OPOS: Skill for Claude Code

.claude/skills/design-agent/SKILL.md

design-agent is a skill for Claude Code from Koroqe/OPOS. It costs 39 tokens per session (3,361 once invoked), scanned A, original, MIT.

A guided process for designing a new agent role file, which defines an AI agent’s responsibilities, decisions, and limits.

In plain words
What is it for?
Use it to design roles such as a release coordinator or marketing analyst, or to turn a backlog item into an agent role.
Why use it?
It helps turn a rough request for a new agent into a clear proposal and keeps a person in control before the file is created.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: reads .claude/ paths; mentions CLAUDE.md.

This is Koroqe/OPOS's own configuration. It tells Claude Code how to work on OPOS itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything OPOS configures →

Reuse

Borrowing it

Nothing to install: this file belongs to Koroqe/OPOS. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/Koroqe/OPOS/main/.claude/skills/design-agent/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/Koroqe/OPOS

Made for: Claude Code.

Wrote 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.

agentmods badge for design-agent

README.md
[![agentmods](https://agentmods.dev/badge/skills/koroqe/opos/design-agent.svg)](https://agentmods.dev/skills/koroqe/opos/design-agent)
Your own site
<a href="https://agentmods.dev/skills/koroqe/opos/design-agent"><img src="https://agentmods.dev/badge/skills/koroqe/opos/design-agent.svg" alt="Measured on agentmods" height="20"></a>
Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,361 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 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 5.1 $0.00039 $0.03361
Opus 5 $0.00019 $0.01681
Sonnet 5 $0.00008 $0.00672
Haiku 4.5 $0.00004 $0.00336

Measured 2d ago against content hash 1427ce1907ce, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

design-agent 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.

.claude/skills/design-agent/SKILL.md · 128 lines

How it starts

The opening of the file, as written. The whole thing — 128 lines — stays where its author put it; the contents beside it link to each section on GitHub.

design-agent

When to use

Invoke when a new agent role needs to exist. Two entry points:

  1. Fresh role description — the user says "we need an agent for X" (e.g. "a release coordinator", "a marketing analyst").
  2. Formalize a backlog item — the user points at a BACKLOG-ITEM.md whose intended_target is an agent.

Also invoked from design-process when a process design surfaces a need for an agent role that doesn't yet exist (see design-process/SKILL.md Failure modes).

The skill is INTERACTIVE: it produces a proposal, iterates with the user, and only writes the agent file on explicit user approval. The human is the approval gate.

Inputs

  • role_description — free-text description of the new agent's responsibilities + scope + decisions it should make + what it does NOT do. Required if no backlog_item_path is supplied.
  • backlog_item_path — OPTIONAL. Path to a BACKLOG-ITEM.md whose intended_target is an agent. When supplied, the item's frontmatter seeds the proposal; the item is flipped to state: designed with a designed_as: <new-agent-path> field at the end.

Registry pass (v0.13)

When drafting the tools: ladder AND the role's external-access needs: read company/resources/REGISTRY.md. Grants derive from DECLARED resources, never invention — a role needing an access no entry covers gets a "requires acquisition" line in the proposal (naming the /acquire-resource request to file) instead of a fabricated tool. If the role's core duty depends on a per-machine resource (machines: bound), say so in the proposal so the human knows where the agent can actually operate.

Steps

  1. Lessons pass + provenance duty (v0.11, applies to every run). Before designing: read the company's kind: lesson backlog items (glob **/backlog/*.md, filter frontmatter kind: lesson) whose mistake_class/root_cause_target matches this skill or the artifact class it produces, plus this skill's own history/ entries with open proposed_deltas; apply every matching constraint to the draft and LIST the applied lessons in the proposal so the human sees the loop working. When writing the artifact: stamp provenance — frontmatter derived_from: <template>@<framework-version> + designed_by: <this-skill>@<its version> (framework version = .copier-answers.yml _commit; in the framework repo itself use the current release tag); charter files get the equivalent HTML comment stamp at file end.

Read the full file on GitHub · 128 lines

Files

What ships with it

3 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.

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 Changed 1427ce1907ce
  2. 6d ago First seen · 128 lines · 39 tokens per session scan A 62f8818dd1be

Subscribe to this mod's changes

design-agent is a skill published in the GitHub repository Koroqe/OPOS (2 stars, last pushed 4d ago), licensed MIT. It adds 39 tokens to every session and 3,361 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 2026-08-31.

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