hashgraph-online Agent Mail — optional coordination adapter
Agent Mail carries messages, acknowledgements, identities, and temporary file reservations. It is not a task tracker, queue, proof ledger, or lifecycle controller.
Reservations prevent collisions only because every cooperating writer checks them against the same absolute project path; one writer registered against a different path resolution makes the whole ledger advisory fiction.
Named failure mode — silence-as-status: reading an unanswered thread as "work stalled" or "work done"; mail silence proves only that no mail arrived.
Anti-pattern: widening or renewing a reservation unprompted when a conflict appears. Corrective: report the conflict to the caller as-is; scope and TTL changes are the caller's call.
Boundary
- Skip Agent Mail for a single writer.
- The caller supplies the absolute project path, agent identities, thread id, participants, paths, exclusivity, reason, and TTL.
- Reservations prevent accidental overlap among cooperating writers. They do not create work ownership or affect Plan, Candidate, or verdict semantics.
- Mail silence proves nothing about work status.
- A message or acknowledgement is evidence that communication occurred, not evidence that a change is correct or complete.
- Agent Mail never selects work, changes tracker state, commits code, validates, integrates, closes, releases, or delivers work.
Surfaces
Use the MCP tools when they are present. Otherwise use the self-describing am
CLI. Discover current syntax with am mail --help,
am file_reservations --help, and related group help; do not infer commands
from remembered aliases.
One-shot use
- Confirm that multiple explicitly coordinated writers share the repository.
- Register the caller-supplied identity against the same absolute project path.
- Reserve only the supplied paths, with a bounded TTL.
- Report conflicts without waiting, narrowing scope, or changing the plan.
- Send the supplied message once and record its id.
- Read or acknowledge only the requested thread.
- Release only reservations the caller explicitly asks to release.
Output
Return the project, identity, thread/message ids, reservation ids and paths, conflicts, timestamps, and any degraded or unavailable surface. The caller owns all subsequent decisions.
References
- CLI and MCP surface notes
- Coordination patterns
- Troubleshooting
Source: hashgraph-online/awesome-codex-plugins → plugins/boshu2/agentops/skills-codex/agent-mail/SKILL.md