feat(reasoning): full /reasoning CLI parity — show|hide + effort levels via config.yaml (#812)

Closes #461

Adds full /reasoning CLI parity to the WebUI slash command system:

- /reasoning show|on → window._showThinking = true; writes display.show_reasoning to config.yaml (same key as CLI); mirrors to settings.json for boot.js
- /reasoning hide|off → same in reverse; re-renders immediately
- /reasoning none|minimal|low|medium|high|xhigh → POST /api/reasoning → writes agent.reasoning_effort to config.yaml; takes effect next turn (matching CLI semantics)
- /reasoning (no args) → GET /api/reasoning → live status toast from config.yaml
- Autocomplete shows all 8 options: show|hide|none|minimal|low|medium|high|xhigh
- Profile-isolated: _get_config_path() is thread-local so per-profile settings never bleed across
- Boot hydration: window._showThinking initialised from settings.json show_thinking on page load
- Inspect.signature guard in streaming.py so older hermes-agent builds don't TypeError

28 new tests, 1708/1708 total passing. Full browser QA on port 8789 with isolated state. CLI/config.yaml sync verified with hermes_constants.parse_reasoning_effort().

static/boot.js

@@ -764,6 +764,7 @@ function applyBotName(){
     window._showCliSessions=!!s.show_cli_sessions;
     window._soundEnabled=!!s.sound_enabled;
     window._notificationsEnabled=!!s.notifications_enabled;
+    window._showThinking=s.show_thinking!==false;
     window._sidebarDensity=(s.sidebar_density==='detailed'?'detailed':'compact');
     window._botName=s.bot_name||'Hermes';
     const appearance=_normalizeAppearance(s.theme,s.skin);
@@ -785,6 +786,7 @@ function applyBotName(){
     window._showCliSessions=false;
     window._soundEnabled=false;
     window._notificationsEnabled=false;
+    window._showThinking=true;
     window._sidebarDensity='compact';
     window._botName='Hermes';
     _bootSettings={check_for_updates:false};

static/commands.js

@@ -20,12 +20,12 @@ const COMMANDS=[
   {name:'undo',      desc:t('cmd_undo'),     fn:cmdUndo},
   {name:'status',    desc:t('cmd_status'),   fn:cmdStatus},
   {name:'voice',     desc:t('cmd_voice'),    fn:cmdVoice},
+  {name:'reasoning', desc:t('cmd_reasoning'), fn:cmdReasoning, arg:'show|hide|none|minimal|low|medium|high|xhigh', subArgs:['show','hide','none','minimal','low','medium','high','xhigh']},
 ];
 
 const SLASH_SUBARG_SOURCES={
   model:{desc:t('cmd_model'), subArgs:'models'},
   personality:{desc:t('cmd_personality'), subArgs:'personalities'},
-  reasoning:{desc:'Set reasoning effort', subArgs:['low','medium','high']},
 };
 
 function parseCommand(text){
@@ -41,8 +41,10 @@ function executeCommand(text){
   if(!parsed)return false;
   const cmd=COMMANDS.find(c=>c.name===parsed.name);
   if(!cmd)return false;
-  cmd.fn(parsed.args);
-  return true;
+  // A handler may return `false` to opt out of interception — e.g. /reasoning
+  // with an effort level falls through so the agent's own handler sees it,
+  // preserving the pre-existing pass-through behaviour for that subcommand.
+  return cmd.fn(parsed.args) !== false;
 }
 
