diff --git a/src/main/services/infrastructure/OpenCodeRuntimeInstallerService.ts b/src/main/services/infrastructure/OpenCodeRuntimeInstallerService.ts
index fef3a0cb..7d2bbf49 100644
--- a/src/main/services/infrastructure/OpenCodeRuntimeInstallerService.ts
+++ b/src/main/services/infrastructure/OpenCodeRuntimeInstallerService.ts
@@ -27,6 +27,10 @@ const MAX_TARBALL_BYTES = 250 * 1024 * 1024;
 const MAX_BINARY_BYTES = 350 * 1024 * 1024;
 const FETCH_TIMEOUT_MS = 60_000;
 const VERSION_TIMEOUT_MS = 10_000;
+const VERSION_PROBE_SUCCESS_CACHE_TTL_MS = 30_000;
+const VERSION_PROBE_FAILURE_CACHE_TTL_MS = 5_000;
+const RUNTIME_STATUS_SUCCESS_CACHE_TTL_MS = 30_000;
+const RUNTIME_STATUS_FAILURE_CACHE_TTL_MS = 5_000;
 
 interface NpmPackageMetadata {
   name?: string;
@@ -97,15 +101,8 @@ export async function resolveVerifiedAppManagedOpenCodeRuntimeBinaryPath(): Prom
   if (!binaryPath) {
     return null;
   }
-  try {
-    await execCli(binaryPath, ['--version'], {
-      timeout: VERSION_TIMEOUT_MS,
-      windowsHide: true,
-    });
-    return binaryPath;
-  } catch {
-    return null;
-  }
+  const version = await probeOpenCodeBinaryVersionCached(binaryPath);
+  return version.ok ? binaryPath : null;
 }
 
 function getExecutableName(): string {
@@ -173,6 +170,31 @@ type VerifiedOpenCodeBinaryProbe =
   | { ok: true; binaryPath: string; version: string | null }
   | { ok: false; firstFailure: { binaryPath: string; error: string } | null };
 
+interface CachedVersionProbe {
+  result: OpenCodeBinaryVersionProbe;
+  cachedAt: number;
+  ttlMs: number;
+}
+
+interface CachedPathProbe {
+  result: VerifiedOpenCodeBinaryProbe;
+  cachedAt: number;
+  ttlMs: number;
+}
+
+interface CachedRuntimeBinaryResolve {
+  binaryPath: string | null;
+  cachedAt: number;
+  ttlMs: number;
+}
+
+const versionProbeCache = new Map<string, CachedVersionProbe>();
+const versionProbeInFlight = new Map<string, Promise<OpenCodeBinaryVersionProbe>>();
+const pathProbeCache = new Map<string, CachedPathProbe>();
+const pathProbeInFlight = new Map<string, Promise<VerifiedOpenCodeBinaryProbe>>();
+const runtimeBinaryResolveCache = new Map<string, CachedRuntimeBinaryResolve>();
+const runtimeBinaryResolveInFlight = new Map<string, Promise<string | null>>();
+
 async function probeOpenCodeBinaryVersion(binaryPath: string): Promise<OpenCodeBinaryVersionProbe> {
   try {
     const { stdout } = await execCli(binaryPath, ['--version'], {
@@ -190,6 +212,42 @@ function normalizeBinaryCandidateForCompare(binaryPath: string): string {
   return process.platform === 'win32' ? normalized.toLowerCase() : normalized;
 }
 
