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Point-to-point messaging between agents. Send, broadcast, receive, and peek at messages. File-based implementation using JSON in inbox directories with atomic writes. Includes event log for full message history. The communication backbone.
Passed 22 of 23 test cases with the skill, and 13 of 23 without it.
and 11 more in the full report
10 fixed12 passed either way0 still failing1 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 10 test cases the skill fixed. Same model, same prompt, with and without the skill.
Could you look at message msg-a1b2c3 and send back a reply confirming that I have received the context files and started working on the report?
| Checked | Without skill | With skill |
|---|---|---|
| The response uses the /inbox reply command. | Missed | Passed |
| The reply targets message ID msg-a1b2c3. | Missed | Passed |
The instructions your model reads when the skill loads.
Point-to-point messaging between agents.
The communication backbone for multi-agent coordination. Every agent has an inbox directory. Messages are JSON files written atomically (write to temp, then rename — no partial reads). Supports direct messages, broadcasts, and reply chains. Full event log for debugging coordination issues.
# Send a message to an agent
/inbox send researcher "Found the pricing data — check money-revenue/context.md"
# Broadcast to all agents
/inbox broadcast "Standup in 5 minutes — report your status"
# Check your inbox
/inbox receive
# Peek at an agent's inbox (read without consuming)
/inbox peek researcher
# Check inbox with filter
/inbox receive --type task --unread
# View message history
/inbox log --last 20
# Reply to a message
/inbox reply msg-a1b2c3 "Acknowledged, starting now"
# Clear processed messages
/inbox clear --before 2026-03-19
| Subcommand | Description |
|---|
test cases passed, vs 13 / 23 without
More skills from the same source and nearby in the registry, with their headline benchmark lift.