fix(coding-agent): keep daemon root sessions at depth zero

packages/coding-agent/CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## [Unreleased]
 
+- Fixed new top-level daemon sessions inheriting an RLM child depth from the supervisor process.
+
 ## [0.7.3] - 2026-08-17
 
 - Fixed assistant rendering when provider payloads contain null or sparse content blocks.

packages/coding-agent/src/modes/daemon/daemon-supervisor.ts

@@ -2181,23 +2181,25 @@ export class DaemonSupervisor {
 		const orphanProcessJournalPath =
 			existing?.descriptor.orphanProcessJournalPath ?? join(this.descriptorDir, `${workerId}.orphans.jsonl`);
 		const launch = createCliSubprocessLaunchSpec(["--mode", "daemon", "--daemon-socket", socketPath]);
+		const workerEnvironment = createCliSubprocessEnv({
+			...process.env,
+			...launchEnv,
+			[DAEMON_WORKER_ROLE_ENV]: "1",
+			[DAEMON_WORKER_TOKEN_ENV]: token,
+			[DAEMON_WORKER_ACTIVE_SESSION_ID_ENV]: rootActiveSessionId,
+			[DAEMON_WORKER_SUPERVISOR_SOCKET_ENV]: this.socketPath,
+			[DAEMON_WORKER_RECOVERY_JOURNAL_ENV]: recoveryJournalPath,
+			[DAEMON_WORKER_STARTUP_GATE_FD_ENV]: String(WORKER_STARTUP_GATE_FD),
+			[ORPHAN_PROCESS_JOURNAL_ENV]: orphanProcessJournalPath,
+			[SESSION_LEASES_ENABLED_ENV]: "1",
+			[SESSION_LEASE_OWNER_ID_ENV]: rootActiveSessionId,
+		});
+		delete workerEnvironment.RLM_DEPTH;
 		await this.assertRecoveryAllowed();
 		const child: ChildProcess = spawn(launch.command, launch.args, {
 			cwd: createCommand.config?.cwd ?? process.cwd(),
 			detached: true,
-			env: createCliSubprocessEnv({
-				...process.env,
-				...launchEnv,
-				[DAEMON_WORKER_ROLE_ENV]: "1",
-				[DAEMON_WORKER_TOKEN_ENV]: token,
-				[DAEMON_WORKER_ACTIVE_SESSION_ID_ENV]: rootActiveSessionId,
-				[DAEMON_WORKER_SUPERVISOR_SOCKET_ENV]: this.socketPath,
-				[DAEMON_WORKER_RECOVERY_JOURNAL_ENV]: recoveryJournalPath,
-				[DAEMON_WORKER_STARTUP_GATE_FD_ENV]: String(WORKER_STARTUP_GATE_FD),
-				[ORPHAN_PROCESS_JOURNAL_ENV]: orphanProcessJournalPath,
-				[SESSION_LEASES_ENABLED_ENV]: "1",
-				[SESSION_LEASE_OWNER_ID_ENV]: rootActiveSessionId,
-			}),
+			env: workerEnvironment,
 			stdio: ["ignore", "ignore", "pipe", "pipe"],
 		});
 		const detachWorkerStderr = child.stderr

packages/coding-agent/test/daemon-supervisor-process.test.ts

@@ -80,6 +80,7 @@ function spawnSupervisor(
 	socketPath: string,
 	cwd: string,
 	extraArgs: readonly string[] = [],
+	extraEnv: NodeJS.ProcessEnv = {},
 ): ChildProcess {
 	daemonSockets.add(socketPath);
 	const child = spawn(
@@ -89,6 +90,7 @@ function spawnSupervisor(
 			cwd,
 			env: {
 				...process.env,
+				...extraEnv,
 				[ENV_AGENT_DIR]: agentDir,
 				PI_OFFLINE: "1",
 				TSX_TSCONFIG_PATH: resolve(__dirname, "../../../tsconfig.json"),
@@ -286,6 +288,35 @@ async function startBlockingBash(client: DaemonClient, activeSessionId: string,
 }
 
 describe("daemon supervisor resident workers", () => {
+	it("creates top-level sessions at depth zero when the supervisor inherits a child depth", async () => {
+		const root = tempDir();
+		const agentDir = join(root, "agent");
+		const projectDir = join(root, "project");
+		const sessionDir = join(agentDir, "sessions");
+		const socketPath = join(tmpdir(), `prime-supervisor-depth-${process.pid}-${randomUUID().slice(0, 8)}.sock`);
+		mkdirSync(projectDir, { recursive: true });
+
+		const supervisor = spawnSupervisor(agentDir, socketPath, projectDir, [], { RLM_DEPTH: "1" });
+		const client = await connectEventually(socketPath, supervisor);
+		const created = await client.request({
+			type: "create",
+			config: { cwd: projectDir, agentDir, sessionDir, noTools: true, noExtensions: true },
+		});
+		if (!created.success) throw new Error(created.error);
+		const summary = requireSummary(created.data);
+		if (!summary.workerPid || !summary.sessionFile) throw new Error("Worker did not expose its session identity");
+		workerPids.add(summary.workerPid);
+
+		expect(summary).toMatchObject({ runtimeKind: "top-level", rlmDepth: 0 });
+		expect(await readSessionInfo(summary.sessionFile)).toMatchObject({ rlmDepth: 0, parentSessionPath: undefined });
+
+		await client.request({ type: "shutdown" });
+		client.close();
+		await waitForProcessGone(summary.workerPid);
+		workerPids.delete(summary.workerPid);
+		await waitForSocketGone(socketPath);
+	}, 60_000);
+
 	it("lists, creates, and attaches passive children through their owning worker", async () => {
 		const root = tempDir();
 		const agentDir = join(root, "agent");