Mock Websites — Setup & State Injection Guide

This skill teaches setup-gen how to create initial web app state and golden patches for mock website tasks. Unlike file-based domains, mock website tasks involve HTTP state injection — there are no local files on the VM.

• Libraries: requests, json, uuid
• All 16 mocks are deployed at https://cua-gym-<name>.xlang.ai

---

0. Mock Website Registry

All mocks are publicly deployed. The URL pattern is https://cua-gym-<name>.xlang.ai where <name> is the directory name without _mock, with underscores replaced by hyphens.

Mock	Public URL	SCHEMA.md
asana_mock	https://cua-gym-asana.xlang.ai	openrlvr-mock/asana_mock/SCHEMA.md
aws_console_mock	https://cua-gym-aws-console.xlang.ai	openrlvr-mock/aws_console_mock/SCHEMA.md
discord_mock	https://cua-gym-discord.xlang.ai	openrlvr-mock/discord_mock/SCHEMA.md
docusign_mock	https://cua-gym-docusign.xlang.ai	openrlvr-mock/docusign_mock/SCHEMA.md
github_mock	https://cua-gym-github.xlang.ai	openrlvr-mock/github_mock/SCHEMA.md
gitlab_mock	https://cua-gym-gitlab.xlang.ai	openrlvr-mock/gitlab_mock/SCHEMA.md
gmail_mock	https://cua-gym-gmail.xlang.ai	openrlvr-mock/gmail_mock/SCHEMA.md
jira_mock	https://cua-gym-jira.xlang.ai	openrlvr-mock/jira_mock/SCHEMA.md
linkedin_mock	https://cua-gym-linkedin.xlang.ai	openrlvr-mock/linkedin_mock/SCHEMA.md
notion_mock	https://cua-gym-notion.xlang.ai	openrlvr-mock/notion_mock/SCHEMA.md
reddit_mock	https://cua-gym-reddit.xlang.ai	openrlvr-mock/reddit_mock/SCHEMA.md
salesforce_mock	https://cua-gym-salesforce.xlang.ai	openrlvr-mock/salesforce_mock/SCHEMA.md
slack_mock	https://cua-gym-slack.xlang.ai	openrlvr-mock/slack_mock/SCHEMA.md
trello_mock	https://cua-gym-trello.xlang.ai	openrlvr-mock/trello_mock/SCHEMA.md
twitter_mock	https://cua-gym-twitter.xlang.ai	openrlvr-mock/twitter_mock/SCHEMA.md
youtube_mock	https://cua-gym-youtube.xlang.ai	openrlvr-mock/youtube_mock/SCHEMA.md

---

1. State API

Every mock exposes identical HTTP endpoints:

POST /post?sid=<sid> — State Injection

Action	Body	Effect
set	{"action":"set", "state":{...}}	Writes current_state AND creates initial_state (if first write). Used by initial_setup.py.
set_current	{"action":"set_current", "state":{...}}	Writes ONLY current_state. Never touches initial_state. Used by golden_patch.py.
reset	{"action":"reset"}	Deletes both current and initial state files.

All actions support "merge": true to deep-merge into existing state instead of replacing.

GET /go?sid=<sid> — State Inspection

Returns:

{
  "initial_state": { ... },
  "current_state": { ... },
  "state_diff": { ... }
}

• initial_state = snapshot from first action:"set" call
• current_state = latest state (updated by UI interactions or set_current)
• state_diff = keys that changed between initial and current

GET /state?sid=<sid> — Raw State Read

Returns {stored_state, has_custom_state, sid}.

POST /upload?sid=<sid> — File Upload

Upload files (attachments, images, documents) to the mock server. Files are stored per-session and served via /files/.

Request: multipart/form-data with one or more file fields.

Response:

{
  "success": true,
  "files": [
    {
      "original_name": "report.pdf",
      "stored_name": "a1b2c3d4_report.pdf",
      "size": 12345,
      "content_type": "application/pdf",
      "url": "/files/<sid>/a1b2c3d4_report.pdf"
    }
  ]
}

Usage in initial_setup.py — upload a file and reference its URL in state:

import requests

# Upload a file
with open('/path/to/attachment.pdf', 'rb') as f:
    resp = requests.post(
        f'{BASE_URL}/upload?sid={sid}',
        files={'file': ('attachment.pdf', f, 'application/pdf')},
        timeout=30
    )
uploaded = resp.json()['files'][0]
file_url = uploaded['url']  # e.g., /files/<sid>/a1b2c3d4_attachment.pdf

# Reference it in state injection
state['messages']['general'].append({
    'messageId': 'msg_1',
    'content': 'Here is the report',
    'attachments': [{'name': 'attachment.pdf', 'url': file_url, 'size': uploaded['size']}],
    # ... other fields
})

GET /files/<sid>/<filename> — Serve Uploaded Files

Returns the uploaded file with appropriate Content-Type header. Files are served with Content-Disposition: attachment.

