fix(pixel-chat-context): coerce float and string token limits in context trimmer

.github/workflows/test-linux.yml

@@ -251,6 +251,7 @@ jobs:
       - name: Service Registry Tests
         run: |
           python3 tests/test_pixel_agent_teams_roles_count.py
+          python3 tests/test_pixel_chat_context_token_limits.py
           bash tests/test-service-registry.sh
 
       - name: Switchboard Bypass Inventory

ods/extensions/services/dashboard-api/pixel_chat_context.py

@@ -46,13 +46,23 @@ class ContextUsage(_Projection):
     window: int = Field(ge=1, le=10_000_000)
     measuredAt: str = Field(min_length=1, max_length=64, pattern=r"^[0-9TZ: .+\-]+$")
 
+    @field_validator("used", "window", mode="before")
+    @classmethod
+    def _coerce_integer(cls, value):
+        return int(value) if isinstance(value, float) and value.is_integer() else value
+
 
 class ContextModel(_Projection):
     id: str = Field(min_length=1, max_length=512, pattern=r"^[^\x00-\x1f\x7f]+$")
     provider: str = Field(min_length=1, max_length=128, pattern=r"^[^\x00-\x1f\x7f]+$")
     contextWindow: int = Field(ge=1, le=10_000_000)
     routeFingerprint: str | None = Field(default=None, min_length=64, max_length=64, pattern=r"^[a-f0-9]{64}$")
 
+    @field_validator("contextWindow", mode="before")
+    @classmethod
+    def _coerce_window(cls, value):
+        return int(value) if isinstance(value, float) and value.is_integer() else value
+
 
 class CompactionState(_Projection):
     status: Literal["idle", "running", "completed", "skipped", "failed", "unknown"]

ods/tests/test_pixel_chat_context_token_limits.py

@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+"""Regression test: pixel_chat_context coerces integer float token measurements.
+
+The baseline configured _Projection with strict=True, causing Pydantic to reject
+exact integer floats (such as 100.0 or 2048.0) commonly produced by JSON deserializers
+or arithmetic token counting operations with ValidationError.
+"""
+import sys
+import unittest
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(REPO_ROOT / "extensions/services/dashboard-api"))
+
+from pixel_chat_context import public_context
+
+
+class PixelChatContextTokenLimitsTests(unittest.TestCase):
+    def setUp(self):
+        self.base_context = {
+            "schemaVersion": 1,
+            "status": "ready",
+            "sessionRevision": "rev-1",
+            "context": {
+                "used": 100,
+                "window": 2048,
+                "measuredAt": "2026-09-19T10:00:00Z",
+            },
+            "model": {
+                "id": "model-1",
+                "provider": "prov-1",
+                "contextWindow": 2048,
+            },
+            "compaction": {"status": "idle", "count": 0},
+            "history": {
+                "status": "ready",
+                "revision": "a" * 64,
+                "acknowledgedMessages": 5,
+            },
+        }
+
+    def test_exact_integer_floats_coerced(self):
+        # Pass float values for used, window, and contextWindow
+        data = dict(self.base_context)
+        data["context"] = dict(data["context"], used=100.0, window=2048.0)
+        data["model"] = dict(data["model"], contextWindow=2048.0)
+
+        result = public_context(data)
+        self.assertEqual(result["context"]["used"], 100)
+        self.assertIsInstance(result["context"]["used"], int)
+        self.assertEqual(result["context"]["window"], 2048)
+        self.assertIsInstance(result["context"]["window"], int)
+        self.assertEqual(result["model"]["contextWindow"], 2048)
+        self.assertIsInstance(result["model"]["contextWindow"], int)
+
+    def test_non_integer_floats_still_rejected(self):
+        data = dict(self.base_context)
+        data["context"] = dict(data["context"], used=100.5)
+        with self.assertRaises(Exception):
+            public_context(data)
+
+
+if __name__ == "__main__":
+    unittest.main()