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/G1015/spec.md

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+# 1. Goal
+A vehicle recovery service charges a call-out fee for a breakdown tow. A dispatch
+program calls the calculation for each completed tow. The program needs the fee
+and one status code for each call.
+
+# 2. Open questions
+None.
+
+# 3. Context
+- Package $TMP is available.
+- The class is self-contained. No other object is necessary.
+
+# 4. Contract
+- Create the class {{P}}TOWING_FEE in package $TMP.
+- The class is public and final. It has a public constructor without parameters.
+- The class has these public types:
+  - TY_STATUS: character field, length 8.
+  - TY_AMOUNT: integer.
+  - TY_CLASS: character field, length 1.
+  - TY_RESULT: structure with the components STATUS (type TY_STATUS) and FEE
+    (type TY_AMOUNT).
+- The class has the public constant structure C_STATUS with the components OK,
+  BAD_CLASS, BAD_DISTANCE and BAD_HOUR. The values are 'OK', 'CLASS',
+  'DISTANCE' and 'HOUR'.
+- The class has exactly one public method:
+  CALCULATE
+    IMPORTING iv_vehicle_class TYPE ty_class
+              iv_distance_km   TYPE i
+              iv_hour          TYPE i
+              iv_is_weekend    TYPE abap_bool
+    RETURNING VALUE(rs_result) TYPE ty_result.
+- Do not add other public methods.
+
+# 5. Business rules
+The method CALCULATE applies the rules in this sequence.
+1. Check the input. Return the status of the first check that fails:
+   1.1 The vehicle class must be 'S', 'M' or 'L'. Else return BAD_CLASS.
+   1.2 The distance must be from 1 to 500 kilometres. Else return BAD_DISTANCE.
+   1.3 The hour must be from 0 to 23. Else return BAD_HOUR.
+   If a check fails, the fee is 0.
+2. The base fee comes from the vehicle class:
+   S = 60 EUR, M = 90 EUR, L = 140 EUR.
+3. The distance charge: the first 10 kilometres are free. Each kilometre above
+   10 kilometres costs 2 EUR.
+4. Add the base fee and the distance charge. The result is the subtotal.
+5. The night is the hour 22, the hour 23 and the hours 0 to 5. If the call is at
+   night, calculate 25 percent of the subtotal. Round this night surcharge down
+   to a full euro.
+6. If the call is on a weekend, calculate 15 percent of the subtotal. Round this
+   weekend surcharge down to a full euro. The night surcharge and the weekend
+   surcharge can apply together. Calculate both surcharges from the subtotal.
+7. Add the subtotal and all surcharges. The result is the total.
+8. If the total is below 80 EUR, the total is 80 EUR.
+9. Round the total up to a full 5 EUR. If the total is already a full 5 EUR, the
+   total does not change.
+10. Return the status OK and the fee.
+
+# 6. Constraints
+- Release target: ABAP Platform 2025 (SAP_BASIS 816).
+- Coding standards: Clean ABAP. Method length below 40 statements. No global
+  variables. No comment that restates the code.
+- Out of scope: do not create other objects.
+
+# 7. Acceptance
+- The class is active and has no syntax error.
+- The hidden tests pass.
+- Write your own ABAP Unit tests for the class.