/expect

name: expect
license: MIT
compatibility: "Claude Code 2.1.251+. Requires agent-browser >= 0.31.1 (Rust-native, no Playwright; 0.27.1 documented broken on prod pages)."
description: "Diff-aware AI browser testing — reads the git diff, maps changes to affected pages via the route map, generates a targeted test plan, and executes it via agent-browser (Rust daemon + CDP, ARIA-tree-first) with pass/fail reporting. Use when testing UI changes, verifying PRs before merge, or running regression checks on changed components."
argument-hint: "[-m <instruction>] [--target unstaged|branch|commit] [--flow <slug>] [-y]"
context: fork
# user-typed commands stay interactive; CC >= 2.1.218 backgrounds forks by default (#3093)
background: false
version: 1.1.0
author: OrchestKit
tags: [testing, browser, e2e, diff-aware, regression, visual, accessibility, ai-testing]
user-invocable: true
allowed-tools: [AskUserQuestion, Bash, Read, Write, Edit, Grep, Glob, Agent, TaskCreate, TaskUpdate, TaskList, ToolSearch, WebFetch, Monitor, PushNotification]
skills: [testing-e2e, chain-patterns, memory]
complexity: high
persuasion-type: guidance
effort: high
model: sonnet
metadata:
  category: testing
  milestone: M99
  upstream-package: agent-browser
  upstream-version-tested: "0.36.0"
triggers:
  keywords: [expect, "test my changes", "browser test", "diff test", "test what I changed", "test the UI", "visual regression", "check my changes"]
  examples:
    - "test my changes before I push"
    - "expect — run browser tests on what I changed"
    - "test the login flow after my auth refactor"
    - "run visual regression on the dashboard"
  anti-triggers: [cover, "unit test", "generate tests", verify, implement, "npm test"]
paths: [".expect/**", "**/*.test.{ts,tsx}", "agent-browser.json"]
invocation_hooks:
  - "command -v agent-browser >/dev/null 2>&1 || echo 'Warning: agent-browser not installed — run npm install -g agent-browser'"

Expect — Diff-Aware AI Browser Testing

Analyze git changes, generate targeted test plans, and execute them via AI-driven browser automation.

> **Note:** If `disableSkillShellExecution` is enabled (CC 2.1.91), the agent-browser install check won't run. Verify it's installed: `npx agent-browser --version`.

expect                              # Auto-detect changes, test affected pages
expect -m "test the checkout flow"  # Specific instruction
expect --flow login                 # Replay a saved test flow
expect --target branch              # Test all changes on current branch vs main
expect -y                           # Skip plan review, run immediately

**Core principle:** Only test what changed. Git diff drives scope — no wasted cycles on unaffected pages.

Argument Resolution

ARGS = "[-m <instruction>] [--target unstaged|branch|commit] [--flow <slug>] [-y]"

# Parse from full argument string
import re
raw = ""  # Full argument string from CC

INSTRUCTION = None
TARGET = "unstaged"  # Default: test unstaged changes
FLOW = None
SKIP_REVIEW = False

# Extract -m "instruction"
m_match = re.search(r'-m\s+["\']([^"\']+)["\']|-m\s+(\S+)', raw)
if m_match:
    INSTRUCTION = m_match.group(1) or m_match.group(2)

# Extract --target
t_match = re.search(r'--target\s+(unstaged|branch|commit)', raw)
if t_match:
    TARGET = t_match.group(1)

# Extract --flow
f_match = re.search(r'--flow\s+(\S+)', raw)
if f_match:
    FLOW = f_match.group(1)

# Extract -y
if '-y' in raw.split():
    SKIP_REVIEW = True

STEP 0: MCP Probe + Prerequisite Check

# memory is alwaysLoad in .mcp.json (CC 2.1.121+, #1541) — probe below kept as fallback for older CC:
ToolSearch(query="select:mcp__memory__search_nodes")

# Verify agent-browser is available (Rust-native, no Playwright)
Bash("command -v agent-browser || npx agent-browser --version")
# If missing: "Install agent-browser: npm i -g agent-browser"

# Load agent-browser's version-matched workflow guide (ships with the CLI).
# NOT `skills get agent-browser` — that resolves but returns only the thin
# top-level router; `core --full` is the actual 2,800+ line command reference.
Bash("agent-browser skills get core --full")

CRITICAL: Task Management

# 1. Create main task IMMEDIATELY
TaskCreate(
  subject="Expect: test changed code",
  description="Diff-aware browser testing pipeline",
  activeForm="Running diff-aware browser tests"
)

# 2. Create subtasks for each pipeline phase
TaskCreate(subject="Check fingerprint (skip if unchanged)", activeForm="Checking fingerprint")  # id=2
TaskCreate(subject="Scan git diff and classify changes", activeForm="Scanning diff")            # id=3
TaskCreate(subject="Map changes to routes/URLs", activeForm="Mapping routes")                   # id=4
TaskCreate(subject="Generate AI test plan", activeForm="Generating test plan")                   # id=5
TaskCreate(subject="Execute tests via agent-browser", activeForm="Executing browser tests")     # id=6
TaskCreate(subject="Compile test report", activeForm="Compiling report")                        # id=7

# 3. Set dependencies for sequential phases
TaskUpdate(taskId="3", addBlockedBy=["2"])  # Diff scan needs fingerprint check
TaskUpdate(taskId="4", addBlockedBy=["3"])  # Route map needs diff results
TaskUpdate(taskId="5", addBlockedBy=["4"])  # Test plan needs route map
TaskUpdate(taskId="6", addBlockedBy=["5"])  # Execution needs test plan
TaskUpdate(taskId="7", addBlockedBy=["6"])  # Report needs execution results

# 4. Update status as you progress
TaskUpdate(taskId="2", status="in_progress")  # When starting
TaskUpdate(taskId="2", status="completed")    # When done — repeat for each subtask

Pipeline Overview

Git Diff → Route Map → Fingerprint Check → Test Plan → Execute → Report

| Phase | What | Output | Reference | |-------|------|--------|-----------| | **1. Fingerprint** | SHA-256 hash of changed files | Skip if unchanged since last run | `references/fingerprint.md` | | **2. Diff Scan** | Par