v0.19.0

The voice agent never speaks tool-call syntax again, and call events say what tools actually did. cli-v0.18.0 cut alongside; the SDK is unchanged and stays at hail-sdk==0.13.0.

Voicebot speech sanitizer

• LLM turns that are tool-call syntax (code fences, bare JSON — seen when fast-tier models leak arguments as text during IVR navigation) are no longer spoken or recorded as agent turns; the IVR prompt now names an explicit nothing-to-say reply instead of the impossible "say nothing".
• tool_call events now carry per-call arguments (string values capped at 200 chars); hail tail renders them as send_dtmf(digits=2).
• New person_detected call event marks the machine→person handoff after IVR navigation; hail tail uses it (with the AMD verdict) to label phone-tree speech [machine] even when transcripts arrive after the verdict.

CLI

• hail tail no longer prints per-second [wait] . filler lines (shipped in 0.18.0, removed after real-world use: they drowned the transcript).

Internal

• Repo conformed to ruff 0.16 defaults (mechanical fixes plus documented rule ignores for FastAPI and resilience idioms); .claude excluded from lint walks.