openclaw/docs/tools/exec-approvals-advanced.md

summary, read_when, title

summary	read_when	title
Advanced exec approvals: safe bins, interpreter binding, approval forwarding, native delivery	Configuring safe bins or custom safe-bin profiles Forwarding approvals to Slack/Discord/Telegram or other chat channels Implementing a native approval client for a channel	Exec approvals — advanced

Advanced exec-approval topics: the safeBins fast-path, interpreter/runtime binding, and approval-forwarding to chat channels (including native delivery). For the core policy and approval flow, see Exec approvals.

Safe bins (stdin-only)

tools.exec.safeBins defines a small list of stdin-only binaries (for example cut) that can run in allowlist mode without explicit allowlist entries. Safe bins reject positional file args and path-like tokens, so they can only operate on the incoming stream. Treat this as a narrow fast-path for stream filters, not a general trust list.

Do **not** add interpreter or runtime binaries (for example `python3`, `node`, `ruby`, `bash`, `sh`, `zsh`) to `safeBins`. If a command can evaluate code, execute subcommands, or read files by design, prefer explicit allowlist entries and keep approval prompts enabled. Custom safe bins must define an explicit profile in `tools.exec.safeBinProfiles.`.

Default safe bins:

cut, uniq, head, tail, tr, wc

grep and sort are not in the default list. If you opt in, keep explicit allowlist entries for their non-stdin workflows. For grep in safe-bin mode, provide the pattern with -e/--regexp; positional pattern form is rejected so file operands cannot be smuggled as ambiguous positionals.

Argv validation and denied flags

Validation is deterministic from argv shape only (no host filesystem existence checks), which prevents file-existence oracle behavior from allow/deny differences. File-oriented options are denied for default safe bins; long options are validated fail-closed (unknown flags and ambiguous abbreviations are rejected).

Denied flags by safe-bin profile:

• grep: --dereference-recursive, --directories, --exclude-from, --file, --recursive, -R, -d, -f, -r
• jq: --argfile, --from-file, --library-path, --rawfile, --slurpfile, -L, -f
• sort: --compress-program, --files0-from, --output, --random-source, --temporary-directory, -T, -o
• wc: --files0-from

Safe bins also force argv tokens to be treated as literal text at execution time (no globbing and no $VARS expansion) for stdin-only segments, so patterns like * or $HOME/... cannot be used to smuggle file reads.

Trusted binary directories

Safe bins must resolve from trusted binary directories (system defaults plus optional tools.exec.safeBinTrustedDirs). PATH entries are never auto-trusted. Default trusted directories are intentionally minimal: /bin, /usr/bin. If your safe-bin executable lives in package-manager/user paths (for example /opt/homebrew/bin, /usr/local/bin, /opt/local/bin, /snap/bin), add them explicitly to tools.exec.safeBinTrustedDirs.

Shell chaining, wrappers, and multiplexers

Shell chaining (&&, ||, ;) is allowed when every top-level segment satisfies the allowlist (including safe bins or skill auto-allow). Redirections remain unsupported in allowlist mode. Command substitution ($() / backticks) is rejected during allowlist parsing, including inside double quotes; use single quotes if you need literal $() text.

On macOS companion-app approvals, raw shell text containing shell control or expansion syntax (&&, ||, ;, |, `, $, <, >, (, )) is treated as an allowlist miss unless the shell binary itself is allowlisted.

For shell wrappers (bash|sh|zsh ... -c/-lc), request-scoped env overrides are reduced to a small explicit allowlist (TERM, LANG, LC_*, COLORTERM, NO_COLOR, FORCE_COLOR).

For allow-always decisions in allowlist mode, known dispatch wrappers (env, nice, nohup, stdbuf, timeout) persist the inner executable path instead of the wrapper path. Shell multiplexers (busybox, toybox) are unwrapped for shell applets (sh, ash, etc.) the same way. If a wrapper or multiplexer cannot be safely unwrapped, no allowlist entry is persisted automatically.

If you allowlist interpreters like python3 or node, prefer tools.exec.strictInlineEval=true so inline eval still requires an explicit approval. In strict mode, allow-always can still persist benign interpreter/script invocations, but inline-eval carriers are not persisted automatically.

