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Documents Stack 0.2.0-dev.20260703.2. Expanded in the 2026-07-03 changelog entry — Lights panel, slash commands, gardener core focus, and goal-mode chat availability.
Stack is a terminal cockpit: Agent input on the bottom, status rails on the sides, and a center pane that switches between goal views, transcripts, and ops panels.

Launch

Stack auto-starts stackd on 127.0.0.1:8792 when healthy. See stackd.

Agent input

Codex is the default harness. Configure it in Quickstart § Configure with Codex.

Slash commands

Type / in the active input to open the slash menu. Current commands:

Lights panel

/lights on opens the right-panel cockpit without changing the active core panel. The Threads section is scrollable and filterable by status, role, viewed/unviewed state, id, or text. Selecting a worker thread opens the worker lane; selecting a gardener thread opens the gardener in the core panel. Lights also summarizes gardener inbox/target, active actor counts, hosted cloud state, local runtime state, and account usage.

Agent Bridge (x)

Press x to toggle local-only vs remote-only bridge mode. Keep modes separate so Codex does not mix local service actions with remote owner-route actions. Start remote ops with the stack_status MCP tool (see Stack MCP).

Environment (dev / staging / prod)

When the environment control is focused: Set API keys per environment in Configuration.

Local Research (GEPA)

When Local Research is focused: See Optimizers for task setup.

Hosted optimizers

When hosted optimizers are focused:

Remote SMR and Factory

When Remote SMR is focused: Downloads persist under .stack/downloads/<environment>/<run-id>/ and survive TUI restarts.

Ops panel modes

Press p on the ops panel to cycle Actors → Local → Synth Hosted. Actors shows Codex subagent policy, primary actor state, and transcript-derived workers. Press enter in Actors mode to toggle subagents for the next launch (when STACK_CODEX_ARGS is not locked).

Sessions and logs

Stack writes session logs under .stack/sessions/. Remote visibility includes SMR runs, WorkProducts, artifacts, Factories, and hosted optimizer jobs for the selected environment.

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