- Real server-side pagination (platform/api/src/pagination.js) on the audit
log (was a flat LIMIT 200), student attempt history (was LIMIT 100), and
assessment session history (was fully unbounded - the one genuine growth
risk found). Frontend updated (AuditView, AssessmentsView, StudentsView).
- Admission control: resource-policy.yaml's new (disabled-by-default)
admission_control.max_concurrent_labs, checked before touching Docker at
all, returns a clean 503 CAPACITY_EXCEEDED instead of failing mid-provision.
Relayed as a clean student-facing message, never a raw 500. New
GET /capacity endpoint feeds the instructor dashboard.
- cohort_instructors.role_in_cohort (existed since Phase 2B, never read) is
now enforced: teacher vs viewer, rbac.js's
requireCohortWriteAccess/requireStudentCohortWriteAccess.
- GET /api/version - app version, deployed Git SHA, latest migration as a
schema-version stand-in.
- Structured assessment authoring UI (AssessmentsView.jsx's PoolSpecEditor)
replaces the raw-JSON pool_spec textarea, backed by a new
GET /api/admin/scenario-catalog endpoint. Owner-only raw-JSON fallback
remains for anything the structured editor doesn't cover.
- NEEDS_ATTENTION_FAIL_THRESHOLD/STALE_DAYS moved to env-var configuration.
Full regression suite (e2e-phase2a/2b/3a/3b, 67/67) re-run clean after
these changes; frontend production build confirmed clean.
Adds platform/lab-router/ — a narrow service that runs on the Lab Host,
authenticates the Gateway via mTLS, and resolves an opaque routing token to
a local container purely from Docker label state (no Postgres access, no
callback to the Provisioner). Replaces the Gateway's env.internal_ip
assumption (only valid when Gateway and Lab share a Docker daemon) with a
data-driven direct/router decision per lab_host
(lab_hosts.routing_mode/router_endpoint, migration 004), resolved in one
place (platform/gateway/src/lab-endpoint.js's labTarget()) that every
proxy/fetch call site in server.js now goes through.
Extends the existing Docker TLS CA (infra/scripts/docker-tls/generate-docker-tls.sh)
with a second mTLS leaf pair (router-server/gateway-client) for this new
data-plane connection, deployed by the docker-tls Ansible role into a
separate directory from the control-plane pair. Firewall
(rn-lab-host-01.rules) replaces the old speculative wide port-range
allowance with one narrow rule: platform_ip -> the Router's port only.
dev-local stays routing_mode: direct — zero behavior change for local dev,
confirmed by the full existing regression suite passing unmodified.
common/firewall/docker-tls/platform/lab-host/monitoring-agent/backup roles,
orchestrated by site.yml with the ordering that matters (firewall/TLS land
before the services that depend on them). Ansible Vault for secrets, no new
tool introduced for this project's modest secret surface. Explicit
dev/staging/production environment separation, no secrets committed
(.gitignore covers vault plaintext, TLS keys, Terraform state, *.env).
Validated: ansible-playbook --syntax-check clean.
ced4568