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+# AI Functions Deep Audit Report
+## Clustering, Idea Generation, and Content Generation
+
+**Date:** 2025-01-XX  
+**Scope:** Complete audit of AI functions for clustering, idea generation, and content generation to identify unused code and files safe to remove.
+
+---
+
+## Executive Summary
+
+This audit identifies **legacy code, deprecated functions, and unused implementations** that are safe to remove from the codebase. The current system uses a unified AI framework through `run_ai_task` → `AIEngine` → `BaseAIFunction` implementations.
+
+---
+
+## 1. CURRENT ACTIVE ARCHITECTURE
+
+### 1.1 Active Flow (What's Actually Used)
+
+```
+Frontend API Call
+  ↓
+views.py (auto_cluster/auto_generate_ideas/auto_generate_content)
+  ↓
+run_ai_task (ai/tasks.py) - Unified Celery task entrypoint
+  ↓
+AIEngine (ai/engine.py) - Orchestrator
+  ↓
+BaseAIFunction implementations:
+  - AutoClusterFunction (ai/functions/auto_cluster.py)
+  - GenerateIdeasFunction (ai/functions/generate_ideas.py)
+  - GenerateContentFunction (ai/functions/generate_content.py)
+  ↓
+AICore (ai/ai_core.py) - Centralized AI request handler
+  ↓
+AIProvider (OpenAI/Runware)
+```
+
+### 1.2 Active Files (KEEP)
+
+#### Core Framework
+- ✅ `backend/igny8_core/ai/tasks.py` - Unified Celery task (`run_ai_task`)
+- ✅ `backend/igny8_core/ai/engine.py` - AIEngine orchestrator
+- ✅ `backend/igny8_core/ai/base.py` - BaseAIFunction abstract class
+- ✅ `backend/igny8_core/ai/ai_core.py` - AICore centralized handler
+- ✅ `backend/igny8_core/ai/registry.py` - Function registry
+- ✅ `backend/igny8_core/ai/prompts.py` - PromptRegistry
+- ✅ `backend/igny8_core/ai/settings.py` - Model configurations
+- ✅ `backend/igny8_core/ai/constants.py` - AI constants
+- ✅ `backend/igny8_core/ai/tracker.py` - Progress tracking
+- ✅ `backend/igny8_core/ai/validators.py` - Validation functions
+
+#### Function Implementations
+- ✅ `backend/igny8_core/ai/functions/auto_cluster.py` - AutoClusterFunction
+- ✅ `backend/igny8_core/ai/functions/generate_ideas.py` - GenerateIdeasFunction
+- ✅ `backend/igny8_core/ai/functions/generate_content.py` - GenerateContentFunction
+- ✅ `backend/igny8_core/ai/functions/__init__.py` - Exports
+
+#### API Endpoints
+- ✅ `backend/igny8_core/modules/planner/views.py` - KeywordViewSet.auto_cluster(), ClusterViewSet.auto_generate_ideas()
+- ✅ `backend/igny8_core/modules/writer/views.py` - TasksViewSet.auto_generate_content()
+
+---
+
+## 2. DEPRECATED / UNUSED CODE (SAFE TO REMOVE)
+
+### 2.1 Legacy Wrapper Functions (NOT USED)
+
+#### ❌ `generate_ideas_core()` - **SAFE TO REMOVE**
+- **Location:** `backend/igny8_core/ai/functions/generate_ideas.py:234`
+- **Status:** Legacy wrapper function for backward compatibility
+- **Usage:** ❌ **NOT CALLED ANYWHERE** (only in commented test code)
+- **Purpose:** Was meant for direct calls without Celery, but all calls now go through `run_ai_task`
+- **Action:** **REMOVE** - Function and export from `__init__.py`
+
+#### ❌ `generate_content_core()` - **SAFE TO REMOVE**
+- **Location:** `backend/igny8_core/ai/functions/generate_content.py:303`
+- **Status:** Legacy wrapper function for backward compatibility
+- **Usage:** ❌ **NOT CALLED ANYWHERE** (only in commented test code)
+- **Purpose:** Was meant for direct calls without Celery, but all calls now go through `run_ai_task`
+- **Action:** **REMOVE** - Function and export from `__init__.py`
+
+### 2.2 AIProcessor Deprecated Methods (NOT USED)
+
+#### ❌ `AIProcessor.cluster_keywords()` - **SAFE TO REMOVE**
+- **Location:** `backend/igny8_core/utils/ai_processor.py:1049-1282`
+- **Status:** ⚠️ **DEPRECATED** (marked with deprecation warning)
+- **Usage:** ❌ **NOT CALLED ANYWHERE**
+- **Lines:** ~233 lines of code
+- **Action:** **REMOVE** entire method
+
+#### ❌ `AIProcessor.generate_ideas()` - **SAFE TO REMOVE**
+- **Location:** `backend/igny8_core/utils/ai_processor.py:1284-1363`
+- **Status:** Legacy method
+- **Usage:** ❌ **NOT CALLED ANYWHERE**
+- **Lines:** ~80 lines of code
+- **Action:** **REMOVE** entire method
+
+#### ❌ `AIProcessor.generate_content()` - **SAFE TO REMOVE**
+- **Location:** `backend/igny8_core/utils/ai_processor.py:433-531`
+- **Status:** Legacy method
+- **Usage:** ❌ **NOT CALLED ANYWHERE** (only called internally by `extract_image_prompts`, which is also unused)
+- **Lines:** ~98 lines of code
+- **Action:** **REMOVE** entire method
+
+#### ❌ `AIProcessor.extract_image_prompts()` - **SAFE TO REMOVE**
+- **Location:** `backend/igny8_core/utils/ai_processor.py:471-580`
+- **Status:** Legacy method
+- **Usage:** ❌ **NOT CALLED ANYWHERE** (new framework uses `GenerateImagesFunction` which uses `AICore.run_ai_request` directly)
+- **Lines:** ~110 lines of code
+- **Action:** **REMOVE** entire method
+
+**Note:** `AIProcessor.generate_image()` is **STILL USED** in `integration_views.py` for image generation, so keep the class and that method.
