Fix: Use nix flake check for hooks, simplify module, remove apps

OPENCODE.md

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+# OpenCode: Future Nix Flake Improvements
+
+This document tracks potential improvements to the Nix flake configuration.
+
+## 📋 Status Overview
+
+| Category | Status |
+|---------|--------|
+| Code Quality | 🟡 In Progress |
+| CI/CD | ✅ Baseline Done |
+| Developer Experience | ⏸ Not Started |
+| Utilities | ⏸ Not Started |
+| Structure | ⏸ Not Started |
+
+## ✅ Completed
+
+### CI and Git Hooks
+- ✅ **GitHub Actions CI** - `.github/workflows/flake-check.yaml`
+- ✅ **Nix-native git hooks** - `modules/git-hooks/default.nix`
+- ✅ **Declarative hook installation** - Auto-installs on rebuild
+- ✅ **nixfmt integration** - Runs on commit and CI
+- ✅ **statix integration** - Lints for Nix antipatterns
+- ✅ **deadnix integration** - Finds dead code
+- ✅ **.editorconfig** - Unified code style
+- ✅ **Git hooks on all hosts** - Enabled on andromache, astyanax, hecuba, eetion, vm
+
+### Deduplication
+- ✅ **Created `mkNixOS` helper** - Centralized system configuration
+
+## 📋 Pending Improvements
+
+See [IMPLEMENTATION_PLAN.md](IMPLEMENTATION_PLAN.md) for detailed implementation phases.
+
+### Quick Reference
+| Priority | Task | Phase |
+|----------|-------|--------|
+| HIGH | Add statix hook | 1.1 |
+| HIGH | Add deadnix hook | 1.2 |
+| HIGH | Enable git-hooks on all hosts | 1.3 |
+| HIGH | Add CI caching | 2.1 |
+| MEDIUM | Add automated flake.lock updates | 2.2 |
+| MEDIUM | Add nil/nixd LSP | 3.1 |
+| MEDIUM | Add nix-index + comma | 3.2 |
+| MEDIUM | Add nh | 3.3 |
+| LOW | Add utility tools (nix-tree, etc.) | 4.x |
+| LOW | Migrate to flake-parts | 5.1 |
+
+## 🎯 Next Steps
+
+1. Review [IMPLEMENTATION_PLAN.md](IMPLEMENTATION_PLAN.md) for complete roadmap
+2. Start with Phase 1 (Enhanced Code Quality)
+3. Update this document as items are completed
+
+## 📚 Documentation
+
+| Document | Purpose |
+|----------|---------|
+| [IMPLEMENTATION_PLAN.md](IMPLEMENTATION_PLAN.md) | ✅ **Main plan** - Consolidated roadmap |
+| [CI_HOOKS_SUMMARY.md](CI_HOOKS_SUMMARY.md) | Current CI/hooks setup |
+| [AWESOME_NIX_PLAN.md](AWESOME_NIX_PLAN.md) | Awesome-nix integration details |
+| [DRUPOL_INFRA_ANALYSIS.md](DRUPOL_INFRA_ANALYSIS.md) | Reference patterns |
+
+## 🔗 Links
+
+- [awesome-nix](https://github.com/nix-community/awesome-nix)
+- [git-hooks.nix](https://github.com/cachix/git-hooks.nix)
+- [drupol/infra](https://github.com/drupol/infra)