Safe bins versus allowlist

Topic	tools.exec.safeBins	Allowlist (exec-approvals.json)
Goal	Auto-allow narrow stdin filters	Explicitly trust specific executables
Match type	Executable name + safe-bin argv policy	Resolved executable path glob, or bare command-name glob for PATH-invoked commands
Argument scope	Restricted by safe-bin profile and literal-token rules	Path match by default; optional argPattern can restrict parsed argv
Typical examples	head, tail, tr, wc	jq, python3, node, ffmpeg, custom CLIs
Best use	Low-risk text transforms in pipelines	Any tool with broader behavior or side effects

Configuration location:

• safeBins comes from config (tools.exec.safeBins or per-agent agents.list[].tools.exec.safeBins).
• safeBinTrustedDirs comes from config (tools.exec.safeBinTrustedDirs or per-agent agents.list[].tools.exec.safeBinTrustedDirs).
• safeBinProfiles comes from config (tools.exec.safeBinProfiles or per-agent agents.list[].tools.exec.safeBinProfiles). Per-agent profile keys override global keys.
• allowlist entries live in host-local ~/.openclaw/exec-approvals.json under agents.<id>.allowlist (or via Control UI / openclaw approvals allowlist ...).
• openclaw security audit warns with tools.exec.safe_bins_interpreter_unprofiled when interpreter/runtime bins appear in safeBins without explicit profiles.
• openclaw doctor --fix can scaffold missing custom safeBinProfiles.<bin> entries as {} (review and tighten afterward). Interpreter/runtime bins are not auto-scaffolded.

Custom profile example:

{
  tools: {
    exec: {
      safeBins: ["jq", "myfilter"],
      safeBinProfiles: {
        myfilter: {
          minPositional: 0,
          maxPositional: 0,
          allowedValueFlags: ["-n", "--limit"],
          deniedFlags: ["-f", "--file", "-c", "--command"],
        },
      },
    },
  },
}

If you explicitly opt jq into safeBins, OpenClaw still rejects the env builtin in safe-bin mode so jq -n env cannot dump the host process environment without an explicit allowlist path or approval prompt.

Interpreter/runtime commands

Approval-backed interpreter/runtime runs are intentionally conservative:

• Exact argv/cwd/env context is always bound.
• Direct shell script and direct runtime file forms are best-effort bound to one concrete local file snapshot.
• Common package-manager wrapper forms that still resolve to one direct local file (for example pnpm exec, pnpm node, npm exec, npx) are unwrapped before binding.
• If OpenClaw cannot identify exactly one concrete local file for an interpreter/runtime command (for example package scripts, eval forms, runtime-specific loader chains, or ambiguous multi-file forms), approval-backed execution is denied instead of claiming semantic coverage it does not have.
• For those workflows, prefer sandboxing, a separate host boundary, or an explicit trusted allowlist/full workflow where the operator accepts the broader runtime semantics.

When approvals are required, the exec tool returns immediately with an approval id. Use that id to correlate later approved-run system events (Exec finished, and Exec running when configured). If no decision arrives before the timeout, the request is treated as an approval timeout and surfaced as a terminal host-command denial. For main-agent async approvals with an originating session, OpenClaw also resumes that session with an internal followup so the agent observes that the command did not run instead of later repairing a missing result.

Followup delivery behavior

After an approved async exec finishes, OpenClaw sends a followup agent turn to the same session. Denied async approvals use the same main-session followup path for the denial status, but they do not register elevated runtime handoffs and they do not run the command. Denials without a resumable main session are either suppressed or reported through a safe direct route when one exists.

• If a valid external delivery target exists (deliverable channel plus target to), followup delivery uses that channel.
• In webchat-only or internal-session flows with no external target, followup delivery stays session-only (deliver: false).
• If a caller explicitly requests strict external delivery with no resolvable external channel, the request fails with INVALID_REQUEST.
• If bestEffortDeliver is enabled and no external channel can be resolved, delivery is downgraded to session-only instead of failing.

Approval forwarding to chat channels

You can forward exec approval prompts to any chat channel (including plugin channels) and approve them with /approve. This uses the normal outbound delivery pipeline.

Config:

{
  approvals: {
    exec: {
      enabled: true,
      mode: "session", // "session" | "targets" | "both"
      agentFilter: ["main"],
      sessionFilter: ["discord"], // substring or regex
      targets: [
        { channel: "slack", to: "U12345678" },
        { channel: "telegram", to: "123456789" },
      ],
    },
  },
}

Reply in chat:

/approve <id> allow-once
/approve <id> allow-always
/approve <id> deny

The /approve command handles both exec approvals and plugin approvals. If the ID does not match a pending exec approval, it automatically checks plugin approvals instead.

Plugin approval forwarding

Plugin approval forwarding uses the same delivery pipeline as exec approvals but has its own independent config under approvals.plugin. Enabling or disabling one does not affect the other. For plugin-authoring behavior, request fields, and decision semantics, see Plugin permission requests.

