diff --git a/src/app.tsx b/src/app.tsx
index 9674e59..d85d47d 100644
--- a/src/app.tsx
+++ b/src/app.tsx
@@ -12,6 +12,7 @@ import {
   createSession,
   killSession,
   browse9p,
+  renameSession,
 } from './lib/api'
 import type { IdxEntry } from './lib/api'
 import { parseChat } from './lib/chat'
@@ -122,6 +123,13 @@ export function App() {
     setSessions(s)
   }, [selectedId])
 
+  const handleRename = useCallback(async (id: string, newName: string) => {
+    await renameSession(id, newName)
+    if (selectedId === id) setSelectedId(newName)
+    const s = await listSessions()
+    setSessions(s)
+  }, [selectedId])
+
   return (
     <div class="layout">
       <Sidebar
@@ -130,6 +138,7 @@ export function App() {
         onSelect={handleSelect}
         onNew={() => setShowNew(true)}
         onKill={handleKill}
+        onRename={handleRename}
         themes={getThemes()}
         currentTheme={themeName}
         onThemeChange={handleSetTheme}
@@ -144,6 +153,7 @@ export function App() {
         browseData={browseData}
         onBrowse={handleBrowse}
         onSelectSession={handleSelect}
+        onRename={handleRename}
       />
       {showNew && (
         <NewSession onClose={() => setShowNew(false)} onCreate={handleCreate} />
diff --git a/src/components/ChatPane.tsx b/src/components/ChatPane.tsx
index f73eb48..3a679d5 100644
--- a/src/components/ChatPane.tsx
+++ b/src/components/ChatPane.tsx
@@ -17,6 +17,7 @@ interface Props {
   browseData: any
   onBrowse: (path: string) => void
   onSelectSession: (id: string) => void
+  onRename: (id: string, newName: string) => void
 }
 
 function stateClass(state: string) {
@@ -25,7 +26,7 @@ function stateClass(state: string) {
   return 'running'
 }
 
-export function ChatPane({ session, cfg, messages, onSend, onStop, browsePath, browseData, onBrowse, onSelectSession }: Props) {
+export function ChatPane({ session, cfg, messages, onSend, onStop, browsePath, browseData, onBrowse, onSelectSession, onRename }: Props) {
   const listRef = useRef<HTMLDivElement>(null)
   const [atBottom, setAtBottom] = useState(true)
 
@@ -55,15 +56,35 @@ export function ChatPane({ session, cfg, messages, onSend, onStop, browsePath, b
     )
   }
 
-  const sid = shortId(session.id)
+  const sid = session.id
   const state = cfg.state ?? 'stopped'
+  const [renaming, setRenaming] = useState(false)
+  const [renameVal, setRenameVal] = useState('')
+
+  const startRename = () => { setRenaming(true); setRenameVal(sid) }
+  const commitRename = () => {
+    setRenaming(false)
+    const name = renameVal.trim()
+    if (name && name !== sid) onRename(sid, name)
+  }
 
   return (
     <main class="main">
       <header class="chat-header">
         <div class="chat-path">
           <span class="fs-path-link" onClick={() => onBrowse('/mnt/s/')}>↑</span>{' '}
-          /s/<span class="path-hi">{sid}</span>/chat
+          /s/{renaming ? (
+            <input
+              class="session-rename-input"
+              value={renameVal}
+              onInput={e => setRenameVal((e.target as HTMLInputElement).value)}
+              onBlur={() => commitRename()}
+              onKeyDown={e => { if (e.key === 'Enter') commitRename(); if (e.key === 'Escape') setRenaming(false) }}
+              autoFocus
+            />
+          ) : (
+            <span class="path-hi" onDblClick={startRename}>{sid}</span>
+          )}/chat
         </div>
         <div class="header-meta">
           <div class={`state-dot ${stateClass(state)}`} style="margin-right: 2px;" />
@@ -87,6 +108,8 @@ export function ChatPane({ session, cfg, messages, onSend, onStop, browsePath, b
                 <div class="user-text"><span class="msg-prefix">u: </span>{msg.content}</div>
               ) : msg.role === 'tool' ? (
                 <ToolCall content={msg.content} />
+              ) : msg.role === 'info' ? (
+                <div class="info-text">{msg.content}</div>
               ) : (
                 <div
                   class="md"
@@ -111,31 +134,37 @@ export function ChatPane({ session, cfg, messages, onSend, onStop, browsePath, b
   )
 }
 
