Keybindings

Inside a hosted session (constant host), the default prefix is Ctrl-B. Press it, release, then a key.

Keys	Action
`Ctrl-B` `c`	Continue in Claude Code, refreshing the existing projection
`Ctrl-B` `C`	Create a new Claude continuation
`Ctrl-B` `x`	Continue in Codex, refreshing the existing projection
`Ctrl-B` `X`	Create a new Codex continuation
`Ctrl-B` `o`	Continue in OpenCode, refreshing the existing projection
`Ctrl-B` `O`	Create a new OpenCode continuation
`Ctrl-B` `t`	Toggle the trail graph (inside it: `c`/`x`/`o` switch, `r` renames, `q` closes)
`Ctrl-B` `:`	Open the command line (`switch claude`, `new opencode`, `rename …`, `quit`)
`Ctrl-B` `d`	Quit — the hosted CLI exits with it
`Ctrl-B` `Ctrl-B`	Send a literal `Ctrl-B` to the child runtime

Lowercase refreshes the existing projection for that runtime; uppercase creates a new continuation. See Carrying a thread for continue vs. new.

In the command line, Tab completes verbs and runtime names, rename + Tab prefills the conversation's current name, and ↑/↓ recall history.

Changing the prefix

If you are already inside tmux, Ctrl-B is taken. Pick another:

constant host codex --prefix C-t
CONSTANT_PREFIX=C-t constant host codex

Debugging the prefix

constant keys

This prints the raw bytes for each key. Codex enables the Kitty keyboard protocol, so Ctrl-B can arrive as an escape sequence rather than a raw byte; Constant recognizes both the legacy and Kitty encodings.