Transfer code between files with line-based precision. Use when users request copying code from one location to another, moving functions or classes between files, extracting code blocks, or inserting code at specific line numbers.
npxskills add mhattingpete/claude-skills-marketplace--skill code-transferLoading…
Transfer code between files with precise line-based control. Dual-mode operation: native tools (1-10 files) or execution mode (10+ files, 90% token savings).
Use Read, Edit, Bash scripts for 1-10 file operations. Works immediately, no setup required.
from api.filesystem import batch_copy
from api.code_analysis import find_functions
functions = find_functions('app.py', pattern='handle_.*')
operations = [{
'source_file': 'app.py',
'start_line': f['start_line'],
'end_line': f['end_line'],
'target_file': 'handlers.py',
'target_line': -1
} for f in functions]
batch_copy(operations)
Read(file_path="src/auth.py") # Full file
Read(file_path="src/auth.py", offset=10, limit=20) # Line range
Grep(pattern="def authenticate", -n=true, -A=10) # Find function
Use line_insert.py script for line-based insertion:
python3 skills/code-transfer/scripts/line_insert.py <file> <line_number> <code> [--backup]
Examples:
# Insert function at line 50
python3 skills/code-transfer/scripts/line_insert.py src/utils.py 50 "def helper():\n pass"
# Insert with backup
python3 skills/code-transfer/scripts/line_insert.py src/utils.py 50 "code" --backup
# Insert at beginning
python3 skills/code-transfer/scripts/line_insert.py src/new.py 1 "import os"
When to use:
Use Edit when insertion point is relative to existing code:
Edit(
file_path="src/utils.py",
old_string="def existing():\n pass",
new_string="def existing():\n pass\n\ndef new():\n return True"
)
Grep(pattern="def validate_user", -n=true, -A=20)Read(file_path="auth.py", offset=45, limit=15)Read(file_path="validators.py")line_insert.py or Edit based on contextGrep(pattern="class DatabaseConnection", -n=true, -A=50)Read(file_path="original.py", offset=100, limit=50)Write(file_path="database.py", content="<extracted>")Edit in original fileEdit with replacementRead(file_path="main.py", offset=20, limit=10)python3 skills/code-transfer/scripts/line_insert.py main.py 25 "logger.info('...')" --backupRead(file_path="main.py", offset=23, limit=5)Read(file_path="utils.py")Grep(pattern="^def |^class ", -n=true)Write new filesPlanning:
Preservation:
Validation:
Backups:
--backup for significant changes
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