magic-context

Magic Context is a plugin for coding agent harnesses, currently OpenCode, Pi and OMP. It replaces the host's built-in compaction with its own context management so the agent does not pause to compact and drop what it knew mid-task.

A background historian compresses older history into tiered summaries with importance scores and lifts durable decisions, constraints and conventions into project memory. Separate dreamer agents run later to verify memories against the codebase and remove duplicates or stale entries, and relevant memories are injected each turn. The agent can also search memories, past conversations and git history.

Setup is a wizard (`npx @cortexkit/magic-context@latest setup`) that detects installed harnesses, registers the plugin and turns off built-in compaction. A historian model must be configured; the README notes it can be a cheaper or local model than the main agent.