feat: Add unified agent integration with Prometheus, Every Code, and Dexto

This commit adds comprehensive integration of three major AI agent platforms:

## MCP Servers (3)
- Prometheus MCP: Knowledge graph code reasoning with AST analysis
- Every Code MCP: Fast terminal-based coding agent with Auto Drive
- Dexto MCP: Agent harness with orchestration and session management

## Claude Code Skills (6)
- /agent-plan: Generate implementation plans
- /agent-fix-bug: Fix bugs end-to-end
- /agent-solve: Solve complex problems
- /agent-review: Review code quality
- /agent-context: Get code context
- /agent-orchestrate: Orchestrate workflows

## Ralph Auto-Integration
- Pattern-based auto-trigger for all three platforms
- Intelligent backend selection
- Multi-platform coordination
- Configuration in ralph/ralph.yml

## Documentation
- Complete integration guides
- Ralph auto-integration documentation
- Setup scripts
- Usage examples

Co-Authored-By: Claude <noreply@anthropic.com>

skills/agents/plan.md

@@ -0,0 +1,57 @@
+# Agent: Plan
+
+Generate implementation plans using Every Code's planning capabilities with Prometheus context.
+
+## Usage
+
+```
+/agent-plan "Implement user authentication with JWT tokens"
+```
+
+## Description
+
+The `/agent-plan` skill generates detailed implementation plans by:
+1. Using Every Code's `/plan` command for structured planning
+2. Augmenting with Prometheus knowledge graph for context
+3. Providing step-by-step implementation guidance
+
+## Examples
+
+### Plan a feature
+```
+/agent-plan "Add dark mode with system preference detection"
+```
+
+### Plan with constraints
+```
+/agent-plan "Refactor the user service to use GraphQL
+Scope: backend only, no frontend changes"
+```
+
+### Plan database migration
+```
+/agent-plan "Migrate from PostgreSQL to MySQL for the users table"
+```
+
+## Backends
+
+- **Primary**: Every Code (/plan command)
+- **Enhancement**: Prometheus (context from similar code)
+
+## Workflow
+
+1. Parse your request and identify key requirements
+2. Query Prometheus for similar existing code patterns
+3. Generate implementation plan using Every Code
+4. Present plan with:
+   - Architecture overview
+   - Step-by-step tasks
+   - Files to create/modify
+   - Dependencies to add
+   - Testing considerations
+
+## Follow-up
+
+After planning, use:
+- `/agent-implement` - Execute the plan
+- `/agent-context` - Get more context on specific files