+function getVersionProbeTtlMs(result: OpenCodeBinaryVersionProbe): number {
+  return result.ok ? VERSION_PROBE_SUCCESS_CACHE_TTL_MS : VERSION_PROBE_FAILURE_CACHE_TTL_MS;
+}
+
+async function probeOpenCodeBinaryVersionCached(
+  binaryPath: string
+): Promise<OpenCodeBinaryVersionProbe> {
+  const cacheKey = normalizeBinaryCandidateForCompare(binaryPath);
+  const cached = versionProbeCache.get(cacheKey);
+  if (cached && Date.now() - cached.cachedAt < cached.ttlMs) {
+    return cached.result;
+  }
+
+  const inFlight = versionProbeInFlight.get(cacheKey);
+  if (inFlight) {
+    return inFlight;
+  }
+
+  const request = probeOpenCodeBinaryVersion(binaryPath)
+    .then((result) => {
+      versionProbeCache.set(cacheKey, {
+        result,
+        cachedAt: Date.now(),
+        ttlMs: getVersionProbeTtlMs(result),
+      });
+      return result;
+    })
+    .finally(() => {
+      if (versionProbeInFlight.get(cacheKey) === request) {
+        versionProbeInFlight.delete(cacheKey);
+      }
+    });
+  versionProbeInFlight.set(cacheKey, request);
+  return request;
+}
+
 async function probeFirstWorkingOpenCodeBinaryCandidate(
   candidates: string[],
   seen: Set<string>,
@@ -202,7 +260,7 @@ async function probeFirstWorkingOpenCodeBinaryCandidate(
       continue;
     }
     seen.add(normalized);
-    const version = await probeOpenCodeBinaryVersion(binaryPath);
+    const version = await probeOpenCodeBinaryVersionCached(binaryPath);
     if (version.ok) {
       return { ok: true, binaryPath, version: version.version };
     }
@@ -217,6 +275,22 @@ interface OpenCodeRuntimeBinaryResolveOptions {
   includeShellEnv?: boolean;
 }
 
+function getPathProbeCacheKey(options: OpenCodeRuntimeBinaryResolveOptions = {}): string {
+  if (options.includeShellEnv === false) {
+    return 'no-shell-env';
+  }
+
+  return `shell-env:${options.shellEnvTimeoutMs ?? RUNTIME_PATH_SHELL_ENV_TIMEOUT_MS}`;
+}
+
+function getPathProbeTtlMs(result: VerifiedOpenCodeBinaryProbe): number {
+  return result.ok ? VERSION_PROBE_SUCCESS_CACHE_TTL_MS : VERSION_PROBE_FAILURE_CACHE_TTL_MS;
+}
+
+function getRuntimeBinaryResolveTtlMs(binaryPath: string | null): number {
+  return binaryPath ? VERSION_PROBE_SUCCESS_CACHE_TTL_MS : VERSION_PROBE_FAILURE_CACHE_TTL_MS;
+}
+
 async function probeFirstWorkingPathOpenCodeBinary(
   options: OpenCodeRuntimeBinaryResolveOptions = {}
 ): Promise<VerifiedOpenCodeBinaryProbe> {
@@ -268,20 +342,86 @@ async function probeFirstWorkingPathOpenCodeBinary(
   );
 }
 
+async function probeFirstWorkingPathOpenCodeBinaryCached(
+  options: OpenCodeRuntimeBinaryResolveOptions = {}
+): Promise<VerifiedOpenCodeBinaryProbe> {
+  const cacheKey = getPathProbeCacheKey(options);
+  const cached = pathProbeCache.get(cacheKey);
+  if (cached && Date.now() - cached.cachedAt < cached.ttlMs) {
+    return cached.result;
+  }
+
+  const inFlight = pathProbeInFlight.get(cacheKey);
+  if (inFlight) {
+    return inFlight;
+  }
+
+  const request = probeFirstWorkingPathOpenCodeBinary(options)
+    .then((result) => {
+      pathProbeCache.set(cacheKey, {
+        result,
+        cachedAt: Date.now(),
+        ttlMs: getPathProbeTtlMs(result),
+      });
+      return result;
+    })
+    .finally(() => {
+      if (pathProbeInFlight.get(cacheKey) === request) {
+        pathProbeInFlight.delete(cacheKey);
+      }
+    });
+  pathProbeInFlight.set(cacheKey, request);
+  return request;
+}
+
 async function resolveVerifiedPathOpenCodeBinaryPath(
   options: OpenCodeRuntimeBinaryResolveOptions = {}
 ): Promise<string | null> {
-  const result = await probeFirstWorkingPathOpenCodeBinary(options);
+  const result = await probeFirstWorkingPathOpenCodeBinaryCached(options);
   return result.ok ? result.binaryPath : null;
 }
 
