diff --git a/CHANGELOG_NEW_API.md b/CHANGELOG_NEW_API.md
deleted file mode 100644
index ad05684..0000000
--- a/CHANGELOG_NEW_API.md
+++ /dev/null
@@ -1,265 +0,0 @@
-# API Schema Update - Resume Mode & Idempotent Behavior
-
-## Summary
-
-Updated the `/simulate/trigger` endpoint to support three new use cases:
-1. **Resume mode**: Continue simulations from last completed date per model
-2. **Idempotent behavior**: Skip already-completed dates by default
-3. **Explicit date ranges**: Clearer API contract with required `end_date`
-
-## Breaking Changes
-
-### Request Schema
-
-**Before:**
-```json
-{
-  "start_date": "2025-10-01",        // Required
-  "end_date": "2025-10-02",          // Optional (defaulted to start_date)
-  "models": ["gpt-5"]                // Optional
-}
-```
-
-**After:**
-```json
-{
-  "start_date": "2025-10-01",        // Optional (null for resume mode)
-  "end_date": "2025-10-02",          // REQUIRED (cannot be null/empty)
-  "models": ["gpt-5"],               // Optional
-  "replace_existing": false          // NEW: Optional (default: false)
-}
-```
-
-### Key Changes
-
-1. **`end_date` is now REQUIRED**
-   - Cannot be `null` or empty string
-   - Must always be provided
-   - For single-day simulation, set `start_date` == `end_date`
-
-2. **`start_date` is now OPTIONAL**
-   - Can be `null` or omitted to enable resume mode
-   - When `null`, each model resumes from its last completed date
-   - If no data exists (cold start), uses `end_date` as single-day simulation
-
-3. **NEW `replace_existing` field**
-   - `false` (default): Skip already-completed model-days (idempotent)
-   - `true`: Re-run all dates even if previously completed
-
-## Use Cases
-
-### 1. Explicit Date Range
-```bash
-curl -X POST http://localhost:8080/simulate/trigger \
-  -H "Content-Type: application/json" \
-  -d '{
-    "start_date": "2025-10-01",
-    "end_date": "2025-10-31",
-    "models": ["gpt-5"]
-  }'
-```
-
-### 2. Single Date
-```bash
-curl -X POST http://localhost:8080/simulate/trigger \
-  -H "Content-Type: application/json" \
-  -d '{
-    "start_date": "2025-10-15",
-    "end_date": "2025-10-15",
-    "models": ["gpt-5"]
-  }'
-```
-
-### 3. Resume Mode (NEW)
-```bash
-curl -X POST http://localhost:8080/simulate/trigger \
-  -H "Content-Type: application/json" \
-  -d '{
-    "start_date": null,
-    "end_date": "2025-10-31",
-    "models": ["gpt-5"]
-  }'
-```
-
-**Behavior:**
-- Model "gpt-5" last completed: `2025-10-15`
-- Will simulate: `2025-10-16` through `2025-10-31`
-- If no data exists: Will simulate only `2025-10-31`
-
-### 4. Idempotent Simulation (NEW)
-```bash
-curl -X POST http://localhost:8080/simulate/trigger \
-  -H "Content-Type: application/json" \
-  -d '{
-    "start_date": "2025-10-01",
-    "end_date": "2025-10-31",
-    "models": ["gpt-5"],
-    "replace_existing": false
-  }'
-```
-
-**Behavior:**
-- Checks database for already-completed dates
-- Only simulates dates that haven't been completed yet
-- Returns error if all dates already completed
-
-### 5. Force Replace
-```bash
-curl -X POST http://localhost:8080/simulate/trigger \
-  -H "Content-Type: application/json" \
-  -d '{
-    "start_date": "2025-10-01",
-    "end_date": "2025-10-31",
-    "models": ["gpt-5"],
-    "replace_existing": true
-  }'
-```
-
-**Behavior:**
-- Re-runs all dates regardless of completion status
-
-## Implementation Details
-
-### Files Modified
-
-1. **`api/main.py`**
-   - Updated `SimulateTriggerRequest` Pydantic model
-   - Added validators for `end_date` (required)
