--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/piecrust/environment.py	Sat Dec 21 14:44:02 2013 -0800
@@ -0,0 +1,52 @@
+import logging
+from decorators import lazy_property
+
+
+logger = logging.getLogger(__name__)
+
+
+class PageRepository(object):
+    pass
+
+
+class ExecutionContext(object):
+    pass
+
+
+class Environment(object):
+    def __init__(self):
+        self.page_repository = PageRepository()
+        self._execution_ctx = None
+
+    def initialize(self, app):
+        pass
+
+    @lazy_property
+    def pages(self):
+        logger.debug("Loading pages...")
+        return self._loadPages()
+
+    @lazy_property
+    def posts(self):
+        logger.debug("Loading posts...")
+        return self._loadPosts()
+
+    @lazy_property
+    def file_system(self):
+        return None
+
+    def get_execution_context(self, auto_create=False):
+        if auto_create and self._execution_ctx is None:
+            self._execution_ctx = ExecutionContext()
+        return self._execution_ctx
+
+    def _loadPages(self):
+        raise NotImplementedError()
+
+    def _loadPosts(self):
+        raise NotImplementedError()
+
+
+class StandardEnvironment(Environment):
+    pass
+