- Add an Alternatives section comparing Code Mode against the narrower
result-elision/summarization route over native tool-calling (solves
context-bloat but not composition/round-trips) and against parallel native
dispatch (a core-loop change that still lacks composition); states why
Code Mode is chosen and why the new code-execution surface is the price.
- Fix the Problem-section framing: it said the model "can run independent
calls concurrently," which contradicted the serialize-by-default decision.
Reworded to "express fan-out, initially serialized until concurrency-safety
metadata exists" — early win is composition + fewer round-trips, not parallelism.
Tianyi Cui
1b7c376aec