---

2. Session ID (sid) Pattern

The sid links initial_setup.py, golden_patch.py, and reward.py to the same state.

Flow:

1. initial_setup.py generates a UUID sid → writes to /tmp/task_web_sid on the VM
2. initial_setup.py POSTs action:"set" with the sid → creates both initial and current state
3. golden_patch.py reads sid from /tmp/task_web_sid → POSTs action:"set_current" → updates ONLY current state
4. reward.py reads sid from /tmp/task_web_sid → GETs /go?sid=<sid> → compares initial vs current

# Generate and persist sid (initial_setup.py)
import uuid
sid = str(uuid.uuid4())
with open('/tmp/task_web_sid', 'w') as f:
    f.write(sid)

# Read sid (golden_patch.py and reward.py)
with open('/tmp/task_web_sid') as f:
    sid = f.read().strip()

---

3. State Schemas

Each mock has a schema file documenting the full state shape, default IDs, and observable state changes. Schemas are stored locally in this skill directory.

MANDATORY: Always read the schema before writing state injection code. The schema tells you:

• Required top-level keys (e.g., currentUser, channels, messages for slack)
• Object shapes for each entity type
• Default IDs for users, channels, projects, etc.
• Which state fields change when the user performs specific actions

To load the schema for a mock (do this in Step 0, immediately after reading this SKILL.md):

Read: .claude/skills/mock_websites/schemas/<mock_name>.md

Example — for a Slack task:

Read: .claude/skills/mock_websites/schemas/slack_mock.md

For multi-mock tasks, read ALL schemas for every mock listed in task_config.json's domains array.

Available schemas: asana_mock, aws_console_mock, discord_mock, docusign_mock, github_mock, gitlab_mock, gmail_mock, jira_mock, linkedin_mock, notion_mock, reddit_mock, salesforce_mock, slack_mock, trello_mock, twitter_mock, youtube_mock.

If no schema file exists for a mock, inspect the mock's default state via GET /go?sid=nonexistent to discover the state shape (it returns default data when no custom state is set).

---

4. initial_setup.py Template

"""
Initial Setup: <task_description>
Task ID: <task_id>
Domain: mock_websites
Mock: <mock_name>
"""
import json
import os
import shlex
import subprocess
import time
import uuid

import requests

# --- Config ---
BASE_URL = 'https://cua-gym-<name>.xlang.ai'  # e.g., cua-gym-slack.xlang.ai
sid = str(uuid.uuid4())

# Persist sid for golden_patch.py and reward.py
with open('/tmp/task_web_sid', 'w') as f:
    f.write(sid)

# --- Build initial state ---
# Consult SCHEMA.md for the full state shape.
# Include ALL required top-level keys. Missing keys → blank UI or crash.
state = {
    # ... full state matching SCHEMA.md ...
}

# --- Inject state ---
resp = requests.post(
    f'{BASE_URL}/post?sid={sid}',
    json={'action': 'set', 'state': state},
    timeout=30
)
assert resp.status_code == 200, f'State injection failed: {resp.text}'
print(f'State injected: sid={sid}')

# --- Verify ---
go = requests.get(f'{BASE_URL}/go?sid={sid}', timeout=10).json()
assert go['initial_state'] is not None, 'initial_state is None after injection'
print('Verified: initial_state and current_state are set')

# --- Launch browser ---
def launch_gui(command, delay_sec=1.0):
    env = os.environ.copy()
    env['DISPLAY'] = ':0'
    subprocess.Popen(
        shlex.split(command),
        stdout=subprocess.DEVNULL,
        stderr=subprocess.DEVNULL,
        env=env,
    )
    time.sleep(delay_sec)

launch_gui(f'google-chrome "{BASE_URL}/?sid={sid}"', delay_sec=2.0)
print(f'GUI_READY: launched browser at {BASE_URL}/?sid={sid}')

---

5. golden_patch.py Template

CRITICAL: Always use action:"set_current". NEVER use action:"set" in golden_patch.py.

Using action:"set" would overwrite initial_state, making state_diff empty and breaking reward evaluation entirely.

