Assert_ DSL v0 with renaming v0 protocol

Author: SentienceDEV

examples/agent_runtime_verification.py

@@ -5,7 +5,7 @@
 The AgentRuntime provides assertion predicates to verify browser state during execution.
 
 Key features:
-- BrowserBackendV0 protocol: Framework-agnostic browser integration
+- BrowserBackend protocol: Framework-agnostic browser integration
 - Predicate helpers: url_matches, url_contains, exists, not_exists, element_count
 - Combinators: all_of, any_of for complex conditions
 - Task completion: assert_done() for goal verification
@@ -44,7 +44,7 @@ async def main():
         page = await browser.new_page()
 
         # 3. Create AgentRuntime using from_sentience_browser factory
-        # This wraps the browser/page into the new BrowserBackendV0 architecture
+        # This wraps the browser/page into the new BrowserBackend architecture
         runtime = await AgentRuntime.from_sentience_browser(
             browser=browser,
             page=page,

examples/browser-use/agent_runtime_browser_use.py

@@ -1,12 +1,12 @@
 """
 Example: Agent Runtime with browser-use Integration
 
-Demonstrates how to use AgentRuntime with browser-use library via BrowserBackendV0 protocol.
+Demonstrates how to use AgentRuntime with browser-use library via BrowserBackend protocol.
 This pattern enables framework-agnostic browser integration for agent verification loops.
 
 Key features:
 - BrowserUseAdapter: Wraps browser-use BrowserSession into CDPBackendV0
-- BrowserBackendV0 protocol: Minimal interface for browser operations
+- BrowserBackend protocol: Minimal interface for browser operations
 - Direct AgentRuntime construction: No need for from_sentience_browser factory
 
 Requirements:
@@ -58,7 +58,7 @@ async def main():
     await session.start()
 
     try:
-        # 3. Create BrowserBackendV0 using BrowserUseAdapter
+        # 3. Create BrowserBackend using BrowserUseAdapter
         # This wraps the browser-use session into the standard backend protocol
         adapter = BrowserUseAdapter(session)
         backend = await adapter.create_backend()

sentience/__init__.py

@@ -19,7 +19,7 @@
 # Backend-agnostic actions (aliased to avoid conflict with existing actions)
 # Browser backends (for browser-use integration)
 from .backends import (
-    BrowserBackendV0,
+    BrowserBackend,
     BrowserUseAdapter,
     BrowserUseCDPTransport,
     CachedSnapshot,
@@ -132,7 +132,7 @@
     "verify_extension_version",
     "verify_extension_version_async",
     # Browser backends (for browser-use integration)
-    "BrowserBackendV0",
+    "BrowserBackend",
     "CDPTransport",
     "CDPBackendV0",
     "PlaywrightBackend",

sentience/agent_runtime.py

@@ -2,7 +2,7 @@
 Agent runtime for verification loop support.
 
 This module provides a thin runtime wrapper that combines:
-1. Browser session management (via BrowserBackendV0 protocol)
+1. Browser session management (via BrowserBackend protocol)
 2. Snapshot/query helpers
 3. Tracer for event emission
 4. Assertion/verification methods
@@ -72,7 +72,7 @@
 if TYPE_CHECKING:
     from playwright.async_api import Page
 
-    from .backends.protocol_v0 import BrowserBackendV0
+    from .backends.protocol import BrowserBackend
     from .browser import AsyncSentienceBrowser
     from .tracing import Tracer
 
@@ -90,7 +90,7 @@ class AgentRuntime:
     to the tracer for Studio timeline display.
 
     Attributes:
-        backend: BrowserBackendV0 instance for browser operations
+        backend: BrowserBackend instance for browser operations
         tracer: Tracer for event emission
         step_id: Current step identifier
         step_index: Current step index (0-based)
@@ -99,16 +99,16 @@ class AgentRuntime:
 
     def __init__(
         self,
-        backend: BrowserBackendV0,
+        backend: BrowserBackend,
         tracer: Tracer,
         snapshot_options: SnapshotOptions | None = None,
         sentience_api_key: str | None = None,
     ):
         """
-        Initialize agent runtime with any BrowserBackendV0-compatible browser.
+        Initialize agent runtime with any BrowserBackend-compatible browser.
 
         Args:
-            backend: Any browser implementing BrowserBackendV0 protocol.
+            backend: Any browser implementing BrowserBackend protocol.
                      Examples:
                      - CDPBackendV0 (for browser-use via BrowserUseAdapter)
                      - PlaywrightBackend (future, for direct Playwright)
@@ -157,7 +157,7 @@ async def from_sentience_browser(
         Create AgentRuntime from AsyncSentienceBrowser (backward compatibility).
 
         This factory method wraps an AsyncSentienceBrowser + Page combination
-        into the new BrowserBackendV0-based AgentRuntime.
+        into the new BrowserBackend-based AgentRuntime.
 
         Args:
             browser: AsyncSentienceBrowser instance

sentience/asserts/__init__.py

@@ -0,0 +1,70 @@
+"""
+Assertion DSL for Sentience SDK.
+
+This module provides a Playwright/Cypress-like assertion API for verifying
+browser state in agent verification loops.
+
+Main exports:
+- E: Element query builder (filters elements by role, text, href, etc.)
+- expect: Expectation builder (creates predicates from queries)
+- in_dominant_list: Query over dominant group elements (ordinal access)
+
+Example usage:
+    from sentience.asserts import E, expect, in_dominant_list
+
+    # Basic presence assertions
+    runtime.assert_(
+        expect(E(role="button", text_contains="Save")).to_exist(),
+        label="save_button_visible"
+    )
+
+    # Visibility assertions
+    runtime.assert_(
+        expect(E(text_contains="Checkout")).to_be_visible(),
+        label="checkout_visible"
+    )
+
+    # Global text assertions
+    runtime.assert_(
+        expect.text_present("Welcome back"),
+        label="user_logged_in"
+    )
+    runtime.assert_(
+        expect.no_text("Error"),
+        label="no_error_message"
+    )
+
+    # Ordinal assertions on dominant group
+    runtime.assert_(
+        expect(in_dominant_list().nth(0)).to_have_text_contains("Show HN"),
+        label="first_item_is_show_hn"
+    )
+
+    # Task completion
+    runtime.assert_done(
+        expect.text_present("Order confirmed"),
+        label="checkout_complete"
+    )
+
+The DSL compiles to existing Predicate functions, so it works seamlessly
+with AgentRuntime.assert_() and assert_done().
+"""
+
+from .expect import EventuallyConfig, EventuallyWrapper, ExpectBuilder, expect, with_eventually
+from .query import E, ElementQuery, ListQuery, MultiQuery, in_dominant_list
+
+__all__ = [
+    # Query builders
+    "E",
+    "ElementQuery",
+    "ListQuery",
+    "MultiQuery",
+    "in_dominant_list",
+    # Expectation builders
+    "expect",
+    "ExpectBuilder",
+    # Eventually helpers
+    "with_eventually",
+    "EventuallyWrapper",
+    "EventuallyConfig",
+]