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+# config-toggle Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** Build `config-toggle`, an interactive TUI that lets users cycle six opinionated-category variables and the master variable between ON / OFF / DEFAULT with immediate apply, across Universal and Session scopes.
+
+**Architecture:** Three fish functions: the main `config-toggle` entry point handles argument parsing, terminal setup/teardown, and the event loop; `__config_toggle_draw` renders the 14-line panel in-place; `__config_toggle_get_val` reads a scope-specific variable value via `set --show` parsing. Changes apply immediately on each Space keypress via `set -U`/`set -g`/erase.
+
+**Tech Stack:** Fish 4.x builtins only (`read`, `set`, `string`, `printf`, `tput`). No external dependencies.
+
+**Spec:** `docs/specs/2026-06-11-config-toggle-design.md`
+
+---
+
+## File Map
+
+| Action | Path | Purpose |
+|--------|------|---------|
+| Create | `functions/config-toggle.fish` | Entry point: arg parse, terminal setup/teardown, event loop |
+| Create | `functions/__config_toggle_draw.fish` | Renders the 14-line TUI panel |
+| Create | `functions/__config_toggle_get_val.fish` | Reads a variable's value in a specific scope |
+| Modify | `docs/fish-config.md` | Add `config-toggle` entry after `config-update` (line ~1222) |
+| Modify | `docs/fish-config.index` | Add `toggle` and `config-toggle` keywords |
+
+---
+
+## Panel Layout Reference
+
+```
+┌─ Opinionated Settings ────────────────────────────┐   ← line 1
+│ ● Universal  ○ Session             Tab to switch  │   ← line 2
+│──────────────────────────────────────────────────│   ← line 3
+│  ▶ Aliases         [ ON      ]  cmd shadows       │   ← line 4
+│    Auto-exec       [ ON      ]  startup           │   ← line 5
+│    Overrides       [ DEFAULT ]  keys/env/prompt   │   ← line 6
+│    Integrations    [ ON      ]  terminal coupling │   ← line 7
+│    Logging         [ ON      ]  scrollback        │   ← line 8
+│    Greeting        [ DEFAULT ]  fish_greeting     │   ← line 9
+│    ──────────────────────────────────────────     │   ← line 10
+│    Master          [ DEFAULT ]  disable all       │   ← line 11
+│──────────────────────────────────────────────────│   ← line 12
+│  ↑↓/jk: move  Space: cycle  Tab: scope  q: quit  │   ← line 13
+└──────────────────────────────────────────────────┘   ← line 14
+```
+
+Outer width: 52 chars. Inner content: 50 chars. Panel = **14 lines**.
+
+Content row layout (50 chars visible between `│`):
+```
+  [cursor 2]  [label padded to 12]  [  badge 7  ]   [desc padded to 17]   
+= 2 + 2 + 12 + 3 + 7 + 4 + 17 + 3 = 50 chars
+```
+
+Badge values (7 chars, right-padded): `"ON     "` / `"OFF    "` / `"DEFAULT"`
+
+---
+
+## Variable Reference
+
+| Row idx | Label | Variable |
+|---------|-------|----------|
+| 0 | Aliases | `__fish_config_op_aliases` |
+| 1 | Auto-exec | `__fish_config_op_autoexec` |
+| 2 | Overrides | `__fish_config_op_overrides` |
+| 3 | Integrations | `__fish_config_op_integrations` |
+| 4 | Logging | `__fish_config_op_logging` |
+| 5 | Greeting | `__fish_config_op_greeting` |
+| 6 | Master | `__fish_config_opinionated` |
+
+State cycle on Space: `on → off → DEFAULT → on`
+
+Apply commands:
+
+| Result state | Universal scope | Session scope |
+|---|---|---|
+| on | `set -U <var> on` | `set -g <var> on` |
+| off | `set -U <var> off` | `set -g <var> off` |
+| DEFAULT | `set -Ue <var>` | `set -eg <var>` |
+
+---
+
+## Task 1: Scope-value reader helper
+
+**Files:**
+- Create: `functions/__config_toggle_get_val.fish`
+
+- [ ] **Step 1: Create the file**
+
+```fish
+# Copyright (C) 2026 Rootiest
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+# SYNOPSIS
+#   __config_toggle_get_val <varname> <scope>
+#
+# DESCRIPTION
+#   Returns the current value of a named variable in the specified scope by
+#   parsing `set --show` output. Outputs "on", "off", or "DEFAULT" (when
+#   the variable is not set in that scope). Scope "session" maps to "global"
+#   in fish's internal terminology.
