Tasks: API /send returns 409 when paused #1265

Repo: coder/coder

Scope: Modify send endpoint to return 409 Conflict when task is paused, enabling client-side auto-resume.

Changes:

• Modify POST /api/v2/tasks/{user}/{task}/send to check task/workspace status early
• Return 409 Conflict with clear error message if task is paused
• Error response should indicate task is paused and suggest resuming

Files:

• coderd/aitasks.go

Acceptance criteria:

• Returns 409 when task is paused
• Error message clearly indicates task is paused
• Existing behavior unchanged for active tasks
• Response includes enough information for clients to auto-resume and retry send

Dependencies:

• Tasks: Resume endpoint #1262

References:

• PRD: Start/Pause/Resume the Task Workspace
• RFC: Tasks: Start/Pause/Resume Lifecycle: API Changes (Modified endpoints), Auto-Resume Option A