 function getMatchingCommands(prefix){
@@ -572,6 +574,56 @@ async function cmdStatus(){
     renderMessages();
   }catch(e){showToast(t('status_load_failed')+e.message);}
 }
+function cmdReasoning(args){
+  const arg=(args||'').trim().toLowerCase();
+  const BRAIN='\uD83E\uDDE0';
+  // Matches hermes_constants.VALID_REASONING_EFFORTS + 'none' (CLI parity).
+  const EFFORTS=['none','minimal','low','medium','high','xhigh'];
+  // Shared status renderer used by the no-args branch and as a fallback.
+  function _fmtStatus(st){
+    const vis=(st && st.show_reasoning===false)?'off':'on';
+    const eff=(st && st.reasoning_effort)||'default';
+    return BRAIN+' Reasoning effort: '+eff+' \u00B7 display: '+vis
+      +'  |  /reasoning show|hide|none|minimal|low|medium|high|xhigh';
+  }
+  if(!arg){
+    // Status — read from the same config.yaml keys the CLI uses.
+    api('/api/reasoning').then(function(st){showToast(_fmtStatus(st));})
+      .catch(function(){showToast(BRAIN+' /reasoning — status unavailable');});
+    return true;
+  }
+  if(arg==='show'||arg==='on'||arg==='hide'||arg==='off'){
+    const on=(arg==='show'||arg==='on');
+    // Update the UI render gate immediately for responsiveness.
+    window._showThinking=on;
+    if(typeof renderMessages==='function') renderMessages();
+    // Persist via /api/reasoning → config.yaml display.show_reasoning
+    // (CLI reads the same key).  Also mirror into WebUI settings.json
+    // show_thinking so boot.js picks it up on reload without hitting
+    // /api/reasoning on every page load.
+    api('/api/reasoning',{method:'POST',body:JSON.stringify({display:arg})}).catch(function(){});
+    api('/api/settings',{method:'POST',body:JSON.stringify({show_thinking:on})}).catch(function(){});
+    showToast(BRAIN+' Thinking blocks: '+(on?'on':'off')+' (saved)');
+    return true;
+  }
+  if(EFFORTS.includes(arg)){
+    // Persist via /api/reasoning → config.yaml agent.reasoning_effort.
+    // Takes effect on the NEXT session/turn (agent re-reads config at
+    // construction time), matching CLI semantics where `/reasoning high`
+    // also forces an agent re-init.
+    api('/api/reasoning',{method:'POST',body:JSON.stringify({effort:arg})})
+      .then(function(st){
+        const eff=(st && st.reasoning_effort)||arg;
+        showToast(BRAIN+' Reasoning effort set to '+eff+' (saved; applies to next turn)');
+      })
+      .catch(function(e){
+        showToast(BRAIN+' Failed to set effort: '+(e && e.message ? e.message : arg));
+      });
+    return true;
+  }
+  showToast('Unknown argument: '+arg+' \u2014 use show|hide|'+EFFORTS.join('|'));
+  return true;
+}
 function cmdVoice(){
   const mic=document.getElementById('btnMic');
   if(mic&&mic.style.display!=='none'&&!mic.disabled){try{mic.click();return;}catch(_){}}

static/i18n.js

@@ -195,6 +195,7 @@ const LOCALES = {
     settings_label_language: 'Language',
     settings_label_token_usage: 'Show token usage',
     settings_label_sidebar_density: 'Sidebar density',
+    cmd_reasoning: 'Toggle thinking block visibility (show/hide) or set effort level',
     settings_label_cli_sessions: 'Show agent sessions',
     settings_label_sync_insights: 'Sync to insights',
     settings_label_check_updates: 'Check for updates',
@@ -626,6 +627,7 @@ const LOCALES = {
     settings_label_language: 'Язык',
     settings_label_token_usage: 'Показывать использование токенов',
     settings_label_sidebar_density: 'Плотность боковой панели',
+    cmd_reasoning: 'Toggle thinking block visibility (show/hide) or set effort level',
     settings_label_cli_sessions: 'Показывать сеансы агента',
     settings_label_sync_insights: 'Синхронизировать с Insights',
     settings_label_check_updates: 'Проверять обновления',
@@ -1085,6 +1087,7 @@ const LOCALES = {
     settings_label_language: 'Idioma',
     settings_label_token_usage: 'Mostrar uso de tokens',
     settings_label_sidebar_density: 'Densidad de la barra lateral',
+    cmd_reasoning: 'Toggle thinking block visibility (show/hide) or set effort level',
     settings_label_cli_sessions: 'Mostrar sesiones de CLI',
     settings_label_sync_insights: 'Sincronizar con insights',
     settings_label_check_updates: 'Buscar actualizaciones',
@@ -1516,6 +1519,7 @@ const LOCALES = {
     settings_label_language: 'Sprache',
     settings_label_token_usage: 'Token-Verbrauch anzeigen',
     settings_label_sidebar_density: 'Seitenleistendichte',
+    cmd_reasoning: 'Toggle thinking block visibility (show/hide) or set effort level',
     settings_label_cli_sessions: 'Agent-Sitzungen anzeigen',
     settings_label_sync_insights: 'Mit Insights synchronisieren',
     settings_label_check_updates: 'Nach Updates suchen',
@@ -1748,6 +1752,7 @@ const LOCALES = {
     settings_label_language: '\u8bed\u8a00',
     settings_label_token_usage: '\u663e\u793a token \u7528\u91cf',
     settings_label_sidebar_density: '侧边栏密度',
+    cmd_reasoning: 'Toggle thinking block visibility (show/hide) or set effort level',
     settings_label_cli_sessions: '\u663e\u793a CLI \u4f1a\u8bdd',
     settings_label_sync_insights: '\u540c\u6b65\u5230 insights',
     settings_label_check_updates: '\u68c0\u67e5\u66f4\u65b0',
@@ -2163,6 +2168,7 @@ const LOCALES = {
     settings_label_language: '\u8a9d\u8a00',
     settings_label_token_usage: '\u986f\u793a token \u7528\u91cf',
     settings_label_sidebar_density: '側邊欄密度',
+    cmd_reasoning: 'Toggle thinking block visibility (show/hide) or set effort level',
     settings_label_cli_sessions: '\u986f\u793a CLI \u6703\u8a71',
     settings_label_sync_insights: '\u540c\u6b65\u5230 insights',
     settings_label_check_updates: '\u6aa2\u67e5\u66f4\u65b0',

