OntoIndex Guide

Quick reference for all OntoIndex MCP tools, resources, and the knowledge graph schema.

Always Start Here

For any task involving code understanding, debugging, impact analysis, or refactoring:

1. Read ontoindex://repo/{name}/context — codebase overview + check index freshness
2. Match your task to a skill below and read that skill file
3. Follow the skill's workflow and checklist

If step 1 warns the index is stale, run npx ontoindex analyze in the terminal first.

Skills

Task	Skill to read
Understand architecture / "How does X work?"	ontoindex-exploring
Blast radius / "What breaks if I change X?"	ontoindex-impact-analysis
Trace bugs / "Why is X failing?"	ontoindex-debugging
Rename / extract / split / refactor	ontoindex-refactoring
Tools, resources, schema reference	ontoindex-guide (this file)
Index, status, clean, wiki CLI commands	ontoindex-cli

Tools Reference

Tool	What it gives you
query	Process-grouped code intelligence — execution flows related to a concept
context	360-degree symbol view — categorized refs, processes it participates in
impact	Symbol blast radius — what breaks at depth 1/2/3 with confidence
detect_changes	Git-diff impact — what do your current changes affect
rename	Multi-file coordinated rename with confidence-tagged edits
cypher	Raw graph queries (read ontoindex://repo/{name}/schema first)
list_repos	Discover indexed repos

Resources Reference

Lightweight reads (~100-500 tokens) for navigation:

Resource	Content
ontoindex://repo/{name}/context	Stats, staleness check
ontoindex://repo/{name}/clusters	All functional areas with cohesion scores
ontoindex://repo/{name}/cluster/{clusterName}	Area members
ontoindex://repo/{name}/processes	All execution flows
ontoindex://repo/{name}/process/{processName}	Step-by-step trace
ontoindex://repo/{name}/schema	Graph schema for Cypher

Graph Schema

Nodes: File, Function, Class, Interface, Method, Community, Process Edges (via CodeRelation.type): CALLS, IMPORTS, EXTENDS, IMPLEMENTS, DEFINES, MEMBER_OF, STEP_IN_PROCESS

MATCH (caller)-[:CodeRelation {type: 'CALLS'}]->(f:Function {name: "myFunc"})
RETURN caller.name, caller.filePath