diff --git a/cli/src/claude/claudeLocal.ts b/cli/src/claude/claudeLocal.ts
index 2c860081..0524b0b9 100644
--- a/cli/src/claude/claudeLocal.ts
+++ b/cli/src/claude/claudeLocal.ts
@@ -1,4 +1,3 @@
-import { spawn } from "node:child_process";
 import { mkdirSync } from "node:fs";
 import { logger } from "@/ui/logger";
 import { restoreTerminalState } from "@/ui/terminalState";
@@ -6,14 +5,7 @@ import { claudeCheckSession } from "./utils/claudeCheckSession";
 import { getProjectPath } from "./utils/path";
 import { systemPrompt } from "./utils/systemPrompt";
 import { withBunRuntimeEnv } from "@/utils/bunRuntime";
-
-const isAbortError = (error: unknown): boolean => {
-    if (!error || typeof error !== 'object') {
-        return false;
-    }
-    const maybeError = error as { name?: string; code?: string };
-    return maybeError.name === 'AbortError' || maybeError.code === 'ABORT_ERR';
-};
+import { spawnWithAbort } from "@/utils/spawnWithAbort";
 
 export async function claudeLocal(opts: {
     abort: AbortSignal,
@@ -87,118 +79,21 @@ export async function claudeLocal(opts: {
                 ...opts.claudeEnvVars
             }
 
-            logger.debug('[ClaudeLocal] Spawning claude');
-            logger.debug(`[ClaudeLocal] Args: ${JSON.stringify(args)}`);
+            logger.debug(`[ClaudeLocal] Spawning claude with args: ${JSON.stringify(args)}`);
 
-            const child = spawn('claude', args, {
-                stdio: ['inherit', 'inherit', 'inherit'],
-                signal: opts.abort,
-                killSignal: 'SIGINT',
+            spawnWithAbort({
+                command: 'claude',
+                args,
                 cwd: opts.path,
                 env: withBunRuntimeEnv(env, { allowBunBeBun: false }),
+                signal: opts.abort,
+                logLabel: 'ClaudeLocal',
+                spawnName: 'claude',
+                installHint: 'Claude CLI',
+                includeCause: true,
+                logExit: true,
                 shell: process.platform === 'win32'
-            });
-            let settled = false;
-            const abortTimeoutMs = {
-                term: 1000,
-                kill: 3000
-            };
-            let abortTermTimeout: NodeJS.Timeout | null = null;
-            let abortKillTimeout: NodeJS.Timeout | null = null;
-            let forcedTermination = false;
-            let abortStartedAt: number | null = null;
-
-            const isAlive = () => child.exitCode === null && !child.killed;
-            const formatAbortElapsed = () => {
-                if (abortStartedAt === null) {
-                    return 'n/a';
-                }
-                return `${Date.now() - abortStartedAt}ms`;
-            };
-
-            const abortHandler = () => {
-                if (abortTermTimeout || abortKillTimeout) {
-                    logger.debug('[ClaudeLocal] Abort already in progress');
-                    return;
-                }
-                abortStartedAt = Date.now();
-                logger.debug('[ClaudeLocal] Abort signaled, waiting for SIGINT to exit');
-                abortTermTimeout = setTimeout(() => {
-                    if (isAlive()) {
-                        forcedTermination = true;
-                        logger.debug(`[ClaudeLocal] Abort timeout reached (${formatAbortElapsed()}), sending SIGTERM`);
-                        try {
-                            child.kill('SIGTERM');
-                        } catch (error) {
-                            logger.debug('[ClaudeLocal] Failed to send SIGTERM', error);
-                        }
-                    }
-
-                    abortKillTimeout = setTimeout(() => {
-                        if (isAlive()) {
-                            forcedTermination = true;
-                            logger.debug(`[ClaudeLocal] Abort timeout reached (${formatAbortElapsed()}), sending SIGKILL`);
-                            try {
-                                child.kill('SIGKILL');
-                            } catch (error) {
-                                logger.debug('[ClaudeLocal] Failed to send SIGKILL', error);
-                            }
-                        }
-                    }, abortTimeoutMs.kill);
-                }, abortTimeoutMs.term);
-            };
-
-            if (opts.abort.aborted) {
-                abortHandler();
-            } else {
-                opts.abort.addEventListener('abort', abortHandler);
-            }
-
-            const cleanupAbortHandler = () => {
-                if (abortTermTimeout) {
-                    clearTimeout(abortTermTimeout);
-                    abortTermTimeout = null;
-                }
-                if (abortKillTimeout) {
-                    clearTimeout(abortKillTimeout);
-                    abortKillTimeout = null;
-                }
-                opts.abort.removeEventListener('abort', abortHandler);
-            };
-            const finalize = (error?: Error) => {
-                if (settled) {
-                    return;
-                }
-                settled = true;
-                cleanupAbortHandler();
-                if (error) {
-                    reject(error);
-                } else {
-                    r();
-                }
-            };
-            child.on('error', (error) => {
-                if (opts.abort.aborted || isAbortError(error)) {
-                    logger.debug('[ClaudeLocal] Spawn aborted while switching');
-                    if (!child.pid) {
-                        finalize();
-                    }
-                    return;
-                }
-                const message = error instanceof Error ? error.message : String(error);
-                finalize(new Error(`Failed to spawn claude: ${message}. Is Claude installed and on PATH?`));
-            });
-            child.on('exit', (code, signal) => {
-                logger.debug(`[ClaudeLocal] Child exited (code=${code ?? 'null'}, signal=${signal ?? 'null'}, aborted=${opts.abort.aborted}, forced=${forcedTermination}, elapsed=${formatAbortElapsed()})`);
-                if ((signal === 'SIGTERM' || signal === 'SIGINT' || signal === 'SIGKILL') && opts.abort.aborted) {
-                    // Normal termination due to abort signal
-                    finalize();
-                } else if (signal) {
-                    finalize(new Error(`Process terminated with signal: ${signal}`));
-                } else {
-                    finalize();
-                }
-            });
+            }).then(r).catch(reject);
         });
     } finally {
         process.stdin.resume();
diff --git a/cli/src/codex/codexLocal.ts b/cli/src/codex/codexLocal.ts
index baa33595..dafc6ecb 100644
--- a/cli/src/codex/codexLocal.ts
+++ b/cli/src/codex/codexLocal.ts
@@ -1,7 +1,6 @@
-import { spawn } from 'node:child_process';
 import { logger } from '@/ui/logger';
 import { restoreTerminalState } from '@/ui/terminalState';
-import { killProcessByChildProcess } from '@/utils/process';
+import { spawnWithAbort } from '@/utils/spawnWithAbort';
 
