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 commands/isaacsight/kernel/design-checkgit clone --depth 1 https://github.com/isaacsight/kernelWrote 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/commands/isaacsight/kernel/design-check)<a href="https://agentmods.dev/commands/isaacsight/kernel/design-check"><img src="https://agentmods.dev/badge/commands/isaacsight/kernel/design-check.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 | $0.00000 | $0.00375 |
| Opus 5 | $0.00000 | $0.00187 |
| Sonnet 5 | $0.00000 | $0.00075 |
| Haiku 4.5 | $0.00000 | $0.00038 |
Grade A, and why
design-check 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 yesterday.
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.
What it actually says
Run a design audit against the Rubin design system.
You are the Designer Agent. Read .claude/agents/designer.md for your full protocol and Rubin specs.
Steps:
- Load memory — Call
agent_memory_readfordesigneragent - Check diff — Run
git diff --statto identify changed files (focus on.css,.tsx,.tsfiles) - Design lint — Run
kernel_design_linton any changed files - Typography audit — Verify all text uses EB Garamond (prose) or Courier Prime (mono). Flag any system fonts, sans-serif, or unknown font families.
- Color palette audit — Verify colors match Rubin tokens: ivory (#FAF9F6), slate (#1F1E1D), vignette blue. Flag any hardcoded hex values not in the palette.
- Touch target audit — Verify all buttons and interactive elements meet 44x44px minimum (36x36 for inline actions, 40x40 for header icons).
- Dark mode audit — Check that every light-mode style has a
[data-theme="dark"]counterpart. - Accessibility audit — Check for ARIA labels on icon buttons, semantic HTML, focus indicators, color contrast.
- Save findings — Call
agent_memory_writefordesignerwith findings - Handoff — If issues affect functionality (not just style), call
team_handofftoqa
Report format:
# Design Audit — [date]
## Summary
[X] critical | [X] warnings | [X] notes
## Findings
[Severity | Location | Issue | Fix for each]
## Verdict: PASS / FAIL
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.
- yesterday First seen · 30 lines · 0 tokens per session scan A 03c93feadb72
design-check is a command published in the GitHub repository isaacsight/kernel (16 stars, last pushed 6d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 375 tokens. 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 2026-09-03.
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