feat: Portable Prompt Engineer Agent — Phase 2 Core Implementation

.github/projects/active/openspec/changes/portable-prompt-engineer-agent/README.md

@@ -1,3 +1,13 @@
+---
+file_type: documentation
+title: "Portable Prompt Engineer Agent — OpenSpec Specification"
+description: "OpenSpec specification and implementation planning for portable prompt engineering agent"
+project_type: "openspec-implementation"
+status: active
+created: "2026-08-12"
+last_updated: "2026-08-12"
+---
+
 # Portable Prompt Engineer Agent — OpenSpec Specification
 
 Portable Prompt Engineer Agent Specification & Implementation Planning
@@ -9,10 +19,52 @@ This project documents the OpenSpec specification for making the Prompt Engineer
 | Issue | Type | Purpose | Status |
 |-------|------|---------|--------|
 | [#1805](../../../../../issues/1805) | epic | Portable Prompt Engineer Agent Initiative | 🟢 Open |
-| [#1804](../../../../../pull/1804) | pull | OpenSpec Specification Phase Deliverables | 🟢 Open |
+| [#1804](../../../../../pull/1804) | pull | OpenSpec Specification Phase (Phase 1) | ✅ Merged |
+| [#1907](../../../../../pull/1907) | pull | Phase 2 Core Implementation | 🟢 Open |
 
 ## Project Contents
 
+### Phase 1 (Specification - Complete ✅)
+
 - **proposal.md** — OpenSpec proposal with problem statement, capabilities, and impact analysis
 - **design.md** — Technical design with 7 key architectural decisions, risks, and migration plan
 - **.openspec.yaml** — OpenSpec metadata and configuration
+
+### Phase 2 (Core Implementation - Complete ✅)
+
+**Skills (Documentation & Specification):**
+
+- `agents/prompt-engineer/skills/analyze-prompt.skill.md` — Clarity analysis framework (500+ lines)
+- `agents/prompt-engineer/skills/improve-prompt.skill.md` — Improvement suggestion engine (600+ lines)
+- `agents/prompt-engineer/skills/validate-prompt.skill.md` — Format validation framework (500+ lines)
+
+**Documentation:**
+
+- `agents/prompt-engineer/README.md` — Quick start guide (400+ lines)
+- `agents/prompt-engineer/API.md` — Complete API reference (1000+ lines)
+- `agents/prompt-engineer/EXAMPLES.md` — Real-world examples (800+ lines)
+
+**Configuration & Setup:**
+
+- `agents/prompt-engineer/index.js` — Module entry point with placeholder implementations
+- `agents/prompt-engineer/package.json` — NPM package configuration
+- `agents/prompt-engineer/tests/unit/analyze-prompt.test.md` — Unit test specification
+
+**Summary:**
+
+- `PHASE_2_STATUS.md` — Phase 2 completion details and Phase 3 roadmap
+
+### Phase 3 (Testing & Validation - Pending)
+
+- Implement JavaScript functions (from specifications)
+- Unit tests (80%+ coverage target)
+- Integration tests (10+ per context)
+- Multi-model validation
+- Repository-specific testing
+
+### Phase 4 (Documentation & Release - Pending)
+
+- Comprehensive documentation (ARCHITECTURE.md, CONTRIBUTING.md, TROUBLESHOOTING.md)
+- NPM packaging and distribution
+- Migration guide and backward compatibility
+- Release and announcement