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* fix(runtime): guard writeToStdout/writeToStderr against post-teardown writes (Ink parity, G20) Return early if teardownStarted, mirroring Ink ink.tsx:673/702, so a write after unmount (e.g. a stray useStdout().write or console.log routed through writeToStdout after teardown) cannot run clear()/write/restore on an already-torn-down renderer and corrupt the restored terminal state. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> * chore(parity): ledger — G20 pr-open, reconcile G19 merged Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>