Filesystem Tools

# Read first 100 lines
read_file("src/main.py", offset=0, limit=100)

# Read lines 200-300
read_file("src/main.py", offset=200, limit=100)

Lines 1-100 of 450 (use offset=100 to read more)
1	import asyncio
2	from pathlib import Path
3	...

# Basic search
grep("def process", path="src/")

# With context lines (like grep -C 3)
grep("TODO", context=3)

# Case-insensitive with glob filter
grep("error", glob_filter="*.py", case_insensitive=True)

# Before/after context (like grep -B 2 -A 5)
grep("raise ValueError", before=2, after=5)

Edited src/main.py (line 42):
- old_function()
+ new_function()
(1 lines removed, 1 lines added)

glob("**/*.py")           # All Python files
glob("src/**/*.test.ts")  # All test files in src/

tools:
  fs:
    builtin: "filesystem"