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Key features

• Per-request complexity classification — deepseek-v4-flash called directly (never through a proxy, no recursion).
• Context-aware judging — injects a rolling session-goal summary plus the recent turns into the classifier prompt (continuation / wrap-up / error-loop rules).
• Sticky level protection — a mid-task downgrade is held at the previous level unless the message carries explicit downgrade or wrap-up signals.
• Config-driven routing chains — chains come from pool.json → routing.levels ($active expands to the active provider, missing entries fall back to defaults)
• transport failures walk down the chain.