refactor: move to pure community extension model, removing core file modifications

Author: UmmeHabiba1312

presets/community/architect-preview/preset.yml

@@ -0,0 +1,6 @@
+id: architect-preview
+name: Architect Impact Previewer
+version: 1.0.0
+description: Previews architectural risks and complexity before implementation.
+author: Umme Habiba
+type: command

scripts/impact_analyzer.py …itect-preview/scripts/impact_analyzer.pyscripts/impact_analyzer.py renamed to presets/community/architect-preview/scripts/impact_analyzer.py scripts/impact_analyzer.py renamed to presets/community/architect-preview/scripts/impact_analyzer.py

@@ -1,7 +1,7 @@
 ---
 description: Preview the architectural impact and risks of a proposed change across all specifications.
 scripts:
-  sh: python3 scripts/impact_analyzer.py --change "$ARGUMENTS" --model "${AI_MODEL_ID:-gpt-4o}"
+  sh: python3 ../../scripts/impact_analyzer.py --change "$ARGUMENTS" --model "${AI_MODEL_ID:-gpt-4o}"
 ---
 
 ## User Input

templates/commands/preview.md …ct-preview/templates/commands/preview.mdtemplates/commands/preview.md renamed to presets/community/architect-preview/templates/commands/preview.md templates/commands/preview.md renamed to presets/community/architect-preview/templates/commands/preview.md

@@ -862,7 +862,6 @@ def _get_skills_dir(project_path: Path, selected_ai: str) -> Path:
     "plan": "Generate technical implementation plans from feature specifications.",
     "tasks": "Break down implementation plans into actionable task lists.",
     "implement": "Execute all tasks from the task breakdown to build the feature.",
-    "preview": "Predict the architectural impact, complexity, and risks of proposed changes.",
     "analyze": "Perform cross-artifact consistency analysis across spec.md, plan.md, and tasks.md.",
     "clarify": "Structured clarification workflow for underspecified requirements.",
     "constitution": "Create or update project governing principles and development guidelines.",

src/specify_cli/__init__.py

@@ -17,7 +17,6 @@
     "plan": "Optional guidance for the planning phase",
     "tasks": "Optional task generation constraints",
     "implement": "Optional implementation guidance or task filter",
-    "preview": "Predict the architectural impact, complexity, and risks of proposed changes.",
     "analyze": "Optional focus areas for analysis",
     "clarify": "Optional areas to clarify in the spec",
     "constitution": "Principles or values for the project constitution",