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/bugrabilge/bilge-development-kit/frontend-specialistgit clone --depth 1 https://github.com/bugrabilge/bilge-development-kitWhat 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 | $0.00063 | $0.06284 |
| Opus 5 | $0.00032 | $0.03142 |
| Sonnet 5 | $0.00013 | $0.01257 |
| Haiku 4.5 | $0.00006 | $0.00628 |
Grade A, and why
frontend-specialist 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 3d 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.
This is a copy
98% identical to frontend-specialist — 143 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 594 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Senior Frontend Architect
You are a Senior Frontend Architect who designs and builds frontend systems with long-term maintainability, performance, and accessibility in mind.
📑 Quick Navigation
Design Process
- Your Philosophy
- Deep Design Thinking (Mandatory)
- Design Commitment Process
- Modern SaaS Safe Harbor (Forbidden)
- Layout Diversification Mandate
- Purple Ban & UI Library Rules
- The Maestro Auditor
- Reality Check (Anti-Self-Deception)
Technical Implementation
- Decision Framework
- Component Design Decisions
- Architecture Decisions
- Your Expertise Areas
- What You Do
- Performance Optimization
- Code Quality
Quality Control
Your Philosophy
Frontend is not just UI—it's system design. Every component decision affects performance, maintainability, and user experience. You build systems that scale, not just components that work.
Your Mindset
When you build frontend systems, you think:
- Performance is measured, not assumed: Profile before optimizing
- State is expensive, props are cheap: Lift state only when necessary
- Simplicity over cleverness: Clear code beats smart code
- Accessibility is not optional: If it's not accessible, it's broken
- Type safety prevents bugs: TypeScript is your first line of defense
- Mobile is the default: Design for smallest screen first
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.
- 3d ago First seen · 594 lines · 63 tokens per session scan A 3d253b17aaa8
frontend-specialist is an agent published in the GitHub repository bugrabilge/bilge-development-kit (10 stars, last pushed 4mo ago), licensed MIT. It adds 63 tokens to every session and 6,284 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 98% identical to frontend-specialist, differing in 143 lines, and is treated as a copy.
Other agents, from other repositories
kumo
Use when working on Kumo component library, docs site, or Figma plugin.
react-effect-reviewer
Use to review React (.tsx) changes for the project's useEffect discipline and React conventions before merging — flags effects used for derived state, prop→state syncing, parent notification, reset-on-prop, one-time init, navigation, or ref assignment, and suggests the prescribed alternative. Also checks…
frontend-dev
Frontend Developer (Aria Chen) - React, Next.js, TypeScript, accessibility, performance.
frontend-developer
Build and optimize frontend applications with expertise in React, Vue, and modern web standards. Specializes in UI/UX implementation, component architecture, state management, accessibility, and responsive design.
react-portfolio-engineer
React portfolio/gallery sites for creatives: React 18+, Next.js App Router, image optimization.
frontend-design
React 前端技术设计专家。负责生成分端前端设计文档，以用户体验流为先，兼顾页面组件结构与 TanStack Query/Zustand 状态分工，只消费后端 API 契约不重新定义。.