# if.bus runtime bus spec — external review pack

Generated (UTC): 2026-01-19  
Scope: forward-looking runtime spec for `if.bus` (envelope + control plane) intended to survive a 5-year horizon **without unnecessary breaking changes**.

## Links (no-login)

https://infrafabric.io/llm/products/if-bus/
https://infrafabric.io/llm/products/if-bus/bus-runtime-spec/2026-01-19/index.html
https://infrafabric.io/llm/products/if-bus/bus-runtime-spec/2026-01-19/index.md

## Direct downloads (schemas)

`if.bus` schemas:

https://infrafabric.io/llm/products/if-bus/bus-runtime-spec/2026-01-19/artifacts/schemas/if-bus/envelope.schema.json
https://infrafabric.io/llm/products/if-bus/bus-runtime-spec/2026-01-19/artifacts/schemas/if-bus/dead_letter_event.schema.json
https://infrafabric.io/llm/products/if-bus/bus-runtime-spec/2026-01-19/artifacts/schemas/if-bus/dead_letter_payload.schema.json
https://infrafabric.io/llm/products/if-bus/bus-runtime-spec/2026-01-19/artifacts/schemas/if-bus/runtime_config.schema.json
https://infrafabric.io/llm/products/if-bus/bus-runtime-spec/2026-01-19/artifacts/schemas/if-bus/control_command.schema.json
https://infrafabric.io/llm/products/if-bus/bus-runtime-spec/2026-01-19/artifacts/schemas/if-bus/control_ack.schema.json
https://infrafabric.io/llm/products/if-bus/bus-runtime-spec/2026-01-19/artifacts/schemas/if-bus/budget_event.schema.json
https://infrafabric.io/llm/products/if-bus/bus-runtime-spec/2026-01-19/artifacts/schemas/if-bus/security_signal.schema.json
https://infrafabric.io/llm/products/if-bus/bus-runtime-spec/2026-01-19/artifacts/schemas/if-bus/payload_registry.json
https://infrafabric.io/llm/products/if-bus/bus-runtime-spec/2026-01-19/artifacts/schemas/if-bus/carrier.schema.json
https://infrafabric.io/llm/products/if-bus/bus-runtime-spec/2026-01-19/artifacts/schemas/if-bus/carrier_manifest.schema.json

`if.api` schemas:

https://infrafabric.io/llm/products/if-bus/bus-runtime-spec/2026-01-19/artifacts/schemas/if-api/adapter.schema.json
https://infrafabric.io/llm/products/if-bus/bus-runtime-spec/2026-01-19/artifacts/schemas/if-api/adapter_spec.schema.json

Spec source (repo doc):

https://infrafabric.io/llm/products/if-bus/bus-runtime-spec/2026-01-19/artifacts/spec/85-if-bus-runtime-spec.md

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# if.bus runtime spec (design; not deployed)

This pack is the public copy of the spec + schemas for critique.  
See `artifacts/spec/85-if-bus-runtime-spec.md` for the full text.