-function formatToolContent(raw: string): { name: string; body: string } {
-  const m = raw.match(/^(\w+)\(([\s\S]*)\)\s*$/)
-  if (!m) return { name: '', body: raw }
+function formatToolContent(raw: string): { name: string; detail: string; body: string; output: string } {
+  const m = raw.match(/^(\w+)\((\{[\s\S]*\})\)(.*)$/s)
+  if (!m) return { name: '', detail: '', body: raw, output: '' }
+  const name = m[1]
+  const output = m[3].trim()
   try {
     const obj = JSON.parse(m[2])
-    // For execute_code, extract just the code/tool from steps
-    if (m[1] === 'execute_code' && obj.steps) {
-      const lines = obj.steps.map((s: any) => s.code ?? s.tool ?? JSON.stringify(s)).join('\n')
-      return { name: m[1], body: lines }
-    }
-    return { name: m[1], body: JSON.stringify(obj, null, 2) }
+    // Extract a useful detail: tool name or language
+    let detail = ''
+    if (obj.steps?.[0]?.tool) detail = obj.steps[0].tool
+    else if (obj.steps?.[0]?.code) detail = obj.language ?? 'bash'
+    return { name, detail, body: JSON.stringify(obj, null, 2), output }
   } catch {
-    return { name: m[1], body: m[2] }
+    return { name, detail: '', body: m[2], output }
   }
 }
 
 function ToolCall({ content }: { content: string }) {
-  const { name, body } = formatToolContent(content)
+  const { name, detail, body, output } = formatToolContent(content)
+  const [open, setOpen] = useState(false)
   return (
     <div class="tool-call">
-      <div class="tool-header">
-        <span class="tool-arrow">🖥️</span>
-        {name && <span class="tool-name">{name}</span>}
-      </div>
-      <pre class="tool-body">{body}</pre>
+      <details open={open} onToggle={(e: Event) => setOpen((e.target as HTMLDetailsElement).open)}>
+        <summary class="tool-header">
+          <span class="tool-arrow">🖥️</span>
+          {name && <span class="tool-name">{name}</span>}
+          {detail && <span class="tool-detail">{detail}</span>}
+        </summary>
+        <pre class="tool-body">{body}</pre>
+      </details>
+      {output && <pre class="tool-output">{output}</pre>}
     </div>
   )
 }
diff --git a/src/components/Sidebar.tsx b/src/components/Sidebar.tsx
index 712b060..4fdc73c 100644
--- a/src/components/Sidebar.tsx
+++ b/src/components/Sidebar.tsx
@@ -1,6 +1,7 @@
+import { useState } from 'preact/hooks'
 import type { IdxEntry } from '../lib/api'
 import type { Theme } from '../lib/theme'
-import { shortId, truncate } from '../lib/chat'
+import { truncate } from '../lib/chat'
 
 interface Props {
   sessions: IdxEntry[]
@@ -8,6 +9,7 @@ interface Props {
   onSelect: (id: string | null) => void
   onNew: () => void
   onKill: (id: string) => void
+  onRename: (id: string, newName: string) => void
   themes: Theme[]
   currentTheme: string
   onThemeChange: (name: string) => void
@@ -19,7 +21,21 @@ function stateClass(state: string) {
   return 'running' // thinking, calling: <tool>, etc.
 }
 
