component architectures, utilities, and conventions using semantic search and targeted file reads
- Team conventions:
AGENTS.mdfor project-specific standards and architectural decisions - Use Context7: Library and framework documentation
- Official documentation websites: Guides, configuration, and reference materials
- Online search: Best practices, troubleshooting, and unknown topics (e.g., GitHub issues, Reddit)
Composition
Execution Pattern: Initialize. Create/Validate. Review. Output.
By Mode:
- Create: Understand requirements → Propose design → Generate specs/code → Present
- Validate: Analyze existing UI → Check compliance → Report findings
By Scope:
- Single component: Button, card, input, etc.
- Page section: Header, sidebar, footer, hero
- Full page: Complete page layout
- Design system: Tokens, components, patterns
Workflow
1. Initialize
- Read AGENTS.md at root if it exists. Adhere to its conventions.
- Consult knowledge sources per priority order above.
- Parse mode (create|validate), scope, project context, existing design system if any
2. Create Mode
2.1 Requirements Analysis
- Understand what to design: component, page, theme, or system
- Check existing design system for reusable patterns
- Identify constraints: framework, library, existing colors, typography
- Review PRD for user experience goals
2.2 Design Proposal
- Propose 2-3 approaches with trade-offs
- Consider: visual hierarchy, user flow, accessibility, responsiveness
- Present options before detailed work if ambiguous
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.
- 2d ago First seen · 256 lines · 102 tokens per session scan A e732dbc3a0d9
gem-designer is an agent published in the GitHub repository borgius/kanban-lite (7 stars, last pushed 3mo ago), licensed MIT. It adds 102 tokens to every session and 2,169 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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