context loading, path resolution, form state, dynamic rules, and provider-neutral assessment runner/cache boundary

examples/runtime/business-letter-prefill.md

@@ -0,0 +1,23 @@
+---
+document_type: business-letter
+---
+
+# Follow-Up Letter
+
+## Greeting
+
+Dear Ada Lovelace,
+
+## Body
+
+Thank you for the thoughtful discussion about structured Markdown generation.
+We reviewed the requirements and will send a concise proposal that separates
+document contracts, field prefill, validation diagnostics, and optional semantic
+assessment. This keeps the implementation practical while leaving room for
+future automation.
+
+## Closing
+
+Kind regards,
+
+Markitect Team