fix: handle EAGAIN in hook scripts when stdin is non-blocking#165

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ikbear wants to merge 3 commits intoopenai:mainfrom

ikbear:fix/eagain-hook-stdin

Commits on Apr 7, 2026

fix: handle EAGAIN in hook scripts when stdin is non-blocking
billionverifier
committed
fix: buffer stdin chunks across EAGAIN retries to avoid losing partial reads
billionverifier
committed
fix: return empty input immediately when EAGAIN retries are exhausted
ikbear
committed