fix: title web slash command sessions (#1599)

* fix web slash command session titles

* docs update slash command title pr fragment

---------

Co-authored-by: Codex <codex@openai.com>

docs/chat-chain-changes/2026-06-16-web-slash-command-title.md

@@ -0,0 +1,6 @@
+---
+date: 2026-06-16
+pr: 1599
+feature: Web slash command session titles
+impact: New Web UI slash-command sessions now use the command text for their initial title instead of the generic Bridge command title.
+---

packages/server/src/services/hermes/run-chat/session-command.ts

@@ -88,7 +88,7 @@ export async function handleSessionCommand(
 ): Promise<void> {
   const state = getOrCreateSession(ctx.sessionMap, sessionId)
   ctx.socket.join(`session:${sessionId}`)
-  ensureCommandSession(sessionId, ctx)
+  ensureCommandSession(sessionId, command, ctx)
   const isKnownCommand = Boolean(COMMAND_ALIASES[command.rawName])
   if (command.name !== 'plan' && command.name !== 'skill' && isKnownCommand) {
     persistCommandMessage(sessionId, state, `/${command.rawName}${command.args ? ` ${command.args}` : ''}`)
@@ -827,17 +827,23 @@ function formatReloadSkillItem(item: unknown): string {
   return description ? `${name}: ${description}` : name
 }
 
-function ensureCommandSession(sessionId: string, ctx: SessionCommandContext) {
+function ensureCommandSession(sessionId: string, command: ParsedSessionCommand, ctx: SessionCommandContext) {
   if (getSession(sessionId)) return
   createSession({
     id: sessionId,
     profile: ctx.profile,
     source: 'cli',
     model: ctx.model,
-    title: 'Bridge command',
+    title: buildCommandSessionTitle(command),
   })
 }
 
+function buildCommandSessionTitle(command: ParsedSessionCommand): string {
+  const prefix = `[${command.rawName}]`
+  const args = command.args.replace(/\s+/g, ' ').trim()
+  return args ? `${prefix} ${args}`.slice(0, 120) : prefix
+}
+
 function persistCommandMessage(sessionId: string, state: SessionState, content: string) {
   const now = Math.floor(Date.now() / 1000)
   const id = addMessage({

tests/server/session-command-plan.test.ts

@@ -122,6 +122,36 @@ describe('plan session command', () => {
     expect(namespaceEmit).not.toHaveBeenCalledWith('session.command', expect.anything())
   })
 
+  it('creates a new slash-command session with a command-derived title', async () => {
+    getSessionMock.mockReturnValueOnce(null)
+    const state = { messages: [], isWorking: false, events: [], queue: [] }
+    const { bridge, nsp, runQueuedItem, sessionMap, socket } = makeContext(state, {
+      handled: true,
+      type: 'goal',
+      action: 'set',
+      message: 'Goal set.',
+      kickoff_prompt: 'build a todo app',
+    })
+    const { handleSessionCommand, parseSessionCommand } = await import('../../packages/server/src/services/hermes/run-chat/session-command')
+    const command = parseSessionCommand('/goal build a todo app')!
+
+    await handleSessionCommand('session-1', command, {
+      nsp: nsp as any,
+      socket: socket as any,
+      sessionMap,
+      bridge: bridge as any,
+      profile: 'default',
+      runQueuedItem,
+    })
+
+    expect(createSessionMock).toHaveBeenCalledWith(expect.objectContaining({
+      id: 'session-1',
+      profile: 'default',
+      source: 'cli',
+      title: '[goal] build a todo app',
+    }))
+  })
+
   it('starts an idle /skill command with expanded storage and visible command display', async () => {
     const state = { messages: [], isWorking: false, events: [], queue: [] }
     const { bridge, namespaceEmit, nsp, runQueuedItem, sessionMap, socket } = makeContext(state, {