feat: Add ADK Java Issue Triaging Agent sample

.github/workflows/triage-adk-java-issues.yml

@@ -0,0 +1,80 @@
+# Triages newly-opened (and, on a schedule, untriaged) adk-java issues with the
+# ADK Issue Triaging Agent sample under contrib/samples/github/adktriaging.
+#
+# Required repository secrets:
+#   - GOOGLE_API_KEY    : Gemini API key (or wire up Vertex AI credentials and
+#                         set GOOGLE_GENAI_USE_VERTEXAI=TRUE).
+# Labeling/assignment uses the built-in GITHUB_TOKEN (no secret to manage); the
+# `permissions:` block below grants it the `issues: write` scope it needs. Swap
+# in a PAT only if you specifically want triage actions attributed to a distinct
+# bot identity.
+name: ADK Issue Triaging Agent
+
+on:
+  issues:
+    types: [opened]
+  schedule:
+    # Run every 6 hours to triage untriaged issues.
+    - cron: '0 */6 * * *'
+  workflow_dispatch:
+
+# Serialize runs that touch the same issue so the scheduled batch sweep can't race
+# a per-issue run on that issue (which, with label appends, could duplicate labels).
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.issue.number || github.ref }}
+  cancel-in-progress: false
+
+jobs:
+  agent-triage-issues:
+    runs-on: ubuntu-latest
+    # Only run on the upstream repo, for newly-opened issues, the scheduled
+    # batch sweep, or a manual dispatch.
+    if: >-
+      github.repository == 'google/adk-java' && (
+        github.event_name == 'schedule' ||
+        github.event_name == 'workflow_dispatch' ||
+        github.event.action == 'opened'
+      )
+    permissions:
+      issues: write
+      contents: read
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Set up Java
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: '17'
+          cache: maven
+
+      - name: Run Triaging Agent
+        env:
+          # Built-in token scoped by the `permissions:` block above. Replace with a
+          # PAT (e.g. ${{ secrets.ADK_TRIAGE_AGENT }}) only if you need a distinct
+          # bot identity for the label/assignment actions.
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GOOGLE_API_KEY: ${{ secrets.GOOGLE_API_KEY }}
+          GOOGLE_GENAI_USE_VERTEXAI: 'FALSE'
+          OWNER: ${{ github.repository_owner }}
+          REPO: ${{ github.event.repository.name }}
+          INTERACTIVE: '0'
+          # Defaults to a dry run (logs intended labels/assignees without writing).
+          # Verify the pipeline, then set DRY_RUN to '0' to go live.
+          DRY_RUN: '1'
+          EVENT_NAME: ${{ github.event_name }}
+          ISSUE_NUMBER: ${{ github.event.issue.number }}
+          ISSUE_TITLE: ${{ github.event.issue.title }}
+          ISSUE_BODY: ${{ github.event.issue.body }}
+          # Number of issues to process per scheduled batch run.
+          ISSUE_COUNT_TO_PROCESS: '3'
+          # Comma-separated GitHub handles to round-robin assign issues to.
+          # Owner assignment is skipped while this is empty. Store the real
+          # handles in a repo secret/variable rather than committing them.
+          GTECH_ASSIGNEES: ${{ vars.GTECH_ASSIGNEES }}
+        run: |
+          ./mvnw -B -q \
+            -pl contrib/samples/github/adktriaging -am \
+            compile exec:java

contrib/samples/github/GitHubTools.java

@@ -32,18 +32,24 @@
 import org.kohsuke.github.GHPullRequest;
 import org.kohsuke.github.GHRelease;
 import org.kohsuke.github.GHRepository;
+import org.kohsuke.github.GHUser;
 import org.kohsuke.github.GitHub;
 import org.kohsuke.github.GitHubBuilder;
 
