diff --git a/src/infra/exec-approval-command-display.test.ts b/src/infra/exec-approval-command-display.test.ts
new file mode 100644
index 00000000000..9fefeec1aed
--- /dev/null
+++ b/src/infra/exec-approval-command-display.test.ts
@@ -0,0 +1,66 @@
+import { describe, expect, it } from "vitest";
+import {
+  resolveExecApprovalCommandDisplay,
+  sanitizeExecApprovalDisplayText,
+} from "./exec-approval-command-display.js";
+
+describe("sanitizeExecApprovalDisplayText", () => {
+  it("escapes unicode format characters but leaves other text intact", () => {
+    expect(sanitizeExecApprovalDisplayText("echo hi\u200Bthere")).toBe("echo hi\\u{200B}there");
+  });
+});
+
+describe("resolveExecApprovalCommandDisplay", () => {
+  it("prefers explicit command fields and drops identical previews after trimming", () => {
+    expect(
+      resolveExecApprovalCommandDisplay({
+        command: "echo hi",
+        commandPreview: "  echo hi  ",
+        host: "gateway",
+      }),
+    ).toEqual({
+      commandText: "echo hi",
+      commandPreview: null,
+    });
+  });
+
+  it("falls back to node systemRunPlan values and sanitizes preview text", () => {
+    expect(
+      resolveExecApprovalCommandDisplay({
+        command: "",
+        host: "node",
+        systemRunPlan: {
+          argv: ["python3", "-c", "print(1)"],
+          cwd: null,
+          commandText: 'python3 -c "print(1)"',
+          commandPreview: "print\u200B(1)",
+          agentId: null,
+          sessionKey: null,
+        },
+      }),
+    ).toEqual({
+      commandText: 'python3 -c "print(1)"',
+      commandPreview: "print\\u{200B}(1)",
+    });
+  });
+
+  it("ignores systemRunPlan fallback for non-node hosts", () => {
+    expect(
+      resolveExecApprovalCommandDisplay({
+        command: "",
+        host: "sandbox",
+        systemRunPlan: {
+          argv: ["echo", "hi"],
+          cwd: null,
+          commandText: "echo hi",
+          commandPreview: "echo hi",
+          agentId: null,
+          sessionKey: null,
+        },
+      }),
+    ).toEqual({
+      commandText: "",
+      commandPreview: null,
+    });
+  });
+});
diff --git a/src/infra/openclaw-exec-env.test.ts b/src/infra/openclaw-exec-env.test.ts
new file mode 100644
index 00000000000..488fa1dd5ef
--- /dev/null
+++ b/src/infra/openclaw-exec-env.test.ts
@@ -0,0 +1,30 @@
+import { describe, expect, it } from "vitest";
+import {
+  ensureOpenClawExecMarkerOnProcess,
+  markOpenClawExecEnv,
+  OPENCLAW_CLI_ENV_VALUE,
+  OPENCLAW_CLI_ENV_VAR,
+} from "./openclaw-exec-env.js";
+
+describe("markOpenClawExecEnv", () => {
+  it("returns a cloned env object with the exec marker set", () => {
+    const env = { PATH: "/usr/bin", OPENCLAW_CLI: "0" };
+    const marked = markOpenClawExecEnv(env);
+
+    expect(marked).toEqual({
+      PATH: "/usr/bin",
+      OPENCLAW_CLI: OPENCLAW_CLI_ENV_VALUE,
+    });
+    expect(marked).not.toBe(env);
+    expect(env.OPENCLAW_CLI).toBe("0");
+  });
+});
+
+describe("ensureOpenClawExecMarkerOnProcess", () => {
+  it("mutates and returns the provided process env", () => {
+    const env: NodeJS.ProcessEnv = { PATH: "/usr/bin" };
+
+    expect(ensureOpenClawExecMarkerOnProcess(env)).toBe(env);
+    expect(env[OPENCLAW_CLI_ENV_VAR]).toBe(OPENCLAW_CLI_ENV_VALUE);
+  });
+});
diff --git a/src/infra/shell-inline-command.test.ts b/src/infra/shell-inline-command.test.ts
new file mode 100644
index 00000000000..8ac552f9fee
--- /dev/null
+++ b/src/infra/shell-inline-command.test.ts
@@ -0,0 +1,65 @@
+import { describe, expect, it } from "vitest";
+import {
+  POSIX_INLINE_COMMAND_FLAGS,
+  POWERSHELL_INLINE_COMMAND_FLAGS,
+  resolveInlineCommandMatch,
+} from "./shell-inline-command.js";
+
+describe("resolveInlineCommandMatch", () => {
+  it("extracts the next token for exact inline-command flags", () => {
+    expect(
