[Bug] Non-blocking status code error with no stderr output

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Matched on shared title terms, labels, topic and reported release — ranked so issues with real discussion come first.

• [BUG] Stderr not in transript (Ctrl + O) when SessionStart hook fails with non-blocking status code
  Resolved 💬 4 v2.1.25 #23491
• [BUG] Stop hook exit code 2 downgraded to non-blocking when stderr contains unrelated 'no such file'
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• [BUG] UserPromptSubmit hook doesn't display stderr output on non-zero exit code
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• [FEATURE] Please add non blocking diffs.
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• [Bug] Claude ignores non-fatal tool output — warnings and stderr treated as success
  Resolved 💬 7 v2.1.71 #32657
• [BUG] Hook stderr not visible in verbose mode when agent is blocked (v2.1.34)
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• SessionStart hook stderr not displaying in terminal
  Resolved 💬 2 #12653

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