"""
Golden Patch: <task_description>
Task ID: <task_id>
Domain: mock_websites
Mock: <mock_name>
Changes: <brief list of what this patch does>
"""
import copy
import json

import requests

# --- Config ---
BASE_URL = 'https://cua-gym-<name>.xlang.ai'

# Read sid from initial_setup.py
with open('/tmp/task_web_sid') as f:
    sid = f.read().strip()

# --- Fetch current initial state ---
go = requests.get(f'{BASE_URL}/go?sid={sid}', timeout=10).json()
state = copy.deepcopy(go['initial_state'])

# --- Apply ONLY the minimal changes the task requires ---
# Example: send a message in #general
# state['messages']['general'].append({
#     'messageId': 'msg_new_1',
#     'senderId': 'user_1',
#     'content': 'Hello world!',
#     'timestamp': '2024-06-15T14:30:00Z',
#     'threadId': None,
#     'reactions': [],
#     'attachments': [],
#     'isEdited': False
# })

# --- Write ONLY current_state (preserve initial_state) ---
resp = requests.post(
    f'{BASE_URL}/post?sid={sid}',
    json={'action': 'set_current', 'state': state},
    timeout=30
)
assert resp.status_code == 200, f'set_current failed: {resp.text}'
print(f'Golden state applied via set_current: sid={sid}')

# --- Verify diff exists ---
go2 = requests.get(f'{BASE_URL}/go?sid={sid}', timeout=10).json()
assert go2['state_diff'], 'state_diff is empty — golden state matches initial (no changes applied)'
print(f'Verified: state_diff is non-empty')

---

6. Multi-Mock Tasks

When task_config.json contains a domains list with multiple mocks:

{
  "domains": ["slack_mock", "notion_mock"],
  "task_instruction": "Copy the meeting notes from Slack #general to a new Notion page"
}

Use the same sid across all mocks:

# initial_setup.py — inject into ALL listed mocks
sid = str(uuid.uuid4())
with open('/tmp/task_web_sid', 'w') as f:
    f.write(sid)

mocks = {
    'slack_mock': 'https://cua-gym-slack.xlang.ai',
    'notion_mock': 'https://cua-gym-notion.xlang.ai',
}

for name, url in mocks.items():
    state = build_state_for(name)  # mock-specific state
    resp = requests.post(f'{url}/post?sid={sid}', json={'action': 'set', 'state': state}, timeout=30)
    assert resp.status_code == 200

# Launch browser with primary mock
launch_gui(f'google-chrome "{mocks["slack_mock"]}/?sid={sid}"', delay_sec=2.0)

Golden patch similarly uses set_current on each mock that should change.

---

7. Sanity Check (for setup-gen Step 7)

Instead of ls /home/user/, use curl to verify state:

python3 scripts/env_cli.py -c "<workdir>/env_config_initial.json" execute \
  "sid=\$(cat /tmp/task_web_sid); curl -s 'https://cua-gym-slack.xlang.ai/go?sid='\$sid | python3 -m json.tool | head -60"

---

8. Bitter Lessons

1. action:"set" in golden_patch.py is the #1 bug. It overwrites initial_state, making state_diff empty. Reward scripts that compare initial vs current will always see 0 diff → reward = 0. ALWAYS use action:"set_current".

2. Missing state keys cause blank pages. If you inject {"channels": [...]} without currentUser, users, messages, etc., the UI renders empty or crashes. Always provide ALL required top-level keys from SCHEMA.md.

3. Array keys are replaced, not merged. deepMerge treats arrays as atomic values. If you POST {"messages": {"general": [msg1]}} with merge: true, it replaces the entire general array. To add a message, fetch current state first, append, then write back.

4. sid must be alphanumeric + hyphens + underscores. The server sanitizes sid with [^a-zA-Z0-9_-]. UUIDs work perfectly. Do not use special characters.

5. State is NOT persisted in the browser. The browser fetches state from the server on page load via ?sid=xxx. If you inject state after the browser loads, the user must refresh. Always inject state BEFORE launching the browser.

6. /go without sid returns default state. Always include ?sid=<sid> in all API calls. Missing sid returns the app's built-in default data, not your injected state.

7. Timestamps should be ISO 8601. Most mocks expect "2024-06-15T14:30:00Z" format. Using Unix timestamps or other formats may cause rendering issues.

8. IDs must be unique within their collection. When adding new messages, channels, etc., generate unique IDs (e.g., msg_new_1, ch_custom_1). Duplicate IDs cause silent data corruption.

9. golden_patch should copy initial_state and apply minimal changes. Don't build golden state from scratch — start from go['initial_state'], deep-copy it, and modify only what the task requires. This ensures the state_diff accurately reflects task completion.

10. HTTPS is required. All mocks are served over HTTPS at cua-gym-*.xlang.ai. HTTP will not work.