Require deliverable:true for all channel attachments including images; extend save_deliverable_attachment with attachment_id; add WeChat proactive attachment delivery; inject channel file rules via system prompt instead of repeating on every user message.
Co-authored-by: Cursor <cursoragent@cursor.com>
Add save_deliverable_attachment for explicit document outbound, pass channel user_id into tool risk gating so write_file/run_command respect per-user allow_high settings, and document the workflow in channel-file-delivery skill.
Co-authored-by: Cursor <cursoragent@cursor.com>
