> For AI agents: the complete documentation index is available at /llms.txt, the full documentation bundle is available at /llms-full.txt. # Beto boundaries Start with the [Project directory](/reference/services/beto/contexts/project/README.md) for its query, read model and provider limitations. Shared adaptors contain technical mechanisms. | Folder | Responsibility | | ----------------------- | ---------------------------------------------------------------------------------------------------------------------------- | | `command/` | Plain handler execution with a per-invocation write repository, immutable prepared projections and explicit realtime intent. | | `persistence/postgres/` | Database ownership, atomic state/receipt/outbox writes, projection bytes and fenced dispatch leases. | | `messaging/amqp/` | RabbitMQ connections, confirmed publication, acknowledgements and topology declaration. | | `messaging/requests/` | Typed request envelopes, complete command/query registration and reconnecting request workers. | | `messaging/workers/` | Event consumption, durable private commands, committed replies and fenced outbox delivery. | | `realtime/` | Delivery of saved projection bytes to the restricted realtime gateway. | | `http/operational/` | Health/diagnostic responses and authentication. | Context adaptors own wire-to-application mapping and read repositories. Project's static repository lives under `contexts/project/adaptors/persistence/mock`. Foundation packages retain domain/application primitives, configuration, diagnostics and cancellation timing. Fx registrations stay in `services/beto/di`. Project has no write commands or events. Its named query handler is registered in the composition root through a generated response-bound registration. Its schema owns plain input/response models, query/reply identifiers and mechanical wire mappings. The shared registry routes plain application values through `QueryBusPort`. Registration covers every declared request before workers start. Commands use `services/commandregistration` to bind a plain `FeatureHandler` factory to one `AggregateTransaction`. Handlers receive `CommandContext`, generated input and an owner `WriteRepository.Get/Save` capability. The transaction owns locking, version checks, durable receipts, outcomes and outgoing intent. Repository and realtime bus capabilities expire when the invocation ends. `CommandStore`, `CommandPort`, `Fact` and the old HTTP command/query helpers have been removed. Saving stages private domain facts through the owner's mapper. An integration publication subscriber commits its own receipt and encoded event, preserving the source aggregate revision and occurrence time. A command reaction commits exact private command bytes before a paired consumer executes them. Public commands commit their exact reply bytes alongside their outcome; the reply relay confirms delivery independently. Query replies retain confirmed publication before ACK. Each owner's query queue has four consumers, each with one outstanding request and its own reply publisher. Independent reads can progress while another waits on a provider. Cancellation drains all consumers and leaves unfinished reads available for redelivery. Command queues retain one consumer. Realtime publication is explicit. Each message selects a canonical Project or Party audience, or a principal subject for a private outcome. Command snapshots must match committed state; rejection messages must match the recorded outcome and use a principal target. The gateway derives channels from the target. Subscribers have a separate receipt/outbox boundary. Saving a root alone creates no browser publication. ## Development checks - `pnpm check:beto`: formatting, architecture, generated drift, historical compatibility, Go vet, pinned Staticcheck and errcheck. This is also part of `pnpm verify`. - `pnpm generate:beto`: regenerate Beto's contracts, copied migration baselines and broker catalogue. `--category requests` selects one output family. - `python3 scripts/beto_native_integration.py`: isolated native PostgreSQL with restricted runtime credentials, race detection and transaction/recovery fixtures. - `pnpm check:contracts:beto`: compare generated files in a temporary directory, including missing and obsolete outputs, without changing the checkout. Generated files live under `generated/` or use `.generated.json`. Beto contains its technical envelopes and Project query bindings; Execution Core projection bindings belong to Metallo. Shared migration copies retain their exact SQL bytes. The foundation follows the Storefront Go service at reference commit `a9d7bf6` in `ddd-hexagonal-cqrs-es-eda-microservices-multilingual`. Pharos retains its UUID salt, wire identities, broker routes and current-state storage. Frozen platform SQL baselines remain byte-identical; Beto's checksummed `0003_delivery.sql` adds command/reply outboxes and explicit realtime support to its persisted contexts. Project remains storage-free, with no commands, event subscriptions or browser publication authority. Project-specific source selection and provisioning remain intentional. Request annotations generate public/private inputs, required presence rules, responses, shared `PageRequest`/`Outcome`/`Rejection` values and direct handler registrations. Event declarations generate plain values, codecs and catalogues; `contracts/subscriptions.json` generates the complete graph, paired command queues and replay membership. These registries are empty for Project. Application code imports only its owner's plain contracts and shared value types. Typed Go AST checks reject transaction callbacks in application code, chained handlers and mutation outside command handlers. `check:beto` compares published Project schemas against commit `adb80196ea1c`, independently of generated-file drift. Existing request/reply byte fixtures cover queued bytes. API's `mappings/project.json` supplies its explicit HTTP translation; the JSON model and mechanical Protobuf mapping are generated from that mapping and the HTTP/Protobuf contracts.
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