Permission Modes for Host Exec, Codex Guardian, and ACPX Sessions
This page explains permission modes that control agent authority for host commands, file writes, and backend harness access. It covers recommended defaults and the OpenClaw host exec modes for coding agents.
Read this when
- Choosing auto, ask, allowlist, full, or deny for command permissions
- Configuring Codex Guardian-reviewed approvals through tools.exec.mode
- Comparing OpenClaw exec approvals with ACPX harness permissions
Permission modes control how much authority an agent has before it runs host commands, writes files, or requests additional access from a backend harness.
Note
Permission mode is separate from
tools.exec.host=auto.tools.exec.hostdetermines where a command executes.tools.exec.modedetermines how host execution is approved.
Recommended default
Use auto for coding agents that require practical host access without prompting a human on every miss:
openclaw config set tools.exec.mode auto
openclaw approvals get
openclaw gateway restart
Then confirm the effective policy:
openclaw exec-policy show
OpenClaw host exec modes
tools.exec.mode is the normalized policy surface for host exec. Each mode resolves to an underlying security (allowlist strictness) and ask (prompt-on-miss) pair:
| Mode | security / ask | Behavior | Use when |
|---|---|---|---|
deny | deny / off | Block host execution entirely. | No host commands are permitted. |
allowlist | allowlist / off | Execute only allowlisted commands; silently reject misses. | You have a known-safe command set. |
ask | allowlist / on-miss | Execute allowlist matches; prompt a human on misses. | A human should review each new command. |
auto | allowlist / on-miss | Execute allowlist matches; send misses through auto-review before falling back to human approval. | Coding sessions need practical guarded access. |
full | full / off | Execute host commands without prompts. | This trusted host or session should skip approval gates. |
ask and auto share the same allowlist and ask settings; auto additionally enables the native auto-reviewer, which decides misses on its own and only falls back to the configured human approval route when it cannot safely approve.
For the full host execution policy, local approvals file, allowlist schema, safe binaries, and forwarding behavior, see Exec approvals.
Codex Guardian mapping
For native Codex app-server sessions, tools.exec.mode: "auto" drives Codex toward Guardian-reviewed approvals when local Codex requirements allow it. Typical resulting values:
| Codex field | Typical value |
|---|---|
approvalPolicy | on-request |
approvalsReviewer | auto_review |
sandbox | workspace-write |
auto mode forces this policy over any configured Codex sandbox or approval overrides, so it does not preserve legacy unsafe combinations such as approvalPolicy: "never" with sandbox: "danger-full-access". tools.exec.mode: "deny" and "allowlist" block Codex app-server local execution entirely. Use tools.exec.mode: "full" only when you intentionally want the no-approval posture.
For app-server setup, auth order, and native Codex runtime details, see Codex harness.
ACPX harness permissions
ACPX sessions are non-interactive, so they cannot respond to a TTY permission prompt. ACPX uses separate harness-level settings under plugins.entries.acpx.config:
| Setting | Values | Meaning |
|---|---|---|
permissionMode | approve-reads | Auto-approve reads only. |
permissionMode | approve-all | Auto-approve writes and shell commands. |
permissionMode | deny-all | Deny all permission prompts. |
nonInteractivePermissions | fail | Abort when a prompt would be required. |
nonInteractivePermissions | deny | Deny the prompt and continue when possible. |
Set ACPX permissions separately from OpenClaw exec approvals:
openclaw config set plugins.entries.acpx.config.permissionMode approve-all
openclaw config set plugins.entries.acpx.config.nonInteractivePermissions fail
openclaw gateway restart
Use approve-all as the ACPX break-glass equivalent of a no-prompt harness session. For setup details and failure modes, see ACP agents setup.
Choosing a mode
| Goal | Configure |
|---|---|
| Block host commands completely | tools.exec.mode: "deny" |
| Let known-safe commands run only | tools.exec.mode: "allowlist" |
| Ask a human for every new command shape | tools.exec.mode: "ask" |
| Use Codex or OpenClaw auto-review before humans | tools.exec.mode: "auto" |
| Skip host exec approvals entirely | tools.exec.mode: "full" plus matching host approvals file |
| Make non-interactive ACPX sessions write or exec | plugins.entries.acpx.config.permissionMode: "approve-all" |
If a command still prompts or fails after changing mode, inspect both layers:
openclaw approvals get
openclaw exec-policy show
Host execution uses the stricter result of OpenClaw config and the host-local approvals file. ACPX harness permissions do not relax host execution approvals, and host execution approvals do not relax ACPX harness prompts.