chore: create an initial prototype agent to triage pull requests

contributing/samples/adk_pr_triaging_agent/__init__.py

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+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from . import agent

contributing/samples/adk_pr_triaging_agent/agent.py

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+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+from pathlib import Path
+from typing import Any
+
+from adk_pr_triaging_agent.settings import BOT_LABEL
+from adk_pr_triaging_agent.settings import GITHUB_BASE_URL
+from adk_pr_triaging_agent.settings import IS_INTERACTIVE
+from adk_pr_triaging_agent.settings import OWNER
+from adk_pr_triaging_agent.settings import REPO
+from adk_pr_triaging_agent.utils import error_response
+from adk_pr_triaging_agent.utils import get_diff
+from adk_pr_triaging_agent.utils import post_request
+from adk_pr_triaging_agent.utils import read_file
+from adk_pr_triaging_agent.utils import run_graphql_query
+from google.adk import Agent
+import requests
+
+LABEL_TO_OWNER = {
+    "documentation": "polong-lin",
+    "services": "DeanChensj",
+    "tools": "seanzhou1023",
+    "eval": "ankursharmas",
+    "live": "hangfei",
+    "models": "selcukgun",
+    "tracing": "Jacksunwei",
+    "core": "Jacksunwei",
+    "web": "wyf7107",
+}
+
+CONTRIBUTING_MD = read_file(
+    Path(__file__).resolve().parents[3] / "CONTRIBUTING.md"
+)
+
+APPROVAL_INSTRUCTION = (
+    "Do not ask for user approval for labeling or commenting! If you can't find"
+    " appropriate labels for the PR, do not label it."
+)
+if IS_INTERACTIVE:
+  APPROVAL_INSTRUCTION = (
+      "Only label or comment when the user approves the labeling or commenting!"
+  )
+
+
+def get_pull_request_details(pr_number: int) -> str:
+  """Get the details of the specified pull request.
+
+  Args:
+    pr_number: number of the Github pull request.
+
+  Returns:
+    The status of this request, with the details when successful.
+  """
+  print(f"Fetching details for PR #{pr_number} from {OWNER}/{REPO}")
+  query = """
+    query($owner: String!, $repo: String!, $prNumber: Int!) {
+      repository(owner: $owner, name: $repo) {
+        pullRequest(number: $prNumber) {
+          id
+          title
+          body
+          author {
+            login
+          }
+          labels(last: 10) {
+            nodes {
+              name
+            }
+          }
+          files(last: 50) {
+            nodes {
+              path
+            }
+          }
+          comments(last: 50) {
+            nodes {
+              id
+              body
+              createdAt
+              author {
+                login
+              }
+            }
+          }
+          commits(last: 50) {
+            nodes {
+              commit {
+                url
+                message
+              }
+            }
+          }
+          statusCheckRollup {
+            state
+            contexts(last: 20) {
+              nodes {
+                ... on StatusContext {
+                  context
+                  state
+                  targetUrl
+                }
+                ... on CheckRun {
+                  name
+                  status
+                  conclusion
+                  detailsUrl
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  """
+  variables = {"owner": OWNER, "repo": REPO, "prNumber": pr_number}
+  url = f"{GITHUB_BASE_URL}/repos/{OWNER}/{REPO}/pulls/{pr_number}"
+
+  try:
+    response = run_graphql_query(query, variables)
+    if "errors" in response:
+      return error_response(str(response["errors"]))
+
+    pr = response.get("data", {}).get("repository", {}).get("pullRequest")
+    if not pr:
+      return error_response(f"Pull Request #{pr_number} not found.")
+
+    # Filter out main merge commits.
+    original_commits = pr.get("commits", {}).get("nodes", {})
+    if original_commits:
+      filtered_commits = [
+          commit_node
