Module graph 

Node-graph policy engine: compiles YAML-declared policies into executable pipelines and validates their structure.

A policy is a directed graph of plugin nodes connected by edges written as from: node_id.port / to: node_id.port (ports: out, success, error, in). Policies referencing supernodes are inlined by expand_policy before compilation. compile_policy produces a CompiledGraph that the data-plane executes per request; validate_policy checks structure first.

Re-exports

pub use engine::compile_policy;

pub use engine::CompiledGraph;

pub use expand::expand_policy;

pub use prepare::prepare_policy;

pub use validation::validate_policy;

pub use validation::validate_supernode;

Modules

engine 🔒

Policy compilation and graph execution.

expand 🔒

Compile-time expansion of supernode instances into flat policies.

prepare 🔒

The pre-compile pipeline shared by the sandbox, the MCP validate_policy tool and config apply: structural validation, config_ref resolution and supernode expansion, in that order.

validation 🔒

Structural validation of policy node graphs, run before compilation (e.g. at config load and on Admin API writes) so malformed policies are rejected with actionable messages instead of failing at request time.