agent-builder SKILL.md skillA
agent-builder from mathews-tom/armory is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add mathews-tom/armory/agent-builder@v1.1.1Pins v1.1.1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- mathews-tom/armory
- Path
skills/agent-builder/SKILL.md- Versions recorded
- 5
- Latest version
- v1.1.1, committed Apr 11, 2026
- First version recorded
- Mar 27, 2026
- Size
- 6,682 bytes
- Repository stars
- 334
- License
- MIT
Build AI agents and automate Claude Code programmatically via the Claude Agent SDK and headless CLI mode. Covers Python SDK, claude -p, SDK MCP servers, hooks, sessions. Triggers on: "build an agent", "agent SDK", "headless mode", "automate Claude", "programmatic agent".
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Agent Builder - Claude SDK & CLI Expert **Triggers:** - "build agent", "create agent", "agent sdk", "claude sdk" - "headless mode", "programmatic", "cli command" - "claude -p", "query programmatically" - "custom tools", "mcp server", "sdk mcp" - "claude code api", "agent options" --- ## Prefer Claude Code Headless Mode This skill covers Claude Code's headless mode and the Agent SDK — not the raw Anthropic API. ```text Preferred: Claude Code CLI headless mode (claude -p) Preferred: Claude Agent SDK (wraps Claude Code CLI) Avoid: Raw Anthropic API (anthropic.Anthropic()) Avoid: Direct API calls with API keys ``` **Why this matters:** - The Agent SDK wraps the Claude Code CLI — it does not use the raw Anthropic API - Authentication comes from existing `~/.claude/` config — no API keys needed - All settings, MCP servers, and configuration inherit from your Claude Code setup - You get Claude Code's full agent loop, tools, and context management **Rule:** If code uses `anthropic.Anthropic()`, `anthropic.messages.create()`, or requires `ANTHROPIC_API_KEY`, that is the wrong approach. Use `claude -p` or `claude_agent_sdk` instead. --- ## Core Capabilities …
Read the whole file at its exact version.
How to install
mdr add mathews-tom/armory/agent-builder@sha256:470f6a4ed6bf1f6dThe line at the top of this page pins the label v1.1.1, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_ts7xt7jjd56n4jbe)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Mar 27, 2026 and Apr 11, 2026, about one every 4 days. Its first recorded version is graded C and its latest A.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.1.1 latest | 2026-04-11 | 8f5faae | 6,682 B | A | view · diff |
| v1.1.1 | 2026-04-11 | 0aa221a | 20,799 B | B | view · diff |
| v1.1.1 | 2026-04-09 | 1cc63e5 | 21,153 B | C | view · diff |
| v1.1.1 | 2026-04-07 | b03849d | 21,138 B | C | view · diff |
| v1.1.0 | 2026-03-27 | d46cf2e | 21,138 B | C | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6682 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
mathews-tom/armory · 334 stars · license MIT · pushed 2026-10-20 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ts7xt7jjd56n4jbe GET https://markdownregistry.com/api/v1/resolve?ref=mathews-tom/armory/agent-builder GET https://markdownregistry.com/api/v1/blob/470f6a4ed6bf1f6dc47a47399fd759352c14a1475d68c7a8b6608a3db9442ac9
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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