+export function clearOpenCodeRuntimeBinaryResolverCache(): void {
+  versionProbeCache.clear();
+  versionProbeInFlight.clear();
+  pathProbeCache.clear();
+  pathProbeInFlight.clear();
+  runtimeBinaryResolveCache.clear();
+  runtimeBinaryResolveInFlight.clear();
+}
+
 export async function resolveVerifiedOpenCodeRuntimeBinaryPath(
   options: OpenCodeRuntimeBinaryResolveOptions = {}
 ): Promise<string | null> {
-  return (
+  const cacheKey = getPathProbeCacheKey(options);
+  const cached = runtimeBinaryResolveCache.get(cacheKey);
+  if (cached && Date.now() - cached.cachedAt < cached.ttlMs) {
+    return cached.binaryPath;
+  }
+
+  const inFlight = runtimeBinaryResolveInFlight.get(cacheKey);
+  if (inFlight) {
+    return inFlight;
+  }
+
+  const request = (async () =>
     (await resolveVerifiedAppManagedOpenCodeRuntimeBinaryPath()) ??
-    (await resolveVerifiedPathOpenCodeBinaryPath(options))
-  );
+    (await resolveVerifiedPathOpenCodeBinaryPath(options)))()
+    .then((binaryPath) => {
+      runtimeBinaryResolveCache.set(cacheKey, {
+        binaryPath,
+        cachedAt: Date.now(),
+        ttlMs: getRuntimeBinaryResolveTtlMs(binaryPath),
+      });
+      return binaryPath;
+    })
+    .finally(() => {
+      if (runtimeBinaryResolveInFlight.get(cacheKey) === request) {
+        runtimeBinaryResolveInFlight.delete(cacheKey);
+      }
+    });
+  runtimeBinaryResolveInFlight.set(cacheKey, request);
+  return request;
 }
 
 function isLinuxMuslRuntime(): boolean {
@@ -511,6 +651,8 @@ export class OpenCodeRuntimeInstallerService {
   private mainWindow: BrowserWindow | null = null;
   private installPromise: Promise<OpenCodeRuntimeStatus> | null = null;
   private latestStatus: OpenCodeRuntimeStatus | null = null;
+  private latestStatusAt = 0;
+  private statusPromise: Promise<OpenCodeRuntimeStatus> | null = null;
 
   setMainWindow(win: BrowserWindow | null): void {
     this.mainWindow = win;
@@ -518,16 +660,40 @@ export class OpenCodeRuntimeInstallerService {
 
   invalidateStatusCache(): void {
     this.latestStatus = null;
+    this.latestStatusAt = 0;
+    this.statusPromise = null;
+    clearOpenCodeRuntimeBinaryResolverCache();
   }
 
   async getStatus(): Promise<OpenCodeRuntimeStatus> {
     if (this.installPromise && this.latestStatus) {
       return this.latestStatus;
     }
+    if (this.installPromise) {
+      return this.installPromise;
+    }
 
+    if (this.latestStatus && Date.now() - this.latestStatusAt < this.getStatusCacheTtlMs()) {
+      return this.latestStatus;
+    }
+
+    if (this.statusPromise) {
+      return this.statusPromise;
+    }
+
+    const request = this.resolveStatus().finally(() => {
+      if (this.statusPromise === request) {
+        this.statusPromise = null;
+      }
+    });
+    this.statusPromise = request;
+    return request;
+  }
+
+  private async resolveStatus(): Promise<OpenCodeRuntimeStatus> {
     const appManagedStatus = await this.getAppManagedStatus();
     if (appManagedStatus.installed) {
-      this.latestStatus = appManagedStatus;
+      this.rememberStatus(appManagedStatus);
       return appManagedStatus;
     }
 
