fix: scope ADK Java docs release analyzer to a single language

contrib/samples/github/adkreleasedocs/README.md

@@ -17,7 +17,8 @@ The agent (`AdkDocsReleaseAnalyzerAgent`) is equipped with function tools
 hand-rolled REST code, no local cloning):
 
 1.  `list_releases` — find the two most recent release tags to compare.
-2.  `find_doc_issues` — list open `docs updates` issues to avoid duplicates.
+2.  `find_doc_issues` — list open `docs updates` issues for this code repo (one
+    language) to avoid duplicates.
 3.  `find_pull_requests_for_issue` — check whether an issue already has PRs.
 4.  `get_changed_files` — list files changed between the two tags (compare API).
 5.  `get_file_diff` — fetch the patch for an individual file.
@@ -83,6 +84,7 @@ Variable                  | Required | Default               | Description
 `CODE_OWNER`              | no       | `google`              | Owner of the code repository.
 `DOC_REPO`                | no       | `adk-docs`            | Docs repository name.
 `CODE_REPO`               | no       | `adk-java`            | Code repository name.
+`CODE_LANGUAGE`           | no       | `Java`                | Implementation language documented (docs stay single-language).
 `CODE_SOURCE_PATH_FILTER` | no       | `core/src/main/java/` | Only analyze changes under this path.
 `MODEL`                   | no       | `gemini-pro-latest`   | Model to use (a Pro model helps with deeper code understanding).
 

contrib/samples/github/adkreleasedocs/src/main/java/com/example/adkdocs/AdkDocsReleaseAnalyzerAgent.java

@@ -62,13 +62,18 @@ private static String buildInstruction() {
       rejection - report it instead.
 
     # 1. Identity
-    You are the ADK Docs Release Analyzer. You compare two releases of the ADK code repository and,
-    when documentation needs updating, file ONE GitHub issue and open a pull request per
-    recommendation that applies a SUBSTANTIVE documentation update. A substantive update means real
-    content: conceptual prose AND a complete, idiomatic %CODE_REPO% code example, or a brand new page
-    when a feature is undocumented for this language. Merely toggling a language-support label/pill
-    (e.g. adding a `<span class="lst-...">` tag) is NOT acceptable on its own. All access is through
-    GitHub tools; you never clone repositories locally.
+    You are the ADK Docs Release Analyzer for the %CODE_LANGUAGE% implementation of ADK (the
+    %CODE_REPO% repository). You compare two releases of that repository and, when documentation
+    needs updating, file ONE GitHub issue and open a pull request per recommendation that applies a
+    SUBSTANTIVE documentation update. A substantive update means real content: conceptual prose AND a
+    complete, idiomatic %CODE_LANGUAGE% code example, or a brand new page when a feature is
+    undocumented for %CODE_LANGUAGE%. Merely toggling a language-support label/pill (e.g. adding a
+    `<span class="lst-...">` tag) is NOT acceptable on its own. All access is through GitHub tools;
+    you never clone repositories locally.
+
+    SINGLE LANGUAGE: you document ONLY %CODE_LANGUAGE%. Never add, edit, or remove code examples or
+    sections for any other language (e.g. Python, TypeScript, Go, or the other JVM language). Read
+    other languages' docs only as a structural reference and leave their content untouched.
 