 /**
  * Filter out 'resume' subcommand which is managed internally by hapi.
@@ -60,71 +59,17 @@ export async function codexLocal(opts: {
 
     process.stdin.pause();
     try {
-        await new Promise<void>((resolve, reject) => {
-            const child = spawn('codex', args, {
-                stdio: ['inherit', 'inherit', 'inherit'],
-                signal: opts.abort,
-                cwd: opts.path,
-                env: process.env
-            });
-
-            let abortKillTimeout: NodeJS.Timeout | null = null;
-            const abortHandler = () => {
-                if (abortKillTimeout) {
-                    return;
-                }
-                abortKillTimeout = setTimeout(() => {
-                    if (child.exitCode === null && !child.killed) {
-                        logger.debug('[CodexLocal] Abort timeout reached, sending SIGKILL');
-                        try {
-                            void killProcessByChildProcess(child, true);
-                        } catch (error) {
-                            logger.debug('[CodexLocal] Failed to send SIGKILL:', error);
-                        }
-                    }
-                }, 5000);
-            };
-
-            if (opts.abort.aborted) {
-                abortHandler();
-            } else {
-                opts.abort.addEventListener('abort', abortHandler);
-            }
-
-            const cleanupAbortHandler = () => {
-                if (abortKillTimeout) {
-                    clearTimeout(abortKillTimeout);
-                    abortKillTimeout = null;
-                }
-                opts.abort.removeEventListener('abort', abortHandler);
-            };
-
-            child.on('error', (error) => {
-                cleanupAbortHandler();
-                if (opts.abort.aborted) {
-                    resolve();
-                    return;
-                }
-                const message = error instanceof Error ? error.message : String(error);
-                reject(new Error(`Failed to spawn codex: ${message}. Is Codex CLI installed and on PATH?`, { cause: error }));
-            });
-
-            child.on('exit', (code, signal) => {
-                cleanupAbortHandler();
-                if (signal === 'SIGTERM' && opts.abort.aborted) {
-                    resolve();
-                    return;
-                }
-                if (signal) {
-                    reject(new Error(`Process terminated with signal: ${signal}`));
-                    return;
-                }
-                if (typeof code === 'number' && code !== 0) {
-                    reject(new Error(`Process exited with code: ${code}`));
-                    return;
-                }
-                resolve();
-            });
+        await spawnWithAbort({
+            command: 'codex',
+            args,
+            cwd: opts.path,
+            env: process.env,
+            signal: opts.abort,
+            logLabel: 'CodexLocal',
+            spawnName: 'codex',
+            installHint: 'Codex CLI',
+            includeCause: true,
+            logExit: true
         });
     } finally {
         process.stdin.resume();
diff --git a/cli/src/ui/terminalState.ts b/cli/src/ui/terminalState.ts
index 4a0c93ed..54160dab 100644
--- a/cli/src/ui/terminalState.ts
+++ b/cli/src/ui/terminalState.ts
@@ -2,6 +2,8 @@ export function restoreTerminalState(): void {
     if (process.stdout.isTTY) {
         // Disable kitty keyboard protocol / CSI u key release reporting if enabled.
         process.stdout.write('\x1b[>4;0m');
+        // Disable focus reporting to avoid stray ^[[I on mode switches.
+        process.stdout.write('\x1b[?1004l');
         process.stdout.write('\x1b[?2004l');
     }
     if (process.stdin.isTTY) {
diff --git a/cli/src/utils/spawnWithAbort.ts b/cli/src/utils/spawnWithAbort.ts
new file mode 100644
index 00000000..0b4462ff
--- /dev/null
+++ b/cli/src/utils/spawnWithAbort.ts
@@ -0,0 +1,133 @@
+import { spawn, type SpawnOptions, type StdioOptions } from 'node:child_process';
+import { logger } from '@/ui/logger';
+import { killProcessByChildProcess } from '@/utils/process';
+
+const DEFAULT_ABORT_EXIT_CODES = [130, 137, 143];
+const DEFAULT_ABORT_SIGNALS: NodeJS.Signals[] = ['SIGTERM'];
+
+const isAbortError = (error: unknown): boolean => {
+    if (!error || typeof error !== 'object') {
+        return false;
+    }
