diff --git a/src/shared/tmux/tmux-utils/stale-session-sweep.test.ts b/src/shared/tmux/tmux-utils/stale-session-sweep.test.ts
index 66b8323de..74a651a74 100644
--- a/src/shared/tmux/tmux-utils/stale-session-sweep.test.ts
+++ b/src/shared/tmux/tmux-utils/stale-session-sweep.test.ts
@@ -99,6 +99,19 @@ describe("sweepStaleOmoAgentSessionsWith", () => {
 		expect(fixture.killed).toEqual(["omo-agents-99991", "omo-agents-99992"])
 	})
 
+	it("#given suffixed sessions with dead PIDs #when sweep called #then they are also killed", async () => {
+		// given
+		fixture.setCandidates(["omo-agents-99991-1", "omo-agents-99992-abc123"])
+		fixture.setAlive(() => false)
+
+		// when
+		const result = await sweepStaleOmoAgentSessionsWith(fixture.deps)
+
+		// then
+		expect(result).toBe(2)
+		expect(fixture.killed).toEqual(["omo-agents-99991-1", "omo-agents-99992-abc123"])
+	})
+
 	it("#given session matches current PID #when sweep called #then it is NOT killed", async () => {
 		// given
 		fixture.setCandidates([`omo-agents-${fixture.deps.currentPid}`, "omo-agents-99999"])
@@ -139,9 +152,9 @@ describe("sweepStaleOmoAgentSessionsWith", () => {
 		expect(fixture.killSessionMock).toHaveBeenCalledTimes(1)
 	})
 
-	it("#given non-matching sessions mixed in #when sweep called #then only omo-agents-<pid> sessions are considered", async () => {
+	it("#given non-matching sessions mixed in #when sweep called #then only supported omo-agents session names are considered", async () => {
 		// given
-		fixture.setCandidates(["main", "omo-agents-99999", "other-session", "omo-agents-abc"])
+		fixture.setCandidates(["main", "omo-agents-99999", "omo-agents-99999-1-2", "other-session", "omo-agents-abc"])
 		fixture.setAlive(() => false)
 
 		// when
diff --git a/src/shared/tmux/tmux-utils/stale-session-sweep.ts b/src/shared/tmux/tmux-utils/stale-session-sweep.ts
index 48b88ad52..0ecb79110 100644
--- a/src/shared/tmux/tmux-utils/stale-session-sweep.ts
+++ b/src/shared/tmux/tmux-utils/stale-session-sweep.ts
@@ -1,4 +1,4 @@
-const STALE_SESSION_PATTERN = /^omo-agents-(\d+)$/
+const STALE_SESSION_PATTERN = /^omo-agents-(\d+)(?:-([A-Za-z0-9]+))?$/
 
 function getErrorMessage(error: unknown): string {
 	if (error instanceof Error) {