-export function Sidebar({ sessions, selectedId, onSelect, onNew, onKill, themes, currentTheme, onThemeChange }: Props) {
+export function Sidebar({ sessions, selectedId, onSelect, onNew, onKill, onRename, themes, currentTheme, onThemeChange }: Props) {
+  const [editingId, setEditingId] = useState<string | null>(null)
+  const [editValue, setEditValue] = useState('')
+
+  const startRename = (e: MouseEvent, id: string) => {
+    e.stopPropagation()
+    setEditingId(id)
+    setEditValue(id)
+  }
+
+  const commitRename = (oldId: string) => {
+    const name = editValue.trim()
+    setEditingId(null)
+    if (name && name !== oldId) onRename(oldId, name)
+  }
   return (
     <aside class="sidebar">
       <div class="sidebar-header">
@@ -49,7 +65,19 @@ export function Sidebar({ sessions, selectedId, onSelect, onNew, onKill, themes,
           >
             <div class="session-card-row">
               <div class={`state-dot ${stateClass(s.state)}`} />
-              <div class="session-id-label">{shortId(s.id)}</div>
+              {editingId === s.id ? (
+                <input
+                  class="session-rename-input"
+                  value={editValue}
+                  onInput={e => setEditValue((e.target as HTMLInputElement).value)}
+                  onBlur={() => commitRename(s.id)}
+                  onKeyDown={e => { if (e.key === 'Enter') commitRename(s.id); if (e.key === 'Escape') setEditingId(null) }}
+                  onClick={e => e.stopPropagation()}
+                  autoFocus
+                />
+              ) : (
+                <div class="session-id-label" onDblClick={(e: MouseEvent) => startRename(e, s.id)}>{s.id}</div>
+              )}
               <div class="session-state-label">{s.state}</div>
               <button
                 class="btn-kill"
diff --git a/src/lib/api.ts b/src/lib/api.ts
index 8d010e7..3830ae0 100644
--- a/src/lib/api.ts
+++ b/src/lib/api.ts
@@ -78,3 +78,11 @@ export async function browse9p(path: string): Promise<any> {
   if (ct.includes('text/plain')) return await r.text()
   return await r.json()
 }
+
+export async function renameSession(id: string, newName: string): Promise<void> {
+  await fetch(`/s/${id}`, {
+    method: 'PATCH',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ name: newName }),
+  })
+}
diff --git a/src/lib/chat.ts b/src/lib/chat.ts
index 0fd452c..5f08377 100644
--- a/src/lib/chat.ts
+++ b/src/lib/chat.ts
@@ -1,5 +1,5 @@
 export interface ChatMessage {
-  role: 'user' | 'assistant' | 'tool'
+  role: 'user' | 'assistant' | 'tool' | 'info'
   content: string
 }
 
@@ -20,6 +20,9 @@ export function parseChat(lines: string[]): ChatMessage[] {
     } else if (line.startsWith('-> ')) {
       if (cur) messages.push(cur)
       cur = { role: 'tool', content: line.slice(3) }
+    } else if (line.startsWith(':: ')) {
+      if (cur) messages.push(cur)
+      cur = { role: 'info', content: line.slice(3) }
     } else if (cur) {
       cur.content += '\n' + line
     }
diff --git a/src/style.css b/src/style.css
index 81a7548..d7a2063 100644
--- a/src/style.css
+++ b/src/style.css
@@ -580,7 +580,20 @@ input, select, textarea { font-family: inherit; }
   display: flex;
   align-items: center;
   gap: 6px;
-  padding: 6px 12px;
+  padding: 4px 10px;
+  cursor: pointer;
+  list-style: none;
+}
+.tool-header::-webkit-details-marker { display: none; }
+.tool-header::marker { display: none; content: ''; }
+.tool-header::before {
+  content: '▶';
+  font-size: 8px;
+  color: var(--text-faint);
+  transition: transform 0.15s;
+}
+details[open] > .tool-header::before {
+  transform: rotate(90deg);
 }
 .tool-arrow {
   font-size: 1.3em;
@@ -590,6 +603,11 @@ input, select, textarea { font-family: inherit; }
   color: var(--tool-text);
   font-weight: 600;
 }
+.tool-detail {
+  color: var(--text-faint);
+  font-size: 11px;
+  font-style: italic;
+}
 .tool-body {
   margin: 0;
   padding: 8px 14px;
@@ -601,6 +619,17 @@ input, select, textarea { font-family: inherit; }
   color: var(--text);
   overflow-x: auto;
 }
+.tool-output {
+  margin: 0;
+  padding: 6px 14px;
+  font-family: var(--mono);
+  font-size: 11px;
+  line-height: 1.5;
+  white-space: pre-wrap;
+  word-break: break-all;
+  color: var(--text-dim);
+  font-style: italic;
+}
 
 /* ---- Typing indicator ---- */
 .typing {
@@ -850,3 +879,31 @@ input, select, textarea { font-family: inherit; }
 }
 .tree-row-link { cursor: pointer; }
 .tree-row-link:hover .tree-path { text-decoration: underline; }
+
+/* ---- Inline rename ---- */
+.session-rename-input {
+  font-family: var(--mono);
+  font-size: 12px;
+  background: var(--bg-soft);
+  border: 1px solid var(--accent-focus);
+  border-radius: var(--r-sm);
+  padding: 2px 6px;
+  color: var(--text);
+  outline: none;
+  flex: 1;
+  min-width: 0;
+}
+
+/* ---- Info messages ---- */
+.message.info { justify-content: flex-start; }
+.message.info .msg-bubble {
+  background: transparent;
+  border: none;
+  padding: 2px 8px;
+}
+.info-text {
+  font-family: var(--mono);
+  font-size: 12px;
+  font-style: italic;
+  color: var(--text-faint);
+}