# Phase 53 Summary

Status: implemented on `main`

## Goal

Close the collaborator rebuild with reliability improvements, onboarding
surfaces, `L5` publication support, and real-topic-backed E2E coverage.

## What Landed

- onboarding/runtime docs and bootstrap assets for the bounded collaborator
  workflow
- `L5` publication/output protocol support in the runtime package
- E2E CLI coverage plus three real-topic acceptance routes

## Outcome

Phase `53` is complete.
The `v1.37-v1.42` remediation chain is archived on `main`.