+#
+# ARGUMENTS
+#   varname  Variable name without $ prefix
+#   scope    "universal" or "session"
+#
+# RETURNS
+#   0  Always; prints "on", "off", or "DEFAULT" to stdout
+#
+# EXAMPLE
+#   set result (__config_toggle_get_val __fish_config_op_aliases universal)
+#   # result == "on" | "off" | "DEFAULT"
+function __config_toggle_get_val
+    set -l varname $argv[1]
+    set -l scope $argv[2]
+
+    # fish uses "global" in set --show output for what we call "session"
+    set -l scope_kw $scope
+    if test $scope = session
+        set scope_kw global
+    end
+
+    set -l found 0
+    for line in (set --show $varname 2>/dev/null)
+        if string match -q "*$scope_kw scope*" $line
+            set found 1
+            continue
+        end
+        if test $found -eq 1
+            set found 0
+            # Format: $varname[1]: |value|
+            set -l val (string replace -r '^\$[^\[]+\[1\]: \|(.+)\|$' '$1' $line 2>/dev/null)
+            if test -n "$val" -a "$val" != $line
+                echo $val
+                return 0
+            end
+        end
+    end
+
+    echo DEFAULT
+    return 0
+end
+```
+
+- [ ] **Step 2: Verify it reads correctly**
+
+In a fish shell, run:
+```fish
+set -U __fish_config_op_aliases on
+set result (__config_toggle_get_val __fish_config_op_aliases universal)
+echo "universal: $result"   # expected: on
+set result (__config_toggle_get_val __fish_config_op_aliases session)
+echo "session:   $result"   # expected: DEFAULT  (no global set)
+set -g __fish_config_op_aliases off
+set result (__config_toggle_get_val __fish_config_op_aliases session)
+echo "session:   $result"   # expected: off
+# cleanup
+set -Ue __fish_config_op_aliases
+set -eg __fish_config_op_aliases
+```
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add functions/__config_toggle_get_val.fish
+git commit -m "feat(config-toggle): add scope-specific variable reader helper"
+```
+
+---
+
+## Task 2: Panel renderer
+
+**Files:**
+- Create: `functions/__config_toggle_draw.fish`
+
+- [ ] **Step 1: Create the file**
+
+```fish
+# Copyright (C) 2026 Rootiest
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+# SYNOPSIS
+#   __config_toggle_draw <cur_row> <cur_scope> <var1> ... <var7>
+#
+# DESCRIPTION
+#   Renders the 14-line config-toggle TUI panel to stdout. Intended to be
+#   called once on startup, then again after each keypress preceded by
+#   `printf '\e[14A\e[J'` (cursor-up 14 lines + clear-to-end) to redraw
+#   in place. Does not move the cursor — caller manages positioning.
+#
+# ARGUMENTS
+#   cur_row    0–6, the currently highlighted row
+#   cur_scope  "universal" or "session"
+#   var1–var7  Variable names for rows 0–6 (in order per Variable Reference)
+#
+# RETURNS
+#   0  Always
+#
+# EXAMPLE
+#   __config_toggle_draw 0 universal \
+#       __fish_config_op_aliases __fish_config_op_autoexec \
+#       __fish_config_op_overrides __fish_config_op_integrations \
+#       __fish_config_op_logging __fish_config_op_greeting \
+#       __fish_config_opinionated
+function __config_toggle_draw
+    set -l cur_row   $argv[1]
+    set -l cur_scope $argv[2]
+    set -l vars      $argv[3..]
