Pipeline controller: plan 2 (hard +, error +50 %), backlog throttle, 2 trajectory workers, stop rules, summaries every 50; budget reserve

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

tasks_gen/train/G1005/spec.md

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+# 1. Goal
+
+A furniture shop sells furniture on instalment plans. A checkout program calls one
+check before the shop grants an instalment plan to a customer. The program needs
+one reason code for each customer.
+
+# 2. Open questions
+
+None.
+
+# 3. Context
+
+- The interface {{P}}IF_CREDIT_CHECK exists in package $TMP. It is active.
+- The interface declares the type of the reason, the type of a money amount, the
+  constants of the reason codes, and one method.
+- The method name, the parameter names and the parameter types are not in this
+  document. Read the interface in the system.
+- The reason constants have the names OK, AGE, INCOME, OPEN_PLAN and LIMIT.
+
+# 4. Contract
+
+- Create the class {{P}}CREDIT_CHECKER in package $TMP.
+- The class is public and final. It has a public constructor without parameters.
+- The class implements the interface {{P}}IF_CREDIT_CHECK.
+- Do not add other public methods.
+
+# 5. Business rules
+
+The check receives the age of the customer in years, the net monthly income of the
+customer, the number of open instalment plans of the customer, and the amount of
+the new order. Apply the rules in this sequence. Return the reason of the first
+rule that fails.
+
+1. If the age is less than 18, return AGE.
+2. If the net monthly income is zero or less, return INCOME.
+3. If the number of open instalment plans is 2 or more, return OPEN_PLAN.
+4. Calculate the credit limit:
+   - Start with three times the net monthly income.
+   - Subtract 500 for each open instalment plan.
+   - If the age is less than 21, halve the limit and round the result down to
+     whole euros. Example: 3750.75 becomes 3750.00.
+5. If the amount of the new order is more than the credit limit, return LIMIT.
+6. Else return OK.
+
+# 6. Constraints
+
+- Release target: SAP_BASIS 8.16 (ABAP Platform 2025).
+- Coding standards: Clean ABAP. Method length below 40 statements. No global
+  variables. No comment that restates the code.
+- Out of scope: do not change the interface {{P}}IF_CREDIT_CHECK.
+
+# 7. Acceptance
+
+- The class is active and has no syntax error.
+- The hidden tests pass.
+- Write your own ABAP Unit tests for the class.