Custom connections are gone: the CLI talks to the LLeMbas server it is logged in to

LLeMbas CLI 2.0 is LLeMbas-server-specific (CLI rule 2). Removed: the
anthropic, gemini, ollama and responses clients, context discovery and
llama-swap unloading (discover.ts), the Connection schema with its dialect,
auth, key_cmd, discover, unload_url and one_model_at_a_time, the model
`fallback` (it only ever moved to another server), effort_map and cache, and
the multi-connection refs. Kept: openai-chat, http, sse, think, effort,
tokens and all of src/lembas.

- connections.yaml holds the login (`type: webui`, as lembas login writes
  it). A custom entry from 1.x is read past with a warning that says how to
  log in, so an old file still starts; with several logins left, the latest
  is used and the others named.
- A model's ref is the id the server serves it under; the older forms
  (`<login>/<id>`, `<login>/<model>`) still resolve and config.yaml is
  rewritten once. Without a login there is no model, and the error (and the
  first-run screen, now the sign-in alone) says `lembas login <address>`.
- A login to another server signs this machine out of the previous one.
- The window is the server's word (no discovery); a capacity group comes
  from the server's `capacity.group` alone; embeddings use the server's
  /v1/embeddings.
- `lembas models` lists the server's models; install.sh's starter files, the
  README and the JSON schemas say the same.

Tests: every fixture is a login now (the fake server lists models, answers
other GETs with 404, and can hand one model to another script, as a server
with several backends); the dialect suites and the cross-connection tests are
gone with their code.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/fake-provider.ts

@@ -11,8 +11,12 @@ export interface Fake {
   stop(): void
 }
 
-/** `show`: what Ollama's /api/show answers (404 when not given); it takes no scripted response. */
-export function fakeProvider(script: Scripted[], opts: { show?: unknown } = {}): Fake {
+/** `route`: another fake that answers for a model (by the id in the request), as one LLeMbas server
+ *  serves models from several backends — the request is passed to it whole, and recorded there. */
+/** `served`: what GET /v1/models lists, as a LLeMbas server lists its models (default two
+ *  placeholders). Any other GET — the instance's own description, its personalization — is a 404,
+ *  which a client reads as "this server does not have it". */
+export function fakeProvider(script: Scripted[], opts: { route?: (model: string) => Fake | undefined; served?: Record<string, unknown>[] } = {}): Fake {
   const requests: any[] = []
   const calls: { path: string; headers: Record<string, string> }[] = []
   let i = 0
@@ -21,11 +25,13 @@ export function fakeProvider(script: Scripted[], opts: { show?: unknown } = {}):
     async fetch(req) {
       const url = new URL(req.url)
       if (req.method !== "POST" || url.pathname.endsWith("/unload")) calls.push({ path: url.pathname + url.search, headers: Object.fromEntries(req.headers.entries()) })
-      if (url.pathname.endsWith("/models")) return Response.json({ data: [{ id: "m1", meta: { n_ctx: 32768 } }, { id: "m2", max_model_len: 8192 }] })
+      if (url.pathname.endsWith("/models")) return Response.json({ data: opts.served ?? [{ id: "m1", meta: { n_ctx: 32768 } }, { id: "m2", max_model_len: 8192 }] })
       if (url.pathname.endsWith("/props")) return url.pathname.includes("/upstream/swapped/") ? Response.json({ default_generation_settings: { n_ctx: 16384 } }) : new Response("no", { status: 404 })
       if (url.pathname.endsWith("/unload")) return new Response("ok")
-      if (url.pathname.endsWith("/api/show")) return opts.show ? Response.json(opts.show) : new Response("not found", { status: 404 })
-      const body = await req.json()
+      if (req.method === "GET") return new Response("not found", { status: 404 })
+      const body = (await req.json()) as any
+      const to = typeof body?.model === "string" ? opts.route?.(body.model) : undefined
+      if (to) return fetch(to.url.replace(/\/v1$/, "") + url.pathname + url.search, { method: "POST", headers: req.headers, body: JSON.stringify(body) })
       requests.push(body)
       calls.push({ path: url.pathname + url.search, headers: Object.fromEntries(req.headers.entries()) })
       const r = script[i++]