+
+### 2.3 Unused Exports
+
+#### ❌ `generate_ideas_core` export - **SAFE TO REMOVE**
+- **Location:** `backend/igny8_core/ai/functions/__init__.py:5,12`
+- **Action:** Remove from imports and `__all__`
+
+#### ❌ `generate_content_core` export - **SAFE TO REMOVE**
+- **Location:** `backend/igny8_core/ai/functions/__init__.py:6,14`
+- **Action:** Remove from imports and `__all__`
+
+### 2.4 Test File Cleanup
+
+#### ⚠️ `backend/igny8_core/ai/tests/test_run.py`
+- **Status:** Contains commented-out code referencing removed functions
+- **Action:** Clean up commented code (lines 16, 63, 75, 126-127)
+
+---
+
+## 3. AIProcessor - PARTIAL CLEANUP
+
+### 3.1 What to KEEP in AIProcessor
+
+✅ **KEEP:**
+- `AIProcessor.__init__()` - Initialization
+- `AIProcessor._get_api_key()` - API key retrieval
+- `AIProcessor._get_model()` - Model retrieval
+- `AIProcessor._call_openai()` - OpenAI API calls (used by generate_image)
+- `AIProcessor._extract_json_from_response()` - JSON extraction
+- `AIProcessor.generate_image()` - **STILL USED** in `integration_views.py`
+- `AIProcessor.get_prompt()` - May be used by generate_image
+- Constants imports (MODEL_RATES, etc.) - Used by AICore
+
+### 3.2 What to REMOVE from AIProcessor
+
+❌ **REMOVE:**
+- `AIProcessor.cluster_keywords()` - ~233 lines
+- `AIProcessor.generate_ideas()` - ~80 lines
+- `AIProcessor.generate_content()` - ~98 lines
+- `AIProcessor.extract_image_prompts()` - ~110 lines
+- **Total:** ~521 lines of unused code
+
+---
+
+## 4. FILES ALREADY DELETED (Good!)
+
+✅ **Already Removed:**
+- `backend/igny8_core/modules/planner/tasks.py` - ✅ Already deleted
+- `backend/igny8_core/modules/writer/tasks.py` - ✅ Already deleted
+
+---
+
+## 5. SUMMARY OF REMOVALS
+
+### 5.1 Functions to Remove
+
+| Function | Location | Lines | Status |
+|----------|----------|-------|--------|
+| `generate_ideas_core()` | `ai/functions/generate_ideas.py:234` | ~100 | ❌ Remove |
+| `generate_content_core()` | `ai/functions/generate_content.py:303` | ~85 | ❌ Remove |
+| `AIProcessor.cluster_keywords()` | `utils/ai_processor.py:1049` | ~233 | ❌ Remove |
+| `AIProcessor.generate_ideas()` | `utils/ai_processor.py:1284` | ~80 | ❌ Remove |
+| `AIProcessor.generate_content()` | `utils/ai_processor.py:433` | ~98 | ❌ Remove |
+| `AIProcessor.extract_image_prompts()` | `utils/ai_processor.py:471` | ~110 | ❌ Remove |
+
+**Total Lines to Remove:** ~706 lines
+
+### 5.2 Exports to Remove
+
+| Export | Location |
+|--------|----------|
+| `generate_ideas_core` | `ai/functions/__init__.py:5,12` |
+| `generate_content_core` | `ai/functions/__init__.py:6,14` |
+
+### 5.3 Test Cleanup
+
+| File | Action |
+|------|--------|
+| `ai/tests/test_run.py` | Remove commented code (lines 16, 63, 75, 126-127) |
+
+---
+
+## 6. VERIFICATION CHECKLIST
+
+Before removing, verify:
+
+- [ ] ✅ No imports of `generate_ideas_core` or `generate_content_core` anywhere
+- [ ] ✅ No calls to `AIProcessor.cluster_keywords()`, `generate_ideas()`, or `generate_content()`
+- [ ] ✅ All active code paths use `run_ai_task` → `AIEngine` → `BaseAIFunction`
+- [ ] ✅ `AIProcessor.generate_image()` is still used (verify in `integration_views.py`)
+- [ ] ✅ Constants from `ai_processor.py` are still imported by `AICore` (verify)
+
+---
+
+## 7. RECOMMENDED REMOVAL ORDER
+
+1. **Phase 1: Remove Legacy Wrapper Functions**
+   - Remove `generate_ideas_core()` from `generate_ideas.py`
+   - Remove `generate_content_core()` from `generate_content.py`
+   - Remove exports from `__init__.py`
+
+2. **Phase 2: Remove AIProcessor Deprecated Methods**
+   - Remove `AIProcessor.cluster_keywords()`
+   - Remove `AIProcessor.generate_ideas()`
+   - Remove `AIProcessor.generate_content()`
+   - Remove `AIProcessor.extract_image_prompts()` (depends on generate_content, so remove after)
+
+3. **Phase 3: Cleanup Tests**
+   - Clean up commented code in `test_run.py`
+
+4. **Phase 4: Verification**
+   - Run full test suite
+   - Verify all AI functions still work
+   - Check for any broken imports
+
+---
+
+## 8. IMPACT ANALYSIS
+
+### 8.1 No Breaking Changes Expected
+
+- ✅ All active code paths use the new framework
+- ✅ No external dependencies on removed functions
+- ✅ Views only use `run_ai_task` (verified)
+
+### 8.2 Benefits
+
+- 🎯 **~706 lines of dead code removed**
+- 🎯 **Clearer codebase** - Only active code remains
+- 🎯 **Easier maintenance** - No confusion about which path to use
+- 🎯 **Reduced technical debt**
+
+---
+
+## 9. FILES TO MODIFY
+
+### 9.1 Files to Edit
+
+1. `backend/igny8_core/ai/functions/generate_ideas.py`
+   - Remove `generate_ideas_core()` function (lines 234-333)
+
+2. `backend/igny8_core/ai/functions/generate_content.py`
+   - Remove `generate_content_core()` function (lines 303-386)
+
+3. `backend/igny8_core/ai/functions/__init__.py`
+   - Remove `generate_ideas_core` import and export
+   - Remove `generate_content_core` import and export
+
+4. `backend/igny8_core/utils/ai_processor.py`
+   - Remove `cluster_keywords()` method (lines 1049-1282)
+   - Remove `generate_ideas()` method (lines 1284-1363)
+   - Remove `generate_content()` method (lines 433-531)
+   - Remove `extract_image_prompts()` method (lines 471-580)
+
+5. `backend/igny8_core/ai/tests/test_run.py`
+   - Remove commented code referencing removed functions
+
+---
+
+## 10. CONCLUSION
+
+This audit identifies **~706 lines of unused legacy code** that can be safely removed without impacting functionality. All active code paths use the unified AI framework (`run_ai_task` → `AIEngine` → `BaseAIFunction`), making these legacy functions obsolete.
