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CONTRIBUTING.md

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How to contribute

We'd love to accept your patches and contributions to this project.

Before you begin

Sign our Contributor License Agreement

Contributions to this project must be accompanied by a Contributor License Agreement (CLA). You (or your employer) retain the copyright to your contribution; this simply gives us permission to use and redistribute your contributions as part of the project.

If you or your current employer have already signed the Google CLA (even if it was for a different project), you probably don't need to do it again.

Visit https://cla.developers.google.com/ to see your current agreements or to sign a new one.

Review our community guidelines

This project follows Google's Open Source Community Guidelines.

Contribution process

Code reviews

All submissions, including submissions by project members, require review. We use GitHub pull requests for this purpose. Consult GitHub Help for more information on using pull requests.

Environment

  1. Install node v20
  2. Run corepack enable pnpm to enable pnpm.

Note: We recommend using Node v20 or greater when compiling and running Genkit. Any older versions of Node may not work properly.

Quick setup

pnpm i
pnpm run setup

This will install all dependencies and build all packages.

Build it

pnpm build

This will build all packages in this repository. This is recommended the first time you check out a fresh repo or pull new revisions.

Pack it

Pack packages for testing/distribution.

Assuming you built everything previously....

pnpm pack:all

This will produce tarballs in the dist folder. Also genkit-dist.zip -- a zip of all the package tarballs.

Link it

You will need the Genkit CLI to run test apps and the Developer UI (this is done for you with pnpm run setup):

pnpm link-genkit-cli

Run it

Run a flow

In the js/testapps folder you will find some test apps using Genkit. They might contain instructions for how to run them and what setup is necessary.

Here's one that requires no setup:

cd js/testapps/flow-sample1
genkit flow:run basic "\"hello\""

Run the Developer UI

cd js/testapps/flow-sample1
genkit start

Point your browser to http://localhost:4000

Run evaluations

We'll be using the pdfQA flow for our example.

To start, let's make sure we have some context to pull from the vector store.

  1. Start the Developer UI
cd js/testapps/rag
genkit start
  1. Click on the indexPdf flow in the left nav.
  2. Input paths to pdfs you want to index. There's one checked into the directory:
"./35650.pdf"
  1. Run the evaluation
genkit eval:flow pdfQA '"What's a brief description of MapReduce?"'
  1. To see the output, look for the log line Saving EvalRun with the path to the json file.

Code it

FYI: js and genkit-tools are in two separate workspaces.

As you make changes you may want to build an test things by running test apps. You can reduce the scope of what you're building by running a specific build command:

pnpm build:genkit
pnpm build:genkit-tools

But you can also go into specific package that you changed and run

pnpm build

If you are going to be coding for a while then do

pnpm build:watch

in the package that you're editing.

Send it

Once done coding you will want to send a PR. Always do things in a separate branch (by convention name the branch your_name-feature-something).

Before sending the PR, always run:

pnpm format
pnpm build