+    const maybeError = error as { name?: string; code?: string };
+    return maybeError.name === 'AbortError' || maybeError.code === 'ABORT_ERR';
+};
+
+export type SpawnWithAbortOptions = {
+    command: string;
+    args: string[];
+    cwd: string;
+    env: NodeJS.ProcessEnv;
+    signal: AbortSignal;
+    logLabel: string;
+    spawnName: string;
+    installHint: string;
+    abortKillTimeoutMs?: number;
+    abortExitCodes?: number[];
+    abortSignals?: NodeJS.Signals[];
+    includeCause?: boolean;
+    logExit?: boolean;
+    shell?: SpawnOptions['shell'];
+    stdio?: StdioOptions;
+};
+
+export async function spawnWithAbort(options: SpawnWithAbortOptions): Promise<void> {
+    const abortKillTimeoutMs = options.abortKillTimeoutMs ?? 5000;
+    const abortExitCodes = options.abortExitCodes ?? DEFAULT_ABORT_EXIT_CODES;
+    const abortSignals = options.abortSignals ?? DEFAULT_ABORT_SIGNALS;
+    const stdio = options.stdio ?? ['inherit', 'inherit', 'inherit'];
+    const logPrefix = options.logLabel ? `[${options.logLabel}] ` : '';
+
+    const logDebug = (message: string, ...args: unknown[]) => {
+        logger.debug(`${logPrefix}${message}`, ...args);
+    };
+
+    await new Promise<void>((resolve, reject) => {
+        const child = spawn(options.command, options.args, {
+            stdio,
+            signal: options.signal,
+            cwd: options.cwd,
+            env: options.env,
+            shell: options.shell
+        });
+
+        let abortKillTimeout: NodeJS.Timeout | null = null;
+
+        const abortHandler = () => {
+            if (abortKillTimeout) {
+                return;
+            }
+            abortKillTimeout = setTimeout(() => {
+                if (child.exitCode === null && !child.killed) {
+                    logDebug('Abort timeout reached, sending SIGKILL');
+                    try {
+                        void killProcessByChildProcess(child, true);
+                    } catch (error) {
+                        logDebug('Failed to send SIGKILL', error);
+                    }
+                }
+            }, abortKillTimeoutMs);
+        };
+
+        if (options.signal.aborted) {
+            abortHandler();
+        } else {
+            options.signal.addEventListener('abort', abortHandler);
+        }
+
+        const cleanupAbortHandler = () => {
+            if (abortKillTimeout) {
+                clearTimeout(abortKillTimeout);
+                abortKillTimeout = null;
+            }
+            options.signal.removeEventListener('abort', abortHandler);
+        };
+
+        child.on('error', (error) => {
+            cleanupAbortHandler();
+            if (options.signal.aborted && isAbortError(error)) {
+                logDebug('Spawn aborted while switching');
+                if (!child.pid) {
+                    resolve();
+                }
+                return;
+            }
+            if (options.signal.aborted) {
+                resolve();
+                return;
+            }
+            const message = error instanceof Error ? error.message : String(error);
+            const errorMessage = `Failed to spawn ${options.spawnName}: ${message}. ` +
+                `Is ${options.installHint} installed and on PATH?`;
+            if (options.includeCause) {
+                reject(new Error(errorMessage, { cause: error }));
+            } else {
+                reject(new Error(errorMessage));
+            }
+        });
+
+        child.on('exit', (code, signal) => {
+            cleanupAbortHandler();
+            if (options.logExit) {
+                logDebug(`Child exited (code=${code ?? 'null'}, signal=${signal ?? 'null'}, aborted=${options.signal.aborted})`);
+            }
+            if (options.signal.aborted && signal && abortSignals.includes(signal)) {
+                resolve();
+                return;
+            }
+            if (options.signal.aborted && typeof code === 'number' && abortExitCodes.includes(code)) {
+                resolve();
+                return;
+            }
+            if (signal) {
+                reject(new Error(`Process terminated with signal: ${signal}`));
+                return;
+            }
+            if (typeof code === 'number' && code !== 0) {
+                reject(new Error(`Process exited with code: ${code}`));
+                return;
+            }
+            resolve();
+        });
+    });
+}