gito/docs/architecture.md

Architecture

Gito starts as a modular monolith with separable process roles. The codebase can run as one service at first, but its boundaries should allow separate server and worker deployments later. Agent interaction UI is provided by the sibling ../agent-shell Flutter package, and the agent backend/runtime is owned by the sibling ../iop project.

Layers

Control Plane

• Owns external REST API/webhook surfaces and internal proto-socket surfaces.
• Accepts user, automation, and provider callback requests.
• Applies auth, policy, and approval gates.
• Creates operations and delivers normalized events.
• Does not execute Git commands directly.

Core Domain

• Owns repository registry, workspace leases, operations, revision cursors, idempotency keys, audit records, and normalized events.
• Knows provider-neutral concepts such as Repo, WorkspaceLease, GitOperation, RevisionEvent, and ChangeRequest.
• Does not know GitHub, GitLab, Gitea, Plane, Jira, or IOP HTTP details.

Worker

• Picks pending operations.
• Coordinates workspace leases.
• Coordinates with the IOP backend/runtime for agent execution results.
• Records operation outcomes and emits events.
• Handles retry and backoff policy.

Agent Shell Package And IOP Backend

• ../agent-shell is a product-agnostic Flutter UI/domain package.
• Flutter hosts attach it as an agent_shell: path: ../agent-shell package dependency rather than treating Gito as the agent UI package.
• ../iop owns the backend/runtime that executes agents, shell commands, and model/runtime orchestration.
• Gito does not execute arbitrary workspace commands directly.
• Gito records IOP backend results as operation state, Git revision, and event records.

Git Engine

• Platformless Git operation layer.
• Supports clone, fetch, pull, checkout, status, diff, commit, push, branch, tag, and revision scans.
• Must be testable against local bare repositories without GitHub, GitLab, or Gitea.

Provider Adapters

• Own platform APIs and DTOs.
• Map Forgejo/Gitea PR, GitHub PR, and GitLab MR into provider-neutral ChangeRequest operations.
• Treat webhooks as wakeup signals. Final state must be verified through Git revision or provider read APIs.
• MVP priority is Forgejo push intake: provider webhooks enter through REST callbacks, then Gito records normalized branch events. External consumers receive them through signed HTTP webhook delivery, not proto-socket.

Transport

• REST is the external integration surface for provider callbacks, public APIs, HTTP webhook delivery, health/readiness, smoke/curl, and simple bootstrap endpoints.
• proto-socket is internal-only control/runtime transport. It is not an external integration contract and is not offered as a fallback consumer transport.
• gRPC is intentionally out of scope for the initial architecture.

Event Policy

All external side effects should produce durable operation and event records in PostgreSQL. Redis may be added later for fanout or stream acceleration, but it is not the source of truth.