LexGuard MCP Developer Guide
SeoNaRu/lexguard-mcp
Developer guide for the LexGuard Korean law MCP server: layer rules, adding tools and repositories, JSON-RPC responses, law API handling, answer rules and tests.
Builds ADK (Agent Development Kit) Python agents: LLM agents with tools, graph workflows of function and agent nodes, conditional routing, fan-out and join, schema-validated delegation between…
Install Adk Agent Builder
$ npx skills add google/adk-python --skill adk-agent-builder -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install google/adk-python adk-agent-builder --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/google/adk-python.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/adk-agent-builder .claude/skills/adk-agent-builder && 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 "adk-agent-builder" agent skill from https://github.com/google/adk-python/tree/main/.agents/skills/adk-agent-builder into .claude/skills/adk-agent-builder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "adk-agent-builder", 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/google/adk-python/tree/main/.agents/skills/adk-agent-builderType 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 google/adk-python --skill adk-agent-builder -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install google/adk-python adk-agent-builder --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/google/adk-python.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/adk-agent-builder .agents/skills/adk-agent-builder && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "adk-agent-builder" agent skill from https://github.com/google/adk-python/tree/main/.agents/skills/adk-agent-builder into .agents/skills/adk-agent-builder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "adk-agent-builder", 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 google/adk-python --skill adk-agent-builder -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install google/adk-python adk-agent-builder --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/google/adk-python.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/adk-agent-builder .cursor/skills/adk-agent-builder && 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 "adk-agent-builder" agent skill from https://github.com/google/adk-python/tree/main/.agents/skills/adk-agent-builder into .cursor/skills/adk-agent-builder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "adk-agent-builder", 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/google/adk-python.git --path .agents/skills/adk-agent-builder--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 google/adk-python --skill adk-agent-builder -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install google/adk-python adk-agent-builder --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/google/adk-python.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/adk-agent-builder .gemini/skills/adk-agent-builder && 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 "adk-agent-builder" agent skill from https://github.com/google/adk-python/tree/main/.agents/skills/adk-agent-builder into .gemini/skills/adk-agent-builder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "adk-agent-builder", 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 google/adk-python adk-agent-builderInstalls 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 google/adk-python --skill adk-agent-builder -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/google/adk-python.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/adk-agent-builder .github/skills/adk-agent-builder && 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 "adk-agent-builder" agent skill from https://github.com/google/adk-python/tree/main/.agents/skills/adk-agent-builder into .github/skills/adk-agent-builder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "adk-agent-builder", 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 google/adk-python --skill adk-agent-builder -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install google/adk-python adk-agent-builder --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/google/adk-python.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/adk-agent-builder .opencode/skills/adk-agent-builder && 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 "adk-agent-builder" agent skill from https://github.com/google/adk-python/tree/main/.agents/skills/adk-agent-builder into .opencode/skills/adk-agent-builder/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "adk-agent-builder", 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
adk-agent-builder- GitHub stars
- 22k
- Token cost
- ~879 tokens
- SKILL.md length
- 233 words
- Files
- 18 (incl. references)
- Skills in repo
- 13
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
Builds ADK (Agent Development Kit) Python agents: LLM agents with tools, graph workflows of function and agent nodes, conditional routing, fan-out and join, schema-validated delegation between…
- Asked to create an agent
- SKILL.md covers Start here, Building blocks, Graph orchestration and Runtime and verification
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Add a tool to one
What it does
Adk Agent Builder is an agent skill from google/adk-python, published by the product's own GitHub organization. Builds ADK (Agent Development Kit) Python agents: LLM agents with tools, graph workflows of function and agent nodes, conditional routing, fan-out and join, schema-validated delegation between agents, human-in-the-loop pauses, and pytest coverage for all of it. Use when asked to create an agent or a workflow, add a tool to one, branch or loop between nodes, run steps in parallel, pause for user approval, or test an agent. Don't use for explaining how ADK works internally or designing its core components (use…
Its SKILL.md is about 880 tokens, which your agent loads only when the skill is triggered. The skill folder holds 18 other files, including reference files (for example `references/advanced-patterns.md`, `references/best-practices.md` and `references/callbacks-and-plugins.md`).
