Added sanity check baseline made by claude.

Also changed the location to a panel in VIEW_3D instead of menu.

checks/general/scene.py

@@ -0,0 +1,47 @@
+"""Scene-level settings shared by asset and shot files."""
+
+import math
+
+from ... import config
+from ...core import Check, Issue, contexts
+
+
+class UnitsCheck(Check):
+    id = "units"
+    label = "Units"
+    description = "Unit system, unit scale and length unit follow the production specs."
+    category = "Scene"
+    contexts = contexts.ALL
+    fix_description = "Set the production units"
+
+    def run(self, ctx):
+        units = ctx.scene.unit_settings
+        if units.system != config.UNIT_SYSTEM:
+            yield Issue(f"Unit system is {units.system}, expected {config.UNIT_SYSTEM}")
+        if not math.isclose(units.scale_length, config.UNIT_SCALE_LENGTH, rel_tol=1e-6):
+            yield Issue(f"Unit scale is {units.scale_length:g}, expected {config.UNIT_SCALE_LENGTH:g}")
+        if config.UNIT_LENGTH and units.length_unit != config.UNIT_LENGTH:
+            yield Issue(f"Length unit is {units.length_unit}, expected {config.UNIT_LENGTH}")
+
+    def fix(self, ctx, issues):
+        units = ctx.scene.unit_settings
+        units.system = config.UNIT_SYSTEM
+        units.scale_length = config.UNIT_SCALE_LENGTH
+        if config.UNIT_LENGTH:
+            units.length_unit = config.UNIT_LENGTH
+
+
+class FilenameCheck(Check):
+    id = "filename"
+    label = "File name"
+    description = "The file is saved and its name follows the naming pattern of the context."
+    category = "File"
+    contexts = contexts.ALL
+
+    def run(self, ctx):
+        if not ctx.filepath:
+            yield Issue("The file has never been saved")
+            return
+        pattern = config.FILENAME_PATTERNS.get(ctx.context_id)
+        if pattern and ctx.filename_match is None:
+            yield Issue(f"'{ctx.filename}' does not match {pattern}")