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 agentmods add skills/volomydyr/design-engineer-plugin/dev-agent-setupnpx skills add volomydyr/design-engineer-plugin --skill dev-agent-setupgit clone --depth 1 https://github.com/volomydyr/design-engineer-pluginWhat 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 | $0.00039 | $0.02601 |
| Opus 5 | $0.00019 | $0.01300 |
| Sonnet 5 | $0.00008 | $0.00520 |
| Haiku 4.5 | $0.00004 | $0.00260 |
Grade A, and why
dev-agent-setup 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 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.
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 — 224 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Agent Pipeline Setup
Why This Matters
Sub-agents run outside your main conversation in separate chats with separate token limits. This means the heavy work of analyzing context, implementing features, and auditing code happens without burning through your main conversation's 200,000 token budget.
In practice, four agents are usually enough. Starting with twelve and refining down is a common experience – maintaining too many agents is hard, and the main conversation forgets to run some of them or does it in the wrong order.
Interaction Method
If AskUserQuestion is available, use it for all prompts below.
If not, present each question as a numbered list and wait for a reply before proceeding. For multiSelect questions, accept comma-separated numbers (e.g. 1, 3). Never skip or auto-answer without explicit user consent.
Step 0: Before starting
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Announce your execution plan: Before doing anything, state what you will do in this activity: "Here's what I'm going to do: 1) assess your project type, 2) explain the proven agent pipeline pattern, 3) read memory for project context, 4) set up the agent files customized to your project, 5) configure the pipeline in your CLAUDE.md, 6) explain how iteration works." This is a commitment device – harder to skip steps you just announced.
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Conditional teaching: Ask the user if they are familiar with the agent pipeline concept – sub-agents running in separate chats with separate token limits. If yes, give a one-sentence refresher. If no, explain it in simple terms: agents are specialized AI workers that handle heavy tasks (analyzing code, implementing features, auditing quality) in their own conversations, so your main conversation stays light and responsive.
Required: ALWAYS ask the question, ALWAYS give the refresher when the user says yes. Never skip this step because the user "is a designer" or "already demonstrated familiarity earlier." Users want a memory refresh on every activity, including ones they know. Phrases like "I'll skip the explainer (you're a designer)" are forbidden — they signal the model has decided ON BEHALF OF the user that a refresher isn't needed. The user, not the model, decides what's redundant. The refresher takes one sentence; the cost is trivial; the value to a tired user mid-session is high.
What ships with it
2 files 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.
- 2d ago First seen · 224 lines · 39 tokens per session scan A 008bd245116a
dev-agent-setup is a skill published in the GitHub repository volomydyr/design-engineer-plugin (19 stars, last pushed 1mo ago), licensed MIT. It adds 39 tokens to every session and 2,601 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 2026-08-30.
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