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/G1041/spec.md

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+# 1. Goal
+A zoo keeps a feed store. Two suppliers send their feed deliveries. The store
+manager needs one consolidated stock list per feed type, the quantity of one
+feed type, and the feed type with the highest quantity. A store program calls
+the class for each delivery round.
+
+# 2. Open questions
+None.
+
+# 3. Context
+- Interface {{P}}IF_FEED_STOCK exists in package $TMP. It is active.
+- The interface has these types:
+  - TY_FEED_TYPE (CHAR 8), TY_UNIT (CHAR 3), TY_QUANTITY (packed, 3 decimals).
+  - TY_DELIVERY with the fields FEED_TYPE, UNIT and QUANTITY.
+  - TT_DELIVERY: a table of TY_DELIVERY.
+  - TY_STOCK with the fields FEED_TYPE, UNIT, QUANTITY and DELIVERIES
+    (integer).
+  - TT_STOCK: a table of TY_STOCK.
+- The interface has three methods:
+  - CONSOLIDATE with the importing parameters IT_SUPPLIER_A and IT_SUPPLIER_B
+    (both TT_DELIVERY) and the returning parameter RT_STOCK (TT_STOCK).
+  - QUANTITY_OF with the importing parameters IT_STOCK (TT_STOCK) and
+    IV_FEED_TYPE (TY_FEED_TYPE) and the returning parameter RV_QUANTITY
+    (TY_QUANTITY).
+  - TOP_FEED with the importing parameter IT_STOCK (TT_STOCK) and the
+    returning parameter RV_FEED_TYPE (TY_FEED_TYPE).
+
+# 4. Contract
+- Create the class {{P}}FEED_STOCK in package $TMP.
+- The class is public, final, and has a public constructor without parameters.
+- The class implements {{P}}IF_FEED_STOCK.
+- Do not add other public methods.
+
+# 5. Business rules
+
+## 5.1 Input
+- A delivery row has the fields FEED_TYPE, UNIT and QUANTITY.
+- The caller passes two delivery lists: supplier A and supplier B. Each list
+  can hold any number of rows, including none.
+
+## 5.2 CONSOLIDATE
+1. Count a row only when its feed type is not empty and its quantity is not
+   zero. Ignore every other row.
+2. Read the counted rows of supplier A first, in the given order, then the
+   counted rows of supplier B, in the given order.
+3. Group the counted rows by feed type. The result has one row per feed type.
+4. The quantity of a result row is the sum of the quantities of the counted
+   rows of this feed type. A negative quantity reduces the sum.
+5. The unit of a result row is the unit of the first counted row of this feed
+   type.
+6. The deliveries of a result row is the number of counted rows of this feed
+   type.
+7. Remove a result row whose quantity is zero.
+8. Sort the result rows by feed type in ascending order.
+9. Return an empty list when no result row remains.
+
+## 5.3 QUANTITY_OF
+1. Return the quantity of the result row with the given feed type.
+2. Return zero when the list has no row with this feed type.
+
+## 5.4 TOP_FEED
+1. Return the feed type with the highest quantity in the list.
+2. When more than one feed type has the same highest quantity, return the feed
+   type that comes first in ascending order.
+3. Return an empty feed type when the list is empty.
+
+# 6. Constraints
+- Release target: 8.16.
+- Coding standards: Clean ABAP. Method length below 40 statements. No global
+  variables. No comment that restates the code.
+- Out of scope: do not change {{P}}IF_FEED_STOCK.
+
+# 7. Acceptance
+- The class is active and has no syntax error.
+- The hidden tests pass.
+- Write your own ABAP Unit tests for the class.