zeroclaw/examples/plugins/echo

Echo Plugin Example

This folder contains a minimal plugin manifest and a WAT template matching the current host ABI.

Files:

• echo.plugin.toml - plugin declaration loaded by ZeroClaw
• echo.wat - sample WASM text source

Build

Convert WAT to WASM with wat2wasm:

wat2wasm examples/plugins/echo/echo.wat -o examples/plugins/echo/echo.wasm

Enable in config

[plugins]
enabled = true
dirs = ["examples/plugins/echo"]
hot_reload = true

ABI exports required

• memory
• alloc(i32) -> i32
• dealloc(i32, i32)
• zeroclaw_tool_execute(i32, i32) -> i64
• zeroclaw_provider_chat(i32, i32) -> i64

The i64 return packs output pointer/length:

• high 32 bits: pointer
• low 32 bits: length

Input/output payloads are UTF-8 JSON.

Note: this example intentionally keeps logic minimal and is not production-safe.