Recipe

Protobuf schema writer

Generate a typed Protobuf schema from a Meridian payload definition and write it to disk. Used when shipping structured telemetry or license envelopes to native components.

Prerequisites

Meridian CLI v2.4+ installed and authenticated
A payload.json definition in the working directory
Write access to the target output path

Steps

Define the payload shape
Create payload.json with field names, types, and wire numbers. Supported types: string, bytes, uint32, uint64, bool, enum, repeated, and nested messages.

Run the schema generator

meridian proto write --in payload.json --out schema.proto

Verify the output
Open schema.proto and confirm all message definitions, field numbers, and type mappings are correct.
Compile for your target language
```
protoc --cpp_out=./gen schema.proto
```

Flags

Flag	Default	Description
--in	payload.json	Path to the payload definition file
--out	schema.proto	Destination path for the generated .proto
--package	meridian	Protobuf package name

Next: Recipe: License envelope signing