feat(handoffs): include project identity in all Next Up blocks (#1948) (#2287)

* feat(handoffs): include project identity in all Next Up blocks

Adds project_code and project_title to withProjectRoot() and updates
all 30 Next Up headings across 18 workflow files to include
[PROJECT_CODE] PROJECT_TITLE suffix for multi-project clarity.

Closes #1948

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix(review): add withProjectRoot tests and fix placeholder syntax (#1951)

Address code review feedback:
- Add 4 tests for project_code/project_title injection in withProjectRoot()
- Fix inconsistent placeholder syntax in continuation-format.md canonical
  template (bare-brace → shell-dollar to match variant examples)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix(phase): preserve zero-padded prefix in renameDecimalPhases

Captures the zero-padded prefix (e.g. "06" from "06.3-slug") with
(0*${baseInt}) so renamed directories keep their original format
(06.2-slug) instead of stripping padding (6.2-slug).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Brandon Higgins <brandonscotthiggins@gmail.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/init.test.cjs

@@ -1426,6 +1426,87 @@ describe('#2192: init plan-phase includes auto-advance config to prevent separat
   });
 });
 
+// ─────────────────────────────────────────────────────────────────────────────
+// withProjectRoot: project identity injection (#1948)
+// ─────────────────────────────────────────────────────────────────────────────
+
+describe('withProjectRoot project identity', () => {
+  let tmpDir;
+
+  beforeEach(() => {
+    tmpDir = createTempProject();
+  });
+
+  afterEach(() => {
+    cleanup(tmpDir);
+  });
+
+  test('injects project_code when config.project_code is set', () => {
+    fs.writeFileSync(
+      path.join(tmpDir, '.planning', 'config.json'),
+      JSON.stringify({ project_code: 'CK' })
+    );
+
+    const result = runGsdTools(['init', 'quick', 'test task'], tmpDir, { HOME: tmpDir });
+    assert.ok(result.success, `Command failed: ${result.error}`);
+
+    const output = JSON.parse(result.output);
+    assert.strictEqual(output.project_code, 'CK');
+  });
+
+  test('injects project_title extracted from PROJECT.md H1', () => {
+    fs.writeFileSync(
+      path.join(tmpDir, '.planning', 'config.json'),
+      JSON.stringify({ project_code: 'CK' })
+    );
+    fs.writeFileSync(
+      path.join(tmpDir, '.planning', 'PROJECT.md'),
+      '# CareKit\n\nA care management platform.\n'
+    );
+
+    const result = runGsdTools(['init', 'quick', 'test task'], tmpDir, { HOME: tmpDir });
+    assert.ok(result.success, `Command failed: ${result.error}`);
+
+    const output = JSON.parse(result.output);
+    assert.strictEqual(output.project_title, 'CareKit');
+  });
+
+  test('omits project_code and project_title when project_code is not set', () => {
+    fs.writeFileSync(
+      path.join(tmpDir, '.planning', 'config.json'),
+      JSON.stringify({})
+    );
+
+    const result = runGsdTools(['init', 'quick', 'test task'], tmpDir, { HOME: tmpDir });
+    assert.ok(result.success, `Command failed: ${result.error}`);
+
+    const output = JSON.parse(result.output);
+    assert.strictEqual(output.project_code, undefined,
+      'project_code should not be present when not configured');
+    // project_title may or may not be present depending on PROJECT.md existence,
+    // but without project_code the workflow omits the identity suffix entirely
+  });
+
+  test('omits project_title when PROJECT.md does not exist', () => {
+    fs.writeFileSync(
+      path.join(tmpDir, '.planning', 'config.json'),
+      JSON.stringify({ project_code: 'CK' })
+    );
+    // Ensure no PROJECT.md exists (createTempProject doesn't create one)
+    const projectMdPath = path.join(tmpDir, '.planning', 'PROJECT.md');
+    if (fs.existsSync(projectMdPath)) fs.unlinkSync(projectMdPath);
+
+    const result = runGsdTools(['init', 'quick', 'test task'], tmpDir, { HOME: tmpDir });
+    assert.ok(result.success, `Command failed: ${result.error}`);
+
+    const output = JSON.parse(result.output);
+    assert.strictEqual(output.project_code, 'CK',
+      'project_code should still be present');
+    assert.strictEqual(output.project_title, undefined,
+      'project_title should not be present when PROJECT.md is missing');
+  });
+});
+
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