chore: install openagent opencode

Signed-off-by: Dmytro Stanchiev <git@dmytros.dev>

.opencode/context/development/principles/navigation.md

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+<!-- Context: development/navigation | Priority: critical | Version: 1.0 | Updated: 2026-02-15 -->
+
+# Development Principles Navigation
+
+**Purpose**: Universal development principles (language-agnostic)
+
+---
+
+## Files
+
+| File | Topic | Priority | Load When |
+|------|-------|----------|-----------|
+| `clean-code.md` | Clean code practices | ⭐⭐⭐⭐ | Writing any code |
+| `api-design.md` | API design principles | ⭐⭐⭐⭐ | Designing APIs |
+
+---
+
+## Loading Strategy
+
+**For general development**:
+1. Load `clean-code.md` (high)
+2. Also load: `../../core/standards/code-quality.md` (critical)
+
+**For API development**:
+1. Load `api-design.md` (high)
+2. Also load: `../../core/standards/code-quality.md` (critical)
+
+---
+
+## Scope
+
+**This directory**: Development-specific principles
+**Core standards**: Universal standards (all projects, all languages)
+
+| Location | Scope | Examples |
+|----------|-------|----------|
+| `core/standards/` | **Universal** (all projects) | Code quality, testing, docs, security |
+| `development/principles/` | **Development-specific** | Clean code, API design, error handling |
+
+---
+
+## Related
+
+- **Core Standards** → `../../core/standards/navigation.md`
+- **Backend Patterns** → `../backend-navigation.md`
+- **Frontend Patterns** → `../ui-navigation.md`