AIContextBuilder MCP server

AIContextBuilder (aicb)

<!-- mcp-name: io.github.gregordadera/aicb-roslyn-mcp -->

Give coding agents a Roslyn-accurate map of your C#/.NET solution. aicb is a code intelligence server for C# and .NET: it answers questions about callers, implementations, dependency injection, tests, side effects and change impact, then packs the relevant code into compact Markdown for an LLM. It runs locally as an MCP server and CLI; a Windows desktop app adds visual context selection, analysis and editing.

The software is closed source. This public repository contains its

documentation, license and releases. It is free for individuals, education and

organizations below the license thresholds.

See it answer a code question

Ask your coding agent:

What could be affected if I change ColorMixerService? Use AICB.

Or call the same tool from a terminal:

aicb call impact_of_change --sln C:/repo/App.sln --arg symbol=ColorMixerService

Abridged output from the bundled ColorMixer.SelectionLab sample:

{
  "symbol": "ColorMixerService",
  "resolvedKind": "type",
  "directCount": 1,
  "transitiveCount": 2,
  "risk": "low",
  "productionImpactCount": 2,
  "directImpact": { "items": ["DemoCompositionRoot"] }
}

The desktop app's MCP Usage page records calls locally and separates guided refusals from suspected defects:

That answer comes from the Roslyn symbol graph, not a substring search. AICB distinguishes overloads, follows interface and override relationships, understands partial types and records DI construction paths.

Build context that fits the task

AICB does more than answer individual symbol questions. It can assemble a focused, task-specific context package for an agent instead of sending an unfiltered source dump:

Shortened. The full README is on GitHub.