diff --git a/engine/src/utils/tool_runner.ts b/engine/src/utils/tool_runner.ts
index 984b272..0e94e50 100644
--- a/engine/src/utils/tool_runner.ts
+++ b/engine/src/utils/tool_runner.ts
@@ -141,7 +141,7 @@ async function main() {
                         '[tool_runner] Successfully parsed JSON args:',
                         JSON.stringify(parsedArgs)
                     );
-                } catch (err) {
+                } catch {
                     // If not valid JSON, use as-is
                     console.log(
                         '[tool_runner] Args not valid JSON, using as raw strings:',
diff --git a/host/src/browser/cdp/chrome_cdp_launcher.ts b/host/src/browser/cdp/chrome_cdp_launcher.ts
index 9e5b313..f439b82 100644
--- a/host/src/browser/cdp/chrome_cdp_launcher.ts
+++ b/host/src/browser/cdp/chrome_cdp_launcher.ts
@@ -49,7 +49,7 @@ async function checkExistingChromeInstance(port: number): Promise<boolean> {
         const { execSync } = await import('child_process');
         try {
             execSync(`nc -z localhost ${port}`);
-        } catch (e) {
+        } catch {
             console.log(`Port ${port} is not open, no Chrome instance found`);
             return false;
         }
@@ -92,7 +92,7 @@ async function connectToExistingChrome(
             const output = execSync(`lsof -i:${port} -t`).toString().trim();
             pid = parseInt(output, 10);
             console.log(`Found Chrome process with PID: ${pid}`);
-        } catch (e) {
+        } catch {
             console.log(`Could not determine PID of Chrome on port ${port}`);
         }
 
@@ -123,7 +123,7 @@ async function connectToExistingChrome(
                                 `Chrome process ${pid} still running, using SIGKILL`
                             );
                             execSync(`kill -KILL ${pid}`);
-                        } catch (e) {
+                        } catch {
                             // Process not found, which means it's already terminated
                             console.log(
                                 `Chrome process ${pid} successfully terminated`
@@ -304,7 +304,7 @@ export async function launchChrome(
 
             const chromeVersion = execSync(chromeCommand).toString().trim();
             console.log(`Detected Chrome version: ${chromeVersion}`);
-        } catch (e) {
+        } catch {
             console.log(
                 'Could not detect Chrome version, but continuing anyway'
             );
@@ -448,7 +448,7 @@ export async function shutdownChrome(
             const { execSync } = await import('child_process');
             execSync(`ps -p ${pid} > /dev/null 2>&1`);
             return true; // Process exists
-        } catch (e) {
+        } catch {
             return false; // Process doesn't exist
         }
     };
@@ -624,7 +624,7 @@ export async function getChromeInfo(): Promise<{
                         .toString()
                         .trim();
                     pid = parseInt(output, 10);
-                } catch (e) {
+                } catch {
                     // Ignore error
                 }
 
@@ -638,7 +638,7 @@ export async function getChromeInfo(): Promise<{
                         getDefaultChromeUserDataDir(),
                 };
             }
-        } catch (e) {
+        } catch {
             // Ignore errors and return not running
         }
     }
diff --git a/host/src/browser/cdp/chrome_profile_utils.ts b/host/src/browser/cdp/chrome_profile_utils.ts
index 351f988..f5f70c4 100644
--- a/host/src/browser/cdp/chrome_profile_utils.ts
+++ b/host/src/browser/cdp/chrome_profile_utils.ts
@@ -294,7 +294,7 @@ export function isChromeRunning(): boolean {
             }
         }
         return false;
-    } catch (error) {
+    } catch (_error) {
         // If the command fails, assume Chrome is not running
         return false;
     }
diff --git a/host/src/setup/setup.ts b/host/src/setup/setup.ts
index 358018f..ee0f169 100644
--- a/host/src/setup/setup.ts
+++ b/host/src/setup/setup.ts
@@ -105,7 +105,7 @@ function getRecentDirectories(baseDir: string, limit: number = 10): string[] {
                         name: dir.name,
                         mtime: stats.mtime.getTime(),
                     };
-                } catch (error) {
+                } catch (_error) {
                     // Skip directories we can't access
                     return null;
                 }