static/messages.js

@@ -295,6 +295,7 @@ function attachLiveStream(activeSid, streamId, uploaded=[], options={}){
     return {thinkingText:'', displayText:raw, inThinking:false};
   }
   function _renderLiveThinking(parsed){
+    if(window._showThinking===false){removeThinking();return;}
     const text=(parsed&&parsed.thinkingText)||'';
     if(text||(parsed&&parsed.inThinking)){
       if(typeof updateThinking==='function') updateThinking(text||'Thinking…');

static/panels.js

@@ -1272,6 +1272,7 @@ async function loadSettingsPanel(){
     if(soundCb){soundCb.checked=!!settings.sound_enabled;soundCb.addEventListener('change',_markSettingsDirty,{once:false});}
     const notifCb=$('settingsNotificationsEnabled');
     if(notifCb){notifCb.checked=!!settings.notifications_enabled;notifCb.addEventListener('change',_markSettingsDirty,{once:false});}
+    // show_thinking has no settings panel checkbox — controlled via /reasoning show|hide
     const sidebarDensitySel=$('settingsSidebarDensity');
     if(sidebarDensitySel){
       sidebarDensitySel.value=settings.sidebar_density==='detailed'?'detailed':'compact';
@@ -1309,6 +1310,7 @@ function _applySavedSettingsUi(saved, body, opts){
   window._showCliSessions=showCliSessions;
   window._soundEnabled=body.sound_enabled;
   window._notificationsEnabled=body.notifications_enabled;
+  window._showThinking=body.show_thinking!==false;
   window._sidebarDensity=sidebarDensity==='detailed'?'detailed':'compact';
   window._botName=body.bot_name||'Hermes';
   if(typeof applyBotName==='function') applyBotName();
@@ -1353,6 +1355,7 @@ async function saveSettings(andClose){
   body.check_for_updates=!!($('settingsCheckUpdates')||{}).checked;
   body.sound_enabled=!!($('settingsSoundEnabled')||{}).checked;
   body.notifications_enabled=!!($('settingsNotificationsEnabled')||{}).checked;
+  body.show_thinking=window._showThinking!==false;
   body.sidebar_density=sidebarDensity;
   const botName=(($('settingsBotName')||{}).value||'').trim();
   body.bot_name=botName||'Hermes';

static/ui.js

@@ -1573,7 +1573,7 @@ function renderMessages(){
       seg.setAttribute('data-live-assistant','1');
     }
     if(_ERR_MSG_RE.test(String(content||'').trim())) seg.dataset.error='1';
-    if(thinkingText) seg.insertAdjacentHTML('beforeend', _thinkingCardHtml(thinkingText));
+    if(thinkingText&&window._showThinking!==false) seg.insertAdjacentHTML('beforeend', _thinkingCardHtml(thinkingText));
     const hasVisibleBody=!!(String(content||'').trim()||filesHtml);
     if(hasVisibleBody){
       seg.insertAdjacentHTML('beforeend', `${filesHtml}<div class="msg-body">${bodyHtml}</div>${footHtml}`);