v4.2 Known Limitations

v4.2.0 Gateway Foundation is released. These limitations are intentional for the stable release and must remain clear until future versions implement more runtime capability.

Runtime

Mock provider only.
No external provider execution.
No live provider fallback.
No runtime retry execution.
No persistent circuit-breaker or health state.
No gateway daemon command.
No public hosted mode.
Localhost-only default binding.

Protocol

Minimal OpenAI-compatible subset only.
No complete OpenAI API compatibility guarantee.
Images, audio, embeddings, and provider-specific extensions are not implemented.
Tool-call behavior is mock-only and does not execute tools.

Observability

In-memory observability only.
No persistent logs.
No metrics database.
No production telemetry exporter.
Prompt and completion content are omitted by default.
Token estimates may be approximate unless provider-reported by the mock provider.
Cost values are estimates from static metadata only.

Clients

Client configuration plans are preview-only.
No global client configuration writes.
No third-party coding agent is installed or executed.
Named client compatibility is not guaranteed unless marked validated-local.

Providers and Routing

Provider registries are metadata-only for external providers.
No provider SDKs are bundled.
No provider credentials are loaded.
No live pricing lookup.
No live provider latency or quota checks.
Deterministic routing is dry-run only.

Governance

Skill OS remains the control plane.
Permission classes are declarative.
Guardrails are advisory unless a specific runtime path implements enforcement later.
Manual npm publication remains maintainer-controlled.