{
  approvals: {
    plugin: {
      enabled: true,
      mode: "targets",
      agentFilter: ["main"],
      targets: [
        { channel: "slack", to: "U12345678" },
        { channel: "telegram", to: "123456789" },
      ],
    },
  },
}

The config shape is identical to approvals.exec: enabled, mode, agentFilter, sessionFilter, and targets work the same way.

Channels that support shared interactive replies render the same approval buttons for both exec and plugin approvals. Channels without shared interactive UI fall back to plain text with /approve instructions. Plugin approval requests may restrict the available decisions. Approval surfaces use the request's declared decision set, and the Gateway rejects attempts to submit a decision that was not offered.

Same-chat approvals on any channel

When an exec or plugin approval request originates from a deliverable chat surface, the same chat can now approve it with /approve by default. This applies to channels such as Slack, Matrix, and Microsoft Teams in addition to the existing Web UI and terminal UI flows.

This shared text-command path uses the normal channel auth model for that conversation. If the originating chat can already send commands and receive replies, approval requests no longer need a separate native delivery adapter just to stay pending.

Discord and Telegram also support same-chat /approve, but those channels still use their resolved approver list for authorization even when native approval delivery is disabled.

For Telegram and other native approval clients that call the Gateway directly, this fallback is intentionally bounded to "approval not found" failures. A real exec approval denial/error does not silently retry as a plugin approval.

Native approval delivery

Some channels can also act as native approval clients. Native clients add approver DMs, origin-chat fanout, and channel-specific interactive approval UX on top of the shared same-chat /approve flow.

When native approval cards/buttons are available, that native UI is the primary agent-facing path. The agent should not also echo a duplicate plain chat /approve command unless the tool result says chat approvals are unavailable or manual approval is the only remaining path.

If a native approval client is configured but no native runtime is active for the originating channel, OpenClaw keeps the local deterministic /approve prompt visible. If the native runtime is active and attempts delivery but no target receives the card, OpenClaw sends a same-chat fallback notice with the exact /approve <id> <decision> command so the request can still be resolved.

Generic model:

• host exec policy still decides whether exec approval is required
• approvals.exec controls forwarding approval prompts to other chat destinations
• channels.<channel>.execApprovals controls whether Discord, Slack, Telegram, and similar channel-specific native clients are enabled
• Slack plugin approvals can use Slack's native approval client when the request comes from Slack and Slack plugin approvers resolve; approvals.plugin can also route plugin approvals to Slack sessions or targets even when Slack exec approvals are disabled
• Google Chat native approval cards handle exec and plugin approvals that originate from Google Chat spaces or threads when stable users/<id> approvers resolve from dm.allowFrom or defaultTo; they do not use reaction events for decisions
• WhatsApp and Signal reaction approval delivery are gated by approvals.exec and approvals.plugin; they do not have channels.<channel>.execApprovals blocks

Native approval clients auto-enable DM-first delivery when all of these are true:

• the channel supports native approval delivery
• approvers can be resolved from explicit execApprovals.approvers or owner identity such as commands.ownerAllowFrom
• channels.<channel>.execApprovals.enabled is unset or "auto"

Set enabled: false to disable a native approval client explicitly. Set enabled: true to force it on when approvers resolve. Public origin-chat delivery stays explicit through channels.<channel>.execApprovals.target.

FAQ: Why are there two exec approval configs for chat approvals?

• Discord: channels.discord.execApprovals.*
• Slack: channels.slack.execApprovals.*
• Telegram: channels.telegram.execApprovals.*
• Google Chat: configure stable approvers with channels.googlechat.dm.allowFrom or channels.googlechat.defaultTo; no execApprovals block is required
• WhatsApp: use approvals.exec and approvals.plugin to route approval prompts to WhatsApp
• Signal: use approvals.exec and approvals.plugin to route approval prompts to Signal

These native approval clients add DM routing and optional channel fanout on top of the shared same-chat /approve flow and shared approval buttons.

Shared behavior:

