Teknium 5e7bca95d9 fix(tui): coalesce render frames while stdout backpressure is unresolved (#31486) (#54171) ... When the previous frame's stdout.write has not drained (the outer terminal parser is overwhelmed by a wide CR+LF burst — CJK + ANSI tool output on a high-context session), the renderer kept writing a new frame every tick. That piled writes onto an already-backed-up pipe and kept the macrotask queue hot, starving the stdin 'readable' callback — the observed stdin freeze where the agent loop keeps running but keystrokes/Ctrl-C are dead. onRender now coalesces: while pendingWriteStart is non-null (prior write's drain callback hasn't fired) it skips the frame and retries on the drain tick instead of writing. A MAX_COALESCED_BACKPRESSURE_FRAMES ceiling forces a write through after N skips so a terminal whose drain callback never fires (OSError EIO on flush) self-heals once the pipe recovers rather than wedging forever. TTY-only; piped stdout has no flow control. Coalesce counter resets on every real write. This is the stdout-backpressure strand left open after #54046 fixed the swallowed-exception strand.		2026-06-28 04:00:22 -07:00
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hermes-ink	fix(tui): coalesce render frames while stdout backpressure is unresolved (#31486) (#54171)	2026-06-28 04:00:22 -07:00