+
+**Recommendation:** Proceed with removal in phases as outlined above, with thorough testing after each phase.
+
diff --git a/AI_MASTER_ARCHITECTURE.md b/AI_MASTER_ARCHITECTURE.md
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+# AI Master Architecture Document
+## Clustering, Idea Generation, and Content Generation
+
+**Version:** 1.0  
+**Date:** 2025-01-XX  
+**Scope:** Complete architecture for 3 verified AI functions (clustering, idea generation, content generation)
+
+---
+
+## Table of Contents
+
+1. [Common Architecture](#1-common-architecture)
+2. [Auto Cluster Keywords](#2-auto-cluster-keywords)
+3. [Generate Ideas](#3-generate-ideas)
+4. [Generate Content](#4-generate-content)
+
+---
+
+## 1. Common Architecture
+
+### 1.1 Core Framework Files
+
+#### Entry Point
+- **File:** `backend/igny8_core/ai/tasks.py`
+- **Function:** `run_ai_task`
+- **Purpose:** Unified Celery task entrypoint for all AI functions
+- **Parameters:** `function_name` (str), `payload` (dict), `account_id` (int)
+- **Flow:** Loads function from registry → Creates AIEngine → Executes function
+
+#### Engine Orchestrator
+- **File:** `backend/igny8_core/ai/engine.py`
+- **Class:** `AIEngine`
+- **Purpose:** Central orchestrator managing lifecycle, progress, logging, cost tracking
+- **Methods:**
+  - `execute` - Main execution pipeline (6 phases: INIT, PREP, AI_CALL, PARSE, SAVE, DONE)
+  - `_handle_error` - Centralized error handling
+  - `_log_to_database` - Logs to AITaskLog model
+  - Helper methods: `_get_input_description`, `_build_validation_message`, `_get_prep_message`, `_get_ai_call_message`, `_get_parse_message`, `_get_parse_message_with_count`, `_get_save_message`, `_calculate_credits_for_clustering`
+
+#### Base Function Class
+- **File:** `backend/igny8_core/ai/base.py`
+- **Class:** `BaseAIFunction`
+- **Purpose:** Abstract base class defining interface for all AI functions
+- **Abstract Methods:**
+  - `get_name` - Returns function name (e.g., 'auto_cluster')
+  - `prepare` - Loads and prepares data
+  - `build_prompt` - Builds AI prompt
+  - `parse_response` - Parses AI response
+  - `save_output` - Saves results to database
+- **Optional Methods:**
+  - `get_metadata` - Returns display name, description, phases
+  - `get_max_items` - Returns max items limit (or None)
+  - `validate` - Validates input payload (default: checks for 'ids')
+  - `get_model` - Returns model override (default: None, uses account default)
+
+#### Function Registry
+- **File:** `backend/igny8_core/ai/registry.py`
+- **Functions:**
+  - `register_function` - Registers function class
+  - `register_lazy_function` - Registers lazy loader
+  - `get_function` - Gets function class by name (lazy loads if needed)
+  - `get_function_instance` - Gets function instance by name
+  - `list_functions` - Lists all registered functions
+- **Lazy Loaders:**
+  - `_load_auto_cluster` - Loads AutoClusterFunction
+  - `_load_generate_ideas` - Loads GenerateIdeasFunction
+  - `_load_generate_content` - Loads GenerateContentFunction
+
+#### AI Core Handler
+- **File:** `backend/igny8_core/ai/ai_core.py`
+- **Class:** `AICore`
+- **Purpose:** Centralized AI request handler for all text generation
+- **Methods:**
+  - `run_ai_request` - Makes API call to OpenAI/Runware
+  - `extract_json` - Extracts JSON from response (handles markdown code blocks)
+
+#### Prompt Registry
+- **File:** `backend/igny8_core/ai/prompts.py`
+- **Class:** `PromptRegistry`
+- **Purpose:** Centralized prompt management with hierarchical resolution
+- **Method:** `get_prompt` - Gets prompt with resolution order:
+  1. Task-level prompt_override (if exists)
+  2. DB prompt for (account, function)
+  3. Default fallback from DEFAULT_PROMPTS registry
+- **Prompt Types:**
+  - `clustering` - For auto_cluster function
+  - `ideas` - For generate_ideas function
+  - `content_generation` - For generate_content function
+- **Context Placeholders:**
+  - `[IGNY8_KEYWORDS]` - Replaced with keyword list
+  - `[IGNY8_CLUSTERS]` - Replaced with cluster list
+  - `[IGNY8_CLUSTER_KEYWORDS]` - Replaced with cluster keywords
+  - `[IGNY8_IDEA]` - Replaced with idea data
+  - `[IGNY8_CLUSTER]` - Replaced with cluster data
+  - `[IGNY8_KEYWORDS]` - Replaced with keywords (for content)
+
+#### Model Settings
+- **File:** `backend/igny8_core/ai/settings.py`
+- **Constants:**
+  - `MODEL_CONFIG` - Model configurations per function (model, max_tokens, temperature, response_format)
+  - `FUNCTION_ALIASES` - Legacy function name mappings
+- **Functions:**
+  - `get_model_config` - Gets model config for function (reads from IntegrationSettings if account provided)
+  - `get_model` - Gets model name for function
+  - `get_max_tokens` - Gets max tokens for function
+  - `get_temperature` - Gets temperature for function
+
+#### Validators
+- **File:** `backend/igny8_core/ai/validators.py`
+- **Functions:**
+  - `validate_ids` - Validates 'ids' array in payload
+  - `validate_keywords_exist` - Validates keywords exist in database
+  - `validate_cluster_exists` - Validates cluster exists