+
+    set -l c_ok    (set_color green)
+    set -l c_err   (set_color red)
+    set -l c_dim   (set_color brblack)
+    set -l c_sel   (set_color --bold magenta)
+    set -l c_hi    (set_color --bold white)
+    set -l c_head  (set_color --bold cyan)
+    set -l c_reset (set_color normal)
+
+    set -l labels  Aliases Auto-exec Overrides Integrations Logging Greeting Master
+    set -l descs   "cmd shadows" startup "keys/env/prompt" "terminal coupling" scrollback fish_greeting "disable all"
+
+    # Panel dimensions
+    set -l IW 50   # inner width (chars between │ │)
+    set -l HBR (string repeat -n $IW '─')
+
+    # ── Scope tabs ────────────────────────────────────────
+    if test $cur_scope = universal
+        set -l u_label "$c_hi● Universal$c_reset"
+        set -l s_label "○ Session  "
+    else
+        set -l u_label "○ Universal"
+        set -l s_label "$c_hi● Session  $c_reset"
+    end
+
+    # ── Top border ────────────────────────────────────────
+    # "─ Opinionated Settings " = 23 chars; fill rest to IW-1 then ┐
+    printf '┌─%s Opinionated Settings %s┐\n' \
+        $c_head $c_reset(string repeat -n (math $IW - 24) '─')
+
+    # ── Scope tab line ────────────────────────────────────
+    # Content: " ● Universal  ○ Session             Tab to switch "  (50 vis chars)
+    printf '│ %s  %s%s│\n' \
+        $u_label $s_label \
+        (string repeat -n 12 ' ')"Tab to switch  "
+
+    # ── Top divider ───────────────────────────────────────
+    printf '│%s│\n' $HBR
+
+    # ── Category rows 0–5 ─────────────────────────────────
+    for i in (seq 0 5)
+        set -l idx    (math $i + 1)
+        set -l var    $vars[$idx]
+        set -l label  $labels[$idx]
+        set -l desc   $descs[$idx]
+
+        set -l val (__config_toggle_get_val $var $cur_scope)
+
+        # Badge: 7 visible chars, coloured
+        switch $val
+            case on
+                set -l badge "$c_ok""ON     $c_reset"
+            case off
+                set -l badge "$c_err""OFF    $c_reset"
+            case '*'
+                set -l badge "$c_dim""DEFAULT$c_reset"
+        end
+
+        # Cursor: 2 visible chars
+        if test $i -eq $cur_row
+            set -l curs "$c_sel▶$c_reset "
+        else
+            set -l curs "  "
+        end
+
+        # Label padded to 12, desc padded to 17, right margin 3
+        set -l lpad (string pad -r -w 12 -- $label)
+        set -l dpad (string pad -r -w 17 -- $desc)
+
+        printf '│  %s%s [ %s ]  %s   │\n' $curs $lpad $badge $dpad
+    end
+
+    # ── Separator before Master ───────────────────────────
+    printf '│    %s  │\n' (string repeat -n (math $IW - 6) '─')
+
+    # ── Master row (index 6) ──────────────────────────────
+    set -l val (__config_toggle_get_val $vars[7] $cur_scope)
+    switch $val
+        case on
+            set -l badge "$c_ok""ON     $c_reset"
+        case off
+            set -l badge "$c_err""OFF    $c_reset"
+        case '*'
+            set -l badge "$c_dim""DEFAULT$c_reset"
+    end
+    if test $cur_row -eq 6
+        set -l curs "$c_sel▶$c_reset "
+    else
+        set -l curs "  "
+    end
+    printf '│  %s%s [ %s ]  %s   │\n' \
+        $curs \
+        (string pad -r -w 12 -- Master) \
+        $badge \
+        (string pad -r -w 17 -- "disable all")
+
+    # ── Bottom divider ────────────────────────────────────
+    printf '│%s│\n' $HBR
+
+    # ── Keybind hint ──────────────────────────────────────
+    printf '│  %s↑↓/jk: move  Space: cycle  Tab: scope  q: quit%s  │\n' \
+        $c_dim $c_reset
+
+    # ── Bottom border ─────────────────────────────────────
+    printf '└%s┘\n' $HBR
+end
+```
+
+- [ ] **Step 2: Smoke-test the renderer**
+
+In a fish shell:
+```fish
+source functions/__config_toggle_draw.fish
+source functions/__config_toggle_get_val.fish
+__config_toggle_draw 0 universal \
+    __fish_config_op_aliases __fish_config_op_autoexec \
+    __fish_config_op_overrides __fish_config_op_integrations \
+    __fish_config_op_logging __fish_config_op_greeting \
+    __fish_config_opinionated
+```
+
+Expected: a 14-line bordered panel. Row 0 (Aliases) has `▶` in magenta. All badges show DEFAULT (dim) since no vars are set. Check that the panel is 52 chars wide.
