Overplane vs Substructure

Overplane is an AI code generation and build system that verifies and safely compiles plain-language specs into working, verified code. Container-sandboxed agents,...

subs is an agent harness for the cloud. It runs an unprivileged agent loop with no system access. It uses MCP servers for tools. It can run locally or as a client and server.

About Overplane

Overplane is an AI code generation and build system that verifies and safely compiles plain-language specs into working, verified code. Container-sandboxed agents, replayable builds, and multi-agent support. Overplane combines popular AI coding agents with containers, spec-driven development, and formal verification to create a safer and more reliable AI coding workflow. Overplane keeps the speed and fixes the rest in three moves: contain the agent, wrap it in a real build system, and verify the plan before the code exists.

About Substructure

subs is an agent harness for the cloud. It runs an unprivileged agent loop with no system access. It uses MCP servers for tools. It can run locally or as a client and server. Create the project from the file, then give it your LLM key. Configure the engine to send a webhook to your system and take complete control over the agent loop and Slack agent behavior. You handle a webhook, customizing just the steps you care about.