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Follow-ups from the #402 review of the single-tenant data-plane teardown. - egress_entrypoint.sh: refuse to launch mitmdump when BOT_BOTTLE_ORCHESTRATOR_URL is unset, so the fail-closed guarantee no longer rests solely on mitmproxy's errorcheck addon exiting on the addon's load-time raise. A misconfigured gateway can never come up as a bare TLS-bumping open proxy with no policy. - orchestrator/gateway.py: ensure_running() raises GatewayError on an empty orchestrator URL — a URL-less launch would only crash-loop the now-resolver-only daemons (egress raises, git-http exits 1, supervise exits 2). The env-injection branch is now unconditional. - Drop stale "single-tenant" / "reads routes.yaml" comments in gateway.py and egress_entrypoint.sh, and the /etc/egress/routes.yaml layout line in Dockerfile.gateway. - Tests: gateway fixtures supply an orchestrator URL; add a refuse-without-URL test and assert the URL env is injected. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01UoEZHDjv84ChoZbozQERhJ