It sits in Agent Workflows, covering Building AI agents, Human-in-the-loop approvals and Unit testing. It works with pytest and Python. The repository describes itself as: An open-source, code-first Python toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control. The licence is Apache-2.0.
When your agent uses it
- Asked to create an agent
- Add a tool to one
- Loop between nodes
- Run steps in parallel
Example prompts
- “Use the adk-agent-builder skill to build ADK (Agent Development Kit) Python agents: LLM agents with tools, graph workflows of function and agent…”
- “/adk-agent-builder”
Requirements
- Python 3
What it can do on your machine
Read from SKILL.md and the folder at commit 666c26d. 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.
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
Adk Agent Builder loads about 879 tokens when it runs, and up to ~25k if it reads all its reference files. Until then it costs about 190 tokens; SKILL.md has 233 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
The full file from google/adk-python at commit 666c26d, republished under its Apache-2.0 licence (© google). 233 words, ~879 tokens.
Download SKILL.mdSave it as
.claude/skills/adk-agent-builder/SKILL.md (or your agent's skills folder). This skill also uses 17 other files; get the full folder from GitHub.- name
- adk-agent-builder
- description
- Builds ADK (Agent Development Kit) Python agents: LLM agents with tools, graph workflows of function and agent nodes, conditional routing, fan-out and join, schema-validated delegation between agents, human-in-the-loop pauses, and pytest coverage for all of it. Use when asked to create an agent or a workflow, add a tool to one, branch or loop between nodes, run steps in parallel, pause for user approval, or test an agent. Don't use for explaining how ADK works internally or designing its core components (use `adk-architecture`), for an agent that already runs but misbehaves (use `adk-debug`), for authoring a sample under `contributing/` (use `adk-sample-creator`), or for naming, typing, and formatting conventions (use `adk-style`).
ADK Agent Builder
Read only the reference that matches the task. Loading the whole tree costs context and buries the part that matters.
Every API below was checked against google-adk 2.6.2. If a symbol is missing
at runtime, read the source under src/google/adk/ rather than guessing a
neighbouring name.
Start here
| Task | Reference |
|---|---|
First agent, environment, adk CLI | getting-started.md |
| Which import path is the canonical one | import-paths.md |
| The rules that cause most runtime failures | best-practices.md |
Building blocks
- tool-catalog.md — function tools, MCP, OpenAPI,
Google API toolsets, built-in tools, custom
BaseToolandBaseToolset. - function-nodes.md — plain functions as nodes:
parameter resolution, generators,
node_inputtyping rules. - llm-agent-nodes.md — an
LlmAgentused as a workflow node: output types, instruction templates,output_schema, auto-wrapping behavior. - task-mode.md —
mode='task'andmode='single_turn'delegation with schema-validated input and output.
Graph orchestration
- routing-and-conditions.md — routed edges, dict routing maps, default routes, self-loops, revision loops.
- parallel-and-fanout.md — fan-out edges,
JoinNodefan-in,parallel_worker=Truelist processing. - dynamic-nodes.md — scheduling nodes at runtime
with
ctx.run_node()and imperative workflow construction. - human-in-the-loop.md —
RequestInput, resume behavior, resumable vs replayed sessions. - advanced-patterns.md — nested workflows,
retries, custom
BaseNodesubclasses, graph validation rules. - multi-agent.md — chat-transfer hierarchies, and
the deprecated
SequentialAgent/LoopAgent/ParallelAgentshells thatWorkflowreplaces.
Runtime and verification
- state-and-events.md — the
Contextobject,Eventfields, and how state flows between nodes. - session-and-state.md — session services, artifacts, memory, and state key scoping.
- callbacks-and-plugins.md — the six agent callbacks and app-level plugins.
- testing.md —
pytestwithInMemoryRunner, faking a model, asserting on node output.
© google, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 17 other files (references) in .agents/skills/adk-agent-builder of google/adk-python.
