Test levels: smoke e2e on PRs, the full set on e2e:full and before a release

- Every PR: lint, unit tests across the runner's cores (pytest-xdist), 16
  property walks from a seed that moves with the run number, integration
  tests, and the end-to-end smoke tests (the slice, a conversation filed
  as work, a question; `smoke` marker).
- A PR labelled e2e:full, a push to main, or a manual run: all 48 walks and
  the whole end-to-end suite. Adding e2e:full to a PR runs it; any other
  label runs nothing.
- A published release runs the full set before its image is built.
- The walk's seeds come from NISSE_WALK_SEEDS / NISSE_WALK_FIRST (48 from 0
  by default).

Measured here: the unit tier on 2 workers took 3m49s against 6-8 minutes
serially.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPQ14L3LikyefCMFBqEbKE

.gitea/workflows/ci.yml

@@ -1,4 +1,10 @@
 name: CI
+# Three levels of testing:
+#   - every PR: lint, unit tests (16 property walks), integration tests, and
+#     the smoke end-to-end tests (`smoke` marker);
+#   - a PR labelled e2e:full, a push to main and a manual run: all 48 walks
+#     and the whole end-to-end suite;
+#   - a published release: the full set again before its image (release.yml).
 on:
   # Only main on push. A PR branch is already covered by the pull_request
   # event, and running both fired two identical suites concurrently — which
@@ -7,11 +13,18 @@ on:
   push:
     branches: [main]
   pull_request:
+    # labeled: adding e2e:full runs the full set; any other label, nothing.
+    types: [opened, synchronize, reopened, labeled]
   # Manual re-run, e.g. after rotating a credential or raising a budget cap.
   workflow_dispatch:
 
+env:
+  # Full on e2e:full, and outside PRs.
+  FULL: ${{ github.event_name != 'pull_request' || contains(github.event.pull_request.labels.*.name, 'e2e:full') }}
+
 jobs:
   checks:
+    if: github.event.action != 'labeled' || github.event.label.name == 'e2e:full'
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -40,7 +53,12 @@ jobs:
         run: uv run ruff format --check .
 
       - name: Unit tests
-        run: uv run pytest -m "not integration and not e2e"
+        # Across the runner's cores (pytest-xdist). On a PR, 16 property
+        # walks from a seed that moves with the run number; all 48 otherwise.
+        env:
+          NISSE_WALK_SEEDS: ${{ env.FULL == 'true' && '48' || '16' }}
+          NISSE_WALK_FIRST: ${{ env.FULL == 'true' && '0' || github.run_number }}
+        run: uv run pytest -n auto -m "not integration and not e2e"
 
       - name: Integration tests
         # Everything but the secrets is in tests/integration/nisse-test.yaml,
@@ -58,12 +76,15 @@ jobs:
   e2e:
     # The end-to-end suite (scripts/e2e.sh): the whole agent against real
     # services, every role on a local model, so it spends nothing but keeps
-    # the RTX 4090 busy for ~25 minutes. On PRs only, and only after the
-    # checks pass: a PR that's red already doesn't spend the GPU. There is
-    # one runner and Gitea doesn't honour cancel-in-progress, so a run a
-    # newer push supersedes holds the runner until it's cancelled by hand.
-    # Locally, run only what you're writing (-k) or diagnosing (--lf).
-    if: github.event_name != 'push'
+    # the RTX 4090 busy: ~10 minutes for the smoke tests, ~25+ for all. On
+    # PRs and manual runs, and only after the checks pass: a PR that's red
+    # already doesn't spend the GPU. There is one runner and Gitea doesn't
+    # honour cancel-in-progress, so a run a newer push supersedes holds the
+    # runner until it's cancelled by hand. Locally, run only what you're
+    # writing (-k) or diagnosing (--lf).
+    if: >-
+      github.event_name != 'push'
+      && (github.event.action != 'labeled' || github.event.label.name == 'e2e:full')
     needs: checks
     runs-on: ubuntu-latest
     timeout-minutes: 90
@@ -93,4 +114,9 @@ jobs:
           NISSE_GITEA_TOKEN: ${{ secrets.NISSE_GITEA_TOKEN }}
           NISSE_OPERATOR_TOKEN: ${{ secrets.NISSE_OPERATOR_TOKEN }}
           NISSE_E2E_RUNS: /tmp/nisse-e2e-runs
-        run: scripts/e2e.sh --local -v
+        run: |
+          if [ "$FULL" = true ]; then
+            scripts/e2e.sh --local -v
+          else
+            scripts/e2e.sh --local -v -m "e2e and smoke"
+          fi