# Patterns

> Project code patterns and conventions. Auto-loads when implementing, designing, verifying, or reviewing code. Provides detailed pattern definitions with code examples.

- Skill: `nklisch/patterns` (Agent Skill, multi-file: 10 files)
- Install (CLI): `npx skillmds@latest add nklisch/patterns`
- Raw SKILL.md: https://api.skillmd.com/api/skills/nklisch/patterns/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: nklisch (https://skillmd.com/u/nklisch)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/nklisch/patterns

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# Project Patterns Reference

This skill contains detailed pattern documentation for this project.
See individual pattern files for full details with code examples.

Available patterns:
- [revalidated-execution-port.md](revalidated-execution-port.md) — Bind planned operations to adapter requests, revalidate them under lock, then apply through `ExecutionPort`.
- [root-confined-filesystem-port.md](root-confined-filesystem-port.md) — Access managed descendant files through a canonical root and no-follow relative-path operations.
- [drift-checked-managed-projection-plan.md](drift-checked-managed-projection-plan.md) — Plan skill trees and MCP config as fingerprinted writes, re-observe owned projections, and fail on drift.
- [target-local-resource-state.md](target-local-resource-state.md) — Mutate lifecycle evidence on exact harness bindings and preserve unselected sibling state.
- [identity-aware-rollback.md](identity-aware-rollback.md) — Roll back only proven owned identities and report post-observed residuals when restoration is incomplete.
- [validated-wire-contract.md](validated-wire-contract.md) — Serialize domain values through private wire DTOs and rebuild them through validating constructors.
- [validated-string-newtypes.md](validated-string-newtypes.md) — Represent bounded domain text with one validated, serde-aware newtype rather than raw `String`.
- [bounded-native-process-port.md](bounded-native-process-port.md) — Resolve binaries and run direct argument vectors through the bounded runner with explicit limits.
- [isolated-native-fixture-roots.md](isolated-native-fixture-roots.md) — Exercise native and filesystem behavior only inside test-support-owned temporary roots and fake binaries.