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Start seri

seri opens a full-screen session and stays open. A finished turn returns you to the input box, ready for another task, until you type /exit or press Ctrl-D.

Guided setup

On a real terminal with no provider key configured anywhere, seri opens setup instead of the input box. There are two ways through it. Bring your own key. Pick a provider, paste its key, then pick a model. The model step is not optional, because a key with no model does not leave seri in a runnable state. /setup gets you back here later to add, replace or remove a key. Sign in to a hosted account. /signup creates a seri account and /login signs in, after which you manage no keys at all. A hosted account defaults to openai/gpt-oss-120b through OpenRouter. Setting a provider’s environment variable before you launch skips setup entirely, so GROQ_API_KEY=… seri goes straight to the input box. Providers and models covers all six providers and the three ways to pay for them.

Give it a task

Type what you want done and press Enter.
You can start typing while seri is still starting up. What you type on the splash is queued and submitted once the session is ready. While a turn runs, the session shows elapsed time and token count live, and a panel for any subagent the model dispatched.

The permission gate

Every tool call passes a gate before it runs. /mode cycles the three settings, and Shift-Tab does the same thing without typing. /mode takes no argument. It cycles read-only to approve-each to auto and back around, so from the default one press gets you to auto and the next to read-only. There is no /mode auto. In read-only, a task that needs to write reports the block rather than failing, and the run still exits successfully. When a prompt offers to remember your answer, “always” is scoped to that one tool and to the project you are in. For write_file and edit it persists across sessions. /permissions shows what you have granted for this project and revokes it. Permissions covers the whole model.

Undo what it did

seri records your worktree into a shadow git repository as it works, independent of your own branch, so undoing its work never touches your commit history. n does not mean the same thing to both. /undo counts distinct file states, so three writes in one turn are three steps. /rewind counts points in the conversation, so the same turn is one step.
write_file is always snapshotted first. A bash or powershell command is snapshotted only when it looks destructive, so a change made by a command seri does not recognise is folded into the next snapshot rather than reversible on its own. Checkpoints and undo has the exact rule.

Stopping a turn

The first Ctrl-C cancels the turn that is running and leaves the session resumable. A second one is fatal. Pressed while nothing is running, Ctrl-C is fatal immediately, because there is no turn for it to cancel. /exit and Ctrl-D at the input box both end the session. If a turn is in flight, either one cancels it and waits for it to unwind before exiting, so a tool mid-write is never orphaned. Either way you get the same token and cost summary, accumulated across every turn the session ran.

Where to go next

Permissions

Modes, remembered approvals, and what counts as a write.

Check your code after a write

Feed your own check command’s diagnostics back to the model.

Subagents

Delegate part of a task to its own context window.

Slash commands

Every command in one table.