diff --git a/README.md b/README.md
index 63172b0..735604a 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@ abbreviation system for keyboard-driven workflows.
 ## Table of Contents
 
 - [Overview](#overview)
+- [Session Logging](#session-logging)
 - [Documentation](#documentation)
 - [Installation](#installation)
 - [Personalization](#personalization)
@@ -27,10 +28,71 @@ This config layers on top of the CachyOS base Fish configuration and adds:
 - **Smart CLI wrappers** that prefer modern tools (`eza`, `bat`, `btop`, `dust`, `prettyping`) with graceful fallbacks
 - **Auto Python venv** activation on directory change (direnv-aware)
 - **Kitty terminal** deep integration for splits, tabs, and SSH
+- **Automatic session logging** — terminal scrollback, multiplexer panes (tmux/zellij), and AUR-helper output are captured to `~/.terminal_history` (see the caution below and [Session Logging](#session-logging))
 - **AI workflow** helpers for Claude and Antigravity session management
 - **WakaTime** shell activity tracking
 - **Opt-out toggles** for every opinionated component — see [Minimal Mode](#minimal-mode)
 
+> [!CAUTION]
+> **This configuration logs your terminal sessions to disk by default.**
+> Out of the box it silently captures terminal output to `~/.terminal_history`:
+> Kitty scrollback when a window closes, live tmux pane streams, zellij pane
+> snapshots on exit, and full `paru`/`yay` output. These logs can contain
+> command output, file contents, and anything else printed to your terminal.
+> Nothing is sent off your machine, but the files persist locally until pruned.
+>
+> To turn all logging off, set the C5 category variable:
+>
+> ```fish
+> set -U __fish_config_op_logging off
+> ```
+>
+> Or run **`config-toggle`** for an interactive menu to flip logging (and any
+> other opinionated category) on or off — no variable names to remember.
+>
+> This takes effect immediately in every open shell. See [Session Logging](#session-logging)
+> for exactly what is captured and where, and [Minimal Mode](#minimal-mode) for the
+> full set of opt-out toggles.
+
+---
+
+## Session Logging
+
+This config captures terminal output to `~/.terminal_history` (override with
+`$SCROLLBACK_HISTORY_DIR`) so you can search back through past sessions. It is
+**on by default**. Five sources feed it:
+
+| Source | When it captures | Log file |
+|---|---|---|
+| Kitty scrollback | When a Kitty window/tab closes | `scrollback_<timestamp>.log` |
+| tmux pane | Continuously while the pane is open (`pipe-pane`) | `tmux_<session>-w<win>-p<pane>_<timestamp>.log` |
+| zellij pane | Snapshot taken on shell exit (`dump-screen`) | `zellij_<session>-p<pane>_<timestamp>.log` |
+| `paru` wrapper | Every `paru` invocation | `paru_<timestamp>.log` |
+| `yay` wrapper | Every `yay` invocation | `yay_<timestamp>.log` |
+
+Old logs are pruned automatically to stay within `$SCROLLBACK_HISTORY_MAX_FILES`
+(default 100) per source, and empty/trivial captures are discarded.
+
+**These logs can contain secrets** — anything printed to your terminal (command
+output, file dumps, tokens echoed to stdout) ends up in them. They never leave
+your machine, but treat `~/.terminal_history` as sensitive.
+
+Disable all of it with a single universal variable:
+
+```fish
+set -U __fish_config_op_logging off   # disable; takes effect in every open shell
+set -Ue __fish_config_op_logging      # re-enable (erase the override)
+```
+
+Prefer an interactive interface? Run **`config-toggle`** for a full-screen
+picker that flips logging — and every other opinionated category — on or off
+per session or universally, without memorizing variable names.
+
+Disabling also removes the generated `paru`/`yay` log wrappers and tells the
+Kitty watcher to skip capture via a sentinel file — no shell or terminal
+restart required. Logging is category **C5** in [Minimal Mode](#minimal-mode);
+`set -U __fish_config_opinionated 0` turns it off along with everything else.
+
 ---
 
 ## Documentation
diff --git a/docs/fish-config.md b/docs/fish-config.md
index 712c526..dea563f 100644
--- a/docs/fish-config.md
+++ b/docs/fish-config.md
@@ -32,12 +32,27 @@ A production-grade Fish shell configuration targeting Fish 4.x. It provides:
 - Drop-in replacements for common Unix tools (ls, cat, rm, du, ping, less)
 - Deep Kitty and WezTerm terminal integration: tab/window/pane management from
   the command line
-- Scrollback history snapshots saved to ~/.terminal_history on session exit
+- Automatic session logging: terminal scrollback, tmux/zellij panes, and
+  paru/yay output captured to ~/.terminal_history (on by default; see below)
 - Automatic Python virtualenv activation on directory change
 - Cross-platform package management via pkg and fish-deps
 - AI session helpers for Claude Code and Antigravity
 - Catppuccin Mocha color theme throughout
 
+  ┌───────────────────────────────────────────────────────────────────────────┐
+  │ CAUTION - SESSION LOGGING IS ON BY DEFAULT                                │
+  │                                                                           │
+  │ This configuration silently records terminal output to                    │
+  │ ~/.terminal_history: Kitty scrollback on window close, live tmux pane     │
+  │ streams, zellij pane snapshots on exit, and full paru/yay output. These   │
+  │ logs can contain command output, file contents, and secrets printed to    │
+  │ the terminal. Nothing leaves your machine, but the files persist locally. │
+  │                                                                           │
+  │ Disable all logging with:  set -U __fish_config_op_logging off            │
+  │ Prefer a menu? Run the interactive picker:  config-toggle                 │
+  │ See Section 7 (C5 - Logging and Capture) for the full breakdown.          │
+  └───────────────────────────────────────────────────────────────────────────┘
+
 The configuration is split across:
 
     config.fish               Main entry point; sets env vars and PATH
@@ -51,6 +66,8 @@ The configuration is split across:
       logging-events.fish     C5 --on-variable event handlers; syncs logging state at startup
       paru-wrapper.fish       Auto-generates ~/.local/bin/paru logging wrapper
       puffer.fish             !! / !$ / ./ expansion (bundled from nickeb96/puffer-fish)
+      tmux-logging.fish       C5 starts tmux pipe-pane capture when fish runs inside tmux
+      zellij-logging.fish     C5 fish_exit handler dumping zellij pane scrollback on exit
       sponge_privacy.fish     Sponge privacy patterns; filters credentials from history
       starship.fish           fish_prompt with OSC 133 shell-integration markers
       tailscale.fish          Tailscale CLI tab completions
@@ -1552,6 +1569,10 @@ Examples:
     set -U __fish_config_op_greeting 1
     # (erase both to go back to full-flavor defaults)
 
+For an interactive alternative to setting these variables by hand, run
+config-toggle — a full-screen TUI that flips any category (including C5
+logging) on or off, per session or universally. See its entry in Section 5.
+
 Notes:
 
   - Command shadows (rm, cat, ls, ...) react immediately; conf.d-level