@@ -538,7 +704,7 @@ export class OpenCodeRuntimeInstallerService {
       appManagedStatus.state !== 'failed'
         ? pathStatus
         : appManagedStatus;
-    this.latestStatus = status;
+    this.rememberStatus(status);
     return status;
   }
 
@@ -553,10 +719,21 @@ export class OpenCodeRuntimeInstallerService {
   }
 
   private publish(status: OpenCodeRuntimeStatus): void {
-    this.latestStatus = status;
+    this.rememberStatus(status);
     safeSendToRenderer(this.mainWindow, CHANNEL, status);
   }
 
+  private rememberStatus(status: OpenCodeRuntimeStatus): void {
+    this.latestStatus = status;
+    this.latestStatusAt = Date.now();
+  }
+
+  private getStatusCacheTtlMs(): number {
+    return this.latestStatus?.installed === true
+      ? RUNTIME_STATUS_SUCCESS_CACHE_TTL_MS
+      : RUNTIME_STATUS_FAILURE_CACHE_TTL_MS;
+  }
+
   private publishProgress(progress: OpenCodeRuntimeInstallProgress): void {
     this.publish({
       installed: false,
@@ -571,32 +748,28 @@ export class OpenCodeRuntimeInstallerService {
     if (!isAbsoluteExistingFile(manifest?.binaryPath)) {
       return { installed: false, source: 'missing', state: 'idle' };
     }
-    try {
-      const { stdout } = await execCli(manifest.binaryPath, ['--version'], {
-        timeout: VERSION_TIMEOUT_MS,
-        windowsHide: true,
-      });
+    const version = await probeOpenCodeBinaryVersionCached(manifest.binaryPath);
+    if (version.ok) {
       return {
         installed: true,
         binaryPath: manifest.binaryPath,
-        version: stdout.trim() || manifest.version,
+        version: version.version ?? manifest.version,
         source: 'app-managed',
         state: 'ready',
       };
-    } catch (error) {
-      return {
-        installed: false,
-        binaryPath: manifest.binaryPath,
-        version: manifest.version,
-        source: 'app-managed',
-        state: 'failed',
-        error: getErrorMessage(error),
-      };
     }
+    return {
+      installed: false,
+      binaryPath: manifest.binaryPath,
+      version: manifest.version,
+      source: 'app-managed',
+      state: 'failed',
+      error: version.error,
+    };
   }
 
   private async getPathStatus(): Promise<OpenCodeRuntimeStatus> {
-    const result = await probeFirstWorkingPathOpenCodeBinary();
+    const result = await probeFirstWorkingPathOpenCodeBinaryCached();
     if (result.ok) {
       return {
         installed: true,
@@ -687,6 +860,7 @@ export class OpenCodeRuntimeInstallerService {
         `${JSON.stringify(manifest, null, 2)}\n`,
         'utf8'
       );
+      clearOpenCodeRuntimeBinaryResolverCache();
 
       const status: OpenCodeRuntimeStatus = {
         installed: true,
diff --git a/test/main/services/infrastructure/OpenCodeRuntimeInstallerService.test.ts b/test/main/services/infrastructure/OpenCodeRuntimeInstallerService.test.ts
index 563d6e49..4a93dbba 100644
--- a/test/main/services/infrastructure/OpenCodeRuntimeInstallerService.test.ts
+++ b/test/main/services/infrastructure/OpenCodeRuntimeInstallerService.test.ts
@@ -28,6 +28,7 @@ vi.mock('@main/utils/shellEnv', () => ({
 }));
 
 import {
+  clearOpenCodeRuntimeBinaryResolverCache,
   extractOpenCodeRuntimeBinaryFromTarball,
   getOpenCodeRuntimePlatformCandidates,
   OpenCodeRuntimeInstallerService,
@@ -41,6 +42,20 @@ import { setAppDataBasePath } from '@main/utils/pathDecoder';
 let tempRoot: string | null = null;
 let originalPath: string | undefined;
 