+  - `validate_tasks_exist` - Validates tasks exist
+  - `validate_cluster_limits` - Validates plan limits (currently disabled - always returns valid)
+  - `validate_api_key` - Validates API key is configured
+  - `validate_model` - Validates model is in supported list
+  - `validate_image_size` - Validates image size for model
+
+#### Progress Tracking
+- **File:** `backend/igny8_core/ai/tracker.py`
+- **Classes:**
+  - `StepTracker` - Tracks request/response steps
+  - `ProgressTracker` - Tracks Celery progress updates
+  - `CostTracker` - Tracks API costs and tokens
+  - `ConsoleStepTracker` - Console-based step logging
+
+#### Database Logging
+- **File:** `backend/igny8_core/ai/models.py`
+- **Model:** `AITaskLog`
+- **Fields:** `task_id`, `function_name`, `account`, `phase`, `message`, `status`, `duration`, `cost`, `tokens`, `request_steps`, `response_steps`, `error`, `payload`, `result`
+
+### 1.2 Execution Flow (All Functions)
+
+```
+1. API Endpoint (views.py)
+   ↓
+2. run_ai_task (tasks.py)
+   - Gets account from account_id
+   - Gets function instance from registry
+   - Creates AIEngine
+   ↓
+3. AIEngine.execute (engine.py)
+   Phase 1: INIT (0-10%)
+   - Calls function.validate()
+   - Updates progress tracker
+   ↓
+   Phase 2: PREP (10-25%)
+   - Calls function.prepare()
+   - Calls function.build_prompt()
+   - Updates progress tracker
+   ↓
+   Phase 3: AI_CALL (25-70%)
+   - Gets model config from settings
+   - Calls AICore.run_ai_request()
+   - Tracks cost and tokens
+   - Updates progress tracker
+   ↓
+   Phase 4: PARSE (70-85%)
+   - Calls function.parse_response()
+   - Updates progress tracker
+   ↓
+   Phase 5: SAVE (85-98%)
+   - Calls function.save_output()
+   - Logs credit usage
+   - Updates progress tracker
+   ↓
+   Phase 6: DONE (98-100%)
+   - Logs to AITaskLog
+   - Returns result
+```
+
+---
+
+## 2. Auto Cluster Keywords
+
+### 2.1 Function Implementation
+
+- **File:** `backend/igny8_core/ai/functions/auto_cluster.py`
+- **Class:** `AutoClusterFunction`
+- **Inherits:** `BaseAIFunction`
+
+### 2.2 API Endpoint
+
+- **File:** `backend/igny8_core/modules/planner/views.py`
+- **ViewSet:** `KeywordViewSet`
+- **Action:** `auto_cluster`
+- **Method:** POST
+- **URL Path:** `/v1/planner/keywords/auto_cluster/`
+- **Payload:**
+  - `ids` (list[int]) - Keyword IDs to cluster
+  - `sector_id` (int, optional) - Sector ID for filtering
+- **Response:**
+  - `success` (bool)
+  - `task_id` (str) - Celery task ID if async
+  - `clusters_created` (int) - Number of clusters created
+  - `keywords_updated` (int) - Number of keywords updated
+  - `message` (str)
+
+### 2.3 Function Methods
+
+#### `get_name()`
+- **Returns:** `'auto_cluster'`
+
+#### `get_metadata()`
+- **Returns:** Dict with `display_name`, `description`, `phases` (INIT, PREP, AI_CALL, PARSE, SAVE, DONE)
+
+#### `get_max_items()`
+- **Returns:** `None` (no limit)
+
+#### `validate(payload, account)`
+- **Validates:**
+  - Calls `validate_ids` to check for 'ids' array
+  - Calls `validate_keywords_exist` to verify keywords exist
+- **Returns:** Dict with `valid` (bool) and optional `error` (str)
+
+#### `prepare(payload, account)`
+- **Loads:**
+  - Keywords from database (filters by `ids`, `account`, optional `sector_id`)
+  - Uses `select_related` for: `account`, `site`, `site__account`, `sector`, `sector__site`
+- **Returns:** Dict with:
+  - `keywords` (list[Keyword objects])
+  - `keyword_data` (list[dict]) - Formatted data with: `id`, `keyword`, `volume`, `difficulty`, `intent`
+  - `sector_id` (int, optional)
+
+#### `build_prompt(data, account)`
+- **Gets Prompt:**
+  - Calls `PromptRegistry.get_prompt(function_name='auto_cluster', account, context)`
+  - Context includes: `KEYWORDS` (formatted keyword list), optional `SECTOR` (sector name)
+- **Formatting:**
+  - Formats keywords as: `"- {keyword} (Volume: {volume}, Difficulty: {difficulty}, Intent: {intent})"`
+  - Replaces `[IGNY8_KEYWORDS]` placeholder
+  - Adds JSON mode instruction if not present
+- **Returns:** Prompt string
+
+#### `parse_response(response, step_tracker)`
+- **Parsing:**
+  - Tries direct JSON parse first
+  - Falls back to `AICore.extract_json()` if needed (handles markdown code blocks)
+- **Extraction:**
+  - Extracts `clusters` array from JSON
+  - Handles both dict with 'clusters' key and direct array
+- **Returns:** List[Dict] with cluster data:
+  - `name` (str) - Cluster name
+  - `description` (str) - Cluster description
+  - `keywords` (list[str]) - List of keyword strings
+
+#### `save_output(parsed, original_data, account, progress_tracker, step_tracker)`
+- **Input:**
+  - `parsed` - List of cluster dicts from parse_response
+  - `original_data` - Dict from prepare() with `keywords` and `sector_id`
+- **Process:**
+  - Gets account, site, sector from first keyword
+  - For each cluster in parsed:
+    - Gets or creates `Clusters` record:
+      - Fields: `name`, `description`, `account`, `site`, `sector`, `status='active'`
+      - Uses `get_or_create` with name + account + site + sector
+    - Matches keywords (case-insensitive):
