refactor(semantics): migrate TIER system to adaptive COMPLEXITY 1-5 scale

- Replaced rigid TIERs with continuous COMPLEXITY 1-5 scale in semantics.md
- Updated generate_semantic_map.py to parse and score based on Complexity
- Added backward compatibility mapping for legacy TIERs
- Migrated all .ai/shots examples to use @COMPLEXITY and updated relation syntax
- Added trivial_utility.py shot to demonstrate implicit Complexity 1 token savings

.ai/shots/plugin_example.py

@@ -1,10 +1,9 @@
 # [DEF:PluginExampleShot:Module]
-# @TIER: STANDARD
+# @COMPLEXITY: 3
 # @SEMANTICS: Plugin, Core, Extension
 # @PURPOSE: Reference implementation of a plugin following GRACE standards.
 # @LAYER: Domain (Business Logic)
-# @RELATION: INHERITS -> PluginBase
-# @INVARIANT: get_schema must return valid JSON Schema.
+# @RELATION: [INHERITS] ->[PluginBase]
 
 from typing import Dict, Any, Optional
 from ..core.plugin_base import PluginBase
@@ -14,6 +13,7 @@ from ..core.logger import logger, belief_scope
 
 # [DEF:ExamplePlugin:Class]
 # @PURPOSE: A sample plugin to demonstrate execution context and logging.
+# @RELATION: [INHERITS] ->[PluginBase]
 class ExamplePlugin(PluginBase):
     @property
     def id(self) -> str:
@@ -21,7 +21,6 @@ class ExamplePlugin(PluginBase):
 
     #[DEF:get_schema:Function]
     # @PURPOSE: Defines input validation schema.
-    # @DATA_CONTRACT: Input -> None, Output -> Dict (JSON Schema draft 7)
     def get_schema(self) -> Dict[str, Any]:
         return {
             "type": "object",
@@ -36,8 +35,9 @@ class ExamplePlugin(PluginBase):
     #[/DEF:get_schema:Function]
 
     # [DEF:execute:Function]
+    # @COMPLEXITY: 4
     # @PURPOSE: Core plugin logic with structured logging and scope isolation.
-    # @DATA_CONTRACT: Input -> (params: Dict, context: Optional[TaskContext]), Output -> None
+    # @RELATION: [BINDS_TO] ->[context.logger]
     # @PRE: params must be validated against get_schema() before calling.
     # @POST: Plugin payload is processed; progress is reported if context exists.
     # @SIDE_EFFECT: Emits logs to centralized system and TaskContext.