.tmux.conf

# tmux configuration
# Fixed version addressing configuration issues

# ===============
# Basic Settings
# ===============

# Set prefix to Ctrl-Space
unbind C-b
unbind C-Space 
set -g prefix C-Space
bind C-Space send-prefix

# Performance and behavior settings
set -g history-limit 50000
set -s escape-time 0  # Fast escape (consistent setting)
set -g assume-paste-time 0

# status-interval + window-status-format overrides for tmux-agentbar live
# AT THE BOTTOM of this file (after TPM init), because Dracula's plugin
# clobbers these when it loads.

# Colors and display
set -g default-terminal "tmux-256color"
set -ag terminal-overrides ",xterm-ghostty:Tc,xterm-256color:Tc"

# Start windows and panes at 1, not 0
set -g base-index 1
set -g pane-base-index 1
set-window-option -g pane-base-index 1
set-option -g renumber-windows on

# Don't let programs rename windows via escape sequences
set-option -g allow-rename off

# Auto-name windows after the current directory. The "agent here" robot
# glyph is injected by tmux-agentbar's window-status script (process-tree
# detection catches claude, copilot, aider, codex, gemini, etc. — not just
# claude's version-string process title). Window name stays as bare dirname.
set-option -g automatic-rename on
set-option -g automatic-rename-format "#{b:pane_current_path}"
# Bell handling — tmux-agentbar fires \a on `waiting`/`done` via Claude Code hooks.
# `monitor-bell on` + `window-status-bell-style` flips only the originating tab
# into reverse video until you focus it, so a multi-window Claude session tells
# you WHICH window needs attention (vs visual-bell's one-shot whole-bar flash).
set -g visual-bell off
set -g monitor-bell on
set -g bell-action any
set -g activity-action none
set -g window-status-bell-style 'reverse,bold'

# Enable mouse control
set -g mouse on

# Allow passthrough escape sequences (for images, Claude Code notifications, progress bars)
set -g allow-passthrough on
# Let tmux distinguish Shift+Enter from Enter so Claude Code's newline works inside tmux
# (per https://code.claude.com/docs/en/terminal-config#configure-tmux)
set -s extended-keys always
set -as terminal-features 'xterm*:extkeys'

# ===============
# Key Bindings
# ===============

# Session management
bind-key N new-session

# Reload config file
bind r source-file ~/.tmux.conf \; display-message "Config reloaded..."

# Per-directory Claude Code popup — prefix + y
# Session name is derived from the MD5 of the current path, so the same directory
# always reattaches to the same Claude session across invocations.
bind -r y run-shell '\
  SESSION="claude-$(echo #{pane_current_path} | md5 -q | cut -c1-8)"; \
  tmux has-session -t "$SESSION" 2>/dev/null || \
  tmux new-session -d -s "$SESSION" -c "#{pane_current_path}" "claude"; \
  tmux display-popup -w80% -h80% -E "tmux attach-session -t $SESSION"'

# Lazygit popup — prefix + g. Scoped to current pane's cwd.
# Default prefix + g is "choose session by name", which I have prefix + s / o for.
bind -r g display-popup -E -w 90% -h 90% -d "#{pane_current_path}" "lazygit"

# Ephemeral shell peek — prefix + Enter.
# Quick shell at the current pane's cwd without creating a new window.
# Exits back when you `exit` or Ctrl-D.
bind Enter display-popup -E -w 80% -h 80% -d "#{pane_current_path}" "zsh"

# Personal cheat sheet — prefix + ? (overrides native "list-keys -N" which is too verbose).
# Rendered with glow (proper markdown: headings, tables, code blocks) when available,
# falls back to bat until `brew install glow` completes. Press q to exit.
bind '?' display-popup -E -w 90% -h 90% "if command -v glow >/dev/null 2>&1; then glow -p ~/projects/dotfiles/tmux-help.md; else bat --paging=always --style=plain --language=markdown ~/projects/dotfiles/tmux-help.md; fi"