-   - Added validators for `start_date` (optional, can be null)
-   - Added resume logic per model
-   - Added idempotent filtering logic
-   - Fixed bug with `start_date=None` in price data checks
-
-2. **`api/job_manager.py`**
-   - Added `get_last_completed_date_for_model(model)` method
-   - Added `get_completed_model_dates(models, start_date, end_date)` method
-   - Updated `create_job()` to accept `model_day_filter` parameter
-
-3. **`tests/integration/test_api_endpoints.py`**
-   - Updated all tests to use new schema
-   - Added tests for resume mode
-   - Added tests for idempotent behavior
-   - Added tests for validation rules
-
-4. **Documentation Updated**
-   - `API_REFERENCE.md` - Complete API documentation with examples
-   - `QUICK_START.md` - Updated getting started examples
-   - `docs/user-guide/using-the-api.md` - Updated user guide
-   - Client library examples (Python, TypeScript)
-
-### Database Schema
-
-No changes to database schema. New functionality uses existing tables:
-- `job_details` table tracks completion status per model-day
-- Unique index on `(job_id, date, model)` ensures no duplicates
-
-### Per-Model Independence
-
-Each model maintains its own completion state:
-```
-Model A: last_completed_date = 2025-10-15
-Model B: last_completed_date = 2025-10-10
-
-Request: start_date=null, end_date=2025-10-31
-
-Result:
-- Model A simulates: 2025-10-16 through 2025-10-31 (16 days)
-- Model B simulates: 2025-10-11 through 2025-10-31 (21 days)
-```
-
-## Migration Guide
-
-### For API Clients
-
-**Old Code:**
-```python
-# Single day (old)
-client.trigger_simulation(start_date="2025-10-15")
-```
-
-**New Code:**
-```python
-# Single day (new) - MUST provide end_date
-client.trigger_simulation(start_date="2025-10-15", end_date="2025-10-15")
-
-# Or use resume mode
-client.trigger_simulation(start_date=None, end_date="2025-10-31")
-```
-
-### Validation Changes
-
-**Will Now Fail:**
-```json
-{
-  "start_date": "2025-10-01",
-  "end_date": ""              // ❌ Empty string rejected
-}
-```
-
-```json
-{
-  "start_date": "2025-10-01",
-  "end_date": null            // ❌ Null rejected
-}
-```
-
-```json
-{
-  "start_date": "2025-10-01"  // ❌ Missing end_date
-}
-```
-
-**Will Work:**
-```json
-{
-  "end_date": "2025-10-31"    // ✓ start_date omitted = resume mode
-}
-```
-
-```json
-{
-  "start_date": null,
-  "end_date": "2025-10-31"    // ✓ Explicit null = resume mode
-}
-```
-
-## Benefits
-
-1. **Daily Automation**: Resume mode perfect for cron jobs
-   - No need to calculate "yesterday's date"
-   - Just provide today as end_date
-
-2. **Idempotent by Default**: Safe to re-run
-   - Accidentally trigger same date? No problem, it's skipped
-   - Explicit `replace_existing=true` when you want to re-run
-
-3. **Per-Model Independence**: Flexible deployment
-   - Can add new models without re-running old ones
-   - Models can progress at different rates
-
-4. **Clear API Contract**: No ambiguity
-   - `end_date` always required
-   - `start_date=null` clearly means "resume"
-   - Default behavior is safe (idempotent)
-
-## Backward Compatibility
-
-⚠️ **This is a BREAKING CHANGE** for clients that:
-- Rely on `end_date` defaulting to `start_date`
-- Don't explicitly provide `end_date`
-
-**Migration:** Update all API calls to explicitly provide `end_date`.
-
-## Testing
-
-Run integration tests:
-```bash
-pytest tests/integration/test_api_endpoints.py -v
-```
-
-All tests updated to cover:
-- Single-day simulation
-- Date ranges
-- Resume mode (cold start and with existing data)
-- Idempotent behavior
-- Validation rules