fix(workspace): open the same-name question on No, and compare names once per list

The TUI's duplicate-name question used a confirm dialog that opens on Confirm,
so a stray Enter created the duplicate; it is now a select that opens on No.
The namesake is computed once per list, the CLI prompt keeps a server-supplied
name on one line, and naming and comparing share one normaliser.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0172qrhMa5TQgETASi5hxMqD

Author: ralphstodomingo

packages/opencode/src/altimate/workspace/workspace-name.ts

@@ -15,10 +15,7 @@
  * what the model reads. */
 export const MAX_WORKSPACE_NAME_CHARS = 80
 export function inertWorkspaceName(name: string): string {
-  const cleaned = name
-    .replace(/[\u0000-\u001F\u007F-\u009F\u2028\u2029]+/g, " ")
-    .replace(/\s+/g, " ")
-    .trim()
+  const cleaned = oneLine(name)
   const points = Array.from(cleaned)
   return points.length > MAX_WORKSPACE_NAME_CHARS ? points.slice(0, MAX_WORKSPACE_NAME_CHARS - 1).join("") + "…" : cleaned
 }
@@ -48,15 +45,20 @@ export function workspaceLabel(name: string, id: string | undefined, budget = MA
   return label.length > budget ? suffix.trim() : label
 }
 
-/** A name as the link pickers compare it: control characters and runs of whitespace
- * collapsed, trimmed, and the sharp S spelled out, which collation otherwise keeps
- * apart from "ss". */
-function comparableName(name: string): string {
+/** A name on one line: control characters (C0, DEL and C1) and the Unicode line and
+ * paragraph separators become spaces, runs of whitespace collapse, ends are trimmed.
+ * The one normalisation both the rendered and the compared name start from. */
+function oneLine(name: string): string {
   return name
     .replace(/[\u0000-\u001F\u007F-\u009F\u2028\u2029]+/g, " ")
     .replace(/\s+/g, " ")
     .trim()
-    .replace(/[ßẞ]/g, "ss")
+}
+
+/** A name as the link pickers compare it: on one line, and the sharp S spelled out,
+ * which collation otherwise keeps apart from "ss". */
+function comparableName(name: string): string {
+  return oneLine(name).replace(/[ßẞ]/g, "ss")
 }
 
 /** The first listed workspace already named what a quick create would call this

packages/opencode/src/cli/cmd/link.ts

@@ -43,7 +43,7 @@ import {
 } from "@/altimate/workspace/browser-handoff"
 import { accountDigest, recordApprovedBinding } from "@/altimate/workspace/state"
 import type { SeedOutcome } from "@/altimate/workspace/memory-backfill"
-import { sameNamedWorkspace } from "@/altimate/workspace/workspace-name"
+import { inertWorkspaceName, sameNamedWorkspace } from "@/altimate/workspace/workspace-name"
 
 const CREATE_NEW_SENTINEL = "__create_new__"
 const SET_UP_IN_BROWSER_SENTINEL = "__browser_handoff__"
@@ -342,7 +342,7 @@ export const LinkCommand = cmd({
     // Both create paths start from the project's name, so both confirm a namesake.
     if ((pick === SET_UP_IN_BROWSER_SENTINEL || pick === CREATE_NEW_SENTINEL) && namesake) {
       const again = await prompts.confirm({
-        message: `A workspace named "${stripControlChars(namesake.name)}" already exists. Create another one with the same name?`,
+        message: `A workspace named "${inertWorkspaceName(namesake.name)}" already exists. Create another one with the same name?`,
         initialValue: false,
       })
       if (prompts.isCancel(again) || !again) {

packages/opencode/src/plugin/tui/altimate/workspace.tsx

@@ -31,7 +31,7 @@ import * as Manage from "@/altimate/workspace/manage"
 import { describeSyncProblems } from "@/altimate/workspace/skill-sync"
 import { inertWorkspaceName, sameNamedWorkspace } from "@/altimate/workspace/workspace-name"
 // altimate_change end
-import { createSignal, onCleanup, onMount } from "solid-js"
+import { createMemo, createSignal, onCleanup, onMount } from "solid-js"
 import {
   ConflictError,
   HIDDEN_BINDING_MESSAGE,
@@ -1000,10 +1000,11 @@ function OnDemandPickerDialog(props: OnDemandPickerProps) {
 
   // A listed workspace already named what a quick create would use: the picker
   // opens on it, and creating a namesake is confirmed first.
-  const namesake = () => {
+  // Once per list, not once per row: the options below read it for every workspace.
+  const namesake = createMemo(() => {
     const list = datamates()
     return list ? sameNamedWorkspace(list, props.defaultName) : undefined
-  }
+  })
 
   const options = () => {
     const list = datamates()
@@ -1059,12 +1060,24 @@ function OnDemandPickerDialog(props: OnDemandPickerProps) {
             create()
             return
           }
+          // A select rather than DialogConfirm, which opens on Confirm: here a
+          // stray Enter must not create the duplicate, so the dialog opens on No.
           props.api.ui.dialog.replace(() => (
-            <props.api.ui.DialogConfirm
-              title="Create a workspace with the same name?"
-              message={`A workspace named "${inertWorkspaceName(twin.name)}" already exists. Create another one called "${props.defaultName}"?`}
-              onConfirm={create}
-              onCancel={() => props.api.ui.dialog.clear()}
+            <props.api.ui.DialogSelect<string>
+              title={`A workspace named "${inertWorkspaceName(twin.name)}" already exists`}
+              options={[
+                { title: "No, don't create it", value: "no", description: "Nothing changes." },
+                {
+                  title: `Yes, create another "${props.defaultName}"`,
+                  value: "yes",
+                  description: "Two workspaces will share this name.",
+                },
+              ]}
+              current="no"
+              onSelect={(choice) => {
+                if (choice.value === "yes") create()
+                else props.api.ui.dialog.clear()
+              }}
             />
           ))
           return