ats-adapter

---

name: ats-adapter description: Use when writing, modifying, or debugging browser automation code for a specific job application portal — Greenhouse, Lever, Workday, or an unknown custom ATS. Triggers on: "ATS adapter", "new adapter", "write new adapter", "Workday form", "Greenhouse selector", "Lever integration", "unknown portal", "custom ATS", "LLM vision fallback", "DOM selector not found", "form automation", "apply engine", "portal scraper", "shadow DOM", "form is being filled".

ATS Adapter Skill

Use this skill when

• Writing an adapter for a new ATS platform (Greenhouse, Lever, Workday, Ashby, etc.)
• Debugging a selector or form filling error in an existing adapter
• Implementing the LLM Vision / DOM fallback mechanism for an unknown portal
• Hooking up the HITL Telegram screenshot flow for an unknown UI
• Registering a new platform in the AdapterRegistry

Do not use this skill when

• Configuring general Playwright stealth settings → use the stealth-browser skill
• Modifying the state machine or session lifecycle → use the session-lifecycle skill
• Updating only rate limit values → use the db-schema skill

---

Architecture: Adapter Pattern

All adapters are derived from the ATSAdapter abstract base class. Every adapter implements two methods:

• is_matching(page) -> bool: Platform detection via URL/DOM analysis
• fill_application(data: dict): Platform-specific form filling logic

Source Files

app/
├── automation/
│   ├── adapters/
│   │   ├── __init__.py          ← AdapterRegistry is here
│   │   ├── base.py              ← ATSAdapter ABC
│   │   ├── greenhouse.py
│   │   ├── lever.py
│   │   ├── workday.py
│   │   └── <new_platform>.py
│   ├── stealth.py               ← stealth helpers
│   └── fallback.py              ← LLM vision / HITL fallback

Base Class (app/automation/adapters/base.py)

from abc import ABC, abstractmethod
from playwright.async_api import Page
from typing import Optional

class ATSAdapter(ABC):
    def __init__(self, page: Page):
        self.page = page

    @abstractmethod
    async def is_matching(self) -> bool:
        """Determine if this page belongs to this ATS."""
        pass

    @abstractmethod
    async def fill_application(self, data: dict) -> None:
        """Form filling logic — DO NOT submit unless status is 'approved'."""
        pass

    async def take_snapshot(self, application_id: str) -> str:
        """Take a screenshot for before and after submit."""
        path = f"/tmp/snapshots/{application_id}_{int(time.time())}.png"
        await self.page.screenshot(path=path, full_page=True)
        return path

AdapterRegistry (app/automation/adapters/init.py)

from .greenhouse import GreenhouseAdapter
from .lever import LeverAdapter
from .workday import WorkdayAdapter

ADAPTER_REGISTRY = [
    GreenhouseAdapter,
    LeverAdapter,
    WorkdayAdapter,
    # Add new adapters here
]

async def detect_adapter(page) -> ATSAdapter | None:
    for AdapterClass in ADAPTER_REGISTRY:
        adapter = AdapterClass(page)
        if await adapter.is_matching():
            return adapter
    return None  # Unknown portal → fallback mechanism kicks in

---

Known Adapters

Adapter	Detection Signal	Special Notes
GreenhouseAdapter	boards.greenhouse.io in URL	Flat DOM, standard selectors
LeverAdapter	jobs.lever.co in URL	Similar to Greenhouse
WorkdayAdapter	.myworkdayjobs.com in URL	Shadow DOM, pierce/ selector required

Greenhouse Adapter (app/automation/adapters/greenhouse.py)

from playwright.async_api import Page
from .base import ATSAdapter
from ..stealth import human_type, human_click, gaussian_wait

class GreenhouseAdapter(ATSAdapter):
    async def is_matching(self) -> bool:
        return "boards.greenhouse.io" in self.page.url

    async def fill_application(self, data: dict) -> None:
        await human_type(self.page, "input#first_name", data["first_name"])
        await gaussian_wait(0.5, 0.1)
        await human_type(self.page, "input#last_name", data["last_name"])
        await gaussian_wait(0.5, 0.1)
        await human_type(self.page, "input#email", data["email"])
        await gaussian_wait(0.8, 0.2)
        await self.page.set_input_files("input[type='file']", data["cv_path"])
        await gaussian_wait(1.5, 0.3)