+          for commit_node in original_commits
+          if not commit_node["commit"]["message"].startswith(
+              "Merge branch 'main' into"
+          )
+      ]
+      pr["commits"]["nodes"] = filtered_commits
+
+    # Get diff of the PR and truncate it to avoid exceeding the maximum tokens.
+    pr["diff"] = get_diff(url)[:10000]
+
+    return {"status": "success", "pull_request": pr}
+  except requests.exceptions.RequestException as e:
+    return error_response(str(e))
+
+
+def add_label_and_reviewer_to_pr(pr_number: int, label: str) -> dict[str, Any]:
+  """Adds a specified label and requests a review from a mapped reviewer on a PR.
+
+  Args:
+      pr_number: the number of the Github pull request
+      label: the label to add
+
+  Returns:
+      The the status of this request, with the applied label and assigned
+      reviewer when successful.
+  """
+  print(f"Attempting to add label '{label}' and a reviewer to PR #{pr_number}")
+  if label not in LABEL_TO_OWNER:
+    return error_response(
+        f"Error: Label '{label}' is not an allowed label. Will not apply."
+    )
+
+  # Pull Request is a special issue in Github, so we can use issue url for PR.
+  label_url = (
+      f"{GITHUB_BASE_URL}/repos/{OWNER}/{REPO}/issues/{pr_number}/labels"
+  )
+  label_payload = [label, BOT_LABEL]
+
+  try:
+    response = post_request(label_url, label_payload)
+  except requests.exceptions.RequestException as e:
+    return error_response(f"Error: {e}")
+
+  owner = LABEL_TO_OWNER.get(label, None)
+  if not owner:
+    return {
+        "status": "warning",
+        "message": (
+            f"{response}\n\nLabel '{label}' does not have an owner. Will not"
+            " assign."
+        ),
+        "applied_label": label,
+    }
+  reviewer_url = f"{GITHUB_BASE_URL}/repos/{OWNER}/{REPO}/pulls/{pr_number}/requested_reviewers"
+  reviewer_payload = {"reviewers": [owner]}
+  try:
+    post_request(reviewer_url, reviewer_payload)
+  except requests.exceptions.RequestException as e:
+    return {
+        "status": "warning",
+        "message": f"Reviewer not assigned: {e}",
+        "applied_label": label,
+    }
+
+  return {
+      "status": "success",
+      "applied_label": label,
+      "assigned_reviewer": owner,
+  }
+
+
+def add_comment_to_pr(pr_number: int, comment: str) -> dict[str, Any]:
+  """Add the specified comment to the given PR number.
+
+  Args:
+    pr_number: the number of the Github pull request
+    comment: the comment to add
+
+  Returns:
+    The the status of this request, with the applied comment when successful.
+  """
+  print(f"Attempting to add comment '{comment}' to issue #{pr_number}")
+
+  # Pull Request is a special issue in Github, so we can use issue url for PR.
+  url = f"{GITHUB_BASE_URL}/repos/{OWNER}/{REPO}/issues/{pr_number}/comments"
+  payload = {"body": comment}
+
+  try:
+    post_request(url, payload)
+  except requests.exceptions.RequestException as e:
+    return error_response(f"Error: {e}")
+  return {
+      "status": "success",
+      "added_comment": comment,
+  }
+
+
+root_agent = Agent(
+    model="gemini-2.5-pro",
+    name="adk_pr_triaging_assistant",
+    description="Triage ADK pull requests.",
+    instruction=f"""
+      # 1. Identity
+      You are a Pull Request (PR) triaging bot for the Github {REPO} repo with the owner {OWNER}.
+
+      # 2. Responsibilities
+      Your core responsibility includes:
+      - Get the pull request details.
+      - Add a label to the pull request.
+      - Assign a reviewer to the pull request.
+      - Check if the pull request is following the contribution guidelines.
+      - Add a comment to the pull request if it's not following the guidelines.
+
+      **IMPORTANT: {APPROVAL_INSTRUCTION}**
+
+      # 3. Guidelines & Rules
+      Here are the rules for labeling:
+      - If the PR is about documentations, label it with "documentation".
+      - If it's about session, memory, artifacts services, label it with "services"
