runtime/README.md

vsp-otel

Operationalizes: VSP — Λ-signed OTel Span Exporter
Repo: szl-holdings/vsp-otel
Path: ./ (root)

What it does

Wraps an OpenTelemetry span pipeline with a Λ-signing layer. Every span exported through this module receives:

1. Axis score derivation from span attributes (lambda.* attribute namespace)
2. Λ-gate evaluation (uses @szl/ouroboros-lambda-gate as upstream)
3. A SHA-256 receipt hash stored in the gate's receipt store if pass=true

Span attribute convention

Encode axis scores as span attributes with the lambda. prefix:

lambda.moralGrounding = 0.96
lambda.measurabilityHonesty = 0.95
...

Missing axes default to 0.90 (gate floor).

HTTP endpoints

Method	Path	Description
POST	/spans/verify	Sign span(s) and return {lambda, axes, pass}
POST	/spans/export	Batch export; returns {total, passed, failed}
GET	/spans/:hash	Retrieve stored receipt for a span hash

Example /spans/verify response

{
  "spanId":      "span-001",
  "lambda":      0.923,
  "axes":        { "moralGrounding": 0.96, ... },
  "pass":        true,
  "receiptHash": "a3f1..."
}

Env vars

Var	Default	Purpose
VSP_PORT	3004	HTTP listen port

Upstream dependency

@szl/ouroboros-lambda-gate — receipt storage and gate evaluation.

Install & test

pnpm install
pnpm test
# Start server
VSP_PORT=3004 node dist/server.js