• Slack, Matrix, Microsoft Teams, and similar deliverable chats use the normal channel auth model for same-chat /approve
• when a native approval client auto-enables, the default native delivery target is approver DMs
• for Discord and Telegram, only resolved approvers can approve or deny
• Discord approvers can be explicit (execApprovals.approvers) or inferred from commands.ownerAllowFrom
• Telegram approvers can be explicit (execApprovals.approvers) or inferred from commands.ownerAllowFrom
• Slack approvers can be explicit (execApprovals.approvers) or inferred from commands.ownerAllowFrom
• Slack plugin approval DMs use Slack plugin approvers from allowFrom and account default routing, not Slack exec approvers
• Slack native buttons preserve approval id kind, so plugin: ids can resolve plugin approvals without a second Slack-local fallback layer
• Google Chat native cards preserve the manual /approve fallback in message text but card button callbacks carry only opaque action tokens; approval id and decision are recovered from server-side pending state
• WhatsApp emoji approvals handle both exec and plugin prompts only when the matching top-level forwarding family is enabled and routes to WhatsApp; target-only WhatsApp forwarding stays on the shared forwarding path unless it matches the same native origin target
• Signal reaction approvals handle both exec and plugin prompts only when the matching top-level forwarding family is enabled and routes to Signal. Direct same-chat Signal exec approvals can suppress the local /approve fallback without explicit approvers; Signal reaction resolution still requires explicit Signal approvers from channels.signal.allowFrom or defaultTo.
• Matrix native DM/channel routing and reaction shortcuts handle both exec and plugin approvals; plugin authorization still comes from channels.matrix.dm.allowFrom
• Matrix native prompts include com.openclaw.approval custom event content on the first prompt event so OpenClaw-aware Matrix clients can read structured approval state while stock clients keep the plain-text /approve fallback
• the requester does not need to be an approver
• the originating chat can approve directly with /approve when that chat already supports commands and replies
• native Discord approval buttons route by approval id kind: plugin: ids go straight to plugin approvals, everything else goes to exec approvals
• native Telegram approval buttons follow the same bounded exec-to-plugin fallback as /approve
• when native target enables origin-chat delivery, approval prompts include the command text
• pending exec approvals expire after 30 minutes by default
• if no operator UI or configured approval client can accept the request, the prompt falls back to askFallback

Sensitive owner-only group commands such as /diagnostics and /export-trajectory use private owner routing for approval prompts and final results. OpenClaw first tries a private route on the same surface where the owner ran the command. If that surface has no private owner route, it falls back to the first available owner route from commands.ownerAllowFrom, so a Discord group command can still send the approval and result to the owner's Telegram DM when Telegram is the configured primary private interface. The group chat only gets a short acknowledgement.

Telegram defaults to approver DMs (target: "dm"). You can switch to channel or both when you want approval prompts to appear in the originating Telegram chat/topic as well. For Telegram forum topics, OpenClaw preserves the topic for the approval prompt and the post-approval follow-up.

See:

• Discord
• Telegram

macOS IPC flow

Gateway -> Node Service (WS)
                 |  IPC (UDS + token + HMAC + TTL)
                 v
             Mac App (UI + approvals + system.run)

Security notes:

• Unix socket mode 0600, token stored in exec-approvals.json.
• Same-UID peer check.
• Challenge/response (nonce + HMAC token + request hash) + short TTL.

FAQ

When would accountId and threadId be used on an approval target?

Use accountId when the channel has multiple configured identities and the approval prompt must leave through one specific account. Use threadId when the destination supports topics or threads and the prompt should stay inside that thread instead of the top-level chat.

A concrete Telegram case is an operations supergroup with forum topics and two Telegram bot accounts. The to value names the supergroup, accountId selects the bot account, and threadId selects the forum topic:

{
  approvals: {
    exec: {
      enabled: true,
      mode: "targets",
      targets: [
        {
          channel: "telegram",
          to: "-1001234567890",
          accountId: "ops-bot",
          threadId: "77",
        },
      ],
    },
  },
  channels: {
    telegram: {
      accounts: {
        default: {
          name: "Primary bot",
          botToken: "env:TELEGRAM_PRIMARY_BOT_TOKEN",
        },
        "ops-bot": {
          name: "Operations bot",
          botToken: "env:TELEGRAM_OPS_BOT_TOKEN",
        },
      },
    },
  },
}

With that setup, forwarded exec approvals are posted by the ops-bot Telegram account into topic 77 of chat -1001234567890. A target without accountId uses the channel's default account, and a target without threadId posts to the top-level destination.

When approvals are sent to a session, can anyone in that session approve them?

No. Session delivery only controls where the prompt appears. It does not by itself authorize every participant in that chat to approve.

For generic same-chat /approve, the sender must already be authorized for commands in that channel session. If the channel exposes explicit approval approvers, those approvers can authorize the /approve action even when they are not otherwise command-authorized in that session.

Some channels are stricter. Discord, Telegram, Matrix, Slack native approval DMs, and similar native approval clients use their resolved approver lists for approval authorization. For example, a Telegram forum-topic approval prompt can be visible to everyone in the topic, but only numeric Telegram user IDs resolved from channels.telegram.execApprovals.approvers or commands.ownerAllowFrom can approve or deny it.

Related

• Exec approvals — core policy and approval flow
• Exec tool
• Elevated mode
• Skills — skill-backed auto-allow behavior