DiffCI

io.github.adityankale190895Published by GitHub account adityankale190895v0.2.9Updated Oct 24, 2026

Change-aware CI validation and affected-test guidance for coding agents.

VerifiedStreamable HTTPWeb executableDeveloper ToolsSecurity & Monitoring

Overview

AI-generated overview

DiffCI gives coding agents change-aware CI validation: it inspects a Git checkout, selects the tests affected by a change, and runs or reports them.

What you can do
DiffCI analyzes staged, unstaged, and untracked changes in a Git checkout, determines the minimum executable test verification, and runs it, falling back to the full test command when it cannot prove a narrower selection. It exposes a stateless read-only HTTPS endpoint for validation guidance and a stdio server for inspecting the local checkout or running tests. Commands include verify, check, observe, pilot-packet, init, validate-specs, and verify-savings, with JSON receipts covering selection counts, command results, and tree identities.
When to use it
Use it when a coding agent needs to verify that a change passes the relevant tests before continuing, or when a team wants to measure full versus selected test runtime for CI savings. It is also useful for generating a non-blocking observation workflow or a blocking verification gate in GitHub Actions.
Requirements
Node.js 22.5+ and Git for the local CLI and stdio server; the remote endpoint is HTTPS at diffci.com/mcp. The CLI runs in a Git repository checkout and may need a clean checkout with both compared commits available. Sending reports to the hosted service requires an explicitly configured endpoint and token.
Before you install
The check and verify commands run tests in the checkout and may write generated files. The GitHub Action uploads a GitHub artifact by default, and sending to DiffCI's hosted service requires an explicitly configured endpoint and token. A REFUSED or ERROR status is not a successful analysis even when the command exits successfully. Reported savings are modeled or sandbox measurements, not production forecasts.

Installation

In SourceWeft

  1. Open DiffCI in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.adityankale190895%2Fdiffci/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "diffci": {
      "type": "http",
      "url": "https://diffci.com/mcp"
    }
  }
}

README

This repository has no README.

Tools

3

diffci_validation_plan

Create a local DiffCI validation plan

Plan change-aware CI validation, affected-test selection, test impact analysis, or GitHub Actions workflow checks. Returns a safe local DiffCI command without accessing the checkout or executing it.

Parametersrepoactionplatform

diffci_interpret_report

Interpret a DiffCI observation report

Validate and summarize a DiffCI observation report, including selective or full mode, affected-test counts, fallbacks, non-interference evidence, and the conservative next action.

Parametersreportrequired

diffci_verify_workflow_text

Check a GitHub Actions workflow for DiffCI isolation

Perform a stateless preliminary safety check of GitHub Actions YAML: dedicated observer job, continue-on-error, dependency isolation, read-only permissions, and immutable DiffCI references.

Parametersworkflowrequired

Version history

2
  1. v0.2.9LatestSep 25, 2026
  2. v0.2.4Sep 22, 2026

Score

75% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • License10 pts

    Declare a license in the repository or the registry entry.