nerve CLI

The nerve CLI provides two commands for schema management and live stream debugging.

Installation

Bash

cargo install nerve-cli

nerve register

Bash

# Register a schema and generate Rust code
nerve register schemas/fleet_gps_v2.fbs

# Specify output directory
nerve register schemas/fleet_gps_v2.fbs -o src/generated

What it does:

1. Validates — checks the file exists and contains table or struct keywords
2. Computes SchemaId — first 4 bytes of SHA-256 of the file content, printed as hex
3. Runs flatc — generates Rust bindings via flatc --rust -o <output> <schema> (requires flatc on $PATH)
4. Creates output dir — if it doesn't exist (default: src/generated)

nerve tap

Live stream debugging — connect to a Tetrapus server and print decoded messages for a topic.

Bash

# Tap alerts on default endpoint
nerve tap -t alerts.critical

# Tap with custom endpoint
nerve tap -t telemetry.fleet -e 10.0.0.5:4433

Useful for verifying that SDK sources are publishing correctly, checking message format, and monitoring throughput on specific topics.

Error Reference

Error	Cause	Fix
SchemaNotFound	File path doesn't exist	Check path and working directory
InvalidSchema	No `table` or `struct` keyword	Verify it's a valid FlatBuffers .fbs file
FlatcNotFound	`flatc` not on $PATH	Install FlatBuffers compiler: `apt install flatbuffers-compiler`
FlatcFailed	flatc returned an error	Check schema syntax with `flatc --no-gen-all schema.fbs`

Questions?

Reach out for help with integration, deployment, or custom domain codecs.

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