# State Management

The Aegis framework implements a robust state management system across all operation patterns. This document explains how state is tracked, updated, and maintained throughout operations.

## State System Overview

```yaml
# State Management Definition
state:
  types:
    framework:    # Framework state
      file: current_state.md
      critical: true
    
    session:     # Session state
      file: sessions/*.md
      critical: false
    
    task:        # Task state
      file: tasks/*/*.md
      critical: true
    
    memory:      # Memory state
      file: .context/*
      critical: true
```

## State Categories

1.  **Framework State**

    * System readiness
    * Configuration status
    * Resource availability
    * Operation mode
    * Framework version

    ```yaml
    framework_state:
      components:
        - system:
            ready: boolean
            mode: [normal, maintenance]
        
        - config:
            loaded: boolean
            valid: boolean
        
        - resources:
            available: list
            status: map
    ```
2.  **Session State**

    * Active sessions
    * Current focus
    * Recent operations
    * Pending changes
    * Session history

    ```yaml
    session_state:
      components:
        - active:
            id: string
            start: timestamp
        
        - focus:
            task: string
            context: string
        
        - history:
            operations: list
            changes: list
    ```
3.  **Task State**

    * Task status
    * Progress tracking
    * Dependencies
    * Blockers
    * Assignments

    ```yaml
    task_state:
      components:
        - status:
            current: string
            progress: integer
        
        - tracking:
            started: timestamp
            updated: timestamp
        
        - relations:
            depends_on: list
            blocks: list
    ```
4.  **Memory State**

    * Memory types
    * Content status
    * Update tracking
    * Reference status
    * Cache state

    ```yaml
    memory_state:
      components:
        - types:
            loaded: list
            valid: boolean
        
        - content:
            updated: timestamp
            valid: boolean
        
        - references:
            resolved: boolean
            circular: boolean
    ```

## State Operations

1.  **Reading State**

    ```yaml
    read_state:
      operations:
        - load: {type: state_type}
        - validate: {content: true}
        - process: {refs: true}
    ```
2.  **Updating State**

    ```yaml
    update_state:
      operations:
        - validate: {changes: true}
        - apply: {updates: atomic}
        - verify: {result: true}
    ```
3.  **Maintaining State**

    ```yaml
    maintain_state:
      operations:
        - monitor: {changes: true}
        - clean: {invalid: true}
        - optimize: {as_needed: true}
    ```

## State Transitions

1.  **Task Transitions**

    ```yaml
    task_transitions:
      allowed:
        - planned: [active]
        - active: [completed, hold]
        - hold: [active]
        - completed: []
    ```
2.  **Session Transitions**

    ```yaml
    session_transitions:
      allowed:
        - init: [active]
        - active: [paused, ended]
        - paused: [active, ended]
        - ended: []
    ```
3.  **Memory Transitions**

    ```yaml
    memory_transitions:
      allowed:
        - loading: [ready]
        - ready: [updating]
        - updating: [ready, error]
        - error: [ready]
    ```

## State Validation

1.  **Consistency Checks**

    ```yaml
    consistency_checks:
      rules:
        - references: {valid: true}
        - dependencies: {resolved: true}
        - integrity: {maintained: true}
    ```
2.  **State Rules**

    ```yaml
    state_rules:
      enforce:
        - transitions: {valid: true}
        - updates: {atomic: true}
        - history: {tracked: true}
    ```
3.  **Recovery Rules**

    ```yaml
    recovery_rules:
      steps:
        - detect: {issues: true}
        - backup: {current: true}
        - repair: {problems: true}
    ```

## Best Practices

1. **State Definition**
   * Clear structure
   * Defined transitions
   * Validation rules
   * Recovery procedures
2. **State Updates**
   * Atomic operations
   * Validation first
   * Backup before
   * Verify after
3. **State Maintenance**
   * Regular cleanup
   * Consistency checks
   * Performance monitoring
   * Issue prevention
4. **State Recovery**
   * Backup strategy
   * Recovery steps
   * Validation process
   * Prevention measures

## Common Patterns

1.  **Update-Verify Pattern**

    ```yaml
    update_verify:
      steps:
        - validate: {pre: true}
        - update: {atomic: true}
        - verify: {post: true}
        - rollback: {if: failed}
    ```
2.  **Monitor-Maintain Pattern**

    ```yaml
    monitor_maintain:
      steps:
        - watch: {changes: true}
        - validate: {consistency: true}
        - clean: {as_needed: true}
        - optimize: {periodic: true}
    ```
3.  **Backup-Recover Pattern**

    ```yaml
    backup_recover:
      steps:
        - backup: {before: change}
        - attempt: {update: true}
        - verify: {success: true}
        - restore: {if: needed}
    ```

## Integration Points

1.  **Operation Integration**

    ```yaml
    operation_integration:
      points:
        - pre_op: {check: state}
        - during_op: {track: changes}
        - post_op: {update: state}
    ```
2.  **Memory Integration**

    ```yaml
    memory_integration:
      points:
        - load: {validate: state}
        - update: {track: changes}
        - save: {verify: state}
    ```
3.  **Error Integration**

    ```yaml
    error_integration:
      points:
        - detect: {state: issues}
        - handle: {state: errors}
        - recover: {state: valid}
    ```

## Related Documentation

* [Pattern System](../patterns)
* [Framework Structure](../../getting-started/structure)
* [Memory Types](memory_types)
* [Error Handling](../error-handling/error_handling)
