firebase

name	firebase
description	Manage Firebase projects, Firestore, Auth users and Hosting via REST API
user-invocable	true
argument-hint	["project ID"]

/firebase

Connect to Firebase and Google Cloud APIs to manage projects, Firestore databases, Authentication users and Hosting deployments. Pure Ruby, zero gems — stdlib only (json, net/http, uri, openssl, base64, fileutils).

Structure

scripts/
├── auth.rb              # JWT-based OAuth2 + firebase_request helper (required by all scripts)
├── check_setup.rb       # Check if service account JSON exists (outputs OK or SETUP_NEEDED)
├── save_token.rb        # Copy a service account JSON file to the config directory
├── projects.rb          # List Firebase projects
├── firestore_collections.rb  # List top-level Firestore collections
├── firestore_documents.rb    # List documents in a Firestore collection
├── firestore_document.rb     # Get a single Firestore document
├── auth_users.rb        # List Firebase Auth users (requires confirmation — contains PII)
├── hosting_sites.rb     # List Hosting sites for a project
└── hosting_releases.rb  # List releases for a Hosting site

Setup (check before using)

ruby ~/.claude/skills/firebase/scripts/check_setup.rb

If the output is OK, proceed to the Flow section.

If the output is SETUP_NEEDED, guide the user step by step. Present ONE step at a time, wait for the user to confirm before moving to the next.

Step 1 — Ask the user to create a service account key:

You need a Google Cloud service account key with Firebase access.

1. Go to the Google Cloud Console > IAM & Admin > Service Accounts: https://console.cloud.google.com/iam-admin/serviceaccounts

2. Select your project (or create one).

3. Click Create Service Account. Give it a name like hitank-firebase.

4. Grant it the Editor role (or more restrictive roles: Firebase Admin, Cloud Datastore User, Firebase Hosting Admin).

5. Click on the created service account, go to Keys > Add Key > Create new key > JSON.

6. A .json file will be downloaded. Tell me the path to that file.

Step 2 — When the user provides the path to the JSON key file, save it:

ruby ~/.claude/skills/firebase/scripts/save_token.rb '/path/to/downloaded-key.json'

If the script outputs an error, the file is invalid. Ask the user to double-check and try again.

If setup is not complete, DO NOT proceed to the Flow. Complete all steps first.

Flow

The argument $ARGUMENTS may contain a Firebase project ID.

Step 1: List projects

ruby ~/.claude/skills/firebase/scripts/projects.rb

Present the projects to the user. If $ARGUMENTS matches a project ID, use that project. Otherwise ask which project to work with.

Step 2: Actions

List top-level Firestore collections (documents at root):

ruby ~/.claude/skills/firebase/scripts/firestore_collections.rb PROJECT_ID

List documents in a Firestore collection:

ruby ~/.claude/skills/firebase/scripts/firestore_documents.rb PROJECT_ID COLLECTION_NAME

Get a single Firestore document:

ruby ~/.claude/skills/firebase/scripts/firestore_document.rb PROJECT_ID COLLECTION_NAME DOCUMENT_ID

List Firebase Auth users (requires user confirmation — this returns PII):

Before running, ask: "This will list Firebase Auth users which contains personal information (emails, phone numbers). Do you want to proceed?" Only execute after a "yes".

ruby ~/.claude/skills/firebase/scripts/auth_users.rb PROJECT_ID

List Hosting sites:

ruby ~/.claude/skills/firebase/scripts/hosting_sites.rb PROJECT_ID

List Hosting releases:

ruby ~/.claude/skills/firebase/scripts/hosting_releases.rb PROJECT_ID SITE_NAME

Notes

• Pure Ruby, zero gems — stdlib only (json, net/http, uri, openssl, base64, fileutils)
• Auth via Google OAuth2 using a service account JSON key and JWT (RS256)
• Service account key file: ~/.config/firebase/service_account.json (outside the repo, never commit)
• Access token cached at ~/.config/firebase/access_token with expiry check
• The JWT is signed locally using the service account's private key, then exchanged for an access token via https://oauth2.googleapis.com/token
• Listing Auth users requires explicit user confirmation because it returns PII
• OAuth2 scope: https://www.googleapis.com/auth/cloud-platform https://www.googleapis.com/auth/firebase