{
  "id": "support-agent-with-google-adk",
  "title": "Support Agent With Google ADK",
  "level": 3,
  "levelName": "Engineer",
  "tagline": "Build a redacted, authorized support review with retained replies and evidence, then run the same policy through real Google ADK agents.",
  "summary": "Build a redacted, authorized support review with retained replies and evidence, then run the same policy through real Google ADK agents.",
  "hours": 8,
  "languages": [
    "Python"
  ],
  "status": "ready",
  "source": "core",
  "author": {
    "name": "AI Engineering from Scratch",
    "github": "rohitg00"
  },
  "youWillBuild": "An HTML review page and support.json with the redacted ticket, selected capability, source guidance, reply or escalation and state history.",
  "usefulFor": [
    "An HTML review page and support.json with the redacted ticket, selected capability, source guidance, reply or escalation and state history."
  ],
  "skills": [
    "Validate before starting a session",
    "Route and authorize as separate decisions",
    "Retain the actual response in the handoff",
    "Reuse the policy inside the real ADK path"
  ],
  "prerequisites": [
    "Python dictionaries, exceptions and module imports.",
    "An async function and an iterator of model events.",
    "The distinction between classifying a request and authorizing a capability."
  ],
  "figures": true,
  "overviewFigure": "pj-support-agent-with-google-adk-1",
  "languageWhy": {
    "Python": "Stdlib data structures, explicit algorithms and deterministic local tests."
  },
  "demo": {
    "command": [
      "python3",
      "demo.py"
    ],
    "cwd": "solution"
  },
  "stages": [
    {
      "id": "01-intake",
      "title": "Validate before starting a session",
      "summary": "For invoice for sam@example.invalid api_key=EXAMPLE_TOKEN, the usable ticket text becomes invoice for [email] api_key=[redacted]. An empty string fails before routing. The same cleaned text must reach both the baseline and ADK path.",
      "language": "python",
      "languageWhy": "Python standard-library collections, bytes and file operations expose this stage directly.",
      "hours": 2,
      "difficulty": "starter",
      "figure": "pj-support-agent-with-google-adk-1",
      "concepts": [
        "input validation",
        "redaction",
        "source handling"
      ]
    },
    {
      "id": "02-routing",
      "title": "Route and authorize as separate decisions",
      "summary": "invoice refund selects billing and can use read_invoice. invoice login ties billing and access, so it escalates. A billing route requesting read_account is rejected even though that tool is valid for another specialist.",
      "language": "python",
      "languageWhy": "Python standard-library collections, bytes and file operations expose this stage directly.",
      "hours": 2,
      "difficulty": "core",
      "figure": "pj-support-agent-with-google-adk-2",
      "concepts": [
        "routing scores",
        "ties",
        "capability allowlists"
      ]
    },
    {
      "id": "03-handoff",
      "title": "Retain the actual response in the handoff",
      "summary": "begin followed by classify on invoice then respond with Check the invoice reference produces answered and retains response=\"Check the invoice reference\". The history records classify and respond. Classifying invoice login followed by respond fails; escalate is the valid transition.",
      "language": "python",
      "languageWhy": "Python standard-library collections, bytes and file operations expose this stage directly.",
      "hours": 2,
      "difficulty": "core",
      "figure": "pj-support-agent-with-google-adk-3",
      "concepts": [
        "state transitions",
        "immutable history",
        "response retention"
      ]
    },
    {
      "id": "04-adk-adapter",
      "title": "Reuse the policy inside the real ADK path",
      "summary": "A login ticket chooses read_account and access-recovery guidance. The fixture specialist replies using that guidance, and the final handoff stores the reply. A request for read_invoice under the access route raises PermissionError before a graph is run. Optional tests inspect model requests to ensure raw email and example keys did not cross the boundary.",
      "language": "python",
      "languageWhy": "Python standard-library collections, bytes and file operations expose this stage directly.",
      "hours": 2,
      "difficulty": "stretch",
      "figure": "pj-support-agent-with-google-adk-4",
      "concepts": [
        "ADK Workflow",
        "shared policy boundary",
        "provider injection"
      ],
      "runners": [
        {
          "language": "python"
        },
        {
          "language": "python",
          "optional": true,
          "requires": [
            "python:google.adk"
          ],
          "argv": [
            "{python}",
            "-m",
            "unittest",
            "discover",
            "-s",
            "{stage}/tests-framework",
            "-p",
            "test_framework.py"
          ]
        }
      ]
    }
  ],
  "demos": [
    {
      "gif": "media/run.gif",
      "poster": "media/run.png",
      "title": "Initialize and grade",
      "caption": "Recorded starter failure followed by all reference-solution stages passing. Reference passes do not earn learner certificates."
    },
    {
      "gif": "media/output.gif",
      "poster": "media/output.png",
      "title": "Inspect the output",
      "caption": "Actual output from the local deterministic demo command. See the README for fixture and live-adapter limits."
    },
    {
      "gif": "media/framework.gif",
      "poster": "media/framework.png",
      "title": "Verify the real SDK",
      "caption": "Actual optional SDK tests with installed dependencies and deterministic local models. No live cloud or model provider calls."
    }
  ]
}