Merge pull request 'Point the example config at Opus 5.5, with Haiku as consultant' (#48) from example-opus-5-5 into main

Planner and delegate use claude-opus-5-5 for the high-end judgement
those roles need. The consultant answers single questions with no tools,
so it uses claude-haiku-4-5. Sonnet has no role.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

nisse-dev.example.yaml

@@ -20,10 +20,10 @@ llm:                                  # A5: LiteLLM is the only LLM destination
   max_output_tokens: 16384
 
 roles:                                # A11: role -> LiteLLM model alias
-  executor: local-fast
-  planner: claude-opus-5
-  delegate: claude-opus-5
-  consultant: claude-opus-5
+  executor: local-fast          # the local tier; the benchmark picks the model
+  planner: claude-opus-5-5      # high-end judgement: plans a weaker executor follows
+  delegate: claude-opus-5-5     # takes over what the executor got stuck on
+  consultant: claude-haiku-4-5  # one question at a time, no tools: cheap is enough
 
 matrix:                               # A1
   homeserver: https://matrix.example