+      - Normalizes cluster keywords and available keywords to lowercase
+      - Updates matched `Keywords` records:
+        - Sets `cluster` foreign key
+        - Sets `status='mapped'`
+  - Recalculates cluster metrics:
+    - `keywords_count` - Count of keywords in cluster
+    - `volume` - Sum of keyword volumes (uses `volume_override` if available, else `seed_keyword__volume`)
+- **Returns:** Dict with:
+  - `count` (int) - Clusters created
+  - `clusters_created` (int) - Clusters created
+  - `keywords_updated` (int) - Keywords updated
+
+### 2.4 Database Models
+
+#### Keywords Model
+- **File:** `backend/igny8_core/modules/planner/models.py`
+- **Model:** `Keywords`
+- **Fields Used:**
+  - `id` - Keyword ID
+  - `seed_keyword` (ForeignKey) - Reference to SeedKeyword
+  - `keyword` (property) - Gets keyword text from seed_keyword
+  - `volume` (property) - Gets volume from volume_override or seed_keyword
+  - `difficulty` (property) - Gets difficulty from difficulty_override or seed_keyword
+  - `intent` (property) - Gets intent from seed_keyword
+  - `cluster` (ForeignKey) - Assigned cluster
+  - `status` - Status ('active', 'pending', 'mapped', 'archived')
+  - `account`, `site`, `sector` - From SiteSectorBaseModel
+
+#### Clusters Model
+- **File:** `backend/igny8_core/modules/planner/models.py`
+- **Model:** `Clusters`
+- **Fields Used:**
+  - `name` - Cluster name (unique)
+  - `description` - Cluster description
+  - `keywords_count` - Count of keywords (recalculated)
+  - `volume` - Sum of keyword volumes (recalculated)
+  - `status` - Status ('active')
+  - `account`, `site`, `sector` - From SiteSectorBaseModel
+
+### 2.5 AI Response Format
+
+**Expected JSON:**
+```json
+{
+  "clusters": [
+    {
+      "name": "Cluster Name",
+      "description": "Cluster description",
+      "keywords": ["keyword1", "keyword2", "keyword3"]
+    }
+  ]
+}
+```
+
+### 2.6 Progress Messages
+
+- **INIT:** "Validating {keyword1}, {keyword2}, {keyword3} and {X} more keywords" (shows first 3, then count)
+- **PREP:** "Loading {count} keyword(s)"
+- **AI_CALL:** "Generating clusters with Igny8 Semantic SEO Model"
+- **PARSE:** "{count} cluster(s) created"
+- **SAVE:** "Saving {count} cluster(s)"
+
+---
+
+## 3. Generate Ideas
+
+### 3.1 Function Implementation
+
+- **File:** `backend/igny8_core/ai/functions/generate_ideas.py`
+- **Class:** `GenerateIdeasFunction`
+- **Inherits:** `BaseAIFunction`
+
+### 3.2 API Endpoint
+
+- **File:** `backend/igny8_core/modules/planner/views.py`
+- **ViewSet:** `ClusterViewSet`
+- **Action:** `auto_generate_ideas`
+- **Method:** POST
+- **URL Path:** `/v1/planner/clusters/auto_generate_ideas/`
+- **Payload:**
+  - `ids` (list[int]) - Cluster IDs (max 10)
+- **Response:**
+  - `success` (bool)
+  - `task_id` (str) - Celery task ID if async
+  - `ideas_created` (int) - Number of ideas created
+  - `message` (str)
+
+### 3.3 Function Methods
+
+#### `get_name()`
+- **Returns:** `'generate_ideas'`
+
+#### `get_metadata()`
+- **Returns:** Dict with `display_name`, `description`, `phases` (INIT, PREP, AI_CALL, PARSE, SAVE, DONE)
+
+#### `get_max_items()`
+- **Returns:** `10` (max clusters per generation)
+
+#### `validate(payload, account)`
+- **Validates:**
+  - Calls `super().validate()` to check for 'ids' array and max_items limit
+  - Calls `validate_cluster_exists` for first cluster ID
+  - Calls `validate_cluster_limits` for plan limits (currently disabled)
+- **Returns:** Dict with `valid` (bool) and optional `error` (str)
+
+#### `prepare(payload, account)`
+- **Loads:**
+  - Clusters from database (filters by `ids`, `account`)
+  - Uses `select_related` for: `sector`, `account`, `site`, `sector__site`
+  - Uses `prefetch_related` for: `keywords`
+- **Gets Keywords:**
+  - For each cluster, loads `Keywords` with `select_related('seed_keyword')`
+  - Extracts keyword text from `seed_keyword.keyword`
+- **Returns:** Dict with:
+  - `clusters` (list[Cluster objects])
+  - `cluster_data` (list[dict]) - Formatted data with: `id`, `name`, `description`, `keywords` (list[str])
+  - `account` (Account object)
+
+#### `build_prompt(data, account)`
+- **Gets Prompt:**
+  - Calls `PromptRegistry.get_prompt(function_name='generate_ideas', account, context)`
+  - Context includes:
+    - `CLUSTERS` - Formatted cluster list: `"Cluster ID: {id} | Name: {name} | Description: {description}"`
+    - `CLUSTER_KEYWORDS` - Formatted cluster keywords: `"Cluster ID: {id} | Name: {name} | Keywords: {keyword1}, {keyword2}"`
+- **Replaces Placeholders:**
+  - `[IGNY8_CLUSTERS]` → clusters_text
+  - `[IGNY8_CLUSTER_KEYWORDS]` → cluster_keywords_text
+- **Returns:** Prompt string
+
+#### `parse_response(response, step_tracker)`
+- **Parsing:**
+  - Calls `AICore.extract_json()` to extract JSON from response
+  - Validates 'ideas' key exists in JSON
+- **Returns:** List[Dict] with idea data:
+  - `title` (str) - Idea title
+  - `description` (str or dict) - Idea description (can be JSON string)
+  - `content_type` (str) - Content type ('blog_post', 'article', etc.)
