Generator: pilot analysis and fixes; G0002-G0021 tasks; handover notes merged

- Static bundle checks (name length, seed type, reserved words, contract test classes,
  testclasses_file), local abaplint parser check before SAP, max_tokens, robust JSON parse
- Runner: G2 for CDS views with parameters, contract_check detail in report
- G0020 and G0013 fixed by review and revalidated (oracle 100, null 0)
- Pilot results in docs/faz1-tasarim.md 11e; handover notes merged into CLAUDE.md and docs

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

tasks_gen/eval/G0005/spec.md

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+# 1. Goal
+A parcel service calculates the freight cost of a parcel from a zone code and a
+weight. Each rejected input must be reported as its own class-based exception, so
+that the calling program can react to the exact reason.
+
+# 2. Open questions
+None.
+
+# 3. Context
+- The class {{P}}ZONE_MASTER exists in package $TMP and is active. It provides the
+  zone master data. Do not change it.
+- {{P}}ZONE_MASTER has these public components:
+  - TYPES TY_ZONE with the components ZONE_CODE (c LENGTH 4), COUNTRY (c LENGTH 2),
+    BASE_FEE (p LENGTH 15 DECIMALS 2), PRICE_PER_KG (p LENGTH 15 DECIMALS 2),
+    MAX_WEIGHT_KG (i), CURRENCY (c LENGTH 5).
+  - TYPES TT_ZONE, a sorted table of TY_ZONE with the unique key ZONE_CODE.
+  - CLASS-METHOD GET_ALL returning the table TT_ZONE.
+- The zone master data contains these entries:
+
+  | ZONE_CODE | COUNTRY | BASE_FEE | PRICE_PER_KG | MAX_WEIGHT_KG | CURRENCY |
+  | --------- | ------- | -------- | ------------ | ------------- | -------- |
+  | DE01      | DE      | 5.00     | 1.20         | 31            | EUR      |
+  | DE02      | DE      | 8.00     | 1.80         | 31            | EUR      |
+  | FR01      | FR      | 9.50     | 2.10         | 30            | EUR      |
+  | US01      | US      | 14.00    | 3.40         | 25            | USD      |
+  | CN01      | CN      | 18.00    | 4.25         | 20            | CNY      |
+
+# 4. Contract
+Create these classes in package $TMP.
+
+{{P}}CX_FREIGHT_ERROR
+- public, abstract, inherits from CX_STATIC_CHECK.
+- public attribute MV_ZONE_CODE type c LENGTH 4.
+- public method GET_REASON_TEXT returning VALUE(rv_text) type string.
+
+{{P}}CX_UNKNOWN_ZONE
+- public, inherits from {{P}}CX_FREIGHT_ERROR.
+
+{{P}}CX_INVALID_WEIGHT
+- public, inherits from {{P}}CX_FREIGHT_ERROR.
+- public attribute MV_WEIGHT_KG type p LENGTH 15 DECIMALS 3.
+
+{{P}}CX_WEIGHT_LIMIT
+- public, inherits from {{P}}CX_FREIGHT_ERROR.
+- public attribute MV_WEIGHT_KG type p LENGTH 15 DECIMALS 3.
+- public attribute MV_MAX_WEIGHT_KG type i.
+
+GET_REASON_TEXT returns the reason text of the exception. Each of the three
+concrete exception classes returns its own text, see the business rules.
+
+{{P}}FREIGHT_CALC
+- public, final, create public, constructor without parameters.
+- public type TY_COST (p LENGTH 15 DECIMALS 2).
+- public type TY_WEIGHT (p LENGTH 15 DECIMALS 3).
+- public type TY_RESULT with the components COST (type TY_COST) and CURRENCY
+  (c LENGTH 5).
+- public method CALCULATE:
+
+  IMPORTING iv_zone_code     TYPE c LENGTH 4
+            iv_weight_kg     TYPE ty_weight
+            iv_express       TYPE abap_bool DEFAULT abap_false
+  RETURNING VALUE(rs_result) TYPE ty_result
+  RAISING   {{p}}cx_freight_error
+
+- no other public methods.
+
+Use the named types of this contract in the method interfaces. Do not write the
+additions LENGTH or DECIMALS in a method interface.
+
+# 5. Business rules
+CALCULATE applies these rules in this sequence.
+1. Convert the zone code to upper case. Use this value in all further steps and in
+   the attribute MV_ZONE_CODE of every exception.
+2. If the weight is less than or equal to zero, raise {{P}}CX_INVALID_WEIGHT. Set
+   MV_ZONE_CODE to the zone code and MV_WEIGHT_KG to the given weight.
+3. Read the zone master data with {{P}}ZONE_MASTER=>GET_ALL and find the entry
+   whose ZONE_CODE equals the zone code. If there is no such entry, raise
+   {{P}}CX_UNKNOWN_ZONE and set MV_ZONE_CODE to the zone code.
+4. If the weight is greater than MAX_WEIGHT_KG, raise {{P}}CX_WEIGHT_LIMIT. Set
+   MV_ZONE_CODE to the zone code, MV_WEIGHT_KG to the given weight and
+   MV_MAX_WEIGHT_KG to MAX_WEIGHT_KG.
+5. Calculate the cost as BASE_FEE + weight x PRICE_PER_KG.
+6. If IV_EXPRESS is ABAP_TRUE, multiply the cost by 1.5.
+7. Keep the full precision of the cost until this step. Do not round the cost
+   before this step. Round the cost to 2 decimal places with commercial rounding.
+8. If the rounded cost is less than 6.00, use 6.00.
+9. Return the cost in COST and the CURRENCY of the zone in CURRENCY.
+
+GET_REASON_TEXT returns:
+- in {{P}}CX_UNKNOWN_ZONE: 'Zone ', then the zone code, then ' is not known'.
+  Example: 'Zone XX99 is not known'.
+- in {{P}}CX_INVALID_WEIGHT: 'Weight must be greater than zero'.
+- in {{P}}CX_WEIGHT_LIMIT: 'Weight exceeds the zone limit'.
+
+# 6. Constraints
+- Release target: SAP_BASIS 816 (ABAP Platform 2025).
+- Coding standards: Clean ABAP. Methods below 40 statements. No global variables.
+- Out of scope: do not change {{P}}ZONE_MASTER.
+
+# 7. Acceptance
+- All classes are active and have no syntax error.
+- The hidden tests pass.
+- Write your own ABAP Unit tests for {{P}}FREIGHT_CALC.