+      resolveInlineCommandMatch(["bash", "-lc", "echo hi"], POSIX_INLINE_COMMAND_FLAGS),
+    ).toEqual({
+      command: "echo hi",
+      valueTokenIndex: 2,
+    });
+    expect(
+      resolveInlineCommandMatch(
+        ["pwsh", "-Command", "Get-ChildItem"],
+        POWERSHELL_INLINE_COMMAND_FLAGS,
+      ),
+    ).toEqual({
+      command: "Get-ChildItem",
+      valueTokenIndex: 2,
+    });
+  });
+
+  it("supports combined -c forms only when enabled", () => {
+    expect(
+      resolveInlineCommandMatch(["sh", "-cecho hi"], POSIX_INLINE_COMMAND_FLAGS, {
+        allowCombinedC: true,
+      }),
+    ).toEqual({
+      command: "echo hi",
+      valueTokenIndex: 1,
+    });
+    expect(
+      resolveInlineCommandMatch(["sh", "-cecho hi"], POSIX_INLINE_COMMAND_FLAGS, {
+        allowCombinedC: false,
+      }),
+    ).toEqual({
+      command: null,
+      valueTokenIndex: null,
+    });
+  });
+
+  it("returns a value index even when the flag is present without a usable command", () => {
+    expect(resolveInlineCommandMatch(["bash", "-lc", "   "], POSIX_INLINE_COMMAND_FLAGS)).toEqual({
+      command: null,
+      valueTokenIndex: 2,
+    });
+    expect(resolveInlineCommandMatch(["bash", "-lc"], POSIX_INLINE_COMMAND_FLAGS)).toEqual({
+      command: null,
+      valueTokenIndex: null,
+    });
+  });
+
+  it("stops parsing after --", () => {
+    expect(
+      resolveInlineCommandMatch(["bash", "--", "-lc", "echo hi"], POSIX_INLINE_COMMAND_FLAGS),
+    ).toEqual({
+      command: null,
+      valueTokenIndex: null,
+    });
+  });
+});
diff --git a/src/infra/supervisor-markers.test.ts b/src/infra/supervisor-markers.test.ts
new file mode 100644
index 00000000000..fb49ec6eaf5
--- /dev/null
+++ b/src/infra/supervisor-markers.test.ts
@@ -0,0 +1,67 @@
+import { describe, expect, it } from "vitest";
+import { detectRespawnSupervisor, SUPERVISOR_HINT_ENV_VARS } from "./supervisor-markers.js";
+
+describe("SUPERVISOR_HINT_ENV_VARS", () => {
+  it("includes the cross-platform supervisor hint env vars", () => {
+    expect(SUPERVISOR_HINT_ENV_VARS).toEqual(
+      expect.arrayContaining([
+        "LAUNCH_JOB_LABEL",
+        "INVOCATION_ID",
+        "OPENCLAW_WINDOWS_TASK_NAME",
+        "OPENCLAW_SERVICE_MARKER",
+        "OPENCLAW_SERVICE_KIND",
+      ]),
+    );
+  });
+});
+
+describe("detectRespawnSupervisor", () => {
+  it("detects launchd and systemd only from non-blank platform-specific hints", () => {
+    expect(detectRespawnSupervisor({ LAUNCH_JOB_LABEL: " ai.openclaw.gateway " }, "darwin")).toBe(
+      "launchd",
+    );
+    expect(detectRespawnSupervisor({ LAUNCH_JOB_LABEL: "   " }, "darwin")).toBeNull();
+
+    expect(detectRespawnSupervisor({ INVOCATION_ID: "abc123" }, "linux")).toBe("systemd");
+    expect(detectRespawnSupervisor({ JOURNAL_STREAM: "" }, "linux")).toBeNull();
+  });
+
+  it("detects scheduled-task supervision on Windows from either hint family", () => {
+    expect(
+      detectRespawnSupervisor({ OPENCLAW_WINDOWS_TASK_NAME: "OpenClaw Gateway" }, "win32"),
+    ).toBe("schtasks");
+    expect(
+      detectRespawnSupervisor(
+        {
+          OPENCLAW_SERVICE_MARKER: "openclaw",
+          OPENCLAW_SERVICE_KIND: "gateway",
+        },
+        "win32",
+      ),
+    ).toBe("schtasks");
+    expect(
+      detectRespawnSupervisor(
+        {
+          OPENCLAW_SERVICE_MARKER: "openclaw",
+          OPENCLAW_SERVICE_KIND: "worker",
+        },
+        "win32",
+      ),
+    ).toBeNull();
+  });
+
+  it("ignores service markers on non-Windows platforms and unknown platforms", () => {
+    expect(
+      detectRespawnSupervisor(
+        {
+          OPENCLAW_SERVICE_MARKER: "openclaw",
+          OPENCLAW_SERVICE_KIND: "gateway",
+        },
+        "linux",
+      ),
+    ).toBeNull();
+    expect(
+      detectRespawnSupervisor({ LAUNCH_JOB_LABEL: "ai.openclaw.gateway" }, "freebsd"),
+    ).toBeNull();
+  });
+});