diff --git a/src/providers/codex.test.ts b/src/providers/codex.test.ts
index a5acf5bd..b9070d60 100644
--- a/src/providers/codex.test.ts
+++ b/src/providers/codex.test.ts
@@ -906,6 +906,7 @@ Deno.test("codex provider skips sandbox config when yolo env is enabled", () =>
       cwd: "/tmp/test-cwd",
     });
     const joined = args.join(" ");
+    assertEquals(joined.includes("--yolo"), true);
     assertEquals(joined.includes('approval_policy="never"'), true);
     assertEquals(joined.includes('sandbox_mode="workspace-write"'), false);
     assertEquals(
@@ -921,6 +922,27 @@ Deno.test("codex provider skips sandbox config when yolo env is enabled", () =>
   }
 });
 
+Deno.test("codex provider skips sandbox config when additionalParams.codex.skip_sandbox_config is true", () => {
+  const args = parseCodexArgsForTest({
+    model: "codex-cli/default",
+    messages: [{ role: "user", content: "hi" }],
+    cwd: "/tmp/test-cwd",
+    params: {
+      codex: {
+        skip_sandbox_config: true,
+      },
+    },
+  });
+  const joined = args.join(" ");
+  assertEquals(joined.includes("--yolo"), true);
+  assertEquals(joined.includes('approval_policy="never"'), true);
+  assertEquals(joined.includes('sandbox_mode="workspace-write"'), false);
+  assertEquals(
+    joined.includes("sandbox_workspace_write.writable_roots"),
+    false,
+  );
+});
+
 Deno.test("codex provider omits MCP root deck env when deck path is absent", () => {
   const args = parseCodexArgsForTest({
     model: "codex-cli/default",
diff --git a/src/providers/codex.ts b/src/providers/codex.ts
index 42be1821..23ff40c3 100644
--- a/src/providers/codex.ts
+++ b/src/providers/codex.ts
@@ -120,6 +120,11 @@ function shouldSkipCodexSandboxConfig(
 ): boolean {
   const yolo = params?.gambitYolo;
   if (typeof yolo === "boolean") return yolo;
+  const codex = asRecord(params?.codex);
+  const codexSkipSandboxConfig = codex.skip_sandbox_config;
+  if (typeof codexSkipSandboxConfig === "boolean") {
+    return codexSkipSandboxConfig;
+  }
   const envRaw = Deno.env.get(CODEX_SKIP_SANDBOX_CONFIG_ENV);
   return Boolean(envRaw && parseTruthy(envRaw));
 }
@@ -1154,6 +1159,7 @@ export function createCodexProvider(opts?: {
       priorThreadId,
     });
     const cwd = runCwd();
+    const skipSandboxConfig = shouldSkipCodexSandboxConfig(input.params);
     const args = priorThreadId
       ? [
         "exec",
@@ -1162,6 +1168,9 @@ export function createCodexProvider(opts?: {
         "--json",
       ]
       : ["exec", "--skip-git-repo-check", "--json"];
+    if (skipSandboxConfig) {
+      args.push("--yolo");
+    }
     args.push(
       ...codexConfigArgs({
         cwd,
@@ -1410,9 +1419,13 @@ export function parseCodexArgsForTest(input: {
     messages: input.messages,
     priorThreadId,
   });
+  const skipSandboxConfig = shouldSkipCodexSandboxConfig(input.params);
   const args = priorThreadId
     ? ["exec", "resume", "--skip-git-repo-check", "--json"]
     : ["exec", "--skip-git-repo-check", "--json"];
+  if (skipSandboxConfig) {
+    args.push("--yolo");
+  }
   args.push(
     ...codexConfigArgs({
       cwd: input.cwd ?? runCwd(),