fix(signal): preserve newlines in debounced messages (#110090)

* fix(signal): use newlines in debounced messages

* docs: fix release gate command formatting

docs/start/onboarding-redesign.md

@@ -255,11 +255,16 @@ restart` from the real environment and verify the plist. Product follow-up:
 - **Agent landing needs exact-head hosted CI.** The heavy `CI` workflow may
   not queue on pushes under org load; the maintainer fallback is a
   release-gate dispatch on the PR branch:
-  `gh workflow run ci.yml --ref <branch> -f target_ref=<head-sha>
--f release_gate=true -f pull_request_number=<pr>` (the run must be on the
+
+  ```bash
+  gh workflow run ci.yml --ref <branch> -f target_ref=<head-sha> -f release_gate=true -f pull_request_number=<pr>
+  ```
+
+  The run must be on the
   branch ref so `head_sha` matches, and the title becomes
   `CI release gate <sha>`, which `scripts/verify-pr-hosted-gates.mjs`
-  accepts). Then `scripts/pr` prepare/merge as usual.
+  accepts. Then `scripts/pr` prepare/merge as usual.
+
 - **Gates that CI enforces beyond focused tests**: docs map
   (`pnpm docs:map:gen` after adding any docs page), oxlint (`no-map-spread`,
   `max-lines` — split files, never suppress), `check:test-types`, knip

extensions/signal/src/monitor/event-handler.inbound-context.test.ts

@@ -336,7 +336,7 @@ describe("signal createSignalEventHandler inbound context", () => {
     ).resolves.toEqual({ author: "+15550002222", body: "edited hello" });
   });
 
-  it("preserves the last debounced message body for native reply quote metadata", async () => {
+  it("joins debounced message bodies with newlines and preserves the last for replies", async () => {
     vi.useFakeTimers();
     const deliverRepliesMock = vi.fn().mockResolvedValue(undefined);
     dispatchInboundMessageMock.mockImplementationOnce(async (params: any) => {
@@ -386,7 +386,8 @@ describe("signal createSignalEventHandler inbound context", () => {
         expect(deliverRepliesMock).toHaveBeenCalledTimes(1);
       });
       const context = requireCapturedContext();
-      expect(context.BodyForAgent).toBe("first debounced message\\nsecond debounced message");
+      expect(context.BodyForAgent).toBe("first debounced message\nsecond debounced message");
+      expect(context.CommandBody).toBe("first debounced message\nsecond debounced message");
       expect(context.ReplyToId).toBe("1700000000002");
       expect(context.ReplyThreading).toEqual({ implicitCurrentMessage: "allow" });
       expect(deliverRepliesMock.mock.calls[0]?.[0]).toMatchObject({
@@ -2070,8 +2071,8 @@ describe("signal createSignalEventHandler inbound context", () => {
 
       const context = requireCapturedContext();
       expect(context.BodyForAgent).toContain("[signal attachment unavailable]");
-      expect(context.RawBody).toBe("first request\\nsecond request");
-      expect(context.CommandBody).toBe("first request\\nsecond request");
+      expect(context.RawBody).toBe("first request\nsecond request");
+      expect(context.CommandBody).toBe("first request\nsecond request");
     } finally {
       vi.useRealTimers();
     }

extensions/signal/src/monitor/event-handler.ts

@@ -731,11 +731,11 @@ export function createSignalEventHandler(deps: SignalEventHandlerDeps) {
     const combinedText = entries
       .map((entry) => entry.bodyText)
       .filter(Boolean)
-      .join("\\n");
+      .join("\n");
     const combinedCommandBody = entries
       .map((entry) => entry.commandBody)
       .filter(Boolean)
-      .join("\\n");
+      .join("\n");
     if (!combinedText.trim()) {
       await settle();
       return;