diff --git a/packages/server/src/client/daemon-client.ts b/packages/server/src/client/daemon-client.ts
index 37ce39b43..fa6777de5 100644
--- a/packages/server/src/client/daemon-client.ts
+++ b/packages/server/src/client/daemon-client.ts
@@ -3769,6 +3769,7 @@ export class DaemonClient {
         .arrayBuffer()
         .then((buffer) => {
           this.handleTransportMessage(buffer);
+          return;
         })
         .catch(() => {
           // Ignore failed blob decoding and allow reconnect logic to recover.
diff --git a/packages/server/src/server/agent/agent-manager.ts b/packages/server/src/server/agent/agent-manager.ts
index eb3f3a9cf..28c97d2e7 100644
--- a/packages/server/src/server/agent/agent-manager.ts
+++ b/packages/server/src/server/agent/agent-manager.ts
@@ -1914,6 +1914,7 @@ export class AgentManager {
               permission,
               lastMessage,
             });
+            return;
           })
           .catch(reject);
       };
@@ -2191,6 +2192,7 @@ export class AgentManager {
           return;
         }
         await this.dispatchSessionEvent(current, event);
+        return;
       })
       .catch((err) => {
         this.logger.error(
diff --git a/packages/server/src/server/agent/agent-storage.ts b/packages/server/src/server/agent/agent-storage.ts
index ee8a7ee87..6c05f61a0 100644
--- a/packages/server/src/server/agent/agent-storage.ts
+++ b/packages/server/src/server/agent/agent-storage.ts
@@ -140,6 +140,7 @@ export class AgentStorage {
 
       this.cache.set(agentId, record);
       this.pathById.set(agentId, nextPath);
+      return;
     });
 
