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+---
+description: Sync LLM parameter options between full model dialog and chat side panel
+---
+
+Audit and sync LLM parameter configurations between the two UI editors. Goal: identical `value` fields in option arrays + equivalent onChange logic. Labels/descriptions can differ for UI space.
+
+**Files to Compare:**
+1. **Full Model Dialog**: `src/modules/llms/models-modal/LLMParametersEditor.tsx` (main branch)
+2. **Chat Side Panel**: `src/apps/chat/components/layout-panel/ChatPanelModelParameters.tsx` (main derived branches only)
+
+**Reference Documentation:**
+- Parameter system: `kb/systems/LLM-parameters-system.md`
+- Parameter registry: `src/common/stores/llms/llms.parameters.ts`
+
+**Task: Perform a comprehensive audit**
+
+1. **Read both files** and extract all option arrays (e.g., `_reasoningEffortOptions`, `_antEffortOptions`, `_geminiThinkingLevelOptions`, etc.)
+
+2. **Check for missing parameters:**
+   - Parameters handled in `LLMParametersEditor.tsx` but NOT in `ChatPanelModelParameters.tsx`
+   - Parameters in `ChatPanelModelParameters.tsx`'s `_interestingParameters` array but missing UI controls
+   - Note: The side panel intentionally shows only "interesting" parameters - focus on those listed in `_interestingParameters`
+
+3. **Check for value mismatches** between corresponding option arrays:
+   - Different number of options (e.g., 3 vs 4 options)
+   - Same label but different `value` (this causes the bug in issue #926)
+   - Different labels for the same `value`
+   - Missing `_UNSPECIFIED`/Default option in one but not the other
+
+4. **Check onChange handler consistency:**
+   - Both should remove parameter on `_UNSPECIFIED` selection
+   - Both should set explicit values the same way
+   - Watch for conditions like `value === 'high'` that may differ
+
+**Output Format:**
+
+```
+## Parameter Sync Audit Report
+
+### Missing Parameters
+- [ ] `llmVndXyz` - In full dialog, missing from side panel
+
+### Value Mismatches
+- [ ] `_xyzOptions`:
+  - Full dialog: [values...]
+  - Side panel: [values...]
+  - Issue: [description]
+
+### Handler Inconsistencies
+- [ ] `llmVndXyz` onChange differs: [explanation]
+
+### Recommended Fixes
+1. [Specific fix with code snippet if needed]
+```
+
+**Fix Direction:** Full dialog is source of truth. Update side panel to match its values when mismatched.
+
+**Notes:**
+- Side panel uses shorter descriptions (space-constrained) - that's fine
+- Variable names may differ (e.g., `_anthropicEffortOptions` vs `_antEffortOptions`) - that's fine, but same is better
+- `value` fields must be identical sets
+- `_UNSPECIFIED` must mean the same thing in both
+- onChange: remove on `_UNSPECIFIED`, set explicit value otherwise