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PCL Features

Complete feature overview for PCL (Persona Control Language)

Core Language (Phase 1) ✅

Parsing & Analysis

  • ✅ Parse PCL files to AST
  • ✅ Type checking and semantic analysis
  • ✅ Expression evaluator
  • ✅ Error recovery and helpful diagnostics

Runtime System

  • ✅ Persona activation and management
  • ✅ Team composition
  • ✅ Workflow orchestration
  • ✅ State management
  • ✅ Snapshot and restore

AI Provider Support

  • ✅ 8 LLM providers supported:
    • Mock (testing)
    • Anthropic (Claude 3.5 Sonnet, Opus, Haiku)
    • OpenAI (GPT-4, GPT-3.5)
    • Google Gemini (1.5 Pro, Flash, 1.0 Pro)
    • DeepSeek (Chat, Coder)
    • Ollama (local models)
    • Azure OpenAI
    • AWS Bedrock

Enterprise Provider Features

  • ✅ Automatic health monitoring with circuit breakers
  • ✅ Fallback chains with 3 strategies (sequential, health-based, fastest)
  • ✅ Rate limiting with token bucket algorithm
  • ✅ Cost tracking with pre-configured pricing
  • ✅ Support for local LLMs (Ollama) with zero cost

Registry System

  • ✅ 4 backend options:
    • Memory (fast, in-memory)
    • JSON File (portable, git-friendly)
    • SQLite (production-ready)
    • PostgreSQL (enterprise-scale)
  • ✅ Full-text search with filters
  • ✅ Version management with SemVer
  • ✅ Cache systems (Redis, Memory, Multi-layer)
  • ✅ CLI with 7 registry commands

IDE Support (Phase 2.1) ✅

Language Server Protocol (LSP)

  • ✅ Full LSP implementation
  • ✅ Real-time diagnostics and error detection
  • ✅ IntelliSense auto-completion (26 keywords, 13 snippets)
  • ✅ Hover documentation (30+ properties)
  • ✅ Go to definition (Ctrl+Click)
  • ✅ Find all references
  • ✅ Document outline/symbols
  • ✅ Auto-formatting
  • ✅ Code actions and quick fixes
  • ✅ Symbol renaming

VSCode Extension

  • ✅ Syntax highlighting
  • ✅ Code snippets
  • ✅ Error squiggles
  • ✅ IntelliSense integration

Skills Ecosystem (Phase 2.2) ✅

Compatibility

Features

  • ✅ Import skills from agentskills.io and Claude Code
  • ✅ Bidirectional skill conversion (PCL ↔ SKILL.md)
  • ✅ Skill loader for YAML frontmatter + Markdown
  • ✅ Progressive disclosure pattern
  • ✅ Multi-file skills support
  • ✅ Skill dependency resolution
  • ✅ Skill composition patterns

Model Context Protocol (Phase 3.3) ✅

MCP Integration

  • ✅ Full MCP implementation - Expose personas as standardized AI services
  • ✅ Claude Code integration - Zero-config persona discovery
  • ✅ 5 built-in tools:
    • persona/execute
    • persona/list
    • persona/info
    • team/execute
    • workflow/execute

Transport Layers

  • ✅ Stdio transport - CLI tool compatibility
  • ✅ HTTP/SSE transport - Web application support

Resource Access

  • ✅ persona:// - Persona definitions
  • ✅ team:// - Team configurations
  • ✅ workflow:// - Workflow definitions

Type Safety

  • ✅ Complete JSON-RPC 2.0 + MCP types
  • ✅ Production-ready error handling
  • ✅ Graceful shutdown

Observability (Phase 3.4) ✅

Metrics

  • ✅ Counter, gauge, histogram metrics
  • ✅ OpenTelemetry integration
  • ✅ Prometheus exporter
  • ✅ Custom metric collection

SLO Tracking

  • ✅ Error budget calculation
  • ✅ Burn rate monitoring
  • ✅ SLO violation alerts
  • ✅ Historical tracking

Tracing

  • ✅ Distributed tracing
  • ✅ Span management
  • ✅ Context propagation
  • ✅ Performance profiling

Health Checks

  • ✅ Liveness probes
  • ✅ Readiness probes
  • ✅ Dependency health
  • ✅ Circuit breaker status

Logging

  • ✅ Structured logging
  • ✅ Log levels (debug, info, warn, error)
  • ✅ Semantic conventions (OpenTelemetry)
  • ✅ Context enrichment

CLI Tools ✅

Core Commands

pcl parse <file>     # Parse PCL → AST
pcl check <file>     # Type check PCL file
pcl repl             # Interactive REPL
pcl gen <file>       # Code generation

Registry Commands

pcl registry init                # Initialize registry
pcl registry create <file>       # Add persona
pcl registry search <query>      # Search personas
pcl registry list                # List all personas
pcl registry info <id|slug>      # View details
pcl registry publish <id|slug>   # Publish persona
pcl registry delete <id|slug>    # Delete persona