+
+- [ ] **Step 3: Verify with a value set**
+
+```fish
+set -U __fish_config_op_aliases on
+__config_toggle_draw 0 universal \
+    __fish_config_op_aliases __fish_config_op_autoexec \
+    __fish_config_op_overrides __fish_config_op_integrations \
+    __fish_config_op_logging __fish_config_op_greeting \
+    __fish_config_opinionated
+set -Ue __fish_config_op_aliases
+```
+
+Expected: Aliases row badge shows green `ON     `. All others show `DEFAULT`.
+
+- [ ] **Step 4: Commit**
+
+```bash
+git add functions/__config_toggle_draw.fish
+git commit -m "feat(config-toggle): add panel renderer helper"
+```
+
+---
+
+## Task 3: Main function — skeleton, help flag, terminal setup
+
+**Files:**
+- Create: `functions/config-toggle.fish`
+
+- [ ] **Step 1: Create the skeleton with help flag**
+
+```fish
+# Copyright (C) 2026 Rootiest
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+# SYNOPSIS
+#   config-toggle [-h | --help]
+#
+# DESCRIPTION
+#   Opens an interactive full-screen TUI for toggling the six opinionated
+#   component categories (C1–C6) and the master disable variable without
+#   having to remember variable names. Two scope tabs allow independent
+#   per-scope configuration:
+#
+#     Universal — persists across all sessions (set -U / set -Ue)
+#     Session   — active for the current shell only (set -g / set -eg)
+#
+#   Changes apply immediately on each Space keypress — no confirm step.
+#   Always available regardless of __fish_config_opinionated state.
+#
+# ARGUMENTS
+#   -h, --help  Print usage and exit
+#
+# RETURNS
+#   0  Exited normally (q or Escape pressed)
+#   1  Unknown flag passed
+#
+# EXAMPLE
+#   config-toggle
+function config-toggle --description 'Interactive TUI for toggling opinionated component settings'
+    set -l c_head  (set_color --bold cyan)
+    set -l c_cmd   (set_color --bold white)
+    set -l c_flag  (set_color yellow)
+    set -l c_dim   (set_color brblack)
+    set -l c_err   (set_color red)
+    set -l c_reset (set_color normal)
+
+    # ── Argument parsing ──────────────────────────────────
+    for arg in $argv
+        switch $arg
+            case -h --help
+                echo "$c_head""Usage:$c_reset $c_cmd""config-toggle$c_reset $c_flag""[-h]$c_reset"
+                echo
+                echo "  Interactive TUI for toggling opinionated component categories."
+                echo "  Changes apply immediately — no confirm step required."
+                echo
+                echo "$c_head""Navigation:$c_reset"
+                echo "  $c_flag↑ ↓$c_reset or $c_flag""j k$c_reset    Move cursor up / down"
+                echo "  $c_flag""Space$c_reset         Cycle: ON → OFF → DEFAULT → ON"
+                echo "  $c_flag""Tab$c_reset           Switch scope (Universal ↔ Session)"
+                echo "  $c_flag""q$c_reset / $c_flag""Escape$c_reset    Exit"
+                echo
+                echo "$c_head""Scopes:$c_reset"
+                echo "  $c_flag""Universal$c_reset   Persistent across all sessions ($c_dim""set -U$c_reset)"
+                echo "  $c_flag""Session$c_reset     Current session only ($c_dim""set -g$c_reset)"
+                return 0
+            case '*'
+                echo "$c_err""Unknown option: $arg$c_reset" >&2
+                echo "Run $c_cmd""config-toggle --help$c_reset for usage." >&2
+                return 1
+        end
+    end
+end
+```
+
+- [ ] **Step 2: Verify help output**
+
+```fish
+config-toggle --help
+```
+
+Expected: coloured usage output, exits 0.
