Llama.cpp budget flags curb Qwen3.5 overthinking

Reasoning models that can't stop reasoning are a real UX problem, and this two-flag fix is the kind of pragmatic hack local-inference users actually need.

• –`--reasoning-budget <N>` caps the thinking block at N tokens, preventing infinite refinement spirals
• –`--reasoning-budget-message` appends a stop phrase that nudges the model to skip straight to the answer
• –The author warns that very low budgets (<1024 tokens) degrade output quality — there's a tradeoff between stopping the loop and giving the model enough space to actually think
• –This is already merged into llama.cpp and likely generalizable to other inference engines with similar budget-control flags
• –Qwen3.5's MoE architecture (35B-A3B) makes it attractive for local deployment, so taming its thinking verbosity has real practical value