Refactor state management into smaller slices

[sudo-tee]

This pull request refactors the codebase to centralize and encapsulate state management by replacing direct access to state variables with method calls on new or existing state submodules (such as state.session, state.model, state.ui, and state.jobs). This improves code maintainability, readability, and reduces the risk of inconsistent state updates.

[Copilot]

Pull request overview

This PR refactors opencode.state into a protected, domain-based state store (UI/session/jobs/model/renderer/context) and updates the core UI/runtime code plus tests to use the new mutation APIs instead of direct state writes.

Changes:

• Introduces a new protected state store (opencode.state.store) and domain-specific state mutation modules (state.ui, state.session, state.jobs, state.model, state.renderer, state.context).
• Updates core runtime modules (UI, renderer, core, server job, context) to mutate state exclusively via domain setters.
• Updates unit/replay/manual tests to align with the new state mutation APIs and adds a direct-write error assertion.

Reviewed changes

Copilot reviewed 50 out of 50 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
tests/unit/zoom_spec.lua	Updates zoom/window state mutations to use state.ui setters.
tests/unit/state_spec.lua	Reworks observable-state tests to use domain setters and adds direct-write error test.
tests/unit/snapshot_spec.lua	Switches active-session state writes to state.session setters.
tests/unit/session_spec.lua	Uses state.jobs.set_api_client instead of direct state.api_client writes.
tests/unit/server_job_spec.lua	Migrates server state manipulation to state.jobs APIs.
tests/unit/render_state_spec.lua	Uses state.renderer.set_messages rather than direct state.messages writes.
tests/unit/persist_state_spec.lua	Refactors multiple state writes to use state.* domains and store.set for generic keys.
tests/unit/permission_integration_spec.lua	Moves message/permission/session setup to state.renderer + state.session.
tests/unit/loading_animation_spec.lua	Uses state.session setters for active session state.
tests/unit/input_window_spec.lua	Updates window/input-content/display-route state mutations to state.ui APIs.
tests/unit/hooks_spec.lua	Migrates active session, user_message_count, and pending permissions mutations to new domains.
tests/unit/event_manager_spec.lua	Uses state.jobs for server state changes.
tests/unit/dialog_spec.lua	Updates window state setup/teardown to state.ui.
tests/unit/cursor_tracking_spec.lua	Moves cursor + window state operations to state.ui and uses store.set for cursor persistence keys.
tests/unit/core_spec.lua	Updates tests to use domain setters and store.set when restoring state keys.
tests/unit/context_spec.lua	Migrates context/session/opening mutations to state.context/state.session/state.ui.
tests/unit/context_bar_spec.lua	Uses state.ui.set_windows for context bar rendering tests.
tests/unit/config_file_spec.lua	Migrates api client setup to state.jobs.set_api_client.
tests/unit/api_spec.lua	Uses state.session for active session and state.jobs for api client; uses state.model for current_model.
tests/unit/api_client_spec.lua	Uses state.context.set_current_cwd instead of direct writes.
tests/replay/renderer_spec.lua	Migrates replay tests to state.session and state.renderer.
tests/minimal/init.lua	Stubs Tree-sitter start in minimal test init to avoid side effects.
tests/manual/renderer_replay.lua	Updates manual replay script to use state.session and state.jobs APIs.
tests/helpers.lua	Uses state.model.set_mode and state.ui.set_windows in test setup.
lua/opencode/variant_picker.lua	Writes selected variant via state.model.set_variant.
lua/opencode/ui/ui.lua	Migrates UI state reads/writes (cursors, windows, hidden snapshots, zoom) to state.ui APIs.
lua/opencode/ui/session_picker.lua	Uses state.session.set_active when deleting current session.
lua/opencode/ui/renderer.lua	Migrates renderer-related state to state.renderer and model/mode to state.model.
lua/opencode/ui/output_window.lua	Uses state.ui cursor/window focus and saved-options setters.
lua/opencode/ui/input_window.lua	Uses state.ui cursor/window focus and input-content setters.
lua/opencode/ui/autocmds.lua	Migrates last-code-window/current-buf and cwd/panel-focused updates to state.ui/state.context.
lua/opencode/state/ui.lua	New UI state domain module (windows, focus, cursors, hidden snapshots, toggle decision logic).
lua/opencode/state/store.lua	New protected store implementation with subscriptions/emits and guarded writes.
lua/opencode/state/session.lua	New session state domain module (active session, restore points, last sent context, counts).
lua/opencode/state/renderer.lua	New renderer state domain module (messages, permissions, stats).
lua/opencode/state/model.lua	New model state domain module (mode/model/variant + overrides).
lua/opencode/state/jobs.lua	New jobs state domain module (job count, server, api client, event manager, CLI version).
lua/opencode/state/init.lua	New opencode.state entry point exposing store + domains and forbidding direct writes.
lua/opencode/state/context.lua	New context state domain module (context config, timestamps, cwd).
lua/opencode/state.lua	Thin wrapper re-exporting opencode.state.init.
lua/opencode/snapshot.lua	Updates restore-point state writes to state.session APIs.
lua/opencode/server_job.lua	Migrates job count + server state mutations to state.jobs.
lua/opencode/quick_chat.lua	Uses state.session.set_active for debug quick-chat session wiring.
lua/opencode/image_handler.lua	Updates context timestamp mutation to state.context.
lua/opencode/event_manager.lua	Uses state.jobs.set_event_manager during setup.
lua/opencode/core.lua	Migrates many state writes (visibility checks, open/close, model/mode, session, context config, job/server) to domains.
lua/opencode/context/chat_context.lua	Updates context timestamp writes to state.context.
lua/opencode/context.lua	Switches current_context_config updates to state.context setters (and refactors ensure logic).
lua/opencode/api.lua	Uses state.ui for window state/visibility/toggle decisions and state.session for active session writes.
lua/opencode/api_client.lua	Uses state.jobs.set_server when ensuring server as fallback.

Comments suppressed due to low confidence (1)

lua/opencode/ui/ui.lua:169

• hide_visible_windows mutates fields on the state.windows table directly (state.windows.input_win = nil, etc.). With the new protected store approach, mutating nested tables bypasses store.set/change notifications and can leave subscribers observing stale window state. Consider updating windows via a dedicated state.ui helper (or re-setting the whole windows table through state.ui.set_windows(...)) instead of mutating nested fields in place.

  state.ui.stash_hidden_buffers(snapshot)
  if state.windows == windows then
    state.windows.input_win = nil
    state.windows.output_win = nil
    state.windows.footer_win = nil
    state.windows.output_was_at_bottom = snapshot.output_was_at_bottom
  end

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[jensenojs]

So, after refactoring the PR, it will be considered for direct merging into the main branch, right?

--

Many of my tasks depend on each other. I can only make each commit as readable as possible, but the overall change may be large. Should I just produce a draft? Even so, that could still make the review process painful.

It might sound a bit odd, but could I create a personal branch here with you? I don't know if it would help our local workflow (I would only create one or two at most), and it would make management easier

I don't have much experience collaborating this way, so please handle it however you're most comfortable. (I also never got the hang of GitHub branch permissions.)

[sudo-tee]

Yes once completed it will be merged to main. I'm almost done. I am using this branch daily and it's pretty stable.

[sudo-tee]

As per branch collaboration usually there is a checkbox when creating a PR where you call allow the owner to make changes. I'm mobile at the moment so I can't really check.

I will try to merge this branch today or tomorrow. So you can start from it