- SKILL.md
- references/advanced-patterns.md
- references/best-practices.md
- references/callbacks-and-plugins.md
- references/dynamic-nodes.md
- references/function-nodes.md
- references/getting-started.md
- references/human-in-the-loop.md
- references/import-paths.md
- references/llm-agent-nodes.md
- references/multi-agent.md
- references/parallel-and-fanout.md
- references/routing-and-conditions.md
- references/session-and-state.md
- references/state-and-events.md
- references/task-mode.md
- references/testing.md
- references/tool-catalog.md
Open the folder on GitHubat commit 666c26d
Compare with similar skills
Adk Agent Builder 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 |
|---|---|---|---|---|---|---|
| Adk Agent Builder this skillgoogle/adk-python | 22k | — | ~879 | Automated safety check: Pass | Apache-2.0 | |
| LexGuard MCP Developer GuideSeoNaRu/lexguard-mcp | 131 | — | ~1.1k | Automated safety check: Pass | Custom licence | |
| AWS Strandshoodini/ai-agents-skills | 282 | — | ~1.4k | Automated safety check: Pass | None | |
| Swarms Multi-Agent Frameworkkyegomez/swarms | 7.2k | — | ~5.5k | Automated safety check: Pass | Apache-2.0 | |
| Agent Squad Python Guide2FastLabs/agent-squad | 7.8k | — | ~4.7k | Automated safety check: Pass | Apache-2.0 | |
| Langgraph Human In The Looplangchain-ai/langchain-skills | 1.3k | 2 repos | ~4.1k | Automated safety check: Pass | MIT |
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Related
Categories
Questions about Adk Agent Builder
What does Adk Agent Builder do?
Builds ADK (Agent Development Kit) Python agents: LLM agents with tools, graph workflows of function and agent nodes, conditional routing, fan-out and join, schema-validated delegation between…. Adk Agent Builder is an agent skill from google/adk-python, published by the product's own GitHub organization. Builds ADK (Agent Development Kit) Python agents: LLM agents with tools, graph workflows of function and agent nodes, conditional routing, fan-out and join, schema-validated delegation between agents, human-in-the-loop pauses, and pytest coverage for all of it.
When should I use Adk Agent Builder?
Adk Agent Builder fits situations like: asked to create an agent; add a tool to one; loop between nodes; run steps in parallel.
How do I install Adk Agent Builder in Claude Code?
Run `npx skills add google/adk-python --skill adk-agent-builder -a claude-code`. Or copy the skill folder (.agents/skills/adk-agent-builder in google/adk-python) into .claude/skills/adk-agent-builder in your project. Claude Code loads it when a task matches its description.
How do I install Adk Agent Builder in Codex?
Run `npx skills add google/adk-python --skill adk-agent-builder -a codex`. Or copy the skill folder (.agents/skills/adk-agent-builder in google/adk-python) into .agents/skills/adk-agent-builder in your project. Codex loads it when a task matches its description.
Can I use Adk Agent Builder 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 google/adk-python --skill adk-agent-builder -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/adk-agent-builder, .gemini/skills/adk-agent-builder, .github/skills/adk-agent-builder and .opencode/skills/adk-agent-builder in your project.
What does Adk Agent Builder need to run?
SKILL.md names no scripts, command-line tools or credentials: Adk Agent Builder is instructions for the agent only. Our summary lists: Python 3.
Does Adk Agent Builder 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 Adk Agent Builder 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 Adk Agent Builder use?
Adk Agent Builder is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Adk Agent Builder use?
About 879 tokens (SKILL.md is roughly 3.5k 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 24k tokens, read only when the agent opens those files.
What are the alternatives to Adk Agent Builder?
Skills that share tags, products or a category with Adk Agent Builder: LexGuard MCP Developer Guide (SeoNaRu/lexguard-mcp, 131 stars), AWS Strands (hoodini/ai-agents-skills, 282 stars), Swarms Multi-Agent Framework (kyegomez/swarms, 7.2k stars) and Agent Squad Python Guide (2FastLabs/agent-squad, 7.8k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Adk Agent Builder?
google (a GitHub organization, an official publisher) maintains it in google/adk-python, which has 21,729 GitHub stars. The repository holds 13 skills in this directory. The repository was last updated on October 7, 2026.
Source: google/adk-python on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.