update README

Author: hoxhaeris

AUTHORIZATION.md

@@ -4,33 +4,43 @@ This document describes the organizational data-based authorization system integ
 
 ## Overview
 
-The authorization system provides fine-grained access control for bot commands based on organizational data. It integrates with hierarchical organizational structures and supports multiple authorization levels including user-specific, team-based, and organization-based permissions.
+The authorization system provides fine-grained access control for bot commands based on organizational data. It now uses a modern, indexed data structure that provides fast lookups and comprehensive organizational hierarchy information. The system supports multiple authorization levels including user-specific, team-based, and organization-based permissions.
 
 ## Key Features
 
-- **Hierarchical Organization Data**: Processes nested organizational structures with teams and employees
+- **Indexed Organization Data**: Uses pre-computed indexes for O(1) lookups and fast authorization checks
+- **Complete Organizational Hierarchy**: Shows full ancestry chain including teams, organizations, pillars, and team groups
 - **Multiple Authorization Levels**: Support for user UID, team membership, and organization-based permissions
 - **Hot Reload**: Automatic updates when organizational data or authorization config changes
-- **Enhanced Troubleshooting**: Comprehensive `whoami` command showing user permissions and available commands
+- **Enhanced Troubleshooting**: Comprehensive `whoami` command showing complete organizational context
 - **Fallback Safety**: Graceful degradation when authorization service is unavailable
+- **Modular Architecture**: Clean separation between core data service and Slack-specific authorization logic
 
 ## Architecture
 
 ```
 ┌─────────────────┐    ┌──────────────────┐    ┌─────────────────┐
-│ Organizational  │    │ Authorization    │    │ Slack Commands  │
-│ Data (JSON)     │───▶│ Service          │───▶│ & Handlers      │
+│ Indexed Org     │    │ Core Data        │    │ Slack-Specific  │
+│ Data (JSON)     │───▶│ Service          │───▶│ Authorization   │
+│ (Python orglib) │    │ (orgdata-core)   │    │ Service         │
 └─────────────────┘    └──────────────────┘    └─────────────────┘
-        │                       │
-        │                       │
-        ▼                       ▼
-┌─────────────────┐    ┌──────────────────┐
-│ OrgDataService  │    │ Auth Config      │
-│ (Indexing &     │    │ (YAML Rules)     │
-│  Fast Lookups)  │    │                  │
-└─────────────────┘    └──────────────────┘
+        │                       │                       │
+        │                       │                       │
+        ▼                       ▼                       ▼
+┌─────────────────┐    ┌──────────────────┐    ┌──────────────────┐
+│ Comprehensive   │    │ Fast Indexed     │    │ Auth Config      │
+│ Index Dump      │    │ Lookups          │    │ (YAML Rules)     │
+│ (comprehensive_ │    │ (O(1) queries)   │    │                  │
+│  index_dump.json)│   │                  │    │                  │
+└─────────────────┘    └──────────────────┘    └──────────────────┘
 ```
 
+### Package Structure
+
+- **`pkg/orgdata-core/`**: Reusable core package for organizational data access
+- **`pkg/orgdata/`**: Slack-specific wrapper around core package
+- **`pkg/slack/`**: Slack command handlers with authorization middleware
+
 ## Setup
 
 ### 1. Command Line Flags
@@ -46,36 +56,74 @@ Add these flags when running the CI Chat Bot:
 
 ### 2. Organizational Data Format
 
-The system expects hierarchical JSON data with this structure:
+The system now uses indexed JSON data generated by the Python `orglib` indexing system. The data structure includes pre-computed indexes for fast lookups:
 
 ```json
 {
-  "name": "Top Level Organization",
-  "group": {
-    "type": {"name": "org"},
-    "resolved_roles": [
-      {
-        "people": [
-          {
-            "uid": "employee_id",
-            "slack_uid": "U123ABC456",
-            "display_name": "John Doe",
-            "email": "[email protected]",
-            "job_title": "Senior Engineer"
-          }
-        ]
+  "metadata": {
+    "generated_at": "2025-08-13T15:00:00Z",
+    "data_version": "v1.0",
+    "total_employees": 150,
+    "total_orgs": 25,
+    "total_teams": 45
+  },
+  "lookups": {
+    "employees": {
+      "employee_uid": {
+        "uid": "employee_uid",
+        "full_name": "John Doe",
+        "email": "[email protected]",
+        "job_title": "Senior Engineer",
+        "slack_uid": "U123ABC456"
+      }
+    },
+    "teams": {
+      "team_name": {
+        "uid": "team_uid",
+        "name": "Team Name",
+        "type": "team",
+        "group": {
+          "resolved_people_uid_list": ["employee_uid1", "employee_uid2"]
+        }
       }
-    ]
+    },
+    "orgs": {
+      "org_name": {
+        "uid": "org_uid",
+        "name": "Organization Name",
+        "type": "org",
+        "group": {
+          "resolved_people_uid_list": ["employee_uid1", "employee_uid2"]
+        }
+      }
+    }
   },
-  "children": [
-    {
-      "name": "Team Name",
-      "group": {
-        "type": {"name": "team"},
-        "resolved_roles": [...]
+  "indexes": {
+    "membership": {
+      "membership_index": {
+        "employee_uid": [
+          {"name": "team_name", "type": "team"},
+          {"name": "org_name", "type": "org"}
+        ]
+      },
+      "relationship_index": {
+        "teams": {
+          "team_name": {
+            "ancestry": {
+              "orgs": ["parent_org1", "parent_org2"],
+              "pillars": ["pillar_name"],
+              "team_groups": ["team_group_name"]
+            }
+          }
+        }
+      }
+    },
+    "slack_id_mappings": {
+      "slack_uid_to_uid": {
+        "U123ABC456": "employee_uid"
       }
     }
-  ]
+  }
 }
 ```
 