# Local-LLM chat menu — prefix + a. Pops a model picker; each entry opens or
# reattaches a persistent ollama scratch session in a popup. Conversation
# history is per-model (each model gets its own tmux session), so you can
# park a coding thread in qwen3-coder while running quick Q&A in gemma3.
# Override default tmux `prefix + a` (last-pane, rarely used).
#
# Rebuilt 2026-08-11 from the compile-and-run bench, which grades by actually
# building and executing each model's output (bench-results/m1-max-64gb.md).
# Every entry below scored 3/3; nothing untested is offered.
#
#   gemma4:26b        3/3  58.2 tok/s  17 GB   default — MoE, ~4B active, so it
#                                              runs at 7B latency despite size
#   qwen3-coder:30b   3/3  74.0 tok/s  18 GB   fastest; base for the agentic
#                                              ctx64k variant used by OpenCode/Pi
#   gpt-oss:20b       3/3  62.2 tok/s  13 GB   128K context, tunable reasoning
#   gemma4:12b        3/3  27.8 tok/s  7.6 GB  small footprint, slower
#
# Dropped from the menu: qwen2.5-coder:7b — it was the DEFAULT and scores 1/3,
# failing both Kotlin (unresolved reference) and Swift (@main misuse).
# mistral:7b and gemma3:4b are dropped as never benched on this suite; both are
# still installed, so pass them to ai-popup.sh directly if you want them.
#
# Note gpt-oss:20b was previously deleted here as an underperformer. It now
# scores 3/3 — that was an older build, so the old note no longer holds.
bind a display-menu -T "#[align=centre] AI chat — pick a model " -x C -y C \
  "gemma4:26b (default, 3/3, 58 tok/s)"      g "run-shell '~/projects/dotfiles/ai-popup.sh gemma4:26b'"      \
  "qwen3-coder:30b (3/3, fastest 74 tok/s)"  c "run-shell '~/projects/dotfiles/ai-popup.sh qwen3-coder:30b'" \
  "" \
  "gpt-oss:20b (3/3, 128K ctx, reasoning)"   o "run-shell '~/projects/dotfiles/ai-popup.sh gpt-oss:20b'"     \
  "gemma4:12b (3/3, small 7.6 GB)"           l "run-shell '~/projects/dotfiles/ai-popup.sh gemma4:12b'"

# Pane management
unbind x
bind x resize-pane -Z  # Zoom/maximize pane

# Split windows with intuitive keys
bind | split-window -h -c "#{pane_current_path}"
bind _ split-window -c "#{pane_current_path}"

# Resize panes
bind C-l resize-pane -R 10
bind C-j resize-pane -D 10
bind C-h resize-pane -L 10
# Note: Removed C-k binding to avoid conflicts
bind C-u resize-pane -U 10  # Changed from C-k to C-u

bind * resize-pane -x 80

# Swap panes
bind ) swap-pane -D
bind ( swap-pane -U

# Synchronize panes
bind = setw synchronize-panes

# Layout management
bind-key @ select-layout even-horizontal
bind-key ! select-layout even-vertical
bind l select-layout -n
bind L select-layout -p

# Pane navigation with Alt-arrow (no prefix needed)
bind -n M-Left select-pane -L
bind -n M-Right select-pane -R
bind -n M-Up select-pane -U
bind -n M-Down select-pane -D

# Outer navigation with Shift+Alt+arrow (no prefix needed).
# Horizontal = windows (siblings), Vertical = sessions (cousins).
# Mnemonic parity with Alt+arrow for panes.
bind -n M-S-Left  previous-window
bind -n M-S-Right next-window
bind -n M-S-Up   switch-client -p
bind -n M-S-Down switch-client -n

# Double prefix toggles last window (`Ctrl-Space Ctrl-Space`). Restores the
# tmux default `prefix + l` behavior, which I lost when I remapped `l` to
# `select-layout -n`. Useful for ping-ponging between two windows.
bind C-Space last-window

# Cycle through panes with double prefix
unbind ^A
bind ^A select-pane -t :.+

# Clear pane (safer binding that doesn't conflict)
bind -n C-M-k send-keys -R \; clear-history

# Pane title management
bind-key t command-prompt -p "Rename pane:" "select-pane -T '%%'"
bind-key T if -F '#{?#{==:#{pane-border-status},off},0,1}' 'set pane-border-status off' 'set pane-border-status top'

