新增: F-15上下文压缩基础(compress_prompt四段式+compress_via_llm+context辅助方法)

2026-06-17 00:50:47 +08:00
parent 76d823ded0
commit 63bff8bf96
4 changed files with 507 additions and 17 deletions
@@ -127,3 +127,69 @@ pub(crate) async fn build_system_prompt(state: &AppState, lang: &str) -> String

    prompt
 }
+
+/// 上下文压缩 system prompt 模板（F-15 §4.2，纯函数无 IO）。
+///
+/// 引导 LLM 把对话压缩为四段式结构化摘要（意图/决策/文件/约束），最大化保留
+/// 旧消息语义。调用方把返回的 system prompt 放在消息列表首位，后接被压缩的
+/// active 消息原文（user/assistant/tool）喂给 `provider.complete()`：
+///
+/// ```ignore
+/// let mut msgs = vec![ChatMessage::system(compress_prompt(lang))];
+/// msgs.extend(active_msgs);
+/// let resp = provider.complete(CompletionRequest { messages: msgs, .. }).await?;
+/// ```
+///
+/// `lang` 与系统提示词保持一致取值集合（"en" 英文，其余一律中文）。
+//
+// dead_code:阶段1 基础函数,阶段2 IPC(ai_chat_compress_context)与阶段3 agentic
+// 自动压缩会经 compress_via_llm 调用本函数。本阶段只暴露 + 单测,不接调用点。
+#[allow(dead_code)]
+pub(crate) fn compress_prompt(lang: &str) -> &'static str {
+    match lang {
+        "en" => "You are a conversation summarizer. Compress the following conversation \
+                 into a structured summary that preserves the essential context for \
+                 continuing the work. Output exactly four sections:\n\
+                 \n\
+                 ## Intent\n\
+                 The user's core intent and requirements (what they are trying to achieve).\n\
+                 \n\
+                 ## Decisions\n\
+                 Key decisions already made (which approach/option was chosen, why alternatives \
+                 were rejected).\n\
+                 \n\
+                 ## Files\n\
+                 Files modified/created/inspected, with a one-line description of the change in each.\n\
+                 \n\
+                 ## Constraints\n\
+                 Important constraints, preferences, or open issues to respect going forward.\n\
+                 \n\
+                 Rules:\n\
+                 - Be concise; prefer bullet points.\n\
+                 - Drop small talk and transient pleasantries; keep only technically load-bearing facts.\n\
+                 - Preserve file paths, identifiers, and error messages verbatim.\n\
+                 - Do NOT invent facts not present in the conversation.\n\
+                 - Output the four sections only, no preamble or extra commentary.",
+        _ => "你是对话总结器。请把以下对话压缩为结构化摘要,保留继续推进工作所必需的关键上下文。\
+               严格按以下四段输出:\n\
+               \n\
+               ## 意图\n\
+               用户的核心意图和需求(用户想要达成什么)。\n\
+               \n\
+               ## 决策\n\
+               已做出的关键决策(选了哪种方案/选项,为何排除其他方案)。\n\
+               \n\
+               ## 文件\n\
+               已修改/创建/查看过的文件,每条一行简述其变更内容。\n\
+               \n\
+               ## 约束\n\
+               重要约束、偏好或待解决的问题,后续需要继续遵守或留意。\n\
+               \n\
+               要求:\n\
+               - 简洁,优先用要点。\n\
+               - 去掉寒暄、过渡性客套,只保留技术上有价值的事实。\n\
+               - 文件路径、标识符、错误信息等照原样保留。\n\
+               - 不要编造对话中没有的事实。\n\
+               - 只输出上述四段内容,不要前言、解释或额外评论。",
+    }
+}