Main Sequence Documentation

Main Sequence is a platform for building and operating CodeRepositories, jobs, APIs, Agents, and reusable platform resources. The Python SDK provides the authentication, client models, CLI workflows, Git-native source context, observability, instrumentation, and scaffold utilities used by those workflows.

MetaTables is an independent domain package, installed as mainsequence-metatable and imported as metatables. The SDK documentation keeps the extraction history and migration boundary, while current table implementation guidance belongs to that package.

Choose A Reading Path

Knowledge

Use the knowledge guides for platform concepts and end-to-end behavior:

• Authentication
• Git source and Environment context
• Users and Access
• Constants and Secrets
• Scheduling Jobs
• Artifacts
• Resource releases
• FastAPI request user context
• Server caller assertions

CLI

Use the CLI overview for authentication, Agents, CodeRepositories, jobs and runs, images, resources and releases, access policies, scaffold maintenance, Docker, and local-development commands. The installed mainsequence --help output is authoritative for the installed SDK version.

Reference

Use the generated API reference when you need exact Python classes, methods, parameters, or return types.

Architecture And Migrations

• Architecture decision index
• ADR 0034: Extract the MetaTables Python API
• MetaTables SDK removal
• Independent Git and Environment context
• CodeRepository ontology hard cut
• Streamlit dashboard support removal

The beginner tutorial is maintained in its own self-contained CodeRepository. This repository remains the source of truth for SDK APIs, CLI behavior, architecture decisions, and generated reference documentation.