cyrus-setup-linear

name	cyrus-setup-linear
description	Create a Linear OAuth application and configure Cyrus to use it — supports agent-browser automation or guided manual setup.

CRITICAL: Never use Read, Edit, or Write tools on ~/.cyrus/.env or any file inside ~/.cyrus/. Use only Bash commands (grep, printf >>, etc.) to interact with env files — secrets must never be read into the conversation context. Never scrape, extract, or read secret values from web pages — guide the user to copy them manually.

Setup Linear

Creates a Linear OAuth application and configures credentials so Cyrus can receive webhooks and respond to issues.

Step 1: Check Existing Configuration

grep -E '^LINEAR_CLIENT_ID=' ~/.cyrus/.env 2>/dev/null

If LINEAR_CLIENT_ID is already set, check if OAuth is also complete:

grep -q '"workspaces"' ~/.cyrus/config.json 2>/dev/null && echo "configured" || echo "not configured"

If both are set, inform the user:

Linear is already configured. Skipping this step. To reconfigure, remove LINEAR_CLIENT_ID, LINEAR_CLIENT_SECRET, and LINEAR_WEBHOOK_SECRET from ~/.cyrus/.env and re-run.

Skip to completion.

Step 2: Get CYRUS_BASE_URL

Read the base URL from the env file (set by setup-endpoint):

grep '^CYRUS_BASE_URL=' ~/.cyrus/.env | cut -d= -f2-

This is needed for the callback and webhook URLs.

Step 3: Create Linear OAuth App

Determine which browser automation mode to use (see orchestrator rules):

1. If claude-in-chrome MCP tools are available → use Path A-1 (claude-in-chrome)
2. If agent-browser is installed (which agent-browser) and a Chrome debug session is connected → use Path A-2 (agent-browser)
3. Otherwise → use Path B (manual)

Path A-1: claude-in-chrome Automation

Use the mcp__claude-in-chrome__* tools to navigate and interact with the user's existing Chrome browser. The user is likely already signed in to Linear.

Navigate to the Linear API settings page and proceed with form filling and credential capture using the chrome MCP tools (navigate, click, fill, screenshot, javascript_tool, etc.). Follow the same form fields and credential scraping logic as Path A-2 below, but using MCP tools instead of CLI commands.

Path A-2: agent-browser Automation

If agent-browser is connected to a Chrome debug session, automate the Linear app creation.

3a. Navigate to Linear API settings

agent-browser navigate "https://linear.app/settings/api/applications/new"

Wait for page to load. Take a screenshot to verify you're on the right page and logged in.

3b. Fill the form

agent-browser fill "input[name='name']" "<AGENT_NAME>"
agent-browser fill "input[name='developerName']" "Self-hosted"
agent-browser fill "input[name='developerUrl']" "https://github.com/ceedaragents/cyrus"

For the callback URL field:

agent-browser fill "input[name='redirectUrls']" "<CYRUS_BASE_URL>/callback"

Enable webhooks and fill webhook URL:

agent-browser fill "input[name='webhookUrl']" "<CYRUS_BASE_URL>/linear-webhook"

Check the required event types:

• Agent session events (REQUIRED)
• Inbox notifications
• Permission changes
• Issues

Click "Create".

After creation, Linear redirects to the app settings page. Do NOT screenshot credential pages or attempt to scrape secrets. Proceed to Step 4.

Path A-1: claude-in-chrome Automation

Use the mcp__claude-in-chrome__* tools to navigate and interact with the user's existing Chrome browser.

Navigate to the Linear API settings page (https://linear.app/settings/api/applications/new) and fill in the form with the same fields as Path A-2 above. Click "Create". Do NOT screenshot credential pages or attempt to scrape secrets. Proceed to Step 4.

Path B: Manual Guided Setup

Guide the user through manual creation:

Create a Linear OAuth Application

1. Go to your Linear workspace settings:
   • Click your workspace name (top-left) → Settings
   • Navigate to API in the left sidebar
   • Scroll to OAuth Applications → Click Create new
2. Fill in the form:
   • Application name: <AGENT_NAME>
   • Developer name: Your name or org
   • Developer URL: https://github.com/ceedaragents/cyrus
   • Redirect callback URLs: <CYRUS_BASE_URL>/callback
   • Webhook URL: <CYRUS_BASE_URL>/linear-webhook
   • Webhook: ✓ enabled
   • Event types: ✓ Agent session events, ✓ Inbox notifications, ✓ Permission changes, ✓ Issues
   • Public: ✗ leave disabled (this is a private self-hosted app)
3. Click Create

Proceed to Step 4.

Step 4: Collect Credentials

The agent must NOT scrape, read, or extract secrets from the page. The user copies them manually into the env file.

4a. Add credential placeholders

grep -q '^LINEAR_CLIENT_ID=' ~/.cyrus/.env || echo 'LINEAR_CLIENT_ID=' >> ~/.cyrus/.env
grep -q '^LINEAR_CLIENT_SECRET=' ~/.cyrus/.env || echo 'LINEAR_CLIENT_SECRET=' >> ~/.cyrus/.env
grep -q '^LINEAR_WEBHOOK_SECRET=' ~/.cyrus/.env || echo 'LINEAR_WEBHOOK_SECRET=' >> ~/.cyrus/.env

4b. Open env file for editing

# macOS
code --new-window ~/.cyrus/.env 2>/dev/null || open -a TextEdit ~/.cyrus/.env
# Linux
code --new-window ~/.cyrus/.env 2>/dev/null || xdg-open ~/.cyrus/.env

4c. Guide the user

Tell the user:

I've opened ~/.cyrus/.env. You need to paste three values from your Linear app settings page:

1. Client ID — copy it and paste after LINEAR_CLIENT_ID=
2. Client Secret — click the copy button next to it (it's masked with dots), paste after LINEAR_CLIENT_SECRET=
3. Webhook Signing Secret — click the copy button next to it, paste after LINEAR_WEBHOOK_SECRET=

Save and close the file when done.

4d. Verify

After the user confirms they've saved:

grep -c '^LINEAR_CLIENT_ID=.' ~/.cyrus/.env
grep -c '^LINEAR_CLIENT_SECRET=.' ~/.cyrus/.env
grep -c '^LINEAR_WEBHOOK_SECRET=.' ~/.cyrus/.env

All three must return 1 (the . after = ensures the value is not empty). If any are 0, ask the user to check the file.

Step 5: Authorize with Linear

Run the OAuth authorization flow:

cyrus self-auth-linear

This will:

1. Start a temporary OAuth callback server
2. Open the browser to Linear's authorization page
3. After the user clicks Authorize, save tokens to ~/.cyrus/config.json

Verify authorization succeeded:

cat ~/.cyrus/config.json | grep -c '"workspaces"'

If the count is 0, authorization failed. Ask the user to check their credentials and try again.

Completion

✓ Linear OAuth application created ✓ Credentials saved to ~/.cyrus/.env ✓ Workspace authorized via cyrus self-auth-linear