Orion/2. Areas/Home Personal/knowledge/hermes-large-write-payload-truncation.md
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# Hermes tool gotcha: very large write_file/execute_code payloads truncate silently
**Date:** 2026-09-28
**Symptom:** A single large `write_file` / `execute_code` payload is cut off mid-generation — reproducibly at the same token — with no error; the file/script is silently incomplete.
**Diagnosis path:** Byte-count the written file against the expected size; syntax-check (`node --check`, `python -m py_compile`) rather than trusting the tool's success result.
**Fix / workaround:** Build big files by appending small ~30-line chunks, verifying byte count + syntax after each append.
Related second gotcha: `pkill -f <pattern>` can match and kill the agent's own tool shell. Kill by explicit PID parsed from `ss -tlnp` instead.
Related: [[Troubleshooting Index]] · [[RESTORE-HERMES]]