opchain
skills that ship.
If you've ever tried to build something real with Claude and watched it lose the plot between chats — forgetting your spec, redesigning what it already designed, repeating questions it asked an hour ago — opchain is what you've been looking for.
A set of skills plus a checkpoint protocol — native in Claude Code, and now in Codex or any MCP agent via a hosted endpoint. Each skill specializes in one piece of the puzzle (discovery, spec, design, build, audit, ship, monitor, migrate, scale). At the beginning of the next session, Claude reads them back to pick up right where you left off. A central orchestrator routes between them so you never have to think about which skill to call.
Install them, trigger by name, keep going. No API keys. No SaaS. No vendor lock-in — every skill is a single Markdown file.
Concept → shipped, in one chat
Idea → deployed, one chat
resources
References and trust signals you'd otherwise have to scroll all the way to the footer to find.
Skills
Read the source. Every skill is a single Markdown file you can audit, fork, and rewire.
read the files ›Glossary
Plain-English definitions for every opchain term — checkpoint, tri-agent, audit gate.
read ›How it's built
opchain.dev is itself built with opchain. Every commit ran through the gates.
read ›Security
Threat model, dependency posture, secret handling — what we actually do.
read ›