diff --git a/PARITY_CHECKLIST.md b/PARITY_CHECKLIST.md
index a84b0f8..1288953 100644
--- a/PARITY_CHECKLIST.md
+++ b/PARITY_CHECKLIST.md
@@ -324,7 +324,7 @@ Missing npm slash commands (from `src/commands/` — 80+ commands total):
 - [x] `/agents` — Inspect, create, update, and delete local agent definitions
 - [x] `/branch` — Create a branch of the current conversation
 - [ ] `/bridge` — Connect for remote-control sessions
-- [ ] `/btw` — Quick side question without interrupting main conversation
+- [x] `/btw` — Quick side question without interrupting main conversation
 - [x] `/chrome` — Chrome extension settings
 - [x] `/color` — Set the prompt bar color for this session
 - [x] `/compact` — Clear history but keep a summary in context
@@ -343,7 +343,7 @@ Missing npm slash commands (from `src/commands/` — 80+ commands total):
 - [ ] `/ide` — Manage IDE integrations and show status
 - [x] `/install-github-app` — Set up GitHub Actions
 - [x] `/install-slack-app` — Install Slack app
-- [ ] `/keybindings` — Open keybindings config file
+- [x] `/keybindings` — Open keybindings config file
 - [x] `/mobile` — Mobile app store links (aliases `/ios`, `/android`)
 - [x] `/output-style` — Deprecation pointer to `/config`
 - [x] `/passes` — Passes management
@@ -358,15 +358,15 @@ Missing npm slash commands (from `src/commands/` — 80+ commands total):
 - [x] `/rename` — Rename current conversation
 - [x] `/resume`, `/continue` — Resume a previous conversation
 - [x] `/rewind`, `/checkpoint` — Restore code/conversation to a previous point
-- [ ] `/sandbox-toggle` — Toggle sandbox mode
+- [x] `/sandbox-toggle` — Toggle sandbox mode (alias `/sandbox`)
 - [x] `/skills` — List available skills
 - [x] `/stats` — Usage statistics and activity
 - [x] `/stickers` — Order stickers
 - [x] `/tag` — Toggle a searchable tag on the session
-- [ ] `/theme` — Change the theme
+- [x] `/theme` — Change the theme
 - [x] `/upgrade` — Upgrade to Max
 - [x] `/vim` — Toggle Vim/Normal editing modes
-- [ ] `/voice` — Toggle voice mode
+- [x] `/voice` — Toggle voice mode
 - [ ] Feature-gated: `/buddy`, `/fork`, `/peers`, `/proactive`, `/torch`, `/workflows` (full), etc.
 - [ ] Internal: `/backfill-sessions`, `/break-cache`, `/bughunter`, `/commit-push-pr`, `/init-verifiers`, `/mock-limits`, `/version`, `/ultraplan`, `/autofix-pr`, etc.
 - [x] `/commit` — Create a git commit (prompt-type with injected git context)
diff --git a/src/agent_slash_commands.py b/src/agent_slash_commands.py
index 156fea8..135c235 100644
--- a/src/agent_slash_commands.py
+++ b/src/agent_slash_commands.py
@@ -489,6 +489,31 @@ def get_slash_command_specs() -> tuple[SlashCommandSpec, ...]:
             description='Reload local plugin manifests and report counts.',
             handler=_handle_reload_plugins,
         ),
+        SlashCommandSpec(
+            names=('theme',),
+            description='List available themes or set the current theme.',
+            handler=_handle_theme,
+        ),
+        SlashCommandSpec(
+            names=('voice',),
+            description='Toggle voice-mode setting for this workspace.',
+            handler=_handle_voice,
+        ),
+        SlashCommandSpec(
+            names=('sandbox-toggle', 'sandbox'),
+            description='Show sandbox status or exclude a command pattern.',
+            handler=_handle_sandbox_toggle,
+        ),
+        SlashCommandSpec(
+            names=('keybindings',),
+            description='Print or create the local keybindings file.',
+            handler=_handle_keybindings,
+        ),
+        SlashCommandSpec(
+            names=('btw',),
+            description='Ask Claude a quick side question without altering state.',
+            handler=_handle_btw,
+        ),
     )
 
 
@@ -1976,6 +2001,194 @@ def _handle_reload_plugins(
     )
 
 
+_AVAILABLE_THEMES = (
+    'light',
+    'dark',
+    'light-daltonized',
+    'dark-daltonized',
+    'light-ansi',
+    'dark-ansi',
+)
+
+
+def _config_get(runtime, key_path: str, default=None):
+    try:
+        return runtime.get_value(key_path)
+    except KeyError:
+        return default
+
+
+def _handle_theme(
+    agent: 'LocalCodingAgent',
+    args: str,
+    input_text: str,
+) -> SlashCommandResult:
+    runtime = agent.config_runtime
+    if runtime is None:
+        return _local_result(input_text, 'Config runtime is unavailable.')