# ===============
# Plugin Configuration
# ===============

# TPM Plugin list
#
# tmux-continuum MUST be last: it auto-saves by injecting a hook into
# status-right, and any plugin loaded after it that also sets status-right
# (Dracula does) silently wipes the hook → auto-save stops, restores serve
# whatever the last successful save was. See tmux-continuum README.
set -g @tpm_plugins '          \
   tmux-plugins/tpm             \
   tmux-plugins/tmux-sensible   \
   tmux-plugins/tmux-resurrect  \
   dracula/tmux                 \
   omerxx/tmux-sessionx         \
   tmux-plugins/tmux-continuum  \
'

# sessionx — fuzzy session/window picker in a tmux popup.
# Bound to `prefix + o` (overrides default rotate-pane-forward, which I don't use).
# Complements `prefix + s` (native, kept as fallback) and the `s` shell function.
set -g @sessionx-bind 'o'
set -g @sessionx-zoxide-mode 'on'
set -g @sessionx-window-mode 'on'
set -g @sessionx-preview-enabled 'true'
set -g @sessionx-filter-current 'false'
set -g @sessionx-prompt ' ⚡ '

# Plugin settings
# Continuum auto-saves session/window/pane state and restores it on tmux start.
# combined with @continuum-boot below, this means: reboot → open iTerm →
# tmux launches → all sessions/windows/layouts/cwds back where you left them.
# Note: running processes in panes (claude, npm dev, etc.) are NOT auto-resumed —
# panes come back as fresh shells at the right cwd.
set -g @continuum-restore 'on'
set -g @continuum-save-interval '5'
set -g @continuum-boot 'on'
set -g @continuum-boot-options 'iterm,fullscreen'
set -g @resurrect-capture-pane-contents 'on'
set -g @resurrect-strategy-vim 'session'

# Dracula theme settings
set -g @dracula-show-powerline true
set -g @dracula-show-flags true
set -g @dracula-plugins "cpu-usage ram-usage time"
set -g @dracula-left-icon-padding 0
set -g @dracula-military-time true

# ===============
# macOS Compatibility
# ===============

# Modern macOS doesn't need reattach-to-user-namespace
# Only set if the utility exists (for older systems)
if-shell 'command -v reattach-to-user-namespace >/dev/null 2>&1' \
    'set-option -g default-command "reattach-to-user-namespace -l $SHELL"' \
    'set-option -g default-command "$SHELL"'

# ===============
# Plugin Manager Initialization
# ===============

# Initialize TPM (keep at bottom) - with error handling
if-shell 'test -f ~/.tmux/plugins/tpm/tpm' \
    'run ~/.tmux/plugins/tpm/tpm' \
    'display-message "TPM not installed. Run: git clone https://github.com/tmux-plugins/tpm ~/.tmux/plugins/tpm"'

# ===============
# Post-plugin overrides (must come AFTER TPM init)
# ===============
# Dracula's tmux plugin sets window-status-format and status-interval when it
# loads, so any values we set earlier get clobbered. Re-apply here so the
# tmux-agentbar icon shows up AND the spinner animates at 1s cadence.
#
# The format preserves Dracula's colors (#44475a bg, #f8f8f2 fg for normal;
# #6272a4 bg for current) and just injects the agent icon between #W and the
# window flags.
set -g status-interval 1
# The `` glyphs (U+E0B0) are Dracula's powerline chevrons that transition
# between the current tab's purple bg and the surrounding dark bg. Don't drop
# them — if your editor shows a box, make sure the terminal font is a Nerd
# Font (IosevkaTermNF here) and the file is UTF-8.
setw -g window-status-format         "#[fg=#f8f8f2]#[bg=#44475a] #I #(~/projects/dotfiles/tmux-agentbar/scripts/agentbar-window-status.sh #I)#W#{?window_flags,#[fg=#6272a4]#{window_flags},}"
setw -g window-status-current-format "#[fg=#44475a,bg=#6272a4]#[fg=#f8f8f2,bg=#6272a4] #I #(~/projects/dotfiles/tmux-agentbar/scripts/agentbar-window-status.sh #I)#W#{?window_flags,#[fg=#bd93f9]#{window_flags},} #[fg=#6272a4,bg=#44475a]"