designer

A product-design agent for user experience, interfaces, visual design, prototypes, and design systems.

In plain words
What is it for?
Use it for interface design, user research, interaction planning, prototypes, and design strategy.
Why use it?
It helps plan how software should look, work, and respond to users.

Agent

Install

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.

agentmods
npx agentmods add agents/danielmiessler/paiplugin/designer
Clone the repo
git clone --depth 1 https://github.com/danielmiessler/PAIPlugin
Per session 62 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,274 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 2 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00062 $0.01274
Opus 5 $0.00031 $0.00637
Sonnet 5 $0.00012 $0.00255
Haiku 4.5 $0.00006 $0.00127

Measured 2d ago against content hash 4fec9602f77c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

designer scanned grade B with 2 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 2d 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.

Sends data to an external URLmediumData exfiltration

A POST to an outside endpoint may be telemetry or may be exfiltration; either way the mod talks to somewhere, and you should know where.

curl -X POST http://localhost:8888/notify -H "Content-Type: application/json" -d '{"message":"Designer completed [YOUR SPECIFIC TASK]","rate":240,"voice_enabled":true}'

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -X POST http://localhost:8888/notify -H "Content-Type: application/json" -d '{"message":"Designer completed [YOUR SPECIFIC TASK]","rate":240,"voice_enabled":true}'
Origin

Copies of this mod

1 near-identical copy found in the catalogue:

  • miriam — 89% identical, 36 lines differ
agents/designer.md · 133 lines

How it starts

The opening of the file, as written. The whole thing — 133 lines — stays where its author put it; the contents beside it link to each section on GitHub.

🚨🚨🚨 MANDATORY FIRST ACTION - DO THIS IMMEDIATELY 🚨🚨🚨

SESSION STARTUP REQUIREMENT (NON-NEGOTIABLE)

BEFORE DOING OR SAYING ANYTHING, YOU MUST:

  1. LOAD CONTEXT BOOTLOADER FILES!

    • read ~/.claude/context/CLAUDE.md - The complete context system documentation
    • read ~/.claude/context/tools/CLAUDE.md - The tools you have available

DO NOT LIE ABOUT LOADING THESE FILES. ACTUALLY LOAD THEe FIRST.

OUTPUT UPON SUCCESS:

"UFC Hydration Bootloading Complete ✅"

  1. ONLY AFTER ACTUALLY READING ALL FILES, then acknowledge: "✅ Context system loaded - I understand the context architecture. ✅ Tools context loaded - I know my commands and capabilities. ✅ Design framework loaded - I'm ready for creating exceptional design solutions."

DO NOT LIE ABOUT LOADING THESE FILES. ACTUALLY LOAD THEM FIRST.

CRITICAL VOICE SYSTEM REQUIREMENTS

🎤 MANDATORY VOICE ANNOUNCEMENT AFTER EVERY RESPONSE:

After completing ANY response, you MUST immediately use the Bash tool to announce your completion:

curl -X POST http://localhost:8888/notify -H "Content-Type: application/json" -d '{"message":"Designer completed [YOUR SPECIFIC TASK]","rate":240,"voice_enabled":true}'

CRITICAL RULES:

  • Replace [YOUR SPECIFIC TASK] with exactly what you accomplished
  • Be specific: "user flow optimization for checkout" NOT "design task"
  • Use this command AFTER every single response
  • This is NOT optional - it's required for voice system functionality

IDENTITY

You are an elite design review specialist with deep expertise in user experience, visual design, accessibility, and front-end implementation. You conduct world-class design reviews following the rigorous standards of top Silicon Valley companies like Stripe, Airbnb, and Linear. Your Core Methodology: You strictly adhere to the "Live Environment First" principle - always assessing the interactive experience before diving into static analysis or code. You prioritize the actual user experience over theoretical perfection.

Read the full file on GitHub · 133 lines

Changes

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.

  1. 2d ago First seen · 133 lines · 62 tokens per session scan B 4fec9602f77c

Subscribe to this mod's changes

designer is an agent published in the GitHub repository danielmiessler/PAIPlugin (56 stars, last pushed 9mo ago), licensed MIT. It adds 62 tokens to every session and 1,274 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it B with 2 findings (sends data to an external url, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

Other agents, from other repositories

Demonstrate

Agent for demonstrating VS Code features.

microsoft/vscode · 10 tokens

playwright-test-generator

Use this agent when you need to create automated browser tests using Playwright Examples: Context: User wants to generate a test for the test plan item.

microsoft/playwright · 151 tokens

.NET-Notebook-Migration-Agent

Expert .NET and documentation transformation agent that migrates Polyglot Jupyter notebooks into clean Markdown and companion .NET sample code.

microsoft/ai-agents-for-beginners · 33 tokens

AVM Owner Triage

Triage open GitHub issues across the Azure Verified Modules (AVM) repos an owner maintains. Splits the backlog into a Copilot-delegatable pile and a human pile, produces a report with a delegation ratio, and never comments or assigns without explicit user approval.

github/awesome-copilot · 61 tokens

Ultimate Transparent Thinking Beast Mode

Agent "Ultimate Transparent Thinking Beast Mode" from github/awesome-copilot, covering quantum cognitive architecture, phase 2: adversarial intelligence & red-team analysis, phase 3: implementation & iterative refinement and phase 4: comprehensive verification & completion.

github/awesome-copilot · 11 tokens

code-reviewer

Performs thorough code reviews for the Notebooks in the Cookbook repo, focusing on Python/Jupyter best practices, and project-specific standards. Use this agent proactively after writing any significant code changes, especially when modifying notebooks, Github Actions, and scripts.

anthropics/claude-cookbooks · 52 tokens