        # If there is a cover letter
        if data.get("cover_letter_path"):
            # In Greenhouse, the second file input is usually the cover letter
            file_inputs = await self.page.query_selector_all("input[type='file']")
            if len(file_inputs) > 1:
                await file_inputs[1].set_input_files(data["cover_letter_path"])

        # SAFETY: only submit if status is 'approved'
        if data.get("approved", False):
            snapshot_path = await self.take_snapshot(data["application_id"])
            await human_click(self.page, "input[type='submit'], button[type='submit']")
            return snapshot_path

Workday Adapter — Shadow DOM (app/automation/adapters/workday.py)

class WorkdayAdapter(ATSAdapter):
    async def is_matching(self) -> bool:
        return ".myworkdayjobs.com" in self.page.url

    async def fill_application(self, data: dict) -> None:
        # Workday shadow DOM: selector with pierce/ prefix
        await self.page.locator(
            "pierce/[data-automation-id='legalNameSection_firstName']"
        ).fill(data["first_name"])
        await gaussian_wait(0.8, 0.2)

        await self.page.locator(
            "pierce/[data-automation-id='legalNameSection_lastName']"
        ).fill(data["last_name"])

        # Workday dynamic loading — must wait for the form element at each step
        await self.page.wait_for_selector(
            "pierce/[data-automation-id='email']",
            state="attached",
            timeout=15000
        )
        await self.page.locator(
            "pierce/[data-automation-id='email']"
        ).fill(data["email"])

---

Unknown Portal Fallback Hierarchy

When detect_adapter() returns None, the sequence is:

Layer 1: Heuristic Mapping

FIELD_HEURISTICS = {
    "first_name": ["input[name*='first']", "input[id*='first']", "input[placeholder*='First']"],
    "last_name":  ["input[name*='last']",  "input[id*='last']",  "input[placeholder*='Last']"],
    "email":      ["input[type='email']",  "input[name*='email']"],
    "cv":         ["input[type='file']"],
}

async def heuristic_fill(page, data: dict) -> bool:
    for field, selectors in FIELD_HEURISTICS.items():
        for selector in selectors:
            el = await page.query_selector(selector)
            if el:
                await human_type(page, selector, data.get(field, ""))
                break
        else:
            return False  # This field was not found → Move to Layer 2
    return True

Layer 2: LLM Vision / DOM Fallback

async def llm_vision_fallback(page: Page, field_label: str) -> str | None:
    """Find the CSS selector from the screenshot with GPT-4o or Gemini."""
    screenshot_b64 = await page.screenshot(type="png", full_page=False)
    ax_tree = await page.accessibility.snapshot()

    prompt = f"""
    Find the CSS selector for the '{field_label}' field on this form page.
    ONLY return the selector string, do not write anything else.
    Example output: input[name='salary_expectation']
    """
    # call_with_fallback("dom_vision_fallback", {screenshot, ax_tree, prompt})
    # Verify and use the returned selector

Layer 3: HITL Telegram

async def hitl_fallback(page: Page, application_id: str, field_label: str):
    """If LLM failed, ask the user, save the response to memory."""
    screenshot_path = await take_snapshot(application_id)
    await send_telegram_photo(
        screenshot_path,
        caption=f"⚠️ Unknown field: *{field_label}*\nPlease send the CSS selector."
    )
    # Save the user response to interaction_logs (learned behavior)
    # This selector is used when the same site is seen again

---

Steps to Add a New Adapter

1. Create app/automation/adapters/<platform>.py, derive from ATSAdapter
2. is_matching(): Perform URL pattern check (look at the URL before the DOM — it's faster)
3. fill_application(): Fill the form with platform-specific selectors, use stealth helpers
4. Add to the ADAPTER_REGISTRY list in adapters/__init__.py
5. Perform INSERT into the platform_rate_limits table (in the migration file)
6. Write tests/automation/test_<platform>_adapter.py — is_matching and basic form fill tests with a mock page

Safety

• Only click the submit button when data["approved"] == True
• Call take_snapshot() before and after submit, save the path to interaction_logs.payload
• Do not write the encrypted_session_path content to any logs or outputs
• The first test must absolutely be done in headless=False (visible browser) mode