Slack drafts

Use this skill when the user wants a Slack message prepared for them to review and send themselves: "draft a reply to X", "prep a message for #general", "write that up as a Slack draft". The draft lands in their own Slack composer, attributed to them, targeted at the conversation you choose — nothing is posted.

This is an OAuth connector. The resolved user's Slack user token lives on your computer as $VAULT_TOKEN_SLACK_COM. Do not ask the user for a token, log it, or use another principal's. If the variable is empty or Slack returns 401/403, the user either has not connected Slack or connected before this permission existed — tell them to (re)connect it through the product OAuth flow.

Use the bundled helper for every draft — it owns destination resolution, rich-text block construction, and the required draft envelope:

Run these commands with execute and an explicit sandbox_id, using the absolute directory reported by the skill read in place of <skill dir>. Keep that ID for preparing body files and running the helper.

python3 "<skill dir>/scripts/slack_drafts.py" create --to '#general' --text 'hello'
python3 "<skill dir>/scripts/slack_drafts.py" create --to '@jane' --text-file body.txt
python3 "<skill dir>/scripts/slack_drafts.py" create --to C0123ABCDEF --thread-ts 1712345678.000100 --text '...'
python3 "<skill dir>/scripts/slack_drafts.py" resolve --to '#general'

• --to takes a channel/IM ID (C…/G…/D…), a user ID (U…/W…), #channel-name, or @name (matched against username, display name, real name, or email; ambiguous matches are refused — fall back to a user ID).
• Text is plain; URLs become clickable links. Write it exactly as the user would send it — it goes out under their name, in their voice, once they hit send.
• --thread-ts targets the draft at a thread reply instead of the channel composer.
• Drafts are create-only through this API: you cannot list, edit, or delete a draft once made. To revise, tell the user to discard the old draft in Slack and create a fresh one. Never work around this by posting messages — drafting means the user sends.
• Opening a brand-new DM needs the im:write scope; tokens connected before that scope existed can only draft into conversations that already exist. On a missing_scope error, tell the user to reconnect Slack.
• Slack keeps at most one draft per composer: a second draft into the same channel or thread fails with attached_draft_exists. Tell the user to send or discard the existing draft, then retry.