+      - If it's about UI/web, label it with "web"
+      - If it's related to tools, label it with "tools"
+      - If it's about agent evalaution, then label it with "eval".
+      - If it's about streaming/live, label it with "live".
+      - If it's about model support(non-Gemini, like Litellm, Ollama, OpenAI models), label it with "models".
+      - If it's about tracing, label it with "tracing".
+      - If it's agent orchestration, agent definition, label it with "core".
+      - If you can't find a appropriate labels for the PR, follow the previous instruction that starts with "IMPORTANT:".
+
+      Here is the contribution guidelines:
+      `{CONTRIBUTING_MD}`
+
+      Here are the guidelines for checking if the PR is following the guidelines:
+      - The "statusCheckRollup" in the pull request details may help you to identify if the PR is following some of the guidelines (e.g. CLA compliance).
+
+      Here are the guidelines for the comment:
+      - **Be Polite and Helpful:** Start with a friendly tone.
+      - **Be Specific:** Clearly list only the sections from the contribution guidelines that are still missing.
+      - **Address the Author:** Mention the PR author by their username (e.g., `@username`).
+      - **Provide Context:** Explain *why* the information or action is needed.
+      - **Do not be repetitive:** If you have already commented on an PR asking for information, do not comment again unless new information has been added and it's still incomplete.
+      - **Identify yourself:** Include a bolded note (e.g. "Response from ADK Triaging Agent") in your comment to indicate this comment was added by an ADK Answering Agent.
+
+      **Example Comment for a PR:**
+      > **Response from ADK Triaging Agent**
+      >
+      > Hello @[pr-author-username], thank you for creating this PR!
+      >
+      > This PR is a bug fix, could you please associate the github issue with this PR? If there is no existing issue, could you please create one?
+      >
+      > In addition, could you please provide logs or screenshot after the fix is applied?
+      >
+      > This information will help reviewers to review your PR more efficiently. Thanks!
+
+      # 4. Steps
+      When you are given a PR, here are the steps you should take:
+      - Call the `get_pull_request_details` tool to get the details of the PR.
+      - Skip the PR (i.e. do not label or comment) if the PR is closed or is labeled with "{BOT_LABEL}" or "google-contributior".
+      - Check if the PR is following the contribution guidelines.
+        - If it's not following the guidelines, recommend or add a comment to the PR that points to the contribution guidelines (https://github.com/google/adk-python/blob/main/CONTRIBUTING.md).
+        - If it's following the guidelines, recommend or add a label to the PR.
+
+      # 5. Output
+      Present the followings in an easy to read format highlighting PR number and your label.
+      - The PR summary in a few sentence
+      - The label you recommended or added with the justification
+      - The owner of the label if you assigned a reviewer to the PR
+      - The comment you recommended or added to the PR with the justification
+    """,
+    tools=[
+        get_pull_request_details,
+        add_label_and_reviewer_to_pr,
+        add_comment_to_pr,
+    ],
+)

contributing/samples/adk_pr_triaging_agent/settings.py

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+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+
+from dotenv import load_dotenv
+
+load_dotenv(override=True)
+
+GITHUB_BASE_URL = "https://api.github.com"
+GITHUB_GRAPHQL_URL = GITHUB_BASE_URL + "/graphql"
+
+GITHUB_TOKEN = os.getenv("GITHUB_TOKEN")
+if not GITHUB_TOKEN:
+  raise ValueError("GITHUB_TOKEN environment variable not set")
+
+OWNER = os.getenv("OWNER", "google")
+REPO = os.getenv("REPO", "adk-python")
+BOT_LABEL = os.getenv("BOT_LABEL", "bot triaged")
+
+IS_INTERACTIVE = os.environ.get("INTERACTIVE", "1").lower() in ["true", "1"]