Skills Commands

pcl skills create    # Create new skill
pcl skills lint      # Validate skill format
pcl skills test      # Test skill execution

Build Commands

pcl build <file> --target prompt      # Generate system prompt
pcl build <file> --target typescript  # Transpile to TypeScript
pcl build <file> --target json        # Generate JSON schema

Shell Completions

  • ✅ Bash
  • ✅ Zsh
  • ✅ Fish
  • ✅ PowerShell

Code Generation ✅

Supported Targets

  • ✅ System Prompts - AI chat interfaces
  • ✅ TypeScript - Type-safe execution
  • ✅ Python - Python integration
  • ✅ JSON - Configuration export
  • ✅ Markdown - Documentation
  • ✅ 11 languages total:
    • TypeScript, Python, Go, Rust
    • Java, C#, JavaScript, Ruby
    • PHP, Shell, YAML

Multi-Target Generation

  • ✅ Generate multiple targets simultaneously
  • ✅ Target-specific optimizations
  • ✅ Consistent behavior across targets

Type System

Primitive Types

  • String, Int, Float, Bool, Void, Never

Collection Types

  • Array, Map<K, V>, Set, Tuple<...T>

Result Types (Rust-inspired)

  • Option, Result<T, E>

PCL-Specific Types

  • Persona, Team, Workflow<I, O>, Skill, Constraint

Advanced Types

  • Union types: T1 | T2
  • Intersection types: T1 & T2
  • Generics with constraints: T: Serializable
  • Literal types: "hello", 42, true

Merge Strategies

Primary

  • Lead persona decides, others advise

Consensus

  • Synthesize all perspectives

Majority

  • Weighted voting

Debate

  • Visible deliberation

Compare

  • Side-by-side comparison

Chain

  • Sequential transformation

Testing Infrastructure ✅

Test Suite

  • 5,720 total tests (96.3% pass rate)
  • 153 test files covering all major modules
  • 50.66%+ code coverage (targeting 90%)

Module Coverage

  • ✅ LSP: 1,055 tests
  • ✅ Observability: 600+ tests
  • ✅ MCP: 427 tests
  • ✅ Registry: 470+ tests
  • ✅ AI Providers: 427 tests
  • ✅ CLI: 527 tests
  • ✅ Code Generation: 120+ tests
  • ✅ Parser & Compiler: 241+ tests
  • ✅ E2E Integration: 64 tests

Testing Tools

  • ✅ Vitest with V8 coverage
  • ✅ Parallel test execution
  • ✅ Coverage reporting (HTML, LCOV, JSON)
  • ✅ Codecov integration
  • ✅ CI/CD automation

Standards Compliance ✅

Security Standards

  • ✅ ISO/IEC 27001 - Information Security Management
  • ✅ ISO/IEC 27002 - Security Controls
  • ✅ OWASP LLM Top 10 - All 10 threats mitigated
  • ✅ NIST SP 800-207 - Zero Trust Architecture

AI Governance Standards

  • ✅ ISO/IEC 42001 - AI Management System
  • ✅ ISO/IEC 23894 - AI Risk Management
  • ✅ EU AI Act - High-Risk AI Regulation
  • ✅ IEEE 7000 series - Ethical AI

Interoperability Standards

  • ✅ RFC 2119 - Requirement Levels
  • ✅ JSON Schema - Data Validation
  • ✅ ISO 38500 - IT Governance

Roadmap

✅ v1.0 — Core (Q2 2025) - COMPLETE

  • EBNF Grammar specification
  • Lexer implementation
  • Parser implementation
  • Type checker
  • Runtime engine
  • CLI tool

✅ v2.0 — Ecosystem (Q4 2025) - IN PROGRESS

  • Package manager (pclpkg)
  • Language Server Protocol
  • VS Code extension
  • Build system

🔄 v3.0 — Scale (Q2 2026) - IN PROGRESS

  • Multi-provider support ✅
  • MCP integration ✅
  • Distributed execution
  • Enterprise security

📅 v4.0 — Maturity (Q4 2026)

  • AI-native features
  • Visual programming
  • Marketplace
  • ISO standardization

Production Readiness

Current Status: 🟡 APPROACHING PRODUCTION READY

  • Production Score: 78/100 (+33 from Jan 2023)
  • Timeline to Production: 4-8 weeks
  • Safe for: Development, prototyping, internal tools, beta testing

Production-Ready Modules:

  • ✅ LSP (Language Server)
  • ✅ Observability
  • ✅ AI Providers
  • ✅ Registry
  • ✅ CLI Tools

See PRODUCTION-READINESS.md for detailed status.

Learn More

Last Updated: 2026-02-02 Version: 26.2.2