Claude Code Agent Development
anthropics/claude-plugins-official
Explains how to write agents for Claude Code plugins: the markdown file with YAML frontmatter, trigger descriptions, model and color settings, and system prompt design.
Create specialized Claude Code agents on-the-fly. An agent skill from aiskillstore/marketplace.
Install Subagent Factory
$ npx skills add aiskillstore/marketplace --skill subagent-factory -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install aiskillstore/marketplace subagent-factory --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/aaronabuusama/subagent-factory .claude/skills/subagent-factory && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "subagent-factory" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/aaronabuusama/subagent-factory into .claude/skills/subagent-factory/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "subagent-factory", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/aiskillstore/marketplace/tree/main/skills/aaronabuusama/subagent-factoryType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add aiskillstore/marketplace --skill subagent-factory -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install aiskillstore/marketplace subagent-factory --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/aaronabuusama/subagent-factory .agents/skills/subagent-factory && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "subagent-factory" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/aaronabuusama/subagent-factory into .agents/skills/subagent-factory/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "subagent-factory", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add aiskillstore/marketplace --skill subagent-factory -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install aiskillstore/marketplace subagent-factory --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/aaronabuusama/subagent-factory .cursor/skills/subagent-factory && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "subagent-factory" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/aaronabuusama/subagent-factory into .cursor/skills/subagent-factory/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "subagent-factory", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/aiskillstore/marketplace.git --path skills/aaronabuusama/subagent-factory--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add aiskillstore/marketplace --skill subagent-factory -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install aiskillstore/marketplace subagent-factory --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/aaronabuusama/subagent-factory .gemini/skills/subagent-factory && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "subagent-factory" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/aaronabuusama/subagent-factory into .gemini/skills/subagent-factory/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "subagent-factory", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install aiskillstore/marketplace subagent-factoryInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add aiskillstore/marketplace --skill subagent-factory -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/aaronabuusama/subagent-factory .github/skills/subagent-factory && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "subagent-factory" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/aaronabuusama/subagent-factory into .github/skills/subagent-factory/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "subagent-factory", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add aiskillstore/marketplace --skill subagent-factory -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install aiskillstore/marketplace subagent-factory --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/aiskillstore/marketplace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/aaronabuusama/subagent-factory .opencode/skills/subagent-factory && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "subagent-factory" agent skill from https://github.com/aiskillstore/marketplace/tree/main/skills/aaronabuusama/subagent-factory into .opencode/skills/subagent-factory/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "subagent-factory", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
subagent-factory- GitHub stars
- 430
- Token cost
- ~1.7k tokens
- SKILL.md length
- 614 words
- Files
- 14 (incl. references)
- Skills in repo
- 1,044
- Repo updated
- First seen
- Licence
- None found
At a glance
Create specialized Claude Code agents on-the-fly. An agent skill from aiskillstore/marketplace.
- Works in 5 steps: Single Responsibility → Right Altitude → Explicit Tool Scoping → …
- User says create agent
- SKILL.md covers When to Activate This Skill, Two Creation Modes, Quick Reference: Agent Schema and Core Principles, plus 5 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Subagent Factory is an agent skill from aiskillstore/marketplace. Create specialized Claude Code agents on-the-fly. Guides through agent definition file creation with proper frontmatter, effective prompts, and tool scoping. USE WHEN user says 'create agent', 'new subagent', 'make an agent for', 'build agent', 'spawn agent', or wants to define custom agents for specific tasks.
Its SKILL.md is about 1.7k tokens, which your agent loads only when the skill is triggered. The skill folder holds 16 other files, including reference files (for example `references/advanced-features.md`, `references/agent-schema.md` and `references/prompt-patterns.md`).
It sits in Agent Workflows, covering Subagents, Building AI agents and Prompt engineering. The repository describes itself as: Security-audited skills for Claude, Codex & Claude Code. One-click install, quality verified.
When your agent uses it
- User says create agent
- Make an agent for
- Wants to define custom agents for specific tasks
Example prompts
- “create agent”
- “new subagent”
- “make an agent for”
- “/subagent-factory”
Workflow steps
5 steps, taken from the step headings in SKILL.md.
- Single Responsibility
- Right Altitude
- Explicit Tool Scoping
- Progressive Examples
- Actionable Instructions
What it can do on your machine
Read from SKILL.md and the folder at commit 755bc35. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are yaml and markdown).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Subagent Factory loads about 1.7k tokens when it runs, and up to ~19k if it reads all its reference files. Until then it costs about 82 tokens; SKILL.md has 614 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 614 words (~1,715 tokens).
“Factory for creating specialized Claude Code agents. Generates agent definition files with proper configuration, effective system prompts, and appropriate tool access.”
- name
- subagent-factory
Files
SKILL.md and 13 other files (references) in skills/aaronabuusama/subagent-factory of aiskillstore/marketplace.
