ADK Agent Builder

Build production-ready agents with Google’s Agent Development Kit (ADK): scaffolding, tool wiring, orchestration patterns, testing, and optional deployment to Vertex AI Agent Engine.

Overview

• Creates a minimal, production-oriented ADK scaffold (agent entrypoint, tool registry, config, and tests).

• Supports single-agent ReAct-style workflows and multi-agent orchestration (Sequential/Parallel/Loop).

• Produces a validation checklist suitable for CI (lint/tests/smoke prompts) and optional Agent Engine deployment verification.

Prerequisites

• Python runtime compatible with your project (often Python 3.10+)

• google-adk installed and importable

• If deploying: access to a Google Cloud project with Vertex AI enabled and permissions to deploy Agent Engine runtimes

• Secrets available via environment variables or a secret manager (never hardcoded)

Instructions

• Confirm scope: local-only agent scaffold vs Vertex AI Agent Engine deployment.

• Choose an architecture:

• Single agent (ReAct) for adaptive tool-driven tasks

• Multi-agent system (specialists + orchestrator) for complex, multi-step workflows

• Define the tool surface (built-in ADK tools + any custom tools you need) and required credentials.

• Scaffold the project:

• src/agents/ , src/tools/ , tests/ , and a dependency file (pyproject.toml or requirements.txt )

• Implement the minimum viable agent and a smoke test prompt; add regression tests for tool failures.

• If deploying, produce an adk deploy ... command and a post-deploy validation checklist (AgentCard/task endpoints, permissions, logs).

Output

• A repo-ready ADK scaffold (files and directories) plus starter agent code

• Tool stubs and wiring points (where to add new tools safely)

• A test + validation plan (unit tests and a minimal smoke prompt)

• Optional: deployment commands and verification steps for Agent Engine

Error Handling

• Dependency/runtime issues: provide pinned install commands and validate imports.

• Auth/permission failures: identify the missing role/API and propose least-privilege fixes.

• Tool failures/rate limits: add retries/backoff guidance and a regression test to prevent recurrence.

Examples

Example: Scaffold a single ReAct agent

• Request: “Create an ADK agent that summarizes PRs and proposes test updates.”

• Result: agent entrypoint + tool registry + a smoke test command for local verification.

Example: Multi-agent orchestrator

• Request: “Build a supervisor + deployer + verifier team and deploy to Agent Engine.”

• Result: orchestrator skeleton, per-agent responsibilities, and adk deploy ...

• post-deploy health checks.

Resources

• Full detailed guide (kept for reference): ${CLAUDE_SKILL_DIR}/references/SKILL.full.md

• Repo standards (source of truth):

• 000-docs/6767-a-SPEC-DR-STND-claude-code-plugins-standard.md

• 000-docs/6767-b-SPEC-DR-STND-claude-skills-standard.md

• ADK / Agent Engine docs: https://cloud.google.com/vertex-ai/docs/agent-engine