ClawHub

Clawback

Workflows

Gmail security proxy with policy enforcement, approval workflows, and audit logging. Use when the user wants to read, search, or send Gmail with guardrails — send actions may require human approval before executing.

Install

openclaw skills install clawback-sh

clawback

Use clawback for Gmail with policy enforcement. All operations go through a server-side proxy that enforces policies and logs an audit trail. Sends may require human approval.

Prerequisites

The clawback binary must be installed and on your PATH. If it's missing, releases are available at https://github.com/honeybadge-labs/clawback/releases.

Setup (once)

  • clawback auth login (device flow — opens browser)
  • clawback auth status (verify connection)

Common commands

  • Gmail search: clawback gmail search 'newer_than:7d' --max 10
  • Gmail search (all pages): clawback gmail search 'from:boss@company.com' --all --json
  • Gmail get message: clawback gmail get <messageId> --json
  • Gmail send (plain): clawback gmail send --to a@b.com --subject "Hi" --body "Hello"
  • Gmail send (HTML): clawback gmail send --to a@b.com --subject "Hi" --body-html "<p>Hello</p>"
  • Gmail send (reply): clawback gmail send --to a@b.com --subject "Re: Hi" --body "Reply" --reply-to-message-id <msgId> --thread-id <threadId>
  • Thread list: clawback gmail thread list 'subject:meeting' --max 20
  • Thread get: clawback gmail thread get <threadId> --json
  • Thread modify labels: clawback gmail thread modify <threadId> --add STARRED --remove UNREAD
  • Labels list: clawback gmail labels list
  • Labels create: clawback gmail labels create --name "Important/Clients"
  • Labels modify message: clawback gmail labels modify <messageId> --add STARRED --remove UNREAD
  • Drafts list: clawback gmail drafts list --json
  • Drafts create: clawback gmail drafts create --to a@b.com --subject "Draft" --body "WIP"
  • Drafts send: clawback gmail drafts send <draftId> (may require approval)
  • Drafts delete: clawback gmail drafts delete <draftId>
  • History: clawback gmail history --since <historyId> --max 50
  • Batch delete: clawback gmail batch delete <id1> <id2> <id3>
  • Batch modify: clawback gmail batch modify <id1> <id2> --add INBOX --remove SPAM
  • Settings filters list: clawback gmail settings filters list --json
  • Settings send-as list: clawback gmail settings send-as list
  • Settings vacation get: clawback gmail settings vacation get
  • Settings forwarding list: clawback gmail settings forwarding list
  • Settings delegates list: clawback gmail settings delegates list
  • Approvals list: clawback approvals list --status pending --json
  • Approvals get: clawback approvals get <approvalId> --json
  • Policy list: clawback policy list --json

Agent behavior

  • Never expose approval IDs, exit codes, or CLI commands to the user. Those are internal plumbing.
  • When composing email on the user's behalf, draft a natural subject and body — don't parrot their words verbatim. If they say "send a hello to Alex," write a friendly greeting, not --subject "hello" --body "hello".
  • Confirm with the user before sending. Show them the draft (to, subject, body) and ask if it looks good.

Handling approvals (exit code 8)

When a send command exits with code 8, it means the email needs human approval before it goes out.

  1. Tell the user in plain language: "Sent! It needs approval in Clawback before it goes through — I'll keep an eye on it."
  2. Poll clawback approvals get <approvalId> --json in the background every ~30s.
  3. When resolved, proactively tell the user: "Approved and delivered" or "The approval was rejected/expired — the email was not sent."
  4. Never ask the user to run commands or check approval status themselves.

Handling other errors

  • Exit 4 (not authenticated): "You're not signed in — let me open the login flow." Then run clawback auth login.
  • Exit 6 (blocked by policy): "Your org's policy doesn't allow this action." Explain what was blocked.
  • Exit 3 (no results): Report naturally, e.g. "No emails matched that search."
  • Exit 1 (unexpected error): Report the error and suggest retrying.

Notes

  • CB_SERVER defaults to https://clawback.sh; set it to use a different server.
  • Prefer --json plus --no-input plus --fail-empty for reliable output parsing.
  • --connection <id> selects which Gmail connection to use; auto-detected if you have one connection.
  • --all auto-paginates search results (gmail search and thread list).
  • --select field1,field2 projects JSON output to specific fields.
  • --results-only strips the envelope and returns just the data array.
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