| # Oracle Writer Instructions | |
| You are given rows from `data/oracle_seed.jsonl`. | |
| For each row: | |
| 1. Read `messages` as the exact chat input. `prompt` is only a flattened fallback for non-chat tooling. | |
| 2. Produce an optimized C++20 program that preserves exactly the same stdin/stdout behavior as `source_code`. | |
| 3. Return the original input `messages` unchanged, then append exactly one assistant message with: | |
| - one `<reasoning>...</reasoning>` block; | |
| - one fenced `cpp` code block; | |
| - no extra text before, between, or after those two parts. | |
| 4. Compile the generated program with the row's `compile.command`. | |
| 5. Run all visible tests from `visible_tests`. | |
| 6. Fill the `verification` object truthfully. | |
| Do not return partial-credit rows for training. If a solution does not compile or does not pass tests, mark it as failed and do not call it oracle data. | |
| The expected output JSONL shape is shown in `data/oracle_return_example.jsonl`. | |