/**
 * Labels a conversational message as a user comment. Providers without a real
 * system prompt (codex prepends it to the user turn) lose the assistant-mode
 * role text in the noise, and a bare "fix X" message then reads as an
 * implementation request — the label keeps it conversation material.
 */
export declare function frameUserComment(lang: 'en' | 'ja', userMessage: string): string;
export declare function formatLiteralBlock(content: string): string;
export declare function prependInitialPromptContext(userMessage: string, initialPromptContext?: string): string;
export declare function formatSourceContextSection(lang: 'en' | 'ja', sourceContext?: string): string;
export declare function prependSourceContext(lang: 'en' | 'ja', userMessage: string, sourceContext?: string): string;
export declare function prependSourceContextGuardToSystemPrompt(lang: 'en' | 'ja', systemPrompt: string): string;
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