Hard batch G0022-G0026: 5/5 accepted; budget floor, CDS checks, mutation check

- generator: budget floor (2x oracle activations, 3x calls), static checks for CDS
  $parameters and UNION annotation
- harness/mutation.py: deterministic mutants of the reference; hidden tests must fail
- G0022 revalidated with harness fixes: oracle 100, null 0
- results in docs/faz1-tasarim.md 11f

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tasks_gen/eval/G0022/task.json

@@ -0,0 +1,107 @@
+{
+  "id": "G0022",
+  "category": "D",
+  "object_type": "CLAS",
+  "difficulty": 2,
+  "release_target": "v816",
+  "expected_outcome": "implement",
+  "budget": {
+    "max_tool_calls": 45,
+    "max_activations": 14
+  },
+  "seed": [
+    {
+      "type": "INTF",
+      "name": "{{P}}IF_EXPENSE_CLAIM",
+      "file": "seed/if_expense_claim.intf.abap",
+      "description": "Types for an expense claim"
+    },
+    {
+      "type": "CLAS",
+      "name": "{{P}}CX_CLAIM_ERROR",
+      "file": "seed/cx_claim_error.clas.abap",
+      "description": "Base exception that carries a message text"
+    }
+  ],
+  "contract": [
+    {
+      "type": "CLAS",
+      "name": "{{P}}CX_CLAIM_AMOUNT"
+    },
+    {
+      "type": "CLAS",
+      "name": "{{P}}CX_CLAIM_CURRENCY"
+    },
+    {
+      "type": "CLAS",
+      "name": "{{P}}CX_CLAIM_DATE"
+    },
+    {
+      "type": "CLAS",
+      "name": "{{P}}CX_CLAIM_RECEIPT"
+    },
+    {
+      "type": "CLAS",
+      "name": "{{P}}CX_CLAIM_COSTCENTER"
+    },
+    {
+      "type": "CLAS",
+      "name": "{{P}}EXPENSE_VALIDATOR"
+    }
+  ],
+  "out_of_scope": [
+    "{{P}}IF_EXPENSE_CLAIM",
+    "{{P}}CX_CLAIM_ERROR"
+  ],
+  "hidden_tests": [
+    {
+      "type": "CLAS",
+      "name": "{{P}}D01_HIDDEN",
+      "file": "hidden/d01_hidden.clas.abap",
+      "description": "Hidden tests for the expense claim validation"
+    }
+  ],
+  "reference": [
+    {
+      "type": "CLAS",
+      "name": "{{P}}CX_CLAIM_AMOUNT",
+      "file": "reference/cx_claim_amount.clas.abap",
+      "description": "Exception for a non positive amount"
+    },
+    {
+      "type": "CLAS",
+      "name": "{{P}}CX_CLAIM_CURRENCY",
+      "file": "reference/cx_claim_currency.clas.abap",
+      "description": "Exception for an unsupported currency"
+    },
+    {
+      "type": "CLAS",
+      "name": "{{P}}CX_CLAIM_DATE",
+      "file": "reference/cx_claim_date.clas.abap",
+      "description": "Exception for a claim date in the future"
+    },
+    {
+      "type": "CLAS",
+      "name": "{{P}}CX_CLAIM_RECEIPT",
+      "file": "reference/cx_claim_receipt.clas.abap",
+      "description": "Exception for a missing receipt"
+    },
+    {
+      "type": "CLAS",
+      "name": "{{P}}CX_CLAIM_COSTCENTER",
+      "file": "reference/cx_claim_costcenter.clas.abap",
+      "description": "Exception for a missing cost center"
+    },
+    {
+      "type": "CLAS",
+      "name": "{{P}}EXPENSE_VALIDATOR",
+      "file": "reference/expense_validator.clas.abap",
+      "description": "Validates an expense claim and raises class-based exceptions",
+      "testclasses_file": "reference/expense_validator.testclasses.abap"
+    }
+  ],
+  "craft_checks": [
+    "method_length",
+    "exception_design"
+  ]
+}