 /**
  * Reusable GitHub function tools backed by the {@code org.kohsuke:github-api} client. Each returns
- * a {@code Map} with a {@code "status"} of {@code "success"} or {@code "error"}. Reads {@code
- * GITHUB_TOKEN} from the environment; callers set {@link #dryRun} to gate writes.
+ * a {@code Map} with a {@code "status"} of {@code "success"}, {@code "error"} or {@code "dry_run"}.
+ * Reads {@code GITHUB_TOKEN} from the environment; callers set {@link #dryRun} to gate writes.
  *
- * <p>Defense in depth against prompt injection: the agent reads untrusted GitHub content (diffs,
+ * <p>The tools cover the operations needed by the ADK GitHub automation samples: reading releases,
+ * diffs and file contents; searching code; listing and reading issues; creating issues and pull
+ * requests; and labelling/assigning issues.
+ *
+ * <p>Defense in depth against prompt injection: the agents read untrusted GitHub content (diffs,
  * file contents, issue/PR titles) and could be steered into harmful writes. Independently of the
  * prompt, the write tools (a) only target {@link #writeRepoOwner}/{@link #writeRepoName} when set,
- * (b) only modify Markdown files under {@code docs/}, and (c) are capped per run.
+ * (b) restrict pull requests to Markdown files under {@code docs/}, and (c) cap issue/PR creation
+ * per run.
  */
 public final class GitHubTools {
 
@@ -63,6 +69,7 @@ public final class GitHubTools {
   public static String writeRepoName = null;
 
   private static final int MAX_SEARCH_RESULTS = 50;
+  private static final int MAX_ISSUES_LISTED = 100;
   private static final String DOCS_UPDATES_LABEL = "docs updates";
   private static final String STATUS_KEY = "status";
   private static final String STATUS_SUCCESS = "success";
@@ -427,6 +434,204 @@ public static Map<String, Object> createPullRequest(
     }
   }
 