+    requested = args.strip()
+    current = _config_get(runtime, 'theme') or 'light'
+    if not requested:
+        lines = ['Available themes:']
+        for name in _AVAILABLE_THEMES:
+            marker = ' (current)' if name == current else ''
+            lines.append(f'  - {name}{marker}')
+        lines.append('')
+        lines.append('Usage: /theme <name>')
+        return _local_result(input_text, '\n'.join(lines))
+    if requested not in _AVAILABLE_THEMES:
+        return _local_result(
+            input_text,
+            f'Unknown theme "{requested}". Available: {", ".join(_AVAILABLE_THEMES)}.',
+        )
+    mutation = runtime.set_value('theme', requested, source='local')
+    return _local_result(
+        input_text,
+        f'Theme set to {requested} (saved to {mutation.store_path}).',
+    )
+
+
+def _handle_voice(
+    agent: 'LocalCodingAgent',
+    args: str,
+    input_text: str,
+) -> SlashCommandResult:
+    runtime = agent.config_runtime
+    if runtime is None:
+        return _local_result(input_text, 'Config runtime is unavailable.')
+    arg = args.strip().lower()
+    current = bool(_config_get(runtime, 'voiceEnabled', False))
+    if arg in {'on', 'enable', 'true'}:
+        new_value = True
+    elif arg in {'off', 'disable', 'false'}:
+        new_value = False
+    elif not arg:
+        new_value = not current
+    else:
+        return _local_result(input_text, 'Usage: /voice [on|off]')
+    mutation = runtime.set_value('voiceEnabled', new_value, source='local')
+    state = 'enabled' if new_value else 'disabled'
+    extra = ''
+    if new_value:
+        import platform
+
+        if platform.system() == 'Linux':
+            extra = (
+                '\nLinux note: confirm microphone access in your audio settings '
+                'before holding to talk.'
+            )
+    return _local_result(
+        input_text,
+        f'Voice mode {state} (saved to {mutation.store_path}).{extra}',
+    )
+
+
+def _handle_sandbox_toggle(
+    agent: 'LocalCodingAgent',
+    args: str,
+    input_text: str,
+) -> SlashCommandResult:
+    runtime = agent.config_runtime
+    if runtime is None:
+        return _local_result(input_text, 'Config runtime is unavailable.')
+    trimmed = args.strip()
+    if not trimmed:
+        enabled = bool(_config_get(runtime, 'sandbox.enabled', False))
+        excluded = _config_get(runtime, 'sandbox.excludedCommands') or []
+        lines = [
+            f'Sandbox: {"enabled" if enabled else "disabled"}',
+            f'Excluded commands ({len(excluded)}):',
+        ]
+        for pattern in excluded:
+            lines.append(f'  - {pattern}')
+        lines.append('')
+        lines.append(
+            'Usage: /sandbox-toggle exclude "<pattern>"  '
+            '— append a command pattern to the local sandbox excludes.'