+function deferred<T>(): {
+  promise: Promise<T>;
+  resolve: (value: T) => void;
+  reject: (error: unknown) => void;
+} {
+  let resolve!: (value: T) => void;
+  let reject!: (error: unknown) => void;
+  const promise = new Promise<T>((promiseResolve, promiseReject) => {
+    resolve = promiseResolve;
+    reject = promiseReject;
+  });
+  return { promise, resolve, reject };
+}
+
 function writeOctal(header: Buffer, offset: number, length: number, value: number): void {
   const encoded = value
     .toString(8)
@@ -84,6 +99,7 @@ describe('OpenCodeRuntimeInstallerService resolver', () => {
     setAppDataBasePath(tempRoot);
     originalPath = process.env.PATH;
     process.env.PATH = '';
+    clearOpenCodeRuntimeBinaryResolverCache();
     execCliMock.mockReset();
     execCliMock.mockResolvedValue({ stdout: 'opencode 1.0.0\n', stderr: '' });
     buildMergedCliPathMock.mockReset();
@@ -97,6 +113,7 @@ describe('OpenCodeRuntimeInstallerService resolver', () => {
   });
 
   afterEach(async () => {
+    clearOpenCodeRuntimeBinaryResolverCache();
     setAppDataBasePath(null);
     if (originalPath === undefined) {
       delete process.env.PATH;
@@ -194,11 +211,53 @@ describe('OpenCodeRuntimeInstallerService resolver', () => {
       windowsHide: true,
     });
 
+    clearOpenCodeRuntimeBinaryResolverCache();
     execCliMock.mockRejectedValueOnce(new Error('broken binary'));
 
     await expect(resolveVerifiedAppManagedOpenCodeRuntimeBinaryPath()).resolves.toBeNull();
   });
 
+  it('coalesces concurrent app-managed OpenCode verification probes', async () => {
+    const binaryPath = path.join(
+      tempRoot!,
+      'data',
+      'runtimes',
+      'opencode',
+      'versions',
+      '1.0.0',
+      'opencode-test',
+      'opencode'
+    );
+    const manifestPath = path.join(tempRoot!, 'data', 'runtimes', 'opencode', 'current.json');
+    await mkdir(path.dirname(binaryPath), { recursive: true });
+    await mkdir(path.dirname(manifestPath), { recursive: true });
+    await writeFile(binaryPath, 'binary', { mode: 0o755 });
+    await writeFile(
+      manifestPath,
+      `${JSON.stringify({
+        schemaVersion: 1,
+        version: '1.0.0',
+        platformPackage: 'opencode-test',
+        binaryPath,
+        integrity: 'sha512-test',
+        installedAt: '2026-05-12T00:00:00.000Z',
+      })}\n`,
+      'utf8'
+    );
+    const versionProbe = deferred<{ stdout: string; stderr: string }>();
+    execCliMock.mockReturnValue(versionProbe.promise);
+
+    const first = resolveVerifiedAppManagedOpenCodeRuntimeBinaryPath();
+    const second = resolveVerifiedAppManagedOpenCodeRuntimeBinaryPath();
+    await vi.waitFor(() => expect(execCliMock).toHaveBeenCalledTimes(1));
+
+    versionProbe.resolve({ stdout: 'opencode 1.0.0\n', stderr: '' });
+    await expect(Promise.all([first, second])).resolves.toEqual([binaryPath, binaryPath]);
+
+    await expect(resolveVerifiedAppManagedOpenCodeRuntimeBinaryPath()).resolves.toBe(binaryPath);
+    expect(execCliMock).toHaveBeenCalledTimes(1);
+  });
+
   it('returns a verified OpenCode binary from best-effort shell PATH when app-managed runtime is absent', async () => {
     const binaryPath = path.join(tempRoot!, 'homebrew', 'bin', 'opencode');
     await mkdir(path.dirname(binaryPath), { recursive: true });
@@ -222,6 +281,61 @@ describe('OpenCodeRuntimeInstallerService resolver', () => {
     });
   });
 