     this.pendingWrites.set(
diff --git a/packages/server/src/server/agent/providers/__tests__/claude-agent.event-stream.integration.test.ts b/packages/server/src/server/agent/providers/__tests__/claude-agent.event-stream.integration.test.ts
index 40076d19c..efc2f3aef 100644
--- a/packages/server/src/server/agent/providers/__tests__/claude-agent.event-stream.integration.test.ts
+++ b/packages/server/src/server/agent/providers/__tests__/claude-agent.event-stream.integration.test.ts
@@ -123,6 +123,7 @@ async function startTurnAndCollectEvents(
       .startTurn(prompt)
       .then((result) => {
         turnId = result.turnId;
+        return;
       })
       .catch((error) => {
         clearTimeout(timeout);
@@ -384,6 +385,7 @@ test("Test 5: Interruption", async () => {
             return;
           }
           turnId = result.turnId;
+          return;
         })
         .catch((error) => {
           clearTimeout(timeout);
diff --git a/packages/server/src/server/agent/providers/acp-agent.ts b/packages/server/src/server/agent/providers/acp-agent.ts
index fc3ebb807..469c13678 100644
--- a/packages/server/src/server/agent/providers/acp-agent.ts
+++ b/packages/server/src/server/agent/providers/acp-agent.ts
@@ -908,6 +908,7 @@ export class ACPAgentSession implements AgentSession, ACPClient {
       })
       .then((response) => {
         this.handlePromptResponse(response, turnId);
+        return;
       })
       .catch((error) => {
         const message = error instanceof Error ? error.message : String(error);
diff --git a/packages/server/src/server/agent/providers/opencode-agent.ts b/packages/server/src/server/agent/providers/opencode-agent.ts
index e44138ea1..f644cf322 100644
--- a/packages/server/src/server/agent/providers/opencode-agent.ts
+++ b/packages/server/src/server/agent/providers/opencode-agent.ts
@@ -2057,6 +2057,7 @@ class OpenCodeAgentSession implements AgentSession {
               turnId,
             );
           }
+          return;
         })
         .catch((err) => {
           if (isOpenCodeHeadersTimeoutFailure(err)) {
@@ -2105,6 +2106,7 @@ class OpenCodeAgentSession implements AgentSession {
               turnId,
             );
           }
+          return;
         })
         .catch((error) => {
           this.finishForegroundTurn(
diff --git a/packages/server/src/server/agent/tts-manager.ts b/packages/server/src/server/agent/tts-manager.ts
index 3a7f39058..deec85e6f 100644
--- a/packages/server/src/server/agent/tts-manager.ts
+++ b/packages/server/src/server/agent/tts-manager.ts
@@ -317,6 +317,7 @@ export class TTSManager {
         if (result.kind === "prepared") {
           this.destroySpeechStream(result.prepared.stream);
         }
+        return;
       });
     }
   }
diff --git a/packages/server/src/server/loop-service.ts b/packages/server/src/server/loop-service.ts
index f4ab513d7..cf82851d6 100644
--- a/packages/server/src/server/loop-service.ts
+++ b/packages/server/src/server/loop-service.ts
@@ -885,6 +885,7 @@ export class LoopService {
         left.createdAt.localeCompare(right.createdAt),
       );
       await fs.writeFile(this.storePath, JSON.stringify(records, null, 2), "utf8");
+      return;
     });
     this.persistQueue = nextPersist.catch(() => {});
     await nextPersist;
diff --git a/packages/server/src/server/test-utils/fake-agent-client.ts b/packages/server/src/server/test-utils/fake-agent-client.ts
index 4453c58ba..cf0161f7d 100644
--- a/packages/server/src/server/test-utils/fake-agent-client.ts
+++ b/packages/server/src/server/test-utils/fake-agent-client.ts
@@ -961,6 +961,7 @@ class FakeAgentSession implements AgentSession {
     let interrupted = false;
     const interrupt = this.interruptSignal.promise.then(() => {
       interrupted = true;
+      return;
     });
     await Promise.race([interrupt, new Promise((r) => setTimeout(r, 500))]);
     if (!interrupted) {
diff --git a/packages/server/src/server/test-utils/paseo-daemon.ts b/packages/server/src/server/test-utils/paseo-daemon.ts
index e9ee185b7..35f8d3eaf 100644
--- a/packages/server/src/server/test-utils/paseo-daemon.ts
+++ b/packages/server/src/server/test-utils/paseo-daemon.ts
@@ -59,6 +59,7 @@ async function startDaemonWithTimeout(
       () => {
         clearTimeout(timeoutHandle);
         resolve();
+        return;
       },
       (error) => {
         clearTimeout(timeoutHandle);
diff --git a/packages/server/src/server/voice/voice-turn-controller.ts b/packages/server/src/server/voice/voice-turn-controller.ts
index 3c2f0b76d..5a38f03b9 100644
--- a/packages/server/src/server/voice/voice-turn-controller.ts
+++ b/packages/server/src/server/voice/voice-turn-controller.ts
@@ -89,6 +89,7 @@ export function createVoiceTurnController(params: {
     submissionQueue = submissionQueue
       .then(async () => {
         await params.utteranceSink.submitUtterance(utterance);
+        return;
       })
       .catch((error) => {
         fail(error);
diff --git a/packages/server/src/server/worktree-bootstrap.ts b/packages/server/src/server/worktree-bootstrap.ts
index 9c11ffcf9..8e7595475 100644
--- a/packages/server/src/server/worktree-bootstrap.ts
+++ b/packages/server/src/server/worktree-bootstrap.ts
@@ -614,6 +614,7 @@ export async function runAsyncWorktreeBootstrap(
           "Failed to emit live worktree setup timeline update",
         );
       }
+      return;
     });
   };
 
diff --git a/packages/server/src/utils/checkout-git.ts b/packages/server/src/utils/checkout-git.ts
index b6da738bf..924a6ae4e 100644
--- a/packages/server/src/utils/checkout-git.ts
+++ b/packages/server/src/utils/checkout-git.ts
@@ -1557,6 +1557,7 @@ export function warmCheckoutShortstatInBackground(
   void getOrLoadCheckoutShortstat(cwd, context)
     .then(() => {
       onComplete?.();
+      return;
     })
     .catch(() => {
       // Non-critical: keep listing path resilient even if git commands fail.