Add OpenABTest draft experiment and accounting contracts (#180)

packages/schemas/fixtures/openabtest/chovy-manifest.json

@@ -0,0 +1,69 @@
+{
+  "openabtest": "0.1-draft",
+  "id": "chovy-signup-discount-v1",
+  "revision": 1,
+  "name": "Chovy referred purchase discount",
+  "state": "draft",
+  "cohort": {
+    "id": "eligible-referred-customers",
+    "eligibilityRule": "Server-verified eligible referral; exclude self-referrals and invalid attribution. Every referred purchase qualifies.",
+    "purchaseScope": "all-referred-purchases"
+  },
+  "assignment": {
+    "unit": "user",
+    "authority": "server",
+    "keyVersion": "1",
+    "algorithm": "hmac-sha256-persisted-v1",
+    "persistence": "sticky"
+  },
+  "variants": [
+    {
+      "id": "signup-5",
+      "weight": 1,
+      "parameters": {
+        "discountBps": 500
+      }
+    },
+    {
+      "id": "signup-10",
+      "weight": 1,
+      "parameters": {
+        "discountBps": 1000
+      }
+    },
+    {
+      "id": "signup-20",
+      "weight": 1,
+      "parameters": {
+        "discountBps": 2000
+      }
+    }
+  ],
+  "window": {
+    "startsAt": "2026-09-14T00:00:00Z",
+    "endsAt": "2026-10-14T00:00:00Z"
+  },
+  "metrics": {
+    "primary": "retained-profit-per-eligible-visitor",
+    "denominator": "unique-eligible-participants",
+    "conversion": "unique-participants-with-confirmed-purchase",
+    "profit": "reconciled-net-retained-profit",
+    "minimumEligiblePerVariant": 100,
+    "minimumObservationSeconds": 604800,
+    "winnerPolicy": "manual-review"
+  },
+  "guardrails": {
+    "preserveAcceptedOffers": true,
+    "preserveAccruedCommissions": true,
+    "requireReconciledCostsForPayout": true,
+    "onBreach": "pause-new-assignments"
+  },
+  "economics": {
+    "currency": "USD",
+    "minorUnitExponent": 2,
+    "unit": "agent-hour",
+    "listUnitPriceMinor": 40000,
+    "modeledUnitCostMinor": 10000,
+    "minimumRetainedUnitProfitMinor": 5000
+  }
+}