Models stage-d (default) + stage-e (next-edit companion); extension 0.6.1

- stage-d: next-line / block-close / multi-line fixes, symbols format 2, TS errors in the header.
  Held-out: 0.426 exact / 0.700 edit sim (stage-c 0.405 / 0.689); block close 0.27 -> 0.79.
- stage-e: next-edit (80% exact region rewrites, abstains on 100% of no-edit samples).
- Manifest: nextEditModel (companion) and nextEditFormat (older extensions ignore it, so they
  never use next-edit with the empty-output deletion bug).
- Daemon: next-edit served by the companion model in a second llama-server, started after the
  main model loads.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01J39imRDT8L7xYbWzsVWd8A

daemon/src/config.ts

@@ -18,6 +18,8 @@ export interface ModelProfile {
   members?: boolean
   /** Trained for next-edit prediction (shared/nextedit.ts), enables /v1/next-edit. */
   nextEdit?: boolean
+  /** Another profile (trained with nextEdit) that serves /v1/next-edit for this model, in a second llama-server. */
+  nextEditModel?: string
 }
 
 export interface DaemonConfig {
@@ -86,6 +88,7 @@ export function loadConfig(configPath: string): DaemonConfig {
   if (!raw.models[raw.defaultModel]) throw new Error(`defaultModel ${raw.defaultModel} is not in models`)
   for (const [name, m] of Object.entries(raw.models)) {
     if (!m.modes.includes(m.defaultMode)) throw new Error(`model ${name}: defaultMode must be one of its modes`)
+    if (m.nextEditModel && !raw.models[m.nextEditModel]?.nextEdit) throw new Error(`model ${name}: nextEditModel ${m.nextEditModel} must be a profile with nextEdit`)
   }
   return raw
 }