Gmail

> INTEGRATION STUB. This skill wires Claude Code to an external tool/account that you must supply and configure: a Gmail/Google Workspace CLI (the real setup uses a gws-style CLI wrapped by a local ~/bin/gmail script) + your Google account. It ships as a working example of the integration pattern, not a turnkey feature. See docs/integrations.md for what to install and how to plug in your own credentials. Without a Gmail/Google Workspace CLI + your Google account, this skill won't run — that's expected.

Create Gmail drafts and sends via a local ` wrapper (the example setup uses a ~/bin/gmail script wrapping a gws`-style Google Workspace CLI). Mandatory for any Gmail interaction — handles encoding, line wraps, threading, and sanitizer checks that would otherwise fail.

Instructions

Always use ` for Gmail draft creation, sends, AND deletes. Never hand-roll RFC-822 with Python's email library or call the underlying gws gmail users drafts create / messages send / drafts delete` directly — the wrapper wraps them, with mandatory sanitizer checks (create/send) and a clobber-guard (delete/update) that prevent recurring failure modes.

Subcommands (the example wrapper is invoked as gmail):

• gmail draft — create or update a draft (default for the "drafts not send" rule). --update is guarded (see below).
• gmail send — send immediately (sanitizer still mandatory; use sparingly — prefer drafts)
• gmail delete --draft-id — delete a draft, guarded against clobbering your edits (see below). ALWAYS use this; never raw gws ... drafts delete.
• gmail check — run sanitizer only, no API call (useful for pre-flighting copy-pasted text)

Clobber guard — deleting / updating a draft you created earlier

You may edit drafts in the Gmail web UI and send them without telling the agent. A draft handed to you on a prior turn has an extremely high likelihood of having changed. The wrapper defends against silently destroying those edits:

• On draft create/update, the tool records the body it wrote under ~/.config/gmail-tool/.
• gmail delete and gmail draft --update re-read the live draft first and REFUSE (exit 2, with a diff) if it differs from what the tool wrote — i.e. if you edited it. Pass --force only after confirming.
• Gmail drafts.delete is permanent (no Trash). NEVER delete or supersede a draft via raw gws gmail users drafts delete — that bypasses the guard. A PreToolUse hook can block the raw form; use gmail delete.

gmail delete --gws-config ~/.config/gws- --draft-id r1234567890

To supersede a draft, prefer gmail draft --update (in-place, guarded) over create-new-then-delete-old.

Common patterns

Simple draft to a secondary account:

gmail draft --gws-config ~/.config/gws- \
  --to recipient@example.com \
  --subject "Subject text" \
  --body-file /tmp/body.txt

Threaded reply (preserves In-Reply-To, References, threadId):

gmail draft --gws-config ~/.config/gws- \
  --to helpdesk@example.com --cc original-sender@example.com \
  --subject "Re: original subject" \
  --body-file /tmp/reply.txt \
  --reply-to-msg-id 

Standalone reply (visible in Drafts label, not nested under thread): Add --no-thread to the above. Recipient-side threading still works via the In-Reply-To/References headers.

Force-send (sanitizer still runs): Use gmail send with the same args (no --update). The "drafts not send" default means this should be rare and explicit.

Defaults

• Body: write to /tmp/body-.txt and pass --body-file (avoids shell-quoting hell)
• Account: pass --gws-config explicitly. Default is whatever GOOGLE_WORKSPACE_CLI_CONFIG_DIR env points to. For multiple Workspace accounts, keep one config dir per account (e.g. ~/.config/gws-).
• Subject and body: tool transliterates non-ASCII (em-dash → --, smart quotes → straight) for max portability — a fine default. Pass --keep-utf8 if you specifically want to preserve accents/em-dashes: the body goes out as charset=utf-8 8bit, and the subject is RFC-2047-encoded (=?utf-8?…?=) so an em-dash subject or an accented name renders correctly in Gmail and recipient clients. This is a case worth testing explicitly the first time you wire up --keep-utf8 in your own wrapper — a naive subject-encoding helper can return raw undecoded unicode instead of the RFC-2047 form, producing mojibake (â€") that only shows up once a real message lands in an inbox. Cheap insurance after any non-ASCII subject: confirm the on-the-wire header with gws gmail users messages get --params '{"userId":"me","id":"","format":"raw"}' and check the Subject: line is =?utf-8?…?= — the metadata format auto-decodes the header, so use raw to catch a raw-bytes regression. The sanitizer checks your input, not the tool's own output, so it won't catch a bug in your own encoding path.
• Sanitizer warnings block by default. Pass --ack-warnings to proceed. Use --dry-run to preview without API call.

Failure modes the tool eliminates

These are the recurring problems that motivated the wrapper — never re-introduce them by going around:

• email.message.EmailMessage.set_content() quoted-printable encodes UTF-8 and hard-wraps at 78 chars, breaking commands and URLs
• Forgetting RFC-2047 on Subject → recipient sees â€" artifacts for em-dashes
• Forgetting Content-Transfer-Encoding: 8bit → same as above
• Hand-fabricating In-Reply-To headers → broken threading on recipient side
• Manually pre-wrapping prose at 80 chars → format=flowed clients can't reflow
• Mojibake (â€", é, etc.) silently sent through — recipient sees garbage
• Backslash line-continuation in commands → recipient's mail client may break them
• "Re:" subject without --reply-to-msg-id → looks like a reply but isn't threaded

All caught by the sanitizer. Don't go around it.

When NOT to use the tool

• Sending an existing draft built in the Gmail web UI: that draft never went through the sanitizer, so use raw gws gmail users drafts send only if you explicitly want that bypass.
• Bulk operations (>10 drafts at once): the wrapper isn't optimized for that; confirm before doing it.

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: PropterMalone
• Source: PropterMalone/PropterMaltwo
• License: MIT

Install and usage instructions live in the source repository linked above.