Input Validate JSON Schema

JSON Schema and regex based input validation provider for MuxCore.

A gRPC sidecar module that validates JSON payloads against JSON Schema (using santhosh-tekuri/jsonschema/v5) or regex patterns. Supports inline schema strings and file-based schema references. Without this module, core has no structured input validation capability.

Key Features

• JSON Schema validation — inline json:{…} or named json:<schema-name> (loads {VALIDATE_DATA_DIR}/{schema-name}.json)
• Named schema safety — names must match ^[a-z][a-z0-9_.:-]{0,127}$; . / / / \ path forms are rejected; files resolve only under VALIDATE_DATA_DIR
• Regex validation — regex:<pattern> for string matching (unchanged)
• Detailed errors — Returns per-location validation error messages for JSON Schema violations
• Sanitized output — On success, returns original JSON bytes, or trimmed bytes for regex matches

Configuration

Env var	Default	Description
VALIDATE_GRPC_ADDR	:9660	Module gRPC listen address
VALIDATE_DATA_DIR	./schemas	Directory containing JSON Schema files ({name}.json)
MUXCORE_GRPC_ADDR	(required)	Core mesh gRPC address (SDK; or --muxcore-mesh-addr)
MUXCORE_MODULE_ID	input-validate-jsonschema	Registration ID override (SDK)
MUXCORE_INSECURE_DISABLE_TLS	unset	Set to true to disable TLS to core (dev only)

Usage

make build
export MUXCORE_GRPC_ADDR=localhost:9090
export MUXCORE_INSECURE_DISABLE_TLS=true
./input-validate-jsonschema

Contract

Provides InputValidator over gRPC (InputValidateService). Declares capability: input.validate. Min core: 0.4.0.