+        )
+        return _local_result(input_text, '\n'.join(lines))
+
+    parts = trimmed.split(None, 1)
+    subcommand = parts[0].lower()
+    if subcommand != 'exclude':
+        return _local_result(
+            input_text,
+            f'Unknown subcommand "{subcommand}". Available: exclude.',
+        )
+    if len(parts) < 2 or not parts[1].strip():
+        return _local_result(
+            input_text,
+            'Usage: /sandbox-toggle exclude "<pattern>" '
+            '(e.g., /sandbox-toggle exclude "npm run test:*").',
+        )
+    pattern = parts[1].strip().strip('"').strip("'")
+    existing = list(_config_get(runtime, 'sandbox.excludedCommands') or [])
+    if pattern in existing:
+        return _local_result(
+            input_text,
+            f'Pattern "{pattern}" is already in sandbox.excludedCommands.',
+        )
+    existing.append(pattern)
+    mutation = runtime.set_value(
+        'sandbox.excludedCommands', existing, source='local',
+    )
+    return _local_result(
+        input_text,
+        f'Added "{pattern}" to sandbox.excludedCommands in {mutation.store_path}.',
+    )
+
+
+_KEYBINDINGS_TEMPLATE = (
+    '{\n'
+    '  "$schema": "https://claude.ai/schemas/keybindings.json",\n'
+    '  "bindings": {\n'
+    '    // "chat:submit": "ctrl+enter"\n'
+    '  }\n'
+    '}\n'
+)
+
+
+def _handle_keybindings(
+    agent: 'LocalCodingAgent',
+    _args: str,
+    input_text: str,
+) -> SlashCommandResult:
+    from pathlib import Path
+
+    cwd = Path(agent.runtime_config.cwd)
+    path = cwd / '.claude' / 'keybindings.json'
+    created = False
+    if not path.exists():
+        path.parent.mkdir(parents=True, exist_ok=True)
+        path.write_text(_KEYBINDINGS_TEMPLATE, encoding='utf-8')
+        created = True
+    verb = 'Created' if created else 'Found'
+    import os
+
+    editor = os.environ.get('EDITOR') or os.environ.get('VISUAL') or '<your editor>'
+    return _local_result(
+        input_text,
+        f'{verb} {path}.\n'
+        f'Edit it with: {editor} {path}',
+    )
+
+
+def _handle_btw(
+    agent: 'LocalCodingAgent',
+    args: str,
+    input_text: str,
+) -> SlashCommandResult:
+    question = args.strip()
+    if not question:
+        return _local_result(input_text, 'Usage: /btw <your question>')
+    prompt = (
+        'Answer the following side question concisely. Do NOT modify any files, '
+        "run shell commands, or alter the workspace — just answer in text.\n\n"
+        f'Side question: {question}'
+    )
+    return _prompt_result(input_text, prompt)
+
+
 def _prompt_result(input_text: str, prompt: str) -> SlashCommandResult:
     """Return a prompt-type result — the prompt gets sent to the model."""
     return SlashCommandResult(
diff --git a/tests/test_settings_slash_commands.py b/tests/test_settings_slash_commands.py
new file mode 100644
index 0000000..2674bf0
--- /dev/null
+++ b/tests/test_settings_slash_commands.py
@@ -0,0 +1,179 @@
+"""Tests for settings-touching slash commands ported from the npm source.
+
+Covers /theme, /voice, /sandbox-toggle (alias /sandbox), /keybindings, /btw.
+"""
+
+from __future__ import annotations
+
+import json
+import tempfile
+import unittest
+from pathlib import Path
+
+from src.agent_runtime import LocalCodingAgent
+from src.agent_types import AgentRuntimeConfig, ModelConfig
+
+
+def _make_agent(tmp_dir: str) -> LocalCodingAgent:
+    return LocalCodingAgent(
+        model_config=ModelConfig(model='test-model'),
+        runtime_config=AgentRuntimeConfig(cwd=Path(tmp_dir)),
+    )
+
+
+def _local_settings(tmp_dir: str) -> dict:
+    path = Path(tmp_dir) / '.claude' / 'settings.local.json'
+    if not path.exists():
+        return {}
+    return json.loads(path.read_text(encoding='utf-8'))
+
+
+class ThemeCommandTest(unittest.TestCase):
+    def test_lists_themes_when_no_arg(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            agent = _make_agent(tmp)
+            out = agent.run('/theme').final_output
+        self.assertIn('Available themes', out)
+        self.assertIn('light', out)
+        self.assertIn('dark', out)
+        self.assertIn('Usage: /theme <name>', out)
+
+    def test_rejects_unknown_theme(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            agent = _make_agent(tmp)
+            out = agent.run('/theme neon').final_output
+        self.assertIn('Unknown theme', out)
+        self.assertIn('neon', out)
+
+    def test_sets_theme_and_persists(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            agent = _make_agent(tmp)
+            out = agent.run('/theme dark').final_output
+            self.assertIn('Theme set to dark', out)
+            settings = _local_settings(tmp)
+        self.assertEqual(settings.get('theme'), 'dark')
+
+    def test_marks_current_theme(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            agent = _make_agent(tmp)
+            agent.run('/theme dark')
