add mini-context-graph skill (#1580)

* add mini-context-graph skill

* remove pycache files

* filename case update to SKILL.md

* update readme

skills/mini-context-graph/scripts/config.py

@@ -0,0 +1,23 @@
+"""
+config.py — Global configuration constants for the Context Graph Skill.
+
+Data directories are resolved from environment variables so the skill can be
+used from any project without writing data inside the skill package itself.
+
+  MINI_CONTEXT_GRAPH_DATA_DIR  — where graph.json, index.json, etc. live
+  MINI_CONTEXT_GRAPH_WIKI_DIR  — where wiki pages, index.md, and log.md live
+
+Both default to subdirectories of the current working directory when the env
+vars are not set, so data ends up in the consuming project's directory.
+"""
+
+import os
+from pathlib import Path
+
+_BASE = Path(os.environ.get("MINI_CONTEXT_GRAPH_BASE", str(Path.cwd())))
+DATA_DIR = Path(os.environ.get("MINI_CONTEXT_GRAPH_DATA_DIR", str(_BASE / "data")))
+WIKI_DIR = Path(os.environ.get("MINI_CONTEXT_GRAPH_WIKI_DIR", str(_BASE / "wiki")))
+
+MAX_GRAPH_DEPTH: int = 2
+MIN_CONFIDENCE: float = 0.6
+MAX_NODES: int = 50