+
+```fish
+config-toggle --bogus
+echo $status   # expected: 1
+```
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add functions/config-toggle.fish
+git commit -m "feat(config-toggle): add function skeleton and help flag"
+```
+
+---
+
+## Task 4: Event loop — navigation and scope switching
+
+**Files:**
+- Modify: `functions/config-toggle.fish` (add after the arg-parse block, before the final `end`)
+
+- [ ] **Step 1: Add terminal setup, initial draw, and event loop**
+
+Replace the final `end` of `config-toggle` with this block:
+
+```fish
+    # ── Variable list (matches Panel Layout Reference) ────
+    set -l vars \
+        __fish_config_op_aliases \
+        __fish_config_op_autoexec \
+        __fish_config_op_overrides \
+        __fish_config_op_integrations \
+        __fish_config_op_logging \
+        __fish_config_op_greeting \
+        __fish_config_opinionated
+
+    set -l cur_row   0           # 0–6
+    set -l cur_scope universal   # or "session"
+    set -l panel_h   14          # total panel lines
+
+    # ── Terminal setup ────────────────────────────────────
+    printf '\e[?25l'             # hide cursor
+    trap 'printf "\e[?25h"; printf "\n"' INT
+
+    # ── Initial draw ──────────────────────────────────────
+    __config_toggle_draw $cur_row $cur_scope $vars
+
+    # ── Event loop ────────────────────────────────────────
+    while true
+        read -k 1 -l key
+
+        switch $key
+            case \e
+                # Arrow key: ESC [ A/B — read 2 more chars with short timeout
+                read -k 2 -l seq -t 0.1
+                switch $seq
+                    case '[A'   # Up arrow
+                        set cur_row (math "max(0, $cur_row - 1)")
+                    case '[B'   # Down arrow
+                        set cur_row (math "min(6, $cur_row + 1)")
+                end
+                # If seq is empty (bare Escape), fall through to quit
+                if test -z "$seq"
+                    break
+                end
+
+            case k
+                set cur_row (math "max(0, $cur_row - 1)")
+            case j
+                set cur_row (math "min(6, $cur_row + 1)")
+
+            case \t   # Tab — switch scope
+                if test $cur_scope = universal
+                    set cur_scope session
+                else
+                    set cur_scope universal
+                end
+
+            case q Q
+                break
+        end
+
+        # Redraw in place
+        printf '\e[%dA\e[J' $panel_h
+        __config_toggle_draw $cur_row $cur_scope $vars
+    end
+
+    # ── Cleanup ───────────────────────────────────────────
+    printf '\e[?25h'   # restore cursor
+end
+```
+
+- [ ] **Step 2: Verify navigation**
+
+```fish
+config-toggle
+```
+
+Expected:
+- Panel appears, cursor is hidden
+- ↑/↓ and j/k move the `▶` cursor between rows
+- Tab switches the scope tab highlight between `● Universal` and `● Session`
+- `q` or Escape exits cleanly and restores the cursor
+
+- [ ] **Step 3: Commit**
+
+```bash
+git add functions/config-toggle.fish
+git commit -m "feat(config-toggle): add event loop with navigation and scope switching"
+```
+
+---
+
+## Task 5: Cycling + immediate apply
+
+**Files:**
+- Modify: `functions/config-toggle.fish` (add Space handler inside the event loop)
+
+- [ ] **Step 1: Add the Space case to the switch block**
+
+Inside the `switch $key` block, add a `case ' '` handler. Insert it after the `case \t` block:
+
+```fish
+            case ' '
+                set -l varname $vars[(math $cur_row + 1)]
+                set -l cur_val (__config_toggle_get_val $varname $cur_scope)
+
+                # Cycle: on → off → DEFAULT → on
+                switch $cur_val
+                    case on
+                        set -l next_val off
+                    case off
+                        set -l next_val DEFAULT
+                    case '*'   # DEFAULT or any unrecognised
+                        set -l next_val on
+                end
+
+                # Apply immediately
+                switch $cur_scope
+                    case universal
+                        switch $next_val
+                            case on
+                                set -U $varname on
+                            case off
+                                set -U $varname off
+                            case DEFAULT
+                                set -Ue $varname
+                        end
+                    case session
+                        switch $next_val
+                            case on
+                                set -g $varname on
+                            case off
+                                set -g $varname off
+                            case DEFAULT
+                                set -eg $varname
+                        end
+                end
+```
+
+- [ ] **Step 2: Verify cycling and immediate apply**
+
+```fish
+config-toggle
+```
+
+Expected:
+- Navigate to **Aliases** (row 0), press Space → badge changes to green `ON     `, variable set immediately
+- Press Space again → badge changes to red `OFF    `
+- Press Space again → badge changes to dim `DEFAULT`
+- Press Space again → back to green `ON     `
+
+Verify the variable was actually set:
+```fish
+# In another terminal or after quitting:
+echo $__fish_config_op_aliases   # should reflect last state set
+```
+
+- [ ] **Step 3: Verify cross-scope independence**
+
+```fish
+config-toggle
+# Navigate to Integrations, Tab to Session, Space to ON
+# Tab back to Universal — badge should still show DEFAULT (separate scope)
+```
+
+Expected: Universal and Session values for the same row are independent.