+            out = agent.run('/theme').final_output
+        self.assertIn('dark (current)', out)
+
+
+class VoiceCommandTest(unittest.TestCase):
+    def test_toggle_enables_when_unset(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            agent = _make_agent(tmp)
+            out = agent.run('/voice').final_output
+            self.assertIn('Voice mode enabled', out)
+            self.assertEqual(_local_settings(tmp).get('voiceEnabled'), True)
+
+    def test_toggle_disables_when_enabled(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            agent = _make_agent(tmp)
+            agent.run('/voice on')
+            out = agent.run('/voice').final_output
+            self.assertIn('Voice mode disabled', out)
+            self.assertEqual(_local_settings(tmp).get('voiceEnabled'), False)
+
+    def test_explicit_on_off(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            agent = _make_agent(tmp)
+            self.assertIn('enabled', agent.run('/voice on').final_output)
+            self.assertIn('disabled', agent.run('/voice off').final_output)
+
+    def test_rejects_unknown_arg(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            agent = _make_agent(tmp)
+            out = agent.run('/voice maybe').final_output
+        self.assertIn('Usage', out)
+
+
+class SandboxToggleCommandTest(unittest.TestCase):
+    def test_status_with_no_args(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            agent = _make_agent(tmp)
+            out = agent.run('/sandbox-toggle').final_output
+        self.assertIn('Sandbox:', out)
+        self.assertIn('Excluded commands', out)
+        self.assertIn('Usage:', out)
+
+    def test_alias_sandbox(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            agent = _make_agent(tmp)
+            out = agent.run('/sandbox').final_output
+        self.assertIn('Sandbox:', out)
+
+    def test_exclude_appends_pattern(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            agent = _make_agent(tmp)
+            out = agent.run('/sandbox-toggle exclude "npm run test:*"').final_output
+            self.assertIn('Added "npm run test:*"', out)
+            settings = _local_settings(tmp)
+        excluded = settings.get('sandbox', {}).get('excludedCommands', [])
+        self.assertIn('npm run test:*', excluded)
+
+    def test_exclude_dedupes(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            agent = _make_agent(tmp)
+            agent.run('/sandbox-toggle exclude "rm -rf /"')
+            out = agent.run('/sandbox-toggle exclude "rm -rf /"').final_output
+        self.assertIn('already in', out)
+
+    def test_exclude_requires_pattern(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            agent = _make_agent(tmp)
+            out = agent.run('/sandbox-toggle exclude').final_output
+        self.assertIn('Usage', out)
+
+    def test_unknown_subcommand(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            agent = _make_agent(tmp)
+            out = agent.run('/sandbox-toggle wat').final_output
+        self.assertIn('Unknown subcommand', out)
+
+
+class KeybindingsCommandTest(unittest.TestCase):
+    def test_creates_template_when_missing(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            agent = _make_agent(tmp)
+            out = agent.run('/keybindings').final_output
+            path = Path(tmp) / '.claude' / 'keybindings.json'
+            self.assertTrue(path.exists())
+            self.assertIn('Created', out)
+            self.assertIn(str(path), out)
+            # Template is valid JSON-ish (has braces); strict json.loads would
+            # choke on the "//" comment, so just sanity-check structure.
+            text = path.read_text(encoding='utf-8')
+            self.assertIn('"bindings"', text)
+
+    def test_reports_existing_file(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            agent = _make_agent(tmp)
+            agent.run('/keybindings')
+            out = agent.run('/keybindings').final_output
+        self.assertIn('Found', out)
+
+
+class BtwCommandTest(unittest.TestCase):
+    def test_no_question_shows_usage(self) -> None:
+        with tempfile.TemporaryDirectory() as tmp:
+            agent = _make_agent(tmp)
+            result = agent.run('/btw').final_output
+        self.assertIn('Usage: /btw', result)
+
+    def test_question_returns_prompt_result(self) -> None:
+        from src.agent_slash_commands import preprocess_slash_command
+
+        with tempfile.TemporaryDirectory() as tmp:
+            agent = _make_agent(tmp)
+            result = preprocess_slash_command(agent, '/btw what does this codebase do?')
+        self.assertTrue(result.handled)
+        self.assertTrue(result.should_query)
+        self.assertIn('side question', (result.prompt or '').lower())
+        self.assertIn('what does this codebase do?', result.prompt or '')
+
+
+if __name__ == '__main__':
+    unittest.main()