ontomics
Semantic codebase indexing that turns 19 tool calls into one. Built on tree-sitter parsing and TF-IDF clustering, it extracts domain concepts, naming conventions, and behavioral similarity from Python, TypeScript, JavaScript, and Rust repos. Query concepts across a project with `query_concept` and `locate_concept`, check identifier naming with `check_naming`, trace type flows with `trace_type`, or find behaviorally similar functions using CodeRankEmbed embeddings via `find_similar_logic`. The index runs locally with no API keys and includes `ontology_diff` for tracking vocabulary changes across git refs. Most useful when onboarding to large codebases or enforcing naming consistency across teams. Requires a git repository and auto-indexes on first run.
- GitHub stars
- 34
- tools
- 19
- transport
- STDIO
- last updated
- Apr 14, 2026
Tools
19 toolsPublic tool metadata for what this MCP can expose to an agent.
query_conceptFind all variants, related concepts, and occurrences of a term
Find all variants, related concepts, and occurrences of a term
No parameter schema in public metadata yet.
locate_conceptFind the key signatures, classes, and files for a concept
Find the key signatures, classes, and files for a concept
No parameter schema in public metadata yet.
describe_symbolGet the signature, docstring, and relationships for a function or class
Get the signature, docstring, and relationships for a function or class
No parameter schema in public metadata yet.
trace_conceptTrace how a concept flows through the codebase via call chains
Trace how a concept flows through the codebase via call chains
No parameter schema in public metadata yet.
list_conceptsList the top domain concepts by frequency
List the top domain concepts by frequency
No parameter schema in public metadata yet.
list_conventionsList all detected naming patterns (prefixes, suffixes, conversions)
List all detected naming patterns (prefixes, suffixes, conversions)
No parameter schema in public metadata yet.
list_entitiesList code entities (classes, functions) filtered by concept, role, or kind
List code entities (classes, functions) filtered by concept, role, or kind
No parameter schema in public metadata yet.
check_namingCheck an identifier against project conventions; suggests the canonical form
Check an identifier against project conventions; suggests the canonical form
No parameter schema in public metadata yet.
suggest_nameGenerate an identifier name that fits the project's vocabulary
Generate an identifier name that fits the project's vocabulary
No parameter schema in public metadata yet.
vocabulary_healthMeasure convention coverage, naming consistency, and cluster cohesion
Measure convention coverage, naming consistency, and cluster cohesion
No parameter schema in public metadata yet.
ontology_diffShow new, changed, or removed domain concepts since a git ref
Show new, changed, or removed domain concepts since a git ref
No parameter schema in public metadata yet.
export_domain_packExport domain knowledge as portable YAML for use in other repos
Export domain knowledge as portable YAML for use in other repos
No parameter schema in public metadata yet.
find_similar_logicFind functions with behaviorally similar implementations, ranked by embedding similarity
Find functions with behaviorally similar implementations, ranked by embedding similarity
No parameter schema in public metadata yet.
describe_logicGet the behavioral description, body text, and logic cluster membership for a function
Get the behavioral description, body text, and logic cluster membership for a function
No parameter schema in public metadata yet.
compact_contextAssemble tiered context (concepts + logic) for a symbol, optimized for LLM consumption
Assemble tiered context (concepts + logic) for a symbol, optimized for LLM consumption
No parameter schema in public metadata yet.
describe_fileOverview of a file's entities, concepts, and relationships
Overview of a file's entities, concepts, and relationships
No parameter schema in public metadata yet.
concept_mapShow which modules contain which domain concepts
Show which modules contain which domain concepts
No parameter schema in public metadata yet.
type_flowsShow dominant types and how data flows through the codebase
Show dominant types and how data flows through the codebase
No parameter schema in public metadata yet.
trace_typeTrace how a specific type propagates across files and call sites
Trace how a specific type propagates across files and call sites
No parameter schema in public metadata yet.
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ontomics
ontomics gives any coding agent instant knowledge of your codebase. One tool call instead of 19. ~20x fewer tokens.
https://github.com/user-attachments/assets/01afa8a0-1bc2-4686-94d7-965fef7610c3
Details
- Repository
- github.com/etiennechollet/ontomics
- Website
- github.com/EtienneChollet/ontomics
- Categories
- Documents & Knowledge, Search & Web Crawling
- Package
@ontomics/ontomics- Transport
- STDIO
- Registry
- MCP registry, active
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