safe-file-writing
Safe ways to edit/overwrite files in Hermes Agent. Avoids file corruption from write_file on large files and Excel file locks.
Datos de origen
- Repositorio
- crimsonblazezero/Zero-Tools
- Última actividad en el origen
- 3 de agosto de 2026 a las 15:27
- Idioma detectado de SKILL.md
- inglés
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Instrucciones de origen · Vista previa de solo lectura- name
- safe-file-writing
- description
- Safe ways to edit/overwrite files in Hermes Agent. Avoids file corruption from write_file on large files and Excel file locks.
- tags
- ["file","write","patch","safe-editing"]
# Safe File Writing
## ⚠️ Never Use write_file for Large Files
When editing or overwriting scripts >400 lines, **always use `patch` instead of `write_file`**. `write_file` truncates long content silently, producing corrupt but compilable-looking files.
## Safe Editing Patterns
### Pattern 1: Patch Only (Preferred)
```bash
# Only modify the exact lines you need to change
patch --path scripts/weekly_report.py \
--old "old line" \
--new "new line"
```
### Pattern 2: Import and Run
When you need to generate output without risking the source file:
```python
# Create a small wrapper script
import sys
sys.path.insert(0, 'scripts')
from weekly_report import *
# Use existing functions directly
build_excel(wk_m, mo_m, fb_agg, wt, mt, 'output.xlsx')
```
### Pattern 3: Backup First
If you absolutely must rewrite:
1. Copy original first
2. Write new content
3. Verify compilation before deleting backup
## Excel File Locks
`.xlsx` files locked by Excel → openpyxl raises PermissionError.
**Fix:** Write to a new filename like `xxx_v19_new.xlsx`, never overwrite the open file.
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