jack/PPT @ 530cd82f0d8eb7dc52d11c6cae7b80ca41831546

jimmylee 530cd82f0d docs: clarify task hint session cache		5 kuukautta sitten
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2026-04-25-english-speaking-dialogue-prompt-design.md	d2b22fbc40 docs(speaking): add design spec and implementation plan for grade-aware system prompt	5 kuukautta sitten
2026-04-25-english-speaking-task-hint-modal-design.md	530cd82f0d docs: clarify task hint session cache	5 kuukautta sitten