npx claudepluginhub sunrain520/spec-firstThis skill uses the workspace's default tool permissions.
Run end-to-end browser tests on pages affected by a PR or branch changes using the `agent-browser` CLI.
Runs end-to-end browser tests on pages affected by current PR or branch using agent-browser CLI. Maps changed files to routes via git diff or gh pr view.
Runs end-to-end browser tests with agent-browser on pages changed by PR or branch. Uses git diffs/gh PR files to map to routes for targeted local testing.
Drives real browser to QA web UI changes: auto-starts dev server, navigates, snapshots, interacts, verifies behavior, captures evidence using agent-browser or Playwright.
Share bugs, ideas, or general feedback.
Run end-to-end browser tests on pages affected by a PR or branch changes using the agent-browser CLI.
agent-browser Only For Browser AutomationThis workflow uses the agent-browser CLI exclusively. Do not use any alternative browser automation system, browser MCP integration, or built-in browser-control tool. If the platform offers multiple ways to control a browser, always choose agent-browser.
Use agent-browser for: opening pages, clicking elements, filling forms, taking screenshots, and scraping rendered content.
Platform-specific hints:
mcp__claude-in-chrome__*).bin/dev, rails server, npm run dev)agent-browser CLI installed (see Setup below)Check whether agent-browser is installed:
command -v agent-browser >/dev/null 2>&1 && echo "Installed" || echo "NOT INSTALLED"
If not installed, inform the user: "agent-browser is not installed. Run /spec:mcp-setup in Claude or $spec-mcp-setup in Codex to install required dependencies." Then stop — this skill cannot function without agent-browser.
After setup, use agent-browser skills get core when deeper upstream usage or troubleshooting guidance is needed.
Before starting, verify agent-browser is available:
command -v agent-browser >/dev/null 2>&1 && echo "Ready" || echo "NOT INSTALLED"
If not installed, inform the user: "agent-browser is not installed. Run /spec:mcp-setup in Claude or $spec-mcp-setup in Codex to install required dependencies." Then stop.
Pipeline mode (mode:pipeline): Skip this step entirely. Default to headless — no question, no blocking. Proceed directly to step 3.
Manual mode: Ask the user whether to run headed or headless using the platform's blocking question tool: AskUserQuestion in Claude Code (call ToolSearch with select:AskUserQuestion first if its schema isn't loaded) or request_user_input in Codex. Fall back to presenting options in chat only when no blocking tool exists in the harness or the call errors (e.g., Codex edit modes) — not because a schema load is required. Never silently skip the question:
Do you want to watch the browser tests run?
1. Headed (watch) - Opens visible browser window so you can see tests run
2. Headless (faster) - Runs in background, faster but invisible
Store the choice and use the --headed flag when the user selects option 1.
If PR number provided:
gh pr view [number] --json files -q '.files[].path'
If 'current' or empty:
git diff --name-only main...HEAD
If branch name provided:
git diff --name-only main...[branch]
Map changed files to testable routes:
| File Pattern | Route(s) |
|---|---|
app/views/users/* | /users, /users/:id, /users/new |
app/controllers/settings_controller.rb | /settings |
app/javascript/controllers/*_controller.js | Pages using that Stimulus controller |
app/components/*_component.rb | Pages rendering that component |
app/views/layouts/* | All pages (test homepage at minimum) |
app/assets/stylesheets/* | Visual regression on key pages |
app/helpers/*_helper.rb | Pages using that helper |
src/app/* (Next.js) | Corresponding routes |
src/components/* | Pages using those components |
Build a list of URLs to test based on the mapping.
Pipeline mode only (mode:pipeline): When invoked from LFG or another automated pipeline, always find a port that is actually free — never assume 3000 is available, as multiple agents may be running in parallel on the same machine.
Manual mode (no mode:pipeline): Use the preferred port as-is. Do not scan for alternatives — the user controls their own server.
Determine the preferred port using this priority:
--port 5000, use that directly (skip free-port scan)AGENTS.md, CLAUDE.md, or other instruction files for port references--port flags.env, .env.local, .env.development for PORT=3000In pipeline mode, verify the preferred port is free and scan upward if not. In manual mode, use the preferred port directly.
# Step 1: Determine preferred port
PORT="${EXPLICIT_PORT:-}"
if [ -z "$PORT" ]; then
PORT=$(grep -Eio '(port\s*[:=]\s*|localhost:)([0-9]{4,5})' AGENTS.md 2>/dev/null | grep -Eo '[0-9]{4,5}' | head -1)
fi
if [ -z "$PORT" ]; then
PORT=$(grep -Eio '(port\s*[:=]\s*|localhost:)([0-9]{4,5})' CLAUDE.md 2>/dev/null | grep -Eo '[0-9]{4,5}' | head -1)
fi
if [ -z "$PORT" ]; then
PORT=$(grep -Eo '\-\-port[= ]+[0-9]{4,5}' package.json 2>/dev/null | grep -Eo '[0-9]{4,5}' | head -1)
fi
if [ -z "$PORT" ]; then
PORT=$(grep -h '^PORT=' .env .env.local .env.development 2>/dev/null | tail -1 | cut -d= -f2)
fi
PORT="${PORT:-3000}"
# Step 2 (pipeline mode only): scan for a free port
if [ "${PIPELINE_MODE}" = "1" ]; then
find_free_port() {
local p=$1
while lsof -i ":$p" -sTCP:LISTEN -t >/dev/null 2>&1; do
p=$((p + 1))
done
echo $p
}
PORT=$(find_free_port "$PORT")
fi
echo "Using dev server port: $PORT"
Set PIPELINE_MODE=1 in your shell when the argument mode:pipeline is present.
