semi implemented and features implemented save checkpoint

docs/features/unchecked/advisoryai/evidence-first-citations-in-chat-responses.md

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+# Evidence-First Citations in Chat Responses
+
+## Module
+AdvisoryAI
+
+## Status
+IMPLEMENTED
+
+## Description
+Evidence bundle assembly with citations in chat responses and UI evidence drilldown is implemented.
+
+## Implementation Details
+- **Modules**: `src/AdvisoryAi/StellaOps.AdvisoryAI/Chat/`, `src/AdvisoryAi/StellaOps.AdvisoryAI/Explanation/`
+- **Key Classes**:
+  - `EvidenceAnchoredExplanationGenerator` (`src/AdvisoryAi/StellaOps.AdvisoryAI/Explanation/EvidenceAnchoredExplanationGenerator.cs`) - generates explanations anchored to evidence citations
+  - `EvidencePackChatIntegration` (`src/AdvisoryAi/StellaOps.AdvisoryAI/Chat/EvidencePackChatIntegration.cs`) - embeds evidence citations into chat responses
+  - `GroundingValidator` (`src/AdvisoryAi/StellaOps.AdvisoryAI/Chat/GroundingValidator.cs`) - validates that AI claims are grounded in cited evidence
+  - `ExplanationPromptTemplates` (`src/AdvisoryAi/StellaOps.AdvisoryAI/Explanation/ExplanationPromptTemplates.cs`) - prompt templates for citation-rich explanations
+  - `DefaultExplanationPromptService` (`src/AdvisoryAi/StellaOps.AdvisoryAI/Explanation/DefaultExplanationPromptService.cs`) - assembles explanation prompts with citation instructions
+  - `InMemoryExplanationStore` (`src/AdvisoryAi/StellaOps.AdvisoryAI/Explanation/InMemoryExplanationStore.cs`) - stores explanation requests and results
+  - `ActionProposalParser` (`src/AdvisoryAi/StellaOps.AdvisoryAI/Chat/ActionProposalParser.cs`) - parses action proposals from LLM responses with citation references
+- **Interfaces**: `IExplanationGenerator`, `IExplanationRequestStore`, `IEvidenceRetrievalService`
+- **Source**: Feature matrix scan
+
+## E2E Test Plan
+- [ ] Generate an explanation via `EvidenceAnchoredExplanationGenerator` and verify it contains citation references to evidence items
+- [ ] Verify `GroundingValidator` rejects explanations that make claims without corresponding evidence citations
+- [ ] Verify `EvidencePackChatIntegration` embeds clickable citation references in chat response markdown
+- [ ] Verify `ExplanationPromptTemplates` instruct the LLM to cite evidence sources in its output
+- [ ] Verify `InMemoryExplanationStore` persists explanation requests and results for later retrieval
+- [ ] Verify `ActionProposalParser` extracts cited evidence IDs from LLM-generated action proposals