+  - `content_structure` (str) - Content structure ('cluster_hub', 'supporting_page', etc.)
+  - `cluster_id` (int, optional) - Cluster ID reference
+  - `cluster_name` (str, optional) - Cluster name reference
+  - `estimated_word_count` (int) - Estimated word count
+  - `covered_keywords` or `target_keywords` (str) - Target keywords
+
+#### `save_output(parsed, original_data, account, progress_tracker, step_tracker)`
+- **Input:**
+  - `parsed` - List of idea dicts from parse_response
+  - `original_data` - Dict from prepare() with `clusters` and `cluster_data`
+- **Process:**
+  - For each idea in parsed:
+    - Matches cluster:
+      - First tries by `cluster_id` from AI response
+      - Falls back to `cluster_name` matching
+      - Last resort: position-based matching (first idea → first cluster)
+    - Gets site from cluster (or cluster.sector.site)
+    - Handles description:
+      - If dict, converts to JSON string
+      - If not string, converts to string
+    - Creates `ContentIdeas` record:
+      - Fields:
+        - `idea_title` - From `title`
+        - `description` - Processed description
+        - `content_type` - From `content_type` (default: 'blog_post')
+        - `content_structure` - From `content_structure` (default: 'supporting_page')
+        - `target_keywords` - From `covered_keywords` or `target_keywords`
+        - `keyword_cluster` - Matched cluster
+        - `estimated_word_count` - From `estimated_word_count` (default: 1500)
+        - `status` - 'new'
+        - `account`, `site`, `sector` - From cluster
+- **Returns:** Dict with:
+  - `count` (int) - Ideas created
+  - `ideas_created` (int) - Ideas created
+
+### 3.4 Database Models
+
+#### Clusters Model
+- **File:** `backend/igny8_core/modules/planner/models.py`
+- **Model:** `Clusters`
+- **Fields Used:**
+  - `id` - Cluster ID
+  - `name` - Cluster name
+  - `description` - Cluster description
+  - `keywords` (related_name) - Related Keywords
+  - `account`, `site`, `sector` - From SiteSectorBaseModel
+
+#### ContentIdeas Model
+- **File:** `backend/igny8_core/modules/planner/models.py`
+- **Model:** `ContentIdeas`
+- **Fields Used:**
+  - `idea_title` - Idea title
+  - `description` - Idea description (can be JSON string)
+  - `content_type` - Content type ('blog_post', 'article', 'guide', 'tutorial')
+  - `content_structure` - Content structure ('cluster_hub', 'landing_page', 'pillar_page', 'supporting_page')
+  - `target_keywords` - Target keywords string
+  - `keyword_cluster` (ForeignKey) - Related cluster
+  - `estimated_word_count` - Estimated word count
+  - `status` - Status ('new', 'scheduled', 'published')
+  - `account`, `site`, `sector` - From SiteSectorBaseModel
+
+### 3.5 AI Response Format
+
+**Expected JSON:**
+```json
+{
+  "ideas": [
+    {
+      "title": "Idea Title",
+      "description": "Idea description or JSON structure",
+      "content_type": "blog_post",
+      "content_structure": "supporting_page",
+      "cluster_id": 1,
+      "cluster_name": "Cluster Name",
+      "estimated_word_count": 1500,
+      "covered_keywords": "keyword1, keyword2"
+    }
+  ]
+}
+```
+
+### 3.6 Progress Messages
+
+- **INIT:** "Verifying cluster integrity"
+- **PREP:** "Loading cluster keywords"
+- **AI_CALL:** "Generating ideas with Igny8 Semantic AI"
+- **PARSE:** "{count} high-opportunity idea(s) generated"
+- **SAVE:** "Content Outline for Ideas generated"
+
+---
+
+## 4. Generate Content
+
+### 4.1 Function Implementation
+
+- **File:** `backend/igny8_core/ai/functions/generate_content.py`
+- **Class:** `GenerateContentFunction`
+- **Inherits:** `BaseAIFunction`
+
+### 4.2 API Endpoint
+
+- **File:** `backend/igny8_core/modules/writer/views.py`
+- **ViewSet:** `TasksViewSet`
+- **Action:** `auto_generate_content`
+- **Method:** POST
+- **URL Path:** `/v1/writer/tasks/auto_generate_content/`
+- **Payload:**
+  - `ids` (list[int]) - Task IDs (max 10)
+- **Response:**
+  - `success` (bool)
+  - `task_id` (str) - Celery task ID if async
+  - `tasks_updated` (int) - Number of tasks updated
+  - `message` (str)
+
+### 4.3 Function Methods
+
+#### `get_name()`
+- **Returns:** `'generate_content'`
+
+#### `get_metadata()`
+- **Returns:** Dict with `display_name`, `description`, `phases` (INIT, PREP, AI_CALL, PARSE, SAVE, DONE)
+
+#### `get_max_items()`
+- **Returns:** `50` (max tasks per batch)
+
+#### `validate(payload, account)`
+- **Validates:**
+  - Calls `super().validate()` to check for 'ids' array and max_items limit
+  - Calls `validate_tasks_exist` to verify tasks exist
+- **Returns:** Dict with `valid` (bool) and optional `error` (str)
+
+#### `prepare(payload, account)`
+- **Loads:**
+  - Tasks from database (filters by `ids`, `account`)
+  - Uses `select_related` for: `account`, `site`, `sector`, `cluster`, `idea`
+- **Returns:** List[Task objects]
+
