Protocol v1 (Removed)
V1 Protocol Removed
Agent Protocol v1 was **removed** in Zentinel release 26.02_18 (February 2026). All agents must use [Protocol v2](../v2/). The documentation below is preserved for historical reference only.
Agent Protocol v1 was **removed** in Zentinel release 26.02_18 (February 2026). All agents must use [Protocol v2](../v2/). The documentation below is preserved for historical reference only.
Documentation (Historical)
| Page | Description |
|---|---|
| Protocol Specification | Wire protocol and message formats |
| Events & Hooks | Request lifecycle events agents can handle |
| Building Agents | How to create your own agent |
| Transport Protocols | Unix sockets and gRPC connectivity |
Migrating to v2
All agents must use Protocol v2. See the v2 documentation for the current protocol specification, API reference, and transport options.