Pipeline mode only: If no server is already listening on $PORT, start one automatically in the background. In manual mode, inform the user and stop.
if lsof -i ":${PORT}" -sTCP:LISTEN -t >/dev/null 2>&1; then
echo "Server already running on port ${PORT}"
else
if [ "${PIPELINE_MODE}" = "1" ]; then
# Auto-start in pipeline — pick the right command for this project
echo "Starting dev server on port ${PORT}..."
if [ -f "bin/dev" ]; then
PORT=${PORT} bin/dev > /tmp/dev-server-${PORT}.log 2>&1 &
elif [ -f "bin/rails" ]; then
bin/rails server -p ${PORT} > /tmp/dev-server-${PORT}.log 2>&1 &
elif [ -f "package.json" ]; then
PORT=${PORT} npm run dev > /tmp/dev-server-${PORT}.log 2>&1 &
fi
# Wait up to 30 seconds for server to become ready
for i in $(seq 1 30); do
lsof -i ":${PORT}" -sTCP:LISTEN -t >/dev/null 2>&1 && break
sleep 1
done
if ! lsof -i ":${PORT}" -sTCP:LISTEN -t >/dev/null 2>&1; then
echo "Server did not start in 30s. Last output:"
tail -20 /tmp/dev-server-${PORT}.log 2>/dev/null
exit 1
fi
else
# Manual mode — ask the user to start the server
echo "Server not running on port ${PORT}"
echo ""
echo "Please start your development server:"
echo " Rails: bin/dev or rails server -p ${PORT}"
echo " Node/Next.js: npm run dev"
echo " Custom port: run this skill again with --port <your-port>"
exit 0
fi
fi
agent-browser open http://localhost:${PORT}
agent-browser snapshot -i
For each affected route:
Navigate and capture snapshot:
agent-browser open "http://localhost:${PORT}/[route]"
agent-browser snapshot -i
For headed mode:
agent-browser --headed open "http://localhost:${PORT}/[route]"
agent-browser --headed snapshot -i
Verify key elements:
agent-browser snapshot -i to get interactive elements with refsTest critical interactions:
agent-browser click @e1
agent-browser snapshot -i
Take screenshots:
agent-browser screenshot page-name.png
agent-browser screenshot --full page-name-full.png
Pause for human input when testing touches flows that require external interaction:
| Flow Type | What to Ask |
|---|---|
| OAuth | "Please sign in with [provider] and confirm it works" |
| "Check your inbox for the test email and confirm receipt" | |
| Payments | "Complete a test purchase in sandbox mode" |
| SMS | "Verify you received the SMS code" |
| External APIs | "Confirm the [service] integration is working" |
Ask the user (using the platform's question tool, or present numbered options and wait):
Human Verification Needed
This test touches [flow type]. Please:
1. [Action to take]
2. [What to verify]
Did it work correctly?
1. Yes - continue testing
2. No - describe the issue
When a test fails:
Document the failure:
agent-browser screenshot error.pngAsk the user how to proceed:
Test Failed: [route]
Issue: [description]
Console errors: [if any]
How to proceed?
1. Fix now - debug and fix the failing test
2. Skip - continue testing other pages
If "Fix now": investigate, propose a fix, apply, re-run the failing test
If "Skip": log as skipped, continue
After all tests complete, present a summary:
## Browser Test Results
**Test Scope:** PR #[number] / [branch name]
**Server:** http://localhost:${PORT}
### Pages Tested: [count]
| Route | Status | Notes |
|-------|--------|-------|
| `/users` | Pass | |
| `/settings` | Pass | |
| `/dashboard` | Fail | Console error: [msg] |
| `/checkout` | Skip | Requires payment credentials |
### Console Errors: [count]
- [List any errors found]
### Human Verifications: [count]
- OAuth flow: Confirmed
- Email delivery: Confirmed
### Failures: [count]
- `/dashboard` - [issue description]
### Result: [PASS / FAIL / PARTIAL]
# Test current branch changes (auto-detects port)
/test-browser
# Test specific PR
/test-browser 847
# Test specific branch
/test-browser feature/new-dashboard
# Test on a specific port
/test-browser --port 5000
Run agent-browser --help for all commands.
Key commands:
# Navigation
agent-browser open <url> # Navigate to URL
agent-browser back # Go back
agent-browser close # Close browser
# Snapshots (get element refs)
agent-browser snapshot -i # Interactive elements with refs (@e1, @e2, etc.)
agent-browser snapshot -i --json # JSON output
# Interactions (use refs from snapshot)
agent-browser click @e1 # Click element
agent-browser fill @e1 "text" # Fill input
agent-browser type @e1 "text" # Type without clearing
agent-browser press Enter # Press key
# Screenshots
agent-browser screenshot out.png # Viewport screenshot
agent-browser screenshot --full out.png # Full page screenshot
# Headed mode (visible browser)
agent-browser --headed open <url> # Open with visible browser
agent-browser --headed click @e1 # Click in visible browser
# Wait
agent-browser wait @e1 # Wait for element
agent-browser wait 2000 # Wait milliseconds