feat(harness): unified harness surface — foundation (span derivation, delivery adapters, emitter)

.github/workflows/harness-integration.yml

@@ -0,0 +1,40 @@
+name: Harness Integration
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    paths:
+      - "src/agentex/lib/core/harness/**"
+      - "src/agentex/lib/adk/_modules/**"
+      - ".github/workflows/harness-integration.yml"
+
+jobs:
+  conformance:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@d4b2f3b6ecc6e67c4457f6d3e41ec42d3d0fcb86 # v5.4.2
+        with:
+          version: '0.10.2'
+
+      - name: Bootstrap
+        run: ./scripts/bootstrap
+
+      # Defer to scripts/test so the harness suite runs under the exact same
+      # invocation as the main CI test job: DEFER_PYDANTIC_BUILD=false and
+      # `uv run --isolated --all-packages --all-extras pytest`, across the
+      # min/max supported Python versions. Running `uv run pytest` directly
+      # would risk an all-extras-only dep passing locally but failing in CI.
+      - name: Conformance suite
+        run: ./scripts/test tests/lib/core/harness/ -v
+
+  # Live integration matrix (harness x {sync, async, temporal}) is added per-harness
+  # in the migration plans. Placeholder job keeps the workflow valid until then.
+  live-matrix:
+    runs-on: ubuntu-latest
+    if: false  # enabled once the first harness's test agents land
+    steps:
+      - run: echo "populated by migration PRs"  # TODO(harness-migration): enable per-harness; see docs/superpowers/plans migration PRs 4-8