Owl-Listener/designer-skills is a collection of AI-agent skills, commands, and plugins for design work, covering research, design systems, interfaces, interaction, and delivery. Designers and developers use it inside coding assistants to guide design tasks, and the catalogue entries represent selected parts of that larger collection.
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 skills add Owl-Listener/designer-skills --skill error-handling-uxgit clone --depth 1 https://github.com/Owl-Listener/designer-skillsWrote 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/skills/owl-listener/designer-skills/error-handling-ux)<a href="https://agentmods.dev/skills/owl-listener/designer-skills/error-handling-ux"><img src="https://agentmods.dev/badge/skills/owl-listener/designer-skills/error-handling-ux/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/owl-listener/designer-skills/error-handling-ux"><img src="https://agentmods.dev/badge/skills/owl-listener/designer-skills/error-handling-ux.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
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 5.1 | $0.00046 | $0.00428 |
| Opus 5.5 | $0.00018 | $0.00171 |
| Sonnet 5.5 | $0.00009 | $0.00086 |
| Haiku 4.5 | $0.00005 | $0.00043 |
Grade A, and why
error-handling-ux 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 1mo 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- error-handling-ux — 88% identical, 2 lines differ
What it actually says
Error Handling UX
You are an expert in designing error experiences that prevent, detect, and help users recover from errors.
What You Do
You design error handling that minimizes frustration and helps users succeed.
Error Handling Hierarchy
1. Prevention
- Inline validation before submission
- Smart defaults and suggestions
- Confirmation dialogs for destructive actions
- Constraint-based inputs (date pickers, dropdowns)
- Auto-save to prevent data loss
2. Detection
- Real-time field validation
- Form-level validation on submit
- Network error detection
- Timeout handling
- Permission and authentication checks
3. Communication
- Clear, human language (not error codes)
- Explain what happened and why
- Tell the user what to do next
- Place error messages near the source
- Use appropriate severity (error, warning, info)
4. Recovery
- Preserve user input (don't clear forms on error)
- Offer retry for transient failures
- Provide alternative paths
- Auto-retry with backoff for network errors
- Undo for accidental actions
Error Message Format
- What happened: Brief, clear description
- Why: Context if helpful
- What to do: Specific action to resolve
Error States by Context
- Forms: Inline per-field + summary at top
- Pages: Full-page error with retry/back options
- Network: Toast/banner with retry
- Empty results: Helpful empty state with suggestions
- Permissions: Explain what access is needed and how to get it
Best Practices
- Never blame the user
- Be specific (not just 'Something went wrong')
- Maintain the user's context and data
- Log errors for debugging
- Test error paths as thoroughly as happy paths
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.
- 1mo ago First seen · 50 lines · 46 tokens per session scan A b0bc3af42aa1
error-handling-ux is a skill published in the GitHub repository Owl-Listener/designer-skills (3,116 stars, last pushed 1mo ago), licensed MIT. It adds 46 tokens to every session and 428 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-09-03.
Other skills, from other repositories
ui-review
Review UI code for StyleSeed design-system compliance, accessibility, mobile ergonomics, spacing discipline, and implementation quality.
design-craft
Design or substantially improve user-facing interfaces with a product-specific visual direction, content hierarchy, and rendered critique. Use for new screens, landing pages, redesigns, typography/layout work, or UI that feels generic or AI-generated. For small fixes, preserve the existing design without starting a…
design-critique
Use this skill to audit an interface that already exists and say precisely why it looks generated, templated, or unfinished — a scored rubric across composition, typography, color, states, accessibility and copy, ending in a ranked fix list. Triggers: user says "review the design", "critique this UI", "why does this…
design-reference-read
Read a reference website or screenshot the way a designer does — by measuring it. Produces a dated "design DNA" record (color roles, type scale and ratio, spacing unit, radii, elevation, motion, section rhythm per viewport, component geometry, declared tokens) with measured and inferred values kept apart, names the…
anti-slop-frontend
A mechanical, countable anti-slop checklist for AI-generated frontend. Catches the specific signatures an undirected model defaults to: AI-purple glows, Inter-everywhere, em-dashes, div-based fake screenshots, eyebrow-on-every-section, beige+brass "premium" palettes, generic Jane Doe / Acme data. Advisory layer that…
design-to-code
Implement a supplied Figma design, screenshot, live reference site or design specification as a working interface, and prove the match with measured fidelity scores per axis (color, type, space, shape, layout, motion) instead of eyeballing. Use when matching a reference or handling design handoff; preserve its layout…