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 rtazima/claude-proj-blueprint --skill claude-design-handoffgit clone --depth 1 https://github.com/rtazima/claude-proj-blueprintWrote 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/rtazima/claude-proj-blueprint/claude-design-handoff)<a href="https://agentmods.dev/skills/rtazima/claude-proj-blueprint/claude-design-handoff"><img src="https://agentmods.dev/badge/skills/rtazima/claude-proj-blueprint/claude-design-handoff/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/rtazima/claude-proj-blueprint/claude-design-handoff"><img src="https://agentmods.dev/badge/skills/rtazima/claude-proj-blueprint/claude-design-handoff.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 | $0.00069 | $0.01652 |
| Opus 5 | $0.00034 | $0.00826 |
| Sonnet 5 | $0.00014 | $0.00330 |
| Haiku 4.5 | $0.00007 | $0.00165 |
Grade A, and why
claude-design-handoff 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 11d 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 — 124 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Claude Design Handoff — PRD + PROMPT.md reconciliation
Claude Design is Anthropic Labs' design tool. The "Send to Claude Code" button
produces a PROMPT.md bundle that describes: stack, conventions, screens to build,
design tokens, and components. This skill reconciles that handoff with the
project's PRD and CLAUDE.md conventions before code generation.
When this skill activates
/implementdetectsdocs/design/<slug>-PROMPT.mdnext to the target PRD- PRD contains a reference like
Design: docs/design/feat-x-PROMPT.mdor a Claude Design URL - User explicitly mentions Claude Design, handoff bundle, or PROMPT.md
Source-of-truth hierarchy (conflict resolution)
When PRD, PROMPT.md, and CLAUDE.md disagree, precedence is strict:
- PRD (
docs/product/*.md) — business contract. Wins on: scope, acceptance criteria, non-goals, metrics, personas. - CLAUDE.md — project conventions. Wins on: language, framework, package manager, lint/format rules, commit style, folder structure.
- PROMPT.md (Claude Design) — visual/UX contract. Wins on: screens to build, components, design tokens, interaction patterns, copy.
- Generated code — last.
If PROMPT.md suggests a stack that contradicts CLAUDE.md, stop and ask the user. Do not silently adopt.
Workflow
-
Locate the handoff bundle
- Look for
docs/design/<prd-slug>-PROMPT.md(same basename as PRD) - Fall back to any
docs/design/*PROMPT.mdmentioned in the PRD body - If none found, deactivate and let
frontend-agentor Figma flow handle it
- Look for
-
Parse the handoff — extract, in order:
- Stack hints (framework, component library, styling approach)
- Design tokens (colors, typography, spacing, radii, shadows)
- Screens list (names, routes, primary actions)
- Components list (name + variants + states)
- Copy and microcopy
- Any "IMPORTANT" or "NEVER" directives from Claude Design
-
Reconcile against CLAUDE.md
- Compare stack hints to declared stack. Log each divergence.
- Compare tokens to
docs/specs/design-system/README.md. If empty, PROMPT.md becomes the seed. If filled, CLAUDE.md tokens win and PROMPT.md is treated as suggestion. - Compare component library to project's. If different, stop.
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.
- 11d ago First seen · 124 lines · 69 tokens per session scan A 5a29deafacb2
claude-design-handoff is a skill published in the GitHub repository rtazima/claude-proj-blueprint (20 stars, last pushed 3mo ago), licensed MIT. It adds 69 tokens to every session and 1,652 once invoked, about $0.0003 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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