OpenDesign is an open-source, local-first desktop app that lets coding agents create prototypes, dashboards, slide decks, images, video, and design systems as exportable files. It is used by people working with agent runtimes such as Claude Code, Codex, Cursor, and DeepSeek Harness. The catalogue add-ons extend the OpenDesign workflow with skills, instructions, commands, and plugins.
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 nexu-io/open-design --skill rewrite-plangit clone --depth 1 https://github.com/nexu-io/open-designWrote 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/nexu-io/open-design/rewrite-plan)<a href="https://agentmods.dev/skills/nexu-io/open-design/rewrite-plan"><img src="https://agentmods.dev/badge/skills/nexu-io/open-design/rewrite-plan.svg" alt="Measured on agentmods" height="20"></a>- 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 | $0.00035 | $0.00500 |
| Opus 5 | $0.00017 | $0.00250 |
| Sonnet 5 | $0.00007 | $0.00100 |
| Haiku 4.5 | $0.00003 | $0.00050 |
Grade A, and why
rewrite-plan 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- rewrite-plan — 89% identical, 5 lines differ
What it actually says
Rewrite plan
Spec §20.3 / §21.3.2: scenario 4 (design → deliverable production code) requires a contract-shaped rewrite plan before the agent starts editing files. The plan is the audit trail every subsequent stage references; without it the patch path slides into "refactor everything that looks wrong" and the build breaks in unreviewable ways.
Inputs
code/index.jsonfromcode-import.token-map/*.jsonfromtoken-map.- The active design system DESIGN.md (already in prompt).
- The user's tune intent (typically a short brief).
Output
project-cwd/
└── plan/
├── plan.md # human-readable narrative
├── ownership.json # { file: '...', layer: 'leaf' | 'shared' | 'route' | 'shell' }
├── steps.json # ordered { id, files[], rationale, risk: 'low' | 'medium' | 'high' }[]
└── meta.json # { generatedAt, atomDigest, tokenMapDigest }
steps.json is the input patch-edit reads one entry per
iteration. ownership.json is the source of truth for "which
files belong to a single component vs. shared infrastructure";
patch-edit refuses to touch a shell-tier file unless the
matching step has risk: 'high' and the user explicitly confirmed.
Convergence
The atom completes when plan.md is non-empty AND steps.json
contains at least one step.
Anti-patterns the prompt fragment forbids
- Plans that include "rewrite the whole component library" as a single step. Break into per-component steps.
- Plans that don't classify ownership.
- Plans that don't list a
build-teststep at the end.
Status
Implemented by the daemon runner in
apps/daemon/src/plugins/atoms/rewrite-plan.ts. It classifies ownership and
writes plan.md, steps.json, and ownership.json.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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 · 59 lines · 35 tokens per session scan A dd344a48ef95
rewrite-plan is a skill published in the GitHub repository nexu-io/open-design (94,754 stars, last pushed today), licensed Apache-2.0. It adds 35 tokens to every session and 500 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 2026-09-03.
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