"""
Pattern operations for the Fabric MCP Server.
This module contains functions for:
- Reading pattern content
- Listing all available patterns
"""
from ._types import PatternInfo
from .paths import get_patterns_dir
from .text import humanize_name, extract_pattern_description
def get_pattern_content(name: str) -> str | None:
"""Read the system.md content for a given pattern name."""
patterns_dir = get_patterns_dir()
pattern_file = patterns_dir / name / "system.md"
if not pattern_file.exists():
return None
return pattern_file.read_text(encoding="utf-8")
def list_all_patterns() -> list[PatternInfo]:
"""
List all available patterns with their metadata.
Returns:
List of PatternInfo dicts with 'name', 'human_name', 'description', and 'system_md_path'
"""
patterns_dir = get_patterns_dir()
if not patterns_dir.exists():
return []
patterns = []
for item in sorted(patterns_dir.iterdir()):
system_md = item / "system.md"
if item.is_dir() and system_md.exists():
extracted_desc = extract_pattern_description(system_md)
human_name = humanize_name(item.name)
if extracted_desc:
description = f"{human_name}: {extracted_desc}"
else:
description = f"Fabric pattern: {human_name}"
# Add usage hint to help LLM understand how to invoke with strategy
description += " [Supports optional 'strategy' argument like 'cot', 'tot' for enhanced reasoning]"
patterns.append(PatternInfo(
name=item.name,
human_name=human_name,
description=description,
system_md_path=system_md
))
return patterns
