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* fix: intercept process.stdout.write to prevent JSON-RPC corruption in stdio mode (#628, #627, #567) Console method suppression alone was insufficient — native modules, n8n packages, and third-party code can call process.stdout.write() directly, leaking debug output (refCount, dbPath, clientVersion, protocolVersion, etc.) into the MCP JSON-RPC stream. Added stdout write interceptor that only allows JSON-RPC messages through (objects containing "jsonrpc" field). All other writes are redirected to stderr. This fixes the flood of "Unexpected token is not valid JSON" warnings on every new Claude Desktop chat. Conceived by Romuald Członkowski - https://www.aiadvisors.pl/en Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> * ci: add Docker Hub login to fix buildx bootstrap rate limiting GitHub-hosted runners hit Docker Hub anonymous pull limits when setup-buildx-action pulls moby/buildkit. Add docker/login-action for Docker Hub before setup-buildx-action in all 4 workflows: docker-build.yml, docker-build-fast.yml, docker-build-n8n.yml, release.yml. Uses DOCKERHUB_USERNAME and DOCKERHUB_TOKEN repository secrets. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>