@@ -155,8 +203,12 @@ rules:
 @bot whoami
 ```
 This shows:
-- Your employee information
-- Organizational memberships (teams, groups, organizations with their types)
+- Your employee information (UID, name, email, job title)
+- Complete organizational hierarchy including:
+  - Direct team memberships
+  - Organizations you belong to through team membership
+  - Pillars and team groups in your ancestry chain
+  - Full organizational context
 - Specific commands you can execute
 - How you get access to each command
 
@@ -171,6 +223,39 @@ This shows:
 1. Add authorization rule to config file
 2. Wrap command handler with authorization middleware
 
+## Package Structure
+
+### Core Package (`pkg/orgdata-core/`)
+
+The core package provides reusable organizational data functionality:
+
+- **`types.go`**: Core data structures (Employee, Team, Org, etc.)
+- **`interface.go`**: Service interface for data access
+- **`service.go`**: Implementation with fast indexed lookups
+- **`README.md`**: Comprehensive documentation
+
+### Slack Package (`pkg/orgdata/`)
+
+Slack-specific wrapper around the core package:
+
+- **`types.go`**: Type re-exports for backward compatibility
+- **`interface.go`**: Slack service wrapper with `NewIndexedOrgDataService()`
+- **`auth.go`**: Authorization service using the core package
+
+### Usage
+
+```go
+// Create the service (same as before)
+service := orgdata.NewIndexedOrgDataService()
+
+// Load data
+err := service.LoadFromFiles([]string{"comprehensive_index_dump.json"})
+
+// Use the service
+teams := service.GetTeamsForSlackID("U123ABC456")
+orgs := service.GetUserOrganizations("U123ABC456")
+```
+
 ## Integration Points
 
 ### Adding Authorization to New Commands
@@ -217,6 +302,31 @@ The system can load organizational data from:
 - Kubernetes ConfigMaps (in production)
 - Multiple files (automatically merged)
 
+## Recent Refactoring
+
+### What Changed
+
+The authorization system has been refactored to use a modern, indexed data structure:
+
+- **Before**: Used hierarchical JSON with runtime traversal
+- **After**: Uses pre-computed indexes for instant lookups
+- **Data Source**: Python `orglib` indexing system generates `comprehensive_index_dump.json`
+- **Architecture**: Clean separation between core data service and Slack-specific logic
+
+### Benefits
+
+- **Faster**: O(1) lookups instead of O(n) traversals
+- **Complete**: Shows full organizational hierarchy (teams → orgs → pillars → team groups)
+- **Maintainable**: Core package can be reused by other services
+- **Scalable**: Better performance with large organizational datasets
+
+### Migration
+
+- **No breaking changes**: All existing functionality preserved
+- **Same API**: `whoami` command works exactly as before
+- **Enhanced output**: Now shows complete organizational context
+- **Better performance**: Faster authorization checks
+
 ## Security Considerations
 
 - **Fail-open design**: Commands work if authorization service fails
@@ -226,7 +336,9 @@ The system can load organizational data from:
 
 ## Performance
 
-- **O(1) lookups**: Pre-built indexes for fast authorization checks
-- **Memory efficient**: Hierarchical data flattened into optimized structures
+- **O(1) lookups**: Pre-computed indexes enable instant authorization checks
+- **Memory efficient**: Indexed data structure optimized for fast access
 - **Minimal latency**: Authorization check adds <1ms to command execution
 - **Scalable**: Handles thousands of employees and teams efficiently
+- **Hot reload**: Data updates without service restart
+- **Modular design**: Core package can be reused by other services (REST APIs, CLI tools, etc.)