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The system instruction gives the answer format as a template of bracketed placeholders, and the model copies them instead of filling them in: on four fabricated events the old instruction opened every answer with the literal "[Краткое summary]". The format is now one filled example, kept inside a tag so it reads as a sample rather than as part of the conversation, and the rules say what the answer contains instead of what it must not do. Forbidding the copying was the alternative, but it leaves the placeholders in front of the model. On the same four events an example-based instruction opened every answer with a sentence about the error itself and kept all three section headings. The example is written in the markup the rules ask for: identifiers in backticks, multi-line code in a fenced block between list items. The rules never mentioned inline code, and answers came back with identifiers as plain words and without code blocks. Everything outside the example is in English, the language of the spotlighting rules it is concatenated with. The example carries the language of the answer.
e11sy
reviewed
Sep 21, 2026
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| * The shape comes from a filled example. | ||
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| * @see {@link https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/claude-prompting-best-practices | Claude prompting best practices} |
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as i remember we've used OpenAI API, maybe there is peace of doc from them?
it would be more relevant
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Done, swapped to the OpenAI prompt engineering guide.
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The answer format was a template of bracketed placeholders, so the model copied it instead of filling it in..
Before and after, the first line of an answer:
The format is now one filled example in an
<example>tag, with the markup rules in a<markup>tag beside it, both named from the instruction above them.