/google-agents-cli-adk-code

name: google-agents-cli-adk-code
description: >
  This skill should be used when the user wants to "write agent code",
  "build an agent with ADK", "add a tool", "create a callback", "define an agent",
  "use state management" — in a project that needs ADK (Agent Development Kit) API
  patterns and code examples.
  It provides a quick reference for agent types, tool definitions, orchestration
  patterns, callbacks, state management, the graph Workflow API, and reference
  recipes to study.
  Do NOT use for scaffolding (use google-agents-cli-scaffold) or deployment
  (use google-agents-cli-deploy).
metadata:
  author: Google
  license: Apache-2.0
  version: 1.13.0
  requires:
    bins:
      - agents-cli
    install: "uv tool install google-agents-cli"

ADK Code Reference

Activate `/google-agents-cli-workflow` first.

1. Study Recipes (No Project Needed)

**Python — read the topic index in `references/recipes.md` before answering "how do I build X".** Worked implementations exist for: sandboxed/per-user code execution, agent-loadable `SKILL.md` skills, cross-session memory, approval gates before risky actions, tool guardrails, per-user credentials, and scheduled/event-driven runs.

**Go — read the upstream [`examples/`](https://github.com/google/adk-go/tree/main/examples).** clone the repo and read the one matching the capability you need before implementing it.

2. Prerequisites for Writing Code

Do NOT write agent code until a project is scaffolded.

1. Verify project: run `agents-cli info` (proceed if config exists). 2. No project: load `/google-agents-cli-workflow` and agree the spec with the user (its Phase 0) before you scaffold. 3. Existing code: run `agents-cli scaffold enhance .`.

Quick Reference — Most Common Patterns

See `references/adk-python.md` and `references/adk-go.md` for Python and Go code examples, respectively.

---

References

Use the cheatsheets for common patterns. For deep knowledge, fetch the docs index or inspect the installed package.

| Reference | Language | When to read | |------|------|-------------| | `references/recipes.md` | Python | **Topic-indexed catalog of ADK reference recipes.** Read in workflow Phase 1 — before scaffolding and before writing code — maps a capability to the recipe that implements it. | | `references/adk-python.md` | Python | Core ADK API: `Agent`, tools, callbacks, plugins, state, artifacts, multi-agent systems, `SequentialAgent` / `ParallelAgent` / `LoopAgent`, custom `BaseAgent`, `ManagedAgent` (server-hosted first-party agents), A2A protocol, A2UI. Default for most agents. | | `references/adk-python-workflows.md` | Python | Graph-based Workflow API (ADK Python 2.0): nodes, edges, fan-out/fan-in, HITL, parallel processing. Use when you need explicit graph topology. | | `references/adk-python-live.md` | Python | Live and voice agents: `Runner.run_live`, `LiveRequestQueue`, model and regional availability, voice/`speech_config`, VAD, session limits, `/run_live` serving. Use for real-time voice or video agents. | | `references/adk-go.md` | Go | Core ADK Go API: `llmagent`, tools, callbacks, plugins, state, artifacts, multi-agent systems, sequential/parallel/loop agents, custom agents, the runner, serving over HTTP, A2A protocol, and ambient triggers. Default for most agents. | | `references/adk-go-workflows.md` | Go | Graph-based Workflow API: nodes, edges, fan-out/fan-in, HITL, parallel processing. Use when you need explicit graph topology. | | [`examples/`](https://github.com/google/adk-go/tree/main/examples) | Go | Runnable upstream programs — the closest thing to a recipe catalog for Go. | | `curl https://adk.dev/llms.txt` | Python | Docs index (every page title + URL). Fetch it, then `WebFetch` the specific page for anything beyond the cheatsheets. | | Installed ADK package | Python | Exact signatures and symbols — inspect the source (see "Inspecting ADK Source Code" in `references/adk-python.md`). |

Related Skills

• `/google-agents-cli-workflow` — Development workflow, coding guidelines, and operational rules
• `/google-agents-cli-scaffold` — Project creation and enhancement with `agents-cli scaffold create` / `scaffold enhance`
• `/google-agents-cli-eval` — Evaluation methodology, dataset schema, and the eval-fix loop
• `/google-agents-cli-deploy` — Deployment targets, CI/CD pipelines, and production workflows