Merge pull request #221 from Predicate-Labs/browser_use_plugin

browser use integration plugin

Author: rcholic

CHANGELOG.md

@@ -5,6 +5,35 @@ All notable changes to the Sentience Python SDK will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### 2026-02-13
+
+#### Expanded deterministic verifications (adaptive resnapshotting)
+
+When you use `.eventually()` for deterministic checks, you can now **automatically increase the snapshot element limit across retries**. This helps on long / virtualized pages where a small snapshot limit can miss the target element, causing a false failure.
+
+- **AgentRuntime verifications**: `AssertionHandle.eventually(..., snapshot_limit_growth=...)`
+- **Expect-style verifications**: `with_eventually(..., snapshot_limit_growth=...)`
+- **Commit**: `59125ce19001c457336dccbb3c9463560bd00245`
+
+**Example**
+
+```python
+from predicate.verification import exists
+
+# Grow snapshot limit on each retry until the element appears.
+await dbg.check(exists("text~'Checkout'"), label="checkout_visible", required=True).eventually(
+    timeout_s=12,
+    snapshot_limit_growth={
+        "start_limit": 60,
+        "step": 40,
+        "max_limit": 220,
+        "apply_on": "only_on_fail",  # default; or "all"
+    },
+)
+```
+
 ## [0.12.0] - 2025-12-26
 
 ### Added

predicate/backends/__init__.py

@@ -97,7 +97,13 @@
 )
 from .playwright_backend import PlaywrightBackend
 from .protocol import BrowserBackend, LayoutMetrics, ViewportInfo
-from .sentience_context import SentienceContext, SentienceContextState, TopElementSelector
+from .sentience_context import (
+    PredicateContext,
+    PredicateContextState,
+    SentienceContext,
+    SentienceContextState,
+    TopElementSelector,
+)
 from .snapshot import CachedSnapshot, snapshot
 
 __all__ = [
@@ -117,6 +123,9 @@
     # SentienceContext (Token-Slasher Context Middleware)
     "SentienceContext",
     "SentienceContextState",
+    # PredicateContext (rebrand alias)
+    "PredicateContext",
+    "PredicateContextState",
     "TopElementSelector",
     # Backend-agnostic functions
     "snapshot",

predicate/backends/sentience_context.py

@@ -6,9 +6,9 @@
 
 Example usage:
     from browser_use import Agent
-    from predicate.backends import SentienceContext
+    from predicate.backends import PredicateContext
 
-    ctx = SentienceContext(show_overlay=True)
+    ctx = PredicateContext(show_overlay=True)
     state = await ctx.build(agent.browser_session, goal="Click the first Show HN post")
     if state:
         agent.add_context(state.prompt_block)  # or however browser-use injects state
@@ -469,3 +469,12 @@ def _compress_href(self, href: str | None) -> str:
             pass
 
         return "item"
+
+
+# ---------------------------------------------------------------------------
+# Predicate-named counterparts (canonical moving forward).
+# Keep Sentience* names for backward compatibility.
+# ---------------------------------------------------------------------------
+
+PredicateContext = SentienceContext
+PredicateContextState = SentienceContextState

predicate/integrations/browser_use/__init__.py

@@ -0,0 +1,47 @@
+"""
+Browser Use integration (Predicate plugin).
+
+This package provides a low-friction integration layer that lets browser-use users
+attach Predicate's deterministic verification (AgentRuntime / PredicateDebugger)
+to existing Browser Use agent loops via lifecycle hooks and optional tools.
+
+Public surface is intentionally small and may evolve.
+"""
+
+from __future__ import annotations
+
+from typing import TYPE_CHECKING, Any
+
+if TYPE_CHECKING:  # pragma: no cover
+    from .plugin import (
+        PredicateBrowserUsePlugin,
+        PredicateBrowserUsePluginConfig,
+        PredicateBrowserUseVerificationError,
+        StepCheckSpec,
+    )
+
+__all__ = [
+    "PredicateBrowserUsePlugin",
+    "PredicateBrowserUsePluginConfig",
+    "PredicateBrowserUseVerificationError",
+    "StepCheckSpec",
+]
+
+
+def __getattr__(name: str) -> Any:  # pragma: no cover
+    if name in __all__:
+        from .plugin import (  # local import keeps linting/packaging robust
+            PredicateBrowserUsePlugin,
+            PredicateBrowserUsePluginConfig,
+            PredicateBrowserUseVerificationError,
+            StepCheckSpec,
+        )
+
+        return {
+            "PredicateBrowserUsePlugin": PredicateBrowserUsePlugin,
+            "PredicateBrowserUsePluginConfig": PredicateBrowserUsePluginConfig,
+            "PredicateBrowserUseVerificationError": PredicateBrowserUseVerificationError,
+            "StepCheckSpec": StepCheckSpec,
+        }[name]
+    raise AttributeError(name)
+