CodeMeridian.Indexer 1.0.0

This package has been deprecated as it is legacy and has critical bugs.

Additional Details

use 1.0.3 or higher

There is a newer version of this package available.
See the version list below for details.

dotnet tool install --global CodeMeridian.Indexer --version 1.0.0

This package contains a .NET tool you can call from the shell/command line.

dotnet new tool-manifest
                    

                            if you are setting up this repo

dotnet tool install --local CodeMeridian.Indexer --version 1.0.0

This package contains a .NET tool you can call from the shell/command line.

#tool dotnet:?package=CodeMeridian.Indexer&version=1.0.0

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

nuke :add-package CodeMeridian.Indexer --version 1.0.0

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

CodeMeridian

CodeMeridian is a persistent code knowledge graph for AI coding tools. It indexes your codebase into Neo4j and exposes that structure through MCP, so GitHub Copilot can ask precise questions before editing instead of guessing from open files.

It is built to be the deterministic context layer for large codebases: callers, dependencies, tests, documentation, hotspots, dead code, and cross-project relationships stay available across sessions.

No LLM API key required. Copilot is the AI; CodeMeridian is the knowledge engine.

Why CodeMeridian?

Without CodeMeridian	With CodeMeridian
Copilot reads files you happen to have open	Copilot queries a graph of your entire codebase
Context disappears between sessions	Knowledge persists in Neo4j
"What calls this method?" requires manual searching	`find_impact` answers from the call graph
Refactors can miss hidden callers	Blast radius is known before edits
Dead code and test gaps stay invisible	`find_unreferenced` and `find_coverage_gaps` surface them
Large context windows get filled with noise	Copilot gets the smallest useful architecture slice

What It Indexes

CodeMeridian currently supports:

C# via a Roslyn indexer
TypeScript / TSX via a ts-morph indexer
README and documentation files
Optional vector embeddings for semantic code similarity (find duplicate patterns, refactoring opportunities)

The indexer is designed as a language-agnostic pipeline: future language indexers can write into the same graph model and be queried through the same MCP tools. Embeddings are opt-in (disabled by default) and are now generated by the CodeMeridian backend, which can use local Ollama (free) or OpenAI (paid).

Quick Start

Prerequisites:

Docker Desktop
.NET 10 SDK
GitHub Copilot in VS Code
Node.js 18+ when indexing TypeScript / TSX

Start CodeMeridian:

Copy-Item .env.example .env
docker compose up -d

Index this repository:

dotnet run --project tools/Indexer -- . --clear

Or, after installing the indexer tool:

codemeridian index . --clear

Open this folder in VS Code. The MCP server is registered through .vscode/mcp.json, and Copilot can call CodeMeridian tools while you chat.

Common Questions

Ask Copilot things like:

Use CodeMeridian to give me an architectural overview.

Before changing OrderService.PlaceOrderAsync, what calls it?

Which methods have no test coverage?

Build a minimal context pack before I change OrderService.PlaceOrderAsync.

How is this TypeScript component connected to the backend?

Core Tools

Tool	What it does
`query_codebase`	Natural-language search over code structure
`get_architectural_overview`	Project map by namespace/module
`get_context_for_editing`	Compact callers/callees/interfaces context for a node
`build_minimal_context`	Bounded context pack with callers, callees, impact, tests, gaps, and likely files
`find_impact`	Backward blast-radius analysis
`find_connection`	Shortest path between two code elements
`find_unreferenced`	Dead-code candidates
`find_coverage_gaps`	Production code not called by tests
`find_similar_nodes`	Find duplicate code patterns (requires embeddings enabled)
`find_duplicate_candidates`	Review likely duplicate methods/classes with refactor-risk signals
`search_documentation`	Search indexed README/ADR/documentation content
`clear_project_knowledge`	Clear one project's indexed graph and docs before rebuilding
`clear_code_graph`	Clear all indexed code graph nodes while preserving docs

Documentation

Project Layout

src/
  Core/             Domain models
  Application/      Query services and orchestration
  Infrastructure/   Neo4j graph and knowledge storage
  McpServer/        MCP server and REST ingestion API
  Sdk/              Client library for ingestion
tools/
  Indexer/          Unified indexer CLI
  RoslynIndexer/    C# Roslyn indexer
  TsIndexer/        TypeScript / TSX indexer
docs/
  features.md
  how-it-works.md
  installation.md
  indexing.md
  publishing.md

Status

CodeMeridian is early but usable. It already indexes C# and TypeScript/TSX projects, persists the graph in Neo4j, and exposes MCP tools for Copilot. The roadmap is tracked in TODO.md.

Product	Compatible and additional computed target framework versions.
.NET	net10.0 is compatible. net10.0-android was computed. net10.0-browser was computed. net10.0-ios was computed. net10.0-maccatalyst was computed. net10.0-macos was computed. net10.0-tvos was computed. net10.0-windows was computed.

Compatible target framework(s)

Included target framework(s) (in package)

Learn more about Target Frameworks and .NET Standard.

This package has no dependencies.

Version	Downloads	Last Updated
1.0.11	4	6/10/2026
1.0.10	94	6/7/2026
1.0.9	86	6/7/2026
1.0.8	88	6/7/2026
1.0.7	97	6/6/2026
1.0.6	96	6/6/2026
1.0.5	105	6/6/2026
1.0.4	92	6/6/2026
1.0.3	96	6/5/2026
1.0.2	106	6/5/2026
1.0.1	104	6/4/2026
1.0.0	103	6/4/2026