+
+- [ ] **Step 4: Commit**
+
+```bash
+git add functions/config-toggle.fish
+git commit -m "feat(config-toggle): add Space cycling with immediate apply"
+```
+
+---
+
+## Task 6: Docs update
+
+**Files:**
+- Modify: `docs/fish-config.md`
+- Modify: `docs/fish-config.index`
+
+- [ ] **Step 1: Add entry to fish-config.md**
+
+In `docs/fish-config.md`, find the `### config-update` section (line ~1203). Insert the following block **immediately after** the `config-update` section ends (after the last example line `config-update --force`, before `### bash`):
+
+```markdown
+### config-toggle
+
+    Synopsis:  config-toggle [-h]
+
+    Opens an interactive full-screen TUI for toggling the six opinionated
+    component categories (C1–C6) and the master disable variable without
+    having to type or remember variable names. Two scope tabs allow
+    independent per-scope configuration:
+
+      Universal — persists across all sessions (set -U)
+      Session   — current shell only (set -g)
+
+    Changes apply immediately on each Space keypress. Always available
+    regardless of the __fish_config_opinionated master state.
+
+    Navigation:
+      ↑ ↓ / j k   Move cursor
+      Space        Cycle: ON → OFF → DEFAULT → ON
+      Tab          Switch scope (Universal ↔ Session)
+      q / Escape   Exit
+
+    Flags:
+      --help / -h   Show usage.
+
+    config-toggle
+
+```
+
+- [ ] **Step 2: Add entries to fish-config.index**
+
+In `docs/fish-config.index`, find the section that contains `config-help` and `config-update` keyword entries. Add after the last `config-update` line:
+
+```
+config-toggle=### config-toggle
+toggle=### config-toggle
+```
+
+- [ ] **Step 3: Verify docs are reachable**
+
+```fish
+config-help toggle
+```
+
+Expected: docs pager opens at the `config-toggle` section.
+
+- [ ] **Step 4: Commit**
+
+```bash
+git add docs/fish-config.md docs/fish-config.index
+git commit -m "docs(config-toggle): add config-toggle entry to offline docs and index"
+```
+
+---
+
+## Self-Review
+
+**Spec coverage check:**
+
+| Spec requirement | Covered by |
+|---|---|
+| Interactive TUI, colorful | Task 2 (renderer with set_color) |
+| ON / OFF / DEFAULT states | Tasks 2 + 5 (badge display + cycle logic) |
+| Universal / Session scope tabs | Tasks 3 + 4 (tab line + Tab key handler) |
+| Immediate apply on toggle | Task 5 (set -U/g/erase in Space handler) |
+| Tab key switches scope | Task 4 |
+| Always available (no guard) | Task 3 (function has no op_enabled wrapper) |
+| -h/--help per Convention §12 | Task 3 |
+| License header + docblock | Tasks 1, 2, 3 |
+| Color palette (Convention §11) | Tasks 2, 3 |
+| Docs update (Convention §10) | Task 6 |
+| docs/fish-config.index update | Task 6 |
+
+**Placeholder scan:** No TBDs, TODOs, or "handle edge cases" vagueness found. All code blocks are complete.
+
+**Type consistency:** `__config_toggle_get_val` returns "on", "off", or "DEFAULT" — the Space handler's `switch $cur_val` matches against those exact strings. The `$vars` array indices are 1-based in fish (used as `$vars[(math $cur_row + 1)]`) consistently throughout.