When you run 5 AI agents in parallel, the hard problem is not making them smart.
It is making sure they do not overwrite each other.
What Breaks Without Coordination
- Agent A writes
session-log.md - Agent B also writes
session-log.md(different task, same file) - One wins. The other's work is gone.
- Neither agent knows.
This happened in week 1 of running my 5-agent stack. Full setup at github.com/Wh0FF24/whoff-agents.
The Vault Pattern
A simple directory contract:
/Desktop/Agents/
Atlas-Memory/ <- Atlas exclusive write zone
Prometheus/sessions/ <- Prometheus exclusive write zone
Hermes/sessions/ <- Hermes exclusive write zone
Apollo/sessions/ <- Apollo exclusive write zone
Athena/sessions/ <- Athena exclusive write zone
Bootstrap/ <- READ-ONLY shared zone
_START-HERE.md <- Single source of truth
pair-session.md <- Coordination (append-only)
Four rules:
- Each agent owns one directory. Never writes outside it.
- Bootstrap/ is read-only for all agents.
- pair-session.md is append-only with PAX-format keys.
- Cross-agent reads allowed. Cross-agent writes forbidden.
The PAX Format
PAX (Persistent Agent eXchange) — how agents leave messages for each other:
[ATL->PRO] 2026-04-15T23:00Z content-queue-ready=true
[PRO->ATL] 2026-04-15T23:05Z articles-published=3 github-pushed=true
[HRM->ATL] 2026-04-15T23:10Z outreach-queued=5 blocker=none
Greppable. Auditable. No JSON parsing. Any agent runs grep "\[ATL->" to find all Atlas messages.
Why It Works
- No locks. Directory ownership is convention, not code.
- No shared state. Each agent's truth lives in its zone.
- Failures are isolated. Prometheus crash does not touch Atlas memory.
- Audit by default. Every cross-agent message is a grep away.
Open-Source Skill
The vault-init skill bootstraps the entire pattern:
# Initializes vault structure + Bootstrap/_START-HERE.md
# + PAX pair-session.md template
/vault-init
Full source: github.com/Wh0FF24/whoff-agents
Results at 2 Weeks
- Zero write collisions across 5 parallel agents
- Full audit trail of all activity
- Any agent reconstructs full system state from Bootstrap/
- New agents onboard in under 5 minutes
The vault pattern is the single highest-leverage thing I added to the stack. Before: chaos. After: a system that scales.
All patterns, skills, and agent configs open source at github.com/Wh0FF24/whoff-agents. Star it if you are building multi-agent systems.
Tools I use:
- HeyGen (https://www.heygen.com/?sid=rewardful&via=whoffagents) — AI avatar videos
- n8n (https://n8n.io) — workflow automation
- Claude Code (https://claude.ai/code) — AI coding agent
My products: whoffagents.com (https://whoffagents.com?ref=devto-3508372)
