Open source tools, shipped in public. No API keys, no lock-in. New ones land here as they leave the lab.
You work in more than one coding agent, and every switch normally costs you the conversation: copy a summary, hunt a session id, start over. context-bridge connects the native sessions of Claude Code, Codex, Grok and Antigravity. Each agent keeps its own real session; the bridge computes what the other one is missing and delivers exactly that.
You already have an agent defined for one coding CLI, a plain .claude/agents/*.md file. multi-agent runs that same agent on other model CLIs: grok, codex, claude. Each target executes it natively through its own agent runtime, no API keys and no re-implementation. When independent models converge on a finding you get confidence. When they diverge you get coverage.