JARVIS PDP

First-party OSS reference implementation of the ARP Policy Decision Point (PDP) service.

This reference implementation uses only the SDK packages: arp-standard-server, arp-standard-model, and arp-standard-client, plus arp-policy and arp-auth.

It is designed to be a thin adapter to your real governance system (rules, OPA, internal policy services), while keeping a stable, spec-aligned request/response schema.

Implements: ARP Standard spec/v1 PDP API (contract: ARP_Standard/spec/v1/openapi/pdp.openapi.yaml).

Requirements

• Python >= 3.11

Install

python3 -m pip install -e .

Local configuration (optional)

For local dev convenience, copy the example env file:

cp .env.example .env.local

src/scripts/dev_server.sh auto-loads .env.local (or .env).

Run

• PDP listens on http://127.0.0.1:8086 by default.

python3 -m pip install -e .
python3 -m jarvis_pdp

Using this repo

To build your own PDP, fork this repository and replace the decision logic while preserving request/response semantics.

If all you need is to change policy behavior, edit:

• src/jarvis_pdp/service.py

Default behavior

• Deny-by-default when no profile or policy file is configured.
• JARVIS_POLICY_PROFILE=dev-allow enables allow-all behavior for local dev.
• JARVIS_POLICY_PATH loads an arp-policy JSON policy file.
• When a policy file is configured and a request includes node_type_ref, PDP fetches the NodeType from Node Registry and enriches the policy context (so callers do not need to embed NodeType metadata in the request).

Example policy: first-party atomic only

This repo includes an example arp-policy file that allows:

• composite nodes (e.g. jarvis.composite.planner.general)
• atomic nodes only when jarvis.trust_tier == "first_party"

See: src/scripts/policy.first_party_atomic_only.json

To use it:

export JARVIS_POLICY_PATH=src/scripts/policy.first_party_atomic_only.json

Quick health check

curl http://127.0.0.1:8086/v1/health

Configuration

CLI flags:

• --host (default 127.0.0.1)
• --port (default 8086)
• --reload (dev only)

Environment variables (Node Registry hydration):

• JARVIS_NODE_REGISTRY_URL (enables NodeType metadata hydration for node-type policy decisions)
• JARVIS_NODE_REGISTRY_AUDIENCE (default arp-jarvis-noderegistry)
• Outbound STS credentials (required when JARVIS_NODE_REGISTRY_URL is set):
  • ARP_AUTH_CLIENT_ID
  • ARP_AUTH_CLIENT_SECRET
  • ARP_AUTH_TOKEN_ENDPOINT (or ARP_AUTH_ISSUER + discovery)

Validate conformance (arp-conformance)

python3 -m pip install arp-conformance
arp-conformance check pdp --url http://127.0.0.1:8086 --tier smoke
arp-conformance check pdp --url http://127.0.0.1:8086 --tier surface

Helper scripts

• src/scripts/dev_server.sh: run the server (flags: --host, --port, --reload).

• src/scripts/send_request.py: send a policy decision request from a JSON file.

  python3 src/scripts/send_request.py --request src/scripts/request.json
  

Authentication

Auth is enabled by default (JWT). To disable for local dev, set ARP_AUTH_PROFILE=dev-insecure.

To enable local Keycloak defaults, set:

• ARP_AUTH_PROFILE=dev-secure-keycloak
• ARP_AUTH_AUDIENCE=arp-pdp
• ARP_AUTH_ISSUER=http://localhost:8080/realms/arp-dev

Upgrading

When upgrading to a new ARP Standard SDK release, bump pinned versions in pyproject.toml (arp-standard-*==...) and re-run conformance.