- SKILL.md
- references/advanced-features.md
- references/agent-schema.md
- references/prompt-patterns.md
- references/task-tool-reference.md
- research/MANIFEST.md
- research/configuration.md
- research/existing-patterns.md
- research/prompt-engineering.md
- research/slash-commands.md
- research/task-tool.md
- skill-report.json
- workflows/interview-create.md
- workflows/quick-create.md
Open the folder on GitHubat commit 755bc35
Compare with similar skills
Subagent Factory next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Subagent Factory this skillaiskillstore/marketplace | 430 | — | ~1.7k | Automated safety check: Pass | None | |
| Claude Code Agent Developmentanthropics/claude-plugins-official | 38k | 7 repos | ~2.8k | Automated safety check: Pass | Apache-2.0 | |
| Create Agentvectorize-io/hindsight | 47k | — | ~1.1k | Automated safety check: Pass | MIT | |
| Subagent CreatorgreatSumini/cc-system | 438 | — | ~958 | Automated safety check: Pass | MIT | |
| Deep Agentslangchain-ai/docs | 426 | — | ~1.1k | Automated safety check: Pass | MIT | |
| Create AgentApocrathia/home-assistant-config | 179 | — | ~1.1k | Automated safety check: Pass | None |
Similar skills
- Official
Create Agent
vectorize-io/hindsight
Create a new Hindsight-powered subagent with long-term memory.
Subagent Creator
greatSumini/cc-system
Create specialized Claude Code sub-agents with custom system prompts and tool configurations.
- Official
Deep Agents
langchain-ai/docs
Build batteries-included agents with planning, context management, subagent delegation, and sandboxed execution.
Create Agent
Apocrathia/home-assistant-config
Create a new agent persona under .agents/agents/. An agent skill from Apocrathia/home-assistant-config.
Prompt Optimizer
Cranot/roam-code
Optimize a vague subagent brief into a structured Agent task brief carrying falsifier, invariant, source-citation rule, and concrete-noun anchors.
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Process JSON with jq and YAML/TOML with yq. An agent skill from aiskillstore/marketplace.
Doc Scanner
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Scans for project documentation files (AGENTS.md, CLAUDE.md, GEMINI.md, COPILOT.md, CURSOR.md, WARP.md, and 15+ other formats) and synthesizes guidance.
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Modern file and content search using fd, ripgrep (rg), and fzf.
Find Replace
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Modern find-and-replace using sd (simpler than sed) and batch replacement patterns.
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Related
Categories
Questions about Subagent Factory
What does Subagent Factory do?
Create specialized Claude Code agents on-the-fly. An agent skill from aiskillstore/marketplace. Subagent Factory is an agent skill from aiskillstore/marketplace. Create specialized Claude Code agents on-the-fly.
When should I use Subagent Factory?
Subagent Factory fits situations like: user says create agent; make an agent for; wants to define custom agents for specific tasks.
How do I install Subagent Factory in Claude Code?
Run `npx skills add aiskillstore/marketplace --skill subagent-factory -a claude-code`. Or copy the skill folder (skills/aaronabuusama/subagent-factory in aiskillstore/marketplace) into .claude/skills/subagent-factory in your project. Claude Code loads it when a task matches its description.
How do I install Subagent Factory in Codex?
Run `npx skills add aiskillstore/marketplace --skill subagent-factory -a codex`. Or copy the skill folder (skills/aaronabuusama/subagent-factory in aiskillstore/marketplace) into .agents/skills/subagent-factory in your project. Codex loads it when a task matches its description.
Can I use Subagent Factory in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add aiskillstore/marketplace --skill subagent-factory -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/subagent-factory, .gemini/skills/subagent-factory, .github/skills/subagent-factory and .opencode/skills/subagent-factory in your project.
What does Subagent Factory need to run?
SKILL.md names no scripts, command-line tools or credentials: Subagent Factory is instructions for the agent only.
Does Subagent Factory access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Subagent Factory safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Subagent Factory use?
No licence was found for Subagent Factory or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Subagent Factory use?
About 1.7k tokens (SKILL.md is roughly 6.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 17k tokens, read only when the agent opens those files.
What are the alternatives to Subagent Factory?
Skills that share tags, products or a category with Subagent Factory: Claude Code Agent Development (anthropics/claude-plugins-official, 38k stars), Create Agent (vectorize-io/hindsight, 47k stars), Subagent Creator (greatSumini/cc-system, 438 stars) and Deep Agents (langchain-ai/docs, 426 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Subagent Factory?
aiskillstore (a GitHub organization) maintains it in aiskillstore/marketplace, which has 430 GitHub stars. The repository holds 1,044 skills in this directory. The repository was last updated on October 9, 2026.
Source: aiskillstore/marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.