+  @Schema(
+      name = "list_open_issues",
+      description =
+          "Lists OPEN issues (excluding pull requests) for a repository. Each entry has the issue's"
+              + " number, title, body, html_url, labels and assignees.")
+  public static Map<String, Object> listOpenIssues(
+      @Schema(name = "repo_owner", description = "The repository owner.") String repoOwner,
+      @Schema(name = "repo_name", description = "The repository name.") String repoName,
+      @Schema(
+              name = "max_results",
+              description = "Maximum number of issues to return (capped at 100).",
+              optional = true)
+          Integer maxResults) {
+    int limit =
+        (maxResults == null || maxResults <= 0)
+            ? MAX_ISSUES_LISTED
+            : Math.min(maxResults, MAX_ISSUES_LISTED);
+    try {
+      GHRepository repo = connect().getRepository(repoOwner + "/" + repoName);
+      List<Map<String, Object>> issues = new ArrayList<>();
+      for (GHIssue issue : repo.getIssues(GHIssueState.OPEN)) {
+        if (issue.isPullRequest()) {
+          continue;
+        }
+        issues.add(formatIssue(issue));
+        if (issues.size() >= limit) {
+          break;
+        }
+      }
+      return success("issues", issues);
+    } catch (IOException | GHException e) {
+      return error("Failed to list issues: " + e.getMessage());
+    }
+  }
+
+  @Schema(
+      name = "get_issue",
+      description =
+          "Fetches a single OPEN or closed issue by number, returning its number, title, body,"
+              + " html_url, labels and assignees.")
+  public static Map<String, Object> getIssue(
+      @Schema(name = "repo_owner", description = "The repository owner.") String repoOwner,
+      @Schema(name = "repo_name", description = "The repository name.") String repoName,
+      @Schema(name = "issue_number", description = "The issue number to fetch.") int issueNumber) {
+    try {
+      GHRepository repo = connect().getRepository(repoOwner + "/" + repoName);
+      GHIssue issue = repo.getIssue(issueNumber);
+      if (issue.isPullRequest()) {
+        return error("#" + issueNumber + " is a pull request, not an issue.");
+      }
+      return success("issue", formatIssue(issue));
+    } catch (GHFileNotFoundException e) {
+      return error("Issue #" + issueNumber + " was not found.");
+    } catch (IOException | GHException e) {
+      return error("Failed to get issue #" + issueNumber + ": " + e.getMessage());
+    }
+  }
+
+  @Schema(
+      name = "add_label_to_issue",
+      description = "Adds a single label to an issue, preserving any labels already present.")
+  public static Map<String, Object> addLabelToIssue(
+      @Schema(name = "repo_owner", description = "The repository owner.") String repoOwner,
+      @Schema(name = "repo_name", description = "The repository name.") String repoName,
+      @Schema(name = "issue_number", description = "The issue number to label.") int issueNumber,
+      @Schema(name = "label", description = "The label to add.") String label) {
+    String targetError = writeTargetError(repoOwner, repoName);
+    if (targetError != null) {
+      return error(targetError);
+    }
+    if (dryRun) {
+      return dryRunPreview(
+          "DRY RUN: no label was added. Set DRY_RUN=0 to label issues for real.",
+          "issue_number",
+          issueNumber,
+          "label",
+          label);
+    }
+    try {
+      GHRepository repo = connect().getRepository(repoOwner + "/" + repoName);
+      repo.getIssue(issueNumber).addLabels(label);
+      Map<String, Object> result = new LinkedHashMap<>();
+      result.put("issue_number", issueNumber);
+      result.put("added_label", label);
+      return success(result);
+    } catch (IOException | GHException e) {
+      return error(
+          "Failed to add label '" + label + "' to issue #" + issueNumber + ": " + e.getMessage());
+    }
+  }
+
+  @Schema(
+      name = "remove_label_from_issue",
+      description =
+          "Removes a single label from an issue. Succeeds as a no-op if the label is not present.")
+  public static Map<String, Object> removeLabelFromIssue(
+      @Schema(name = "repo_owner", description = "The repository owner.") String repoOwner,
+      @Schema(name = "repo_name", description = "The repository name.") String repoName,
+      @Schema(name = "issue_number", description = "The issue number to unlabel.") int issueNumber,
+      @Schema(name = "label", description = "The label to remove.") String label) {
+    String targetError = writeTargetError(repoOwner, repoName);
+    if (targetError != null) {
+      return error(targetError);
+    }
+    if (dryRun) {
+      return dryRunPreview(
+          "DRY RUN: no label was removed. Set DRY_RUN=0 to modify issues for real.",
+          "issue_number",
+          issueNumber,
+          "label",
+          label);
+    }
+    try {
+      GHRepository repo = connect().getRepository(repoOwner + "/" + repoName);
+      repo.getIssue(issueNumber).removeLabel(label);
+      Map<String, Object> result = new LinkedHashMap<>();
+      result.put("issue_number", issueNumber);
+      result.put("removed_label", label);
+      return success(result);
+    } catch (GHFileNotFoundException e) {
+      // The label (or label-on-issue) was not present; removing it is a no-op success.
+      Map<String, Object> result = new LinkedHashMap<>();
+      result.put("issue_number", issueNumber);
+      result.put("removed_label", label);
+      result.put("note", "label was not present");
+      return success(result);
+    } catch (IOException | GHException e) {
+      return error(
+          "Failed to remove label '"
+              + label
+              + "' from issue #"
+              + issueNumber
+              + ": "
+              + e.getMessage());
+    }
+  }
+
+  @Schema(
+      name = "assign_issue",
+      description = "Adds one or more assignees (by GitHub handle) to an issue.")
+  public static Map<String, Object> assignIssue(
+      @Schema(name = "repo_owner", description = "The repository owner.") String repoOwner,
+      @Schema(name = "repo_name", description = "The repository name.") String repoName,
+      @Schema(name = "issue_number", description = "The issue number to assign.") int issueNumber,
+      @Schema(name = "assignees", description = "GitHub handles to assign.")
+          List<String> assignees) {
+    if (assignees == null || assignees.isEmpty()) {
+      return error("assignees must be non-empty.");
+    }
+    String targetError = writeTargetError(repoOwner, repoName);
+    if (targetError != null) {
+      return error(targetError);
+    }
+    if (dryRun) {
+      return dryRunPreview(
+          "DRY RUN: no assignee was added. Set DRY_RUN=0 to assign issues for real.",
+          "issue_number",
+          issueNumber,
+          "assignees",
+          assignees);
+    }
+    try {
+      GitHub github = connect();
+      GHRepository repo = github.getRepository(repoOwner + "/" + repoName);
+      List<GHUser> users = new ArrayList<>();
+      for (String assignee : assignees) {
+        users.add(github.getUser(assignee));
+      }
+      repo.getIssue(issueNumber).addAssignees(users);
+      Map<String, Object> result = new LinkedHashMap<>();
+      result.put("issue_number", issueNumber);
+      result.put("assignees", assignees);
+      return success(result);
+    } catch (IOException | GHException e) {
+      return error("Failed to assign issue #" + issueNumber + ": " + e.getMessage());
+    }
+  }
+
+  /** Formats an issue into the compact map (number, title, body, html_url, labels, assignees). */
+  private static Map<String, Object> formatIssue(GHIssue issue) {
+    Map<String, Object> info = new LinkedHashMap<>();
+    info.put("number", issue.getNumber());
+    info.put("title", issue.getTitle());
+    info.put("body", issue.getBody() == null ? "" : issue.getBody());
+    info.put("html_url", issue.getHtmlUrl() == null ? "" : issue.getHtmlUrl().toString());
+    List<String> labels = new ArrayList<>();
+    for (GHLabel label : issue.getLabels()) {
+      labels.add(label.getName());
+    }
+    info.put("labels", labels);
+    List<String> assignees = new ArrayList<>();
+    for (GHUser user : issue.getAssignees()) {
+      assignees.add(user.getLogin());
+    }
+    info.put("assignees", assignees);
+    return info;
+  }
+
   private static boolean hasDocsLabel(GHIssue issue) {
     for (GHLabel label : issue.getLabels()) {
       if (label.getName().equals(DOCS_UPDATES_LABEL)) {
@@ -515,4 +720,18 @@ private static Map<String, Object> error(String message) {
     response.put("error_message", message);
     return response;
   }
+
+  /**
+   * Builds a {@code dry_run} preview envelope from {@code message} and an even number of key/value
+   * pairs describing the write that would have happened.
+   */
+  private static Map<String, Object> dryRunPreview(String message, Object... keyValuePairs) {
+    Map<String, Object> preview = new LinkedHashMap<>();
+    preview.put(STATUS_KEY, STATUS_DRY_RUN);
+    preview.put("message", message);
+    for (int i = 0; i + 1 < keyValuePairs.length; i += 2) {
+      preview.put(String.valueOf(keyValuePairs[i]), keyValuePairs[i + 1]);
+    }
+    return preview;
+  }
 }

