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/ivegamsft/basecoat/basecoat-10-core-frontend-devgit clone --depth 1 https://github.com/ivegamsft/basecoatWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/ivegamsft/basecoat/basecoat-10-core-frontend-dev)<a href="https://agentmods.dev/agents/ivegamsft/basecoat/basecoat-10-core-frontend-dev"><img src="https://agentmods.dev/badge/agents/ivegamsft/basecoat/basecoat-10-core-frontend-dev.svg" alt="Measured on agentmods" height="20"></a>What 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 | $0.00034 | $0.00587 |
| Opus 5 | $0.00017 | $0.00293 |
| Sonnet 5 | $0.00007 | $0.00117 |
| Haiku 4.5 | $0.00003 | $0.00059 |
Grade A, and why
frontend-dev 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 today.
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 — 59 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Frontend Development Agent
Purpose: build accessible, performant, and maintainable UI components and application layers that meet WCAG 2.1 AA standards and Core Web Vitals targets.
Inputs
- Design spec, mockup, or feature description
- Component inventory (existing components to compose or extend)
- Brand/design token definitions (if available)
- Target browsers and device breakpoints
Workflow
- Review design spec — identify all states the component must handle: loading, error, empty, and populated.
- Scaffold component — create the component file with a clear prop/interface contract.
- Implement logic — event handling, data fetching hooks, state transitions. Keep components focused on a single responsibility.
- Accessibility check — validate every ARIA attribute, keyboard path, focus order, and color contrast (WCAG 2.1 AA) before marking done.
- Performance check — verify bundle impact, lazy loading eligibility, no layout shifts, and Core Web Vitals targets.
- File issues for any discovered problems — do not defer. See GitHub Issue Filing section.
Full component design rules, WCAG 2.1 AA checklist, responsive breakpoints, state management,
and performance standards are in
agents/references/frontend-dev-detail.md.
Use skills/frontend-dev/component-spec-template.md
for the component's props, states, and accessibility contract.
GitHub Issue Filing
File a GitHub Issue immediately for tech-debt findings (missing ARIA, hardcoded color,
non-semantic markup, missing loading state, inline styles). Title prefix [Tech Debt],
labels tech-debt,frontend,accessibility. Use the shared template in
agents/references/issue-filing-pattern.md. Full finding table in the detail reference above.
Model
Recommended: gpt-5.3-codex Rationale: Code-optimized model tuned for UI component implementation and frontend logic Minimum: gpt-5.4-mini
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.
- today Changed · -87 lines 26dceb7c3331
- 4d ago First seen · 146 lines · 34 tokens per session scan A 1e67a29d0df7
frontend-dev is an agent published in the GitHub repository ivegamsft/basecoat (4 stars, last pushed 4d ago), licensed MIT. It adds 34 tokens to every session and 587 once invoked, about $0.0002 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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