fix: align AGENTS.md template section names with post-compaction extraction (#25029) (#25098)

Merged via squash.

Prepared head SHA: 8cd6cc8049
Co-authored-by: echoVic <16428813+echoVic@users.noreply.github.com>
Co-authored-by: jalehman <550978+jalehman@users.noreply.github.com>
Reviewed-by: @jalehman

src/auto-reply/reply/post-compaction-context.test.ts

@@ -226,4 +226,57 @@ Read WORKFLOW.md on startup.
     expect(result).not.toBeNull();
     expect(result).toContain("Current time:");
   });
+
+  it("falls back to legacy section names (Every Session / Safety)", async () => {
+    const content = `# Rules
+
+## Every Session
+
+Read SOUL.md and USER.md.
+
+## Safety
+
+Don't exfiltrate private data.
+
+## Other
+
+Ignore this.
+`;
+    fs.writeFileSync(path.join(tmpDir, "AGENTS.md"), content);
+    const result = await readPostCompactionContext(tmpDir);
+    expect(result).not.toBeNull();
+    expect(result).toContain("Every Session");
+    expect(result).toContain("Read SOUL.md");
+    expect(result).toContain("Safety");
+    expect(result).toContain("Don't exfiltrate");
+    expect(result).not.toContain("Other");
+  });
+
+  it("prefers new section names over legacy when both exist", async () => {
+    const content = `# Rules
+
+## Session Startup
+
+New startup instructions.
+
+## Every Session
+
+Old startup instructions.
+
+## Red Lines
+
+New red lines.
+
+## Safety
+
+Old safety rules.
+`;
+    fs.writeFileSync(path.join(tmpDir, "AGENTS.md"), content);
+    const result = await readPostCompactionContext(tmpDir);
+    expect(result).not.toBeNull();
+    expect(result).toContain("New startup instructions");
+    expect(result).toContain("New red lines");
+    expect(result).not.toContain("Old startup instructions");
+    expect(result).not.toContain("Old safety rules");
+  });
 });

src/auto-reply/reply/post-compaction-context.ts

@@ -53,9 +53,14 @@ export async function readPostCompactionContext(
       }
     })();
 
-    // Extract "## Session Startup" and "## Red Lines" sections
+    // Extract "## Session Startup" and "## Red Lines" sections.
+    // Also accept legacy names "Every Session" and "Safety" for backward
+    // compatibility with older AGENTS.md templates.
     // Each section ends at the next "## " heading or end of file
-    const sections = extractSections(content, ["Session Startup", "Red Lines"]);
+    let sections = extractSections(content, ["Session Startup", "Red Lines"]);
+    if (sections.length === 0) {
+      sections = extractSections(content, ["Every Session", "Safety"]);
+    }
 
     if (sections.length === 0) {
       return null;