     # 2. Repositories
     - Code repository: %CODE_OWNER%/%CODE_REPO% (source of truth for APIs and real example code)
@@ -78,8 +83,9 @@ private static String buildInstruction() {
     1. Call `list_releases` for %CODE_OWNER%/%CODE_REPO%.
        - By default compare the two most recent releases (newest = end_tag, second newest =
          start_tag). If the user specifies tags, use those instead.
-    2. DEDUPE: call `find_doc_issues` for %DOC_OWNER%/%DOC_REPO% and look for an open issue titled
-       "Found docs updates needed from %CODE_REPO% release <start_tag> to <end_tag>".
+    2. DEDUPE: call `find_doc_issues` for %DOC_OWNER%/%DOC_REPO% with code_repo="%CODE_REPO%" (this
+       returns only %CODE_REPO% release issues, never other languages'). Look for an open issue
+       titled "Found docs updates needed from %CODE_REPO% release <start_tag> to <end_tag>".
        - If it exists, note its issue number and call `find_pull_requests_for_issue` for it. If that
          issue ALREADY has pull requests, STOP and report that it is already handled (issue + PR
          URLs). If the issue exists but has NO pull requests, reuse it (skip step 8) and continue.
@@ -98,9 +104,10 @@ API precisely (classes, functions, parameters, defaults, return types).
        (tabbed code blocks / per-language sections). Skip docs/api-reference/ (auto-generated).
     7. Decide the real documentation work for each change. Every recommendation must add real content,
        for example:
-       - Add a complete %CODE_REPO% code example to the relevant page, mirroring the existing
-         Python/Java tabs or sections (add the language tab/section WITH working code).
-       - Add or expand conceptual prose explaining the feature and how to use it in this language.
+       - Add a complete %CODE_LANGUAGE% code example to the relevant page, mirroring how other
+         languages are already presented (add the %CODE_LANGUAGE% tab/section WITH working code;
+         leave the other languages' tabs untouched).
+       - Add or expand conceptual prose explaining the feature and how to use it in %CODE_LANGUAGE%.
        - If the feature has NO page, CREATE a new page (full prose + example) at a sensible docs path.
        - Update the language-support label/pill too, but ALWAYS together with the content above.
        If NO documentation changes are warranted, create nothing and report that.
@@ -138,6 +145,7 @@ API precisely (classes, functions, parameters, defaults, return types).
     """
         .replace("%CODE_OWNER%", Settings.CODE_OWNER)
         .replace("%CODE_REPO%", Settings.CODE_REPO)
+        .replace("%CODE_LANGUAGE%", Settings.CODE_LANGUAGE)
         .replace("%DOC_OWNER%", Settings.DOC_OWNER)
         .replace("%DOC_REPO%", Settings.DOC_REPO)
         .replace("%CODE_SOURCE_PATH_FILTER%", Settings.CODE_SOURCE_PATH_FILTER);

contrib/samples/github/adkreleasedocs/src/main/java/com/example/adkdocs/AdkDocsReleaseAnalyzerRun.java

@@ -51,6 +51,8 @@ public final class AdkDocsReleaseAnalyzerRun implements Runnable {
       names = "--dry-run",
       negatable = true,
       defaultValue = "true",
+      // Keeps "--dry-run" = true; without it picocli assigns the opposite of defaultValue.
+      fallbackValue = "true",
       description =
           "Preview the issue without creating it (default). Use --no-dry-run to file it for real.")
   private boolean dryRun;

contrib/samples/github/adkreleasedocs/src/main/java/com/example/adkdocs/Settings.java

@@ -24,6 +24,9 @@ final class Settings {
   static final String DOC_REPO = envOrDefault("DOC_REPO", "adk-docs");
   static final String CODE_REPO = envOrDefault("CODE_REPO", "adk-java");
 
+  /** Implementation language documented by this analyzer; docs stay single-language. */
+  static final String CODE_LANGUAGE = envOrDefault("CODE_LANGUAGE", "Java");
+
   /** Only changes under this path in the code repo are analyzed. */
   static final String CODE_SOURCE_PATH_FILTER =
       envOrDefault("CODE_SOURCE_PATH_FILTER", "core/src/main/java/");

contrib/samples/github/githubtools/src/main/java/com/example/github/GitHubTools.java

@@ -334,18 +334,30 @@ public static Map<String, Object> createIssue(
   @Schema(
       name = "find_doc_issues",
       description =
-          "Lists OPEN issues in a repository that carry the 'docs updates' label. Call this before"
-              + " creating an issue to avoid filing a duplicate for the same release range.")
+          "Lists OPEN issues in a repository that carry the 'docs updates' label, restricted to a"
+              + " single code repository's release issues. Call this before creating an issue to"
+              + " avoid filing a duplicate for the same release range.")
   public static Map<String, Object> findDocIssues(
       @Schema(name = "repo_owner", description = "The repository owner.") String repoOwner,
-      @Schema(name = "repo_name", description = "The repository name.") String repoName) {
+      @Schema(name = "repo_name", description = "The repository name.") String repoName,
+      @Schema(
+              name = "code_repo",
+              description =
+                  "Only return issues whose title mentions this code repository (e.g."
+                      + " \"adk-java\"), so results stay scoped to one language. Pass an empty"
+                      + " string for no filter.")
+          String codeRepo) {
     try {
       GHRepository repo = connect().getRepository(repoOwner + "/" + repoName);
+      String filter = codeRepo == null ? "" : codeRepo.trim().toLowerCase(Locale.ROOT);
       List<Map<String, Object>> issues = new ArrayList<>();
       for (GHIssue issue : repo.getIssues(GHIssueState.OPEN)) {
         if (issue.isPullRequest() || !hasDocsLabel(issue)) {
           continue;
         }
+        if (!issue.getTitle().toLowerCase(Locale.ROOT).contains(filter)) {
+          continue;
+        }
         Map<String, Object> info = new LinkedHashMap<>();
         info.put("number", issue.getNumber());
         info.put("title", issue.getTitle());