build-agent

build-agent is a skill for Claude Code from Rockielab/rockie-claude. It costs 57 tokens per session (593 once invoked), scanned A, original, Apache-2.0.

A command scaffold that creates a draft agent record inside the currently selected lab in an agent-building workspace.

In plain words
What is it for?
Use it with `/build-agent <name>` to create a lab-scoped draft, open its detail page, and keep access limited to users who can access that lab.
Why use it?
It provides a starting record and route for defining an agent without pretending that the agent is already built, runnable, evaluated, or deployed.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the rockie-claude plugin — 29 skills, 1 MCP server shipped together

Good fit Use it with /build-agent to create a lab-scoped draft, open its detail page, and keep access limited to users who can access that lab.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/rockielab/rockie-claude/build-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.

Any agent
npx skills add Rockielab/rockie-claude --skill build-agent
Clone the repo
git clone --depth 1 https://github.com/Rockielab/rockie-claude

Made for: Claude Code.

Or install rockie-claude, the plugin that ships this one along with the rest of its 29 skills, 1 MCP server.

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 build-agent

README.md
[![agentmods](https://agentmods.dev/badge/skills/rockielab/rockie-claude/build-agent/github.svg)](https://agentmods.dev/skills/rockielab/rockie-claude/build-agent)
Your own site
<a href="https://agentmods.dev/skills/rockielab/rockie-claude/build-agent"><img src="https://agentmods.dev/badge/skills/rockielab/rockie-claude/build-agent/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.

agentmods 80×15 button for build-agent

Your own site · 80×15
<a href="https://agentmods.dev/skills/rockielab/rockie-claude/build-agent"><img src="https://agentmods.dev/badge/skills/rockielab/rockie-claude/build-agent.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 57 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 593 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 $0.00057 $0.00593
Opus 5 $0.00028 $0.00296
Sonnet 5 $0.00011 $0.00119
Haiku 4.5 $0.00006 $0.00059

Measured 12d ago against content hash a114252ac81c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

build-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 12d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

project-harness/skills/build-agent/SKILL.md · 72 lines

What it actually says

build-agent - lab-scoped draft agent bootstrap

Use this skill when the user enters /build-agent <name> in a lab chat composer and intends to start defining a new agent inside the current lab.

A1 behavior

The A1 command is intentionally small:

  1. Read the agent name from the command text.
  2. Create a draft agent record scoped to the current lab.
  3. Open the lab-scoped agent detail route:
/labs/<lab_id>/agents/<agent_id>

The created record is a placeholder for future builder steps. Treat its config as an editable draft, not as a runnable or published agent.

Required scope

  • The command must run from an active lab context.
  • The created agent must carry the current lab id.
  • Lists and detail views must stay under that lab.
  • A user without access to the lab must not be able to see or create records for that lab.

Non-goals in A1

  • No actual agent build pipeline.
  • No run, evaluation, gauntlet, battleground, or publish workflow.
  • No observability integration.
  • No deployment orchestration.
  • No global agents surface; agent records are reached from the owning lab.

Operator response

After the draft is created, keep the response minimal: name the draft and open the lab detail route. Do not imply the agent has been built, tested, deployed, or connected to runtime infrastructure.

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. 12d ago First seen · 72 lines · 57 tokens per session scan A a114252ac81c

Subscribe to this mod's changes

build-agent is a skill published in the GitHub repository Rockielab/rockie-claude (21 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 57 tokens to every session and 593 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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