Contract Philosophy
Each module defines explicit guarantees so integration behavior remains deterministic, testable, and safe under policy and credential constraints.
Module Guarantees
- Parser + context: strict identity parsing and deterministic route partitions, including derived orbit awareness.
- Credential + token: HMAC integrity checks, expiry bounds, token binding, compact token verification.
- Policy engine: closed-by-default decisions with explicit denial reasons and optional orbit compatibility checks.
- Packet schema: typed packet route/auth contracts with JSON and binary header alignment.
- Telemetry + CTS: ordered event collection, heartbeat validity, and typed cognitive training telemetry contracts.
Module Expectations
Upstream callers must provide valid identity tokens and request permissions that map to known policy rules. Downstream modules must preserve contract fields without implicit mutation.
Module Refusal Conditions
- Malformed identity token or unsupported scale/domain.
- Invalid or expired credential signature.
- Missing permission scope or unmet orbit compatibility constraints.
- Unknown permission types (denied by fallback policy branch).
Inter-Module Dependencies
Flow dependency is parser → context → credential verification → policy evaluation → service action, with telemetry and failure handling spanning every stage.
Versioning Strategy
Contract changes are versioned through packet schema versions, token header ver markers, and documented module updates in repository specs.