Building a shared inbox for agents
As I started running more agents across projects, reviewing their work became a bottleneck. Questions and proposals were spread across threads, each needing me to reconstruct the context before answering.

I built Input as a Codex plugin, then brought the same interface into ChatGPT. MCP lets agents send questions, options and visual proposals into a shared inbox. My response goes back to the originating conversation, and the agent can report what happened next.
Tool | Purpose |
|---|---|
open_input | Open the embedded interface |
get_queue | Read the shared inbox and activity |
publish_card | Create or update a pending proposal |
submit_decision | Record a decision and selected options |
add_comment | Reply on an input |
report_result | Report progress or an outcome |
list_events | List supported decision and comment events |
get_subscription_status | Check event subscription readiness |
import_history | Import history without triggering events |
list_goals | Read goals and subgoals |
get_goal | Read a goal and its activity |
upsert_goal | Create or update an agent-managed goal |
upload_image | Upload a private image |
get_image | Read private image data |
I’ve been using it to guide its own development. That quickly made the follow-through as important as the decision: seeing how my feedback changed the work, without having to chase it across threads.