contrib/samples/github/adkreleasedocs/pom.xml

@@ -78,6 +78,21 @@
                     <target>${java.version}</target>
                     <parameters>true</parameters>
                 </configuration>
+                <executions>
+                    <!-- The shared github/ directory is on the source path (see build-helper
+                         below), so restrict the main compile to this sample's files plus the
+                         shared GitHubTools.java; otherwise sibling samples under github/ would
+                         also be compiled into this module. -->
+                    <execution>
+                        <id>default-compile</id>
+                        <configuration>
+                            <includes>
+                                <include>GitHubTools.java</include>
+                                <include>adkreleasedocs/*.java</include>
+                            </includes>
+                        </configuration>
+                    </execution>
+                </executions>
             </plugin>
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
@@ -104,12 +119,28 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-source-plugin</artifactId>
                 <configuration>
+                    <!-- The github/ source root recursively includes sibling samples; keep them
+                         out of this module's -Prelease sources jar. -->
                     <excludes>
                         <exclude>**/*.jar</exclude>
+                        <exclude>adktriaging/**</exclude>
                         <exclude>target/**</exclude>
                     </excludes>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+                <configuration>
+                    <!-- Mirror the source excludes: the github/ source root pulls in sibling
+                         samples (with their own, possibly test-scoped, dependencies) that are not
+                         on this module's Javadoc classpath, so the -Prelease attach-javadocs goal
+                         would otherwise fail. -->
+                    <sourceFileExcludes>
+                        <sourceFileExclude>adktriaging/**</sourceFileExclude>
+                    </sourceFileExcludes>
+                </configuration>
+            </plugin>
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>exec-maven-plugin</artifactId>