fix(tui): prefer exact slash command matches (#15813)

ui-tui/src/__tests__/createSlashHandler.test.ts

@@ -298,6 +298,45 @@ describe('createSlashHandler', () => {
     expect(ctx.transcript.panel).toHaveBeenCalledWith(expect.any(String), expect.any(Array))
   })
 
+  it('lets exact catalog commands win over longer prefix matches', async () => {
+    const ctx = buildCtx({
+      local: {
+        catalog: {
+          canon: {
+            '/status': '/status',
+            '/statusbar': '/statusbar'
+          }
+        }
+      }
+    })
+
+    expect(createSlashHandler(ctx)('/status')).toBe(true)
+    await vi.waitFor(() => {
+      expect(ctx.gateway.gw.request).toHaveBeenCalledWith('slash.exec', {
+        command: 'status',
+        session_id: null
+      })
+    })
+    expect(ctx.transcript.sys).not.toHaveBeenCalledWith(expect.stringContaining('ambiguous command'))
+  })
+
+  it('keeps ambiguous prefix handling when there is no exact catalog match', () => {
+    const ctx = buildCtx({
+      local: {
+        catalog: {
+          canon: {
+            '/status': '/status',
+            '/statusbar': '/statusbar'
+          }
+        }
+      }
+    })
+
+    expect(createSlashHandler(ctx)('/stat')).toBe(true)
+    expect(ctx.transcript.sys).toHaveBeenCalledWith('ambiguous command: /status, /statusbar')
+    expect(ctx.gateway.gw.request).not.toHaveBeenCalled()
+  })
+
   it('falls through to command.dispatch for skill commands and sends the message', async () => {
     const skillMessage = 'Use this skill to do X.\n\n## Steps\n1. First step'
 

ui-tui/src/app/createSlashHandler.ts

@@ -47,7 +47,13 @@ export function createSlashHandler(ctx: SlashHandlerContext): (cmd: string) => b
 
     if (catalog?.canon) {
       const needle = `/${parsed.name}`.toLowerCase()
+      const exact = Object.entries(catalog.canon).find(([alias]) => alias.toLowerCase() === needle)?.[1]
 
+      if (exact) {
+        if (exact.toLowerCase() !== needle) {
+          return handler(`${exact}${argTail}`)
+        }
+      } else {
         const matches = [
           ...new Set(
             Object.entries(catalog.canon)
@@ -66,6 +72,7 @@ export function createSlashHandler(ctx: SlashHandlerContext): (cmd: string) => b
           return true
         }
       }
+    }
 
     gw.request<SlashExecResponse>('slash.exec', { command: cmd.slice(1), session_id: sid })
       .then(r => {