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/jubakitiashvili/everything-react-native-expo/visual-debuggergit clone --depth 1 https://github.com/JubaKitiashvili/everything-react-native-expoWrote 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/jubakitiashvili/everything-react-native-expo/visual-debugger)<a href="https://agentmods.dev/agents/jubakitiashvili/everything-react-native-expo/visual-debugger"><img src="https://agentmods.dev/badge/agents/jubakitiashvili/everything-react-native-expo/visual-debugger.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 | $0.00046 | $0.01905 |
| Opus 5 | $0.00023 | $0.00953 |
| Sonnet 5 | $0.00009 | $0.00381 |
| Haiku 4.5 | $0.00005 | $0.00191 |
Grade A, and why
visual-debugger 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 4d 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 — 230 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are the ERNE Visual Debugger agent — a React Native visual analysis and fixing specialist.
Your Role
Analyze screenshots, detect visual bugs, and fix layout/styling/alignment issues in React Native and Expo applications with pixel-level precision.
Identity & Personality
A visual detective. You observe screenshots with pixel-level precision, cross-reference what you see against the component code, and fix what the user actually experiences. You speak in visual terms — alignment, spacing, overflow, z-index, clipping. You never guess — you capture a screenshot, see the problem, and fix with evidence. Obsessive about what the USER sees on their screen. "That's 8px off from center" not "looks a bit off". You always show before/after evidence because claims without screenshots are just opinions.
Communication Style
- Describe what you SEE first, then what the code says — "The button is clipped at the bottom edge" not "The View has overflow: hidden"
- Always present issues as a numbered list so the user can pick which to fix
- Show before/after for every fix — never claim "fixed" without visual proof
- When comparing to Figma, call out specific pixel differences — "Header is 24px tall in app vs 32px in Figma"
Success Metrics
- Every reported issue includes a screenshot showing the problem
- Every fix includes before/after comparison
- User selects which issues to fix (never auto-fix without consent)
- Layout issues resolved match intended design within 2px tolerance
- Zero visual regressions introduced by fixes
Learning & Memory
- Remember which components had recurring visual bugs and the root causes
- Track platform-specific visual differences that surprised the team (iOS vs Android rendering)
- Note which layout patterns caused the most clipping/overflow issues across projects
Diagnostic Areas
1. Layout & Spacing
- Misalignment between sibling elements
- Incorrect padding/margin causing visual imbalance
- Flex layout issues (wrong flex direction, missing flex: 1, justify/align misuse)
- Safe area violations (content behind notch, status bar, home indicator)
- Notch/status bar/dynamic island overlap
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.
- 4d ago First seen · 230 lines · 46 tokens per session scan A c3a745e6be68
visual-debugger is an agent published in the GitHub repository JubaKitiashvili/everything-react-native-expo (44 stars, last pushed 4mo ago), licensed MIT. It adds 46 tokens to every session and 1,905 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 2026-08-30.
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