dsh-plugin-loud-failure

A tool call can exit 0 and still have failed. pandoc drops a glyph with only a warning line; a pipe scours a Python traceback out of the visible window; a semicoloned chain hides command not found behind the next command's exit status; NumPy prints a RuntimeWarning and hands back an array full of NaN. The model reads "success," but the mistake has already traveled downstream.\n\nloud-failure is a single tools/post-execute waterfall listener. It does not modify any tool or loop. After every tool execution it matches the returned text against a regex rule table; on a hit it either blocks the result (converting it to an isError whose content leads with the explanation and preserves the original output) or attaches a short notice that lands in the model's next request. Thirteen built-in rules cover real-world signatures: pandoc missing characters, Python tracebacks, shell command-not-found, NumPy runtime warnings, PowerShell NativeCommandError, Unicode replacement characters, and more. Every rule can be overridden or extended from your profile configuration.\n\nBuilt for developers whose DeepSeek Harness sessions call shell, pandoc, or Python tools frequently. The plugin is intentionally small: 87 automated tests cover rule merging, compilation, filters, excerpt bounds, and clean unmount. A broken rule table is rejected at boot, so a misconfiguration fails fast rather than on the first tool call.