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>

install.sh

@@ -221,8 +221,9 @@ if [ "$starter" -eq 1 ] && [ ! -e "$CONFIG/config.yaml" ]; then
 # The full list: https://llembas.eu/docs/. An editor with a YAML language server
 # completes and checks keys as you type (the first line points it at the schema).
 
-# The model to start with, as connection/model from connections.yaml.
-# model: local/qwen3
+# The model to start with, by its id on the LLeMbas server you log in to (lembas models lists
+# them). Unset: the server's default for your account.
+# model: deepseek/deepseek-flash
 
 # manual (asks before changes) | edit (changes files in the project freely) | plan
 mode: manual
@@ -237,27 +238,14 @@ fi
 if [ "$starter" -eq 1 ] && [ ! -e "$CONFIG/connections.yaml" ]; then
   (umask 077 && cat >"$CONFIG/connections.yaml" <<'YAML'
 # yaml-language-server: $schema=schema/connections.schema.json
-# Where the models are. Global only: a project can never point LLeMbas CLI elsewhere.
-# Keys are never written here in plain text: {env:VAR}, {file:~/path}, or key_cmd.
-# Then set `model: <connection>/<model>` in config.yaml, and check with `lembas models`.
+# The LLeMbas server this machine is logged in to. Global only: a project can never point
+# LLeMbas CLI elsewhere. Written by `lembas login <address>`, not by hand; the models come from
+# the server at every start (`lembas models` lists them).
 connections: {}
-#
-# connections:
-#   local:                              # llama.cpp / llama-swap / vLLM / LM Studio — OpenAI-compatible
-#     dialect: openai-chat
-#     base_url: http://127.0.0.1:8080/v1
-#     models:
-#       qwen3: { context: 131072, max_output: 65536 }
-#   anthropic:
-#     dialect: anthropic
-#     base_url: https://api.anthropic.com
-#     api_key: "{env:ANTHROPIC_API_KEY}"
-#     models:
-#       claude-sonnet-5: { context: 200000 }
 YAML
   )
   chmod 600 "$CONFIG/connections.yaml"
-  say "  wrote $CONFIG/connections.yaml (0600) — add a connection there"
+  say "  wrote $CONFIG/connections.yaml (0600) — lembas login <address> fills it in"
 fi
 # The schemas for editors follow the binary, so they are rewritten on every install.
 "$TARGET" config schema >/dev/null && say "  wrote $CONFIG/schema/ (JSON Schemas for editors)"