# Split run into independent repository

## Summary

Remove the `run/` source tree from the browser repository now that the executor lives in `git@git.npc0.com:admin343/run.git`.

## Motivation

The run executor has its own repository and release boundary. Keeping the full source tree duplicated inside `browser.git` creates two owners for the same implementation and makes future commits ambiguous.

## Scope

- Remove tracked `run/` files from this repository.
- Update root governance, README, Docker Compose, local debug scripts, and structure checks to treat run as an external checkout.
- Keep platform-side run protocol/API contracts in `platform/` because browser still owns the platform control plane.

## Out of Scope

- Changing run protocol semantics.
- Moving platform API routes or frontend run management screens.
- Rewriting historical OpenSpec records that describe earlier monorepo milestones.