+#### `build_prompt(data, account)`
+- **Input:** Can be single Task or list[Task] (handles first task if list)
+- **Builds Idea Data:**
+  - `title` - From task.title
+  - `description` - From task.description
+  - `outline` - From task.idea.description (handles JSON structure):
+    - If JSON, formats as: `"## {H2 heading}\n### {H3 subheading}\nContent Type: {type}\nDetails: {details}"`
+    - If plain text, uses as-is
+  - `structure` - From task.idea.content_structure or task.content_structure
+  - `type` - From task.idea.content_type or task.content_type
+  - `estimated_word_count` - From task.idea.estimated_word_count
+- **Builds Cluster Data:**
+  - `cluster_name` - From task.cluster.name
+  - `description` - From task.cluster.description
+  - `status` - From task.cluster.status
+- **Builds Keywords Data:**
+  - From task.keywords (legacy) or task.idea.target_keywords
+- **Gets Prompt:**
+  - Calls `PromptRegistry.get_prompt(function_name='generate_content', account, task, context)`
+  - Context includes:
+    - `IDEA` - Formatted idea data string
+    - `CLUSTER` - Formatted cluster data string
+    - `KEYWORDS` - Keywords string
+- **Returns:** Prompt string
+
+#### `parse_response(response, step_tracker)`
+- **Parsing:**
+  - First tries JSON parse:
+    - If successful and dict, returns dict
+  - Falls back to plain text:
+    - Calls `normalize_content()` from `content_normalizer` to convert to HTML
+    - Returns dict with `content` field
+- **Returns:** Dict with:
+  - **If JSON:**
+    - `content` (str) - HTML content
+    - `title` (str, optional) - Content title
+    - `meta_title` (str, optional) - Meta title
+    - `meta_description` (str, optional) - Meta description
+    - `word_count` (int, optional) - Word count
+    - `primary_keyword` (str, optional) - Primary keyword
+    - `secondary_keywords` (list, optional) - Secondary keywords
+    - `tags` (list, optional) - Tags
+    - `categories` (list, optional) - Categories
+  - **If Plain Text:**
+    - `content` (str) - Normalized HTML content
+
+#### `save_output(parsed, original_data, account, progress_tracker, step_tracker)`
+- **Input:**
+  - `parsed` - Dict from parse_response
+  - `original_data` - Task object or list[Task] (handles first task if list)
+- **Process:**
+  - Extracts content fields from parsed dict:
+    - `content_html` - From `content` field
+    - `title` - From `title` or task.title
+    - `meta_title` - From `meta_title` or task.meta_title or task.title
+    - `meta_description` - From `meta_description` or task.meta_description or task.description
+    - `word_count` - From `word_count` or calculated from content
+    - `primary_keyword` - From `primary_keyword`
+    - `secondary_keywords` - From `secondary_keywords` (converts to list if needed)
+    - `tags` - From `tags` (converts to list if needed)
+    - `categories` - From `categories` (converts to list if needed)
+  - Calculates word count if not provided:
+    - Strips HTML tags and counts words
+  - Gets or creates `Content` record:
+    - Uses `get_or_create` with `task` (OneToOne relationship)
+    - Defaults: `html_content`, `word_count`, `status='draft'`, `account`, `site`, `sector`
+  - Updates `Content` fields:
+    - `html_content` - Content HTML
+    - `word_count` - Word count
+    - `title` - Content title
+    - `meta_title` - Meta title
+    - `meta_description` - Meta description
+    - `primary_keyword` - Primary keyword
+    - `secondary_keywords` - Secondary keywords (JSONField)
+    - `tags` - Tags (JSONField)
+    - `categories` - Categories (JSONField)
+    - `status` - Always 'draft' for newly generated content
+    - `metadata` - Extra fields from parsed dict (excludes standard fields)
+    - `account`, `site`, `sector`, `task` - Aligned from task
+  - Updates `Tasks` record:
+    - Sets `status='completed'`
+    - Updates `updated_at`
+- **Returns:** Dict with:
+  - `count` (int) - Tasks updated (always 1 per task)
+  - `tasks_updated` (int) - Tasks updated
+  - `word_count` (int) - Word count
+
+### 4.4 Database Models
+
+#### Tasks Model
+- **File:** `backend/igny8_core/modules/writer/models.py`
+- **Model:** `Tasks`
+- **Fields Used:**
+  - `id` - Task ID
+  - `title` - Task title
+  - `description` - Task description
+  - `keywords` - Keywords string (legacy)
+  - `cluster` (ForeignKey) - Related cluster
+  - `idea` (ForeignKey) - Related ContentIdeas
+  - `content_structure` - Content structure
+  - `content_type` - Content type
+  - `status` - Status ('queued', 'completed')
+  - `meta_title` - Meta title
+  - `meta_description` - Meta description
+  - `account`, `site`, `sector` - From SiteSectorBaseModel
+
+#### Content Model
+- **File:** `backend/igny8_core/modules/writer/models.py`
+- **Model:** `Content`
+- **Fields Used:**
+  - `task` (OneToOneField) - Related task
+  - `html_content` - HTML content
