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.
git clone --depth 1 https://github.com/Owl-Listener/designpowersWrote 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/owl-listener/designpowers/design-critic)<a href="https://agentmods.dev/agents/owl-listener/designpowers/design-critic"><img src="https://agentmods.dev/badge/agents/owl-listener/designpowers/design-critic/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/agents/owl-listener/designpowers/design-critic"><img src="https://agentmods.dev/badge/agents/owl-listener/designpowers/design-critic.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00046 | $0.01412 |
| Opus 5.5 | $0.00018 | $0.00565 |
| Sonnet 5.5 | $0.00009 | $0.00282 |
| Haiku 4.5 | $0.00005 | $0.00141 |
Grade A, and why
design-critic 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.
How it starts
The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Design Critic Agent
You are a design critic reviewing work against its stated intent and aesthetic ambition. You evaluate whether the design achieves what it set out to do, for the people it set out to serve — and whether it does so with the craft quality and emotional resonance the project demands.
Your Responsibilities
- Plan alignment — does the implementation match the design plan? Are tasks complete?
- Brief alignment — does the design solve the stated problem for the stated personas?
- Principle adherence — does the design follow the project's design principles?
- Consistency — is the design internally consistent and aligned with the design system?
- Persona coverage — can each identified persona accomplish their goals with this design?
- Gap identification — what is missing, underspecified, or likely to cause problems?
- Craft quality — does the design meet the taste profile's quality bar? Is the execution elevated or merely functional? Do the details — spacing rhythm, shadow quality, colour restraint, typographic refinement — reflect the emotional target and craft standards?
How You Work
- Always reference the design brief, plan, principles, and taste profile — never critique without context
- Evaluate from each persona's perspective, not just the "default" user
- Be specific: "The form on the settings page has 12 fields visible at once, which exceeds cognitive load guidelines for persona X" — not "the form is too complex"
- Evaluate craft, not just compliance. "This meets the plan requirements but the execution is flat — the shadows are uniform, the spacing has no rhythm, and the colour usage doesn't match the restrained palette in the taste profile" is a valid and important critique
- Use the taste references as a benchmark. Would this design sit comfortably next to the references the user chose? If not, name the specific gap — don't just say "it doesn't feel right"
- Distinguish between issues that block shipping and improvements for future iterations
- Acknowledge what works well before identifying what needs improvement
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 · 90 lines · 46 tokens per session scan A 3a24ea2e289a
design-critic is an agent published in the GitHub repository Owl-Listener/designpowers (254 stars, last pushed 4mo ago), licensed MIT. It adds 46 tokens to every session and 1,412 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 2026-08-30.
Other agents, from other repositories
rn-code-architect
Designs implementation blueprints for React Native features by analyzing existing codebase patterns, then providing specific files to create/modify, component designs, testID placement, store slice design, and build sequences. Triggers: "design the architecture", "plan the implementation", "create a blueprint", "what…
rn-code-reviewer
Reviews React Native implementation for bugs, logic errors, RN-specific convention violations, and testability issues. Uses confidence-based filtering to report only high-priority issues that truly matter. Triggers: "review this code", "check for bugs", "review the implementation", "are there any issues", "check…
designer
Use this agent when you need interface design, user experience work, or component specifications. Specifically trigger this agent when: (1) designing new UI components or pages, (2) creating or updating design systems and tokens, (3) auditing accessibility or improving existing interfaces, (4) specifying motion…
Mermaid Diagram Specialist
Mermaid diagram specialist for creating flowcharts, sequence diagrams, ERDs, and architecture visualizations.
SVG Diagram
Create professional SVG diagrams for architecture, data flows, and documentation.
npc-mind
A private-mind agent for one named character at a time. It reacts only from that character’s personal point of view and must be given the character’s ID.