DTOs & contracts — Zod 4 schemas paired with z.infer types, enum-backed closed sets, input/output/read projections.

Agent Skill for automating Microsoft Excel via MCP Server — 225 operations including Power Query, DAX, PivotTables, Charts, and more

HTTP controllers in a TypeScript + DDD API — routes, guards, Zod validation, use-case orchestration, Result→HTTP mapping.

Domain entities — Entity base, create/tryCreate with Result.combine, VO normalization, state transitions via cloneWith.

Read-side CQRS queries — *Query ports, find-* read use cases, DTO projections, pagination/filters, Prisma/InMemory.

Value objects — ValueObject + Result, closed-set + composite VOs, tryCreate/create, normalization.

Image generation skill for Claude Code, Codex, OpenClaw and any SKILL.md-compatible LLM agent. Wraps api.letmego.top (GPT-Image-2).

Agent skill for P2P file transfer — send files between agents and humans with zero configuration

Reproducible lockfiles, verification, diff, audit, and tests for Agent Skills

AI context and rules sync CLI for Claude.md, Claude Code, Cursor, and Copilot instructions, with privacy-safe context receipts that prove what memory, tools, skills, compactions, and security findings crossed agent boundaries without logging raw content.

Review what an Agent Skill can newly do, not just what bytes changed.