+  - `word_count` - Word count
+  - `title` - Content title
+  - `meta_title` - Meta title
+  - `meta_description` - Meta description
+  - `primary_keyword` - Primary keyword
+  - `secondary_keywords` (JSONField) - Secondary keywords list
+  - `tags` (JSONField) - Tags list
+  - `categories` (JSONField) - Categories list
+  - `status` - Status ('draft', 'review', 'published')
+  - `metadata` (JSONField) - Additional metadata
+  - `account`, `site`, `sector` - From SiteSectorBaseModel (auto-set from task)
+
+### 4.5 AI Response Format
+
+**Expected JSON:**
+```json
+{
+  "content": "<html>Content HTML</html>",
+  "title": "Content Title",
+  "meta_title": "Meta Title",
+  "meta_description": "Meta description",
+  "word_count": 1500,
+  "primary_keyword": "primary keyword",
+  "secondary_keywords": ["keyword1", "keyword2"],
+  "tags": ["tag1", "tag2"],
+  "categories": ["category1"]
+}
+```
+
+**Or Plain Text:**
+```
+Plain text content that will be normalized to HTML
+```
+
+### 4.6 Progress Messages
+
+- **INIT:** "Validating task"
+- **PREP:** "Preparing content idea"
+- **AI_CALL:** "Writing article with Igny8 Semantic AI"
+- **PARSE:** "{count} article(s) created"
+- **SAVE:** "Saving article"
+
+---
+
+## 5. Change Guide
+
+### 5.1 Where to Change Validation Logic
+
+- **File:** `backend/igny8_core/ai/validators.py`
+- **Functions:** `validate_ids`, `validate_keywords_exist`, `validate_cluster_exists`, `validate_tasks_exist`
+- **Or:** Override `validate()` method in function class
+
+### 5.2 Where to Change Data Loading
+
+- **File:** Function-specific file (e.g., `auto_cluster.py`)
+- **Method:** `prepare()`
+- **Change:** Modify queryset filters, select_related, prefetch_related
+
+### 5.3 Where to Change Prompts
+
+- **File:** `backend/igny8_core/ai/prompts.py`
+- **Method:** `PromptRegistry.get_prompt()`
+- **Change:** Modify `DEFAULT_PROMPTS` dict or update database prompts
+
+### 5.4 Where to Change Model Configuration
+
+- **File:** `backend/igny8_core/ai/settings.py`
+- **Constant:** `MODEL_CONFIG`
+- **Change:** Update model, max_tokens, temperature, response_format per function
+
+### 5.5 Where to Change Response Parsing
+
+- **File:** Function-specific file (e.g., `generate_content.py`)
+- **Method:** `parse_response()`
+- **Change:** Modify JSON extraction or plain text handling
+
+### 5.6 Where to Change Database Saving
+
+- **File:** Function-specific file (e.g., `auto_cluster.py`)
+- **Method:** `save_output()`
+- **Change:** Modify model creation/update logic, field mappings
+
+### 5.7 Where to Change Progress Messages
+
+- **File:** `backend/igny8_core/ai/engine.py`
+- **Methods:** `_get_prep_message()`, `_get_ai_call_message()`, `_get_parse_message()`, `_get_save_message()`
+- **Or:** Override in function class `get_metadata()` phases
+
+### 5.8 Where to Change Error Handling
+
+- **File:** `backend/igny8_core/ai/engine.py`
+- **Method:** `_handle_error()`
+- **Change:** Modify error logging, error response format
+
+---
+
+## 6. Dependencies
+
+### 6.1 Function Dependencies
+
+- All functions depend on: `BaseAIFunction`, `AICore`, `PromptRegistry`, `get_model_config`
+- Clustering depends on: `Keywords`, `Clusters` models
+- Ideas depends on: `Clusters`, `ContentIdeas`, `Keywords` models
+- Content depends on: `Tasks`, `Content`, `ContentIdeas`, `Clusters` models
+
+### 6.2 External Dependencies
+
+- **Celery:** For async task execution (`run_ai_task`)
+- **OpenAI API:** For AI text generation (via `AICore.run_ai_request`)
+- **Django ORM:** For database operations
+- **IntegrationSettings:** For account-specific model configuration
+
+---
+
+## 7. Key Relationships
+
+### 7.1 Clustering Flow
+```
+Keywords → Clusters (many-to-one)
+- Keywords.cluster (ForeignKey)
+- Clusters.keywords (related_name)
+```
+
+### 7.2 Ideas Flow
+```
+Clusters → ContentIdeas (one-to-many)
+- ContentIdeas.keyword_cluster (ForeignKey)
+- Clusters.ideas (related_name, if exists)
+```
+
+### 7.3 Content Flow
+```
+Tasks → Content (one-to-one)
+- Content.task (OneToOneField)
+- Tasks.content_record (related_name)
+
+Tasks → ContentIdeas (many-to-one)
+- Tasks.idea (ForeignKey)
+- ContentIdeas.tasks (related_name)
+
+Tasks → Clusters (many-to-one)
+- Tasks.cluster (ForeignKey)
+- Clusters.tasks (related_name)
+```
+
+---
+
+## 8. Notes
+
+- All functions use the same execution pipeline through `AIEngine.execute()`
+- Progress tracking is handled automatically by `AIEngine`
+- Cost tracking is handled automatically by `CostTracker`
+- Database logging is handled automatically by `AITaskLog`
+- Model configuration can be overridden per account via `IntegrationSettings`
+- Prompts can be overridden per account via database prompts
+- All functions support both async (Celery) and sync execution
+- Error handling is centralized in `AIEngine._handle_error()`
+