c2: send one prompt to both Claude Code and Codex in side-by-side Warp panes

c2.zsh

# c2: pick a project (same switcher as cc/cx), then run Codex in THIS pane and
# Claude in a new split pane to the right - both seeded with the same prompt.
# Companion to https://wow.pjh.is/journal/claude-code-project-switcher
# Usage: c2 <prompt...>             (interactive picker, then both agents)
#        c2 3 <prompt...>           (quick-select project/recent slot 3)
#        c2 r2 <prompt...>          (quick-select recent-dir slot 2)
#        c2                         (no prompt -> opens $EDITOR; or pipe via stdin)
c2() {
    if [[ "$TERM_PROGRAM" != "WarpTerminal" ]]; then
        echo "c2: built for Warp - the second pane is created with Warp's split shortcut." >&2
    fi

    local select_arg=""
    case "$1" in
        [1-9]|r[1-9]) select_arg="--select $1"; shift ;;
    esac

    local prompt="$*"
    if [ -z "$prompt" ]; then
        if [ ! -t 0 ]; then
            prompt="$(cat)"
        else
            # No prompt on the command line: compose one in $EDITOR. macOS Cmd-
            # based line editing (Cmd+Left, Cmd+Backspace) and Shift+Enter only
            # work in a GUI editor - terminal line readers never receive Cmd
            # chords. $EDITOR may carry args (e.g. "code --wait"), which zsh
            # won't word-split, so use ${=...}; fall back to vi if missing.
            local edit ed
            edit=$(mktemp /tmp/c2-edit.XXXXXX)
            ed=${EDITOR:-vi}
            command -v ${ed%% *} >/dev/null 2>&1 || ed=vi
            ${=ed} "$edit"
            prompt="$(cat "$edit")"
            rm -f "$edit"
        fi
    fi
    if [ -z "${prompt//[[:space:]]/}" ]; then
        echo "c2: no prompt provided." >&2
        return 1
    fi

    local result
    result=$(python3 ~/.agents/scripts/agents/coding_agent_launcher.py "$PWD" ${=select_arg})
    local exit_code=$?
    if [ $exit_code -ne 0 ] || [ -z "$result" ] || [ ! -d "$result" ]; then
        return $exit_code
    fi
    _agent_record_recent_dir "$result"

    # Stash the prompt and a self-cleaning runner so the new pane only ever has a
    # plain /tmp path typed into it (no quotes/parens for Warp's editor to mangle).
    local promptfile runner
    promptfile=$(mktemp /tmp/c2-prompt.XXXXXX)
    runner=$(mktemp /tmp/c2-claude.XXXXXX)
    printf '%s' "$prompt" > "$promptfile"
    cat > "$runner" <<RUNNER
#!/bin/zsh
cd ${(q)result}
claude --model opus "\$(cat ${(q)promptfile})"
rm -f ${(q)promptfile} ${(q)runner}
RUNNER
    chmod +x "$runner"

    cd "$result"

    # Split right (Cmd+D), run the runner in the new pane, refocus this pane
    # (Ctrl+[ = pane_group:navigate_prev). Tune the post-split delay if the first
    # characters get dropped on a slow shell start.
    osascript - "$runner" <<'APPLESCRIPT'
on run argv
    set runnerPath to item 1 of argv
    tell application "Warp" to activate
    delay 0.2
    tell application "System Events"
        keystroke "d" using command down
        delay 1.0
        keystroke runnerPath
        delay 0.1
        key code 36
        delay 0.2
        key code 33 using control down
    end tell
end run
APPLESCRIPT
    if [ $? -ne 0 ]; then
        echo "c2: couldn't drive Warp - grant Accessibility to Warp in System Settings > Privacy & Security > Accessibility, then retry. Running Codex only." >&2
        rm -f "$promptfile" "$runner"
    fi

    codex "$prompt"
}