+  it('coalesces concurrent verified OpenCode PATH probes and reuses the warm result', async () => {
+    const binaryPath = path.join(tempRoot!, 'homebrew', 'bin', 'opencode');
+    await mkdir(path.dirname(binaryPath), { recursive: true });
+    await writeFile(binaryPath, 'binary', { mode: 0o755 });
+    resolveInteractiveShellEnvBestEffortMock.mockResolvedValue({
+      PATH: path.dirname(binaryPath),
+    });
+    getShellPreferredHomeMock.mockReturnValue(tempRoot!);
+    const versionProbe = deferred<{ stdout: string; stderr: string }>();
+    execCliMock.mockReturnValue(versionProbe.promise);
+
+    const first = resolveVerifiedOpenCodeRuntimeBinaryPath({ shellEnvTimeoutMs: 0 });
+    const second = resolveVerifiedOpenCodeRuntimeBinaryPath({ shellEnvTimeoutMs: 0 });
+    await vi.waitFor(() => expect(execCliMock).toHaveBeenCalledTimes(1));
+
+    versionProbe.resolve({ stdout: 'opencode 1.0.0\n', stderr: '' });
+    await expect(Promise.all([first, second])).resolves.toEqual([binaryPath, binaryPath]);
+
+    await expect(resolveVerifiedOpenCodeRuntimeBinaryPath({ shellEnvTimeoutMs: 0 })).resolves.toBe(
+      binaryPath
+    );
+    expect(execCliMock).toHaveBeenCalledTimes(1);
+    expect(resolveInteractiveShellEnvBestEffortMock).toHaveBeenCalledTimes(1);
+  });
+
+  it('coalesces concurrent OpenCode runtime status checks and serves a short warm cache', async () => {
+    const binaryPath = path.join(tempRoot!, 'homebrew', 'bin', 'opencode');
+    await mkdir(path.dirname(binaryPath), { recursive: true });
+    await writeFile(binaryPath, 'binary', { mode: 0o755 });
+    resolveInteractiveShellEnvBestEffortMock.mockResolvedValue({
+      PATH: path.dirname(binaryPath),
+    });
+    getShellPreferredHomeMock.mockReturnValue(tempRoot!);
+    const versionProbe = deferred<{ stdout: string; stderr: string }>();
+    execCliMock.mockReturnValue(versionProbe.promise);
+    const service = new OpenCodeRuntimeInstallerService();
+
+    const first = service.getStatus();
+    const second = service.getStatus();
+    await vi.waitFor(() => expect(execCliMock).toHaveBeenCalledTimes(1));
+
+    versionProbe.resolve({ stdout: 'opencode 1.0.0\n', stderr: '' });
+    await expect(Promise.all([first, second])).resolves.toMatchObject([
+      { installed: true, source: 'path', binaryPath },
+      { installed: true, source: 'path', binaryPath },
+    ]);
+
+    await expect(service.getStatus()).resolves.toMatchObject({
+      installed: true,
+      source: 'path',
+      binaryPath,
+    });
+    expect(execCliMock).toHaveBeenCalledTimes(1);
+  });
+
   it('returns a verified OpenCode binary from the merged CLI PATH after zero-wait shell fallback', async () => {
     const binaryPath = path.join(tempRoot!, 'merged-cli-path', 'bin', 'opencode');
     await mkdir(path.dirname(binaryPath), { recursive: true });