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feat: refresh context compaction lesson

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Haoran
2026-07-31 15:52:53 +08:00
parent 2affb3f345
commit 13dc5396bb
34 changed files with 1267 additions and 786 deletions
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<text x="380" y="28" fill="#fff" font-size="15" font-weight="700" text-anchor="middle">上下文压缩 — 预处理管线 + 自动压缩 + 应急兜底</text>
<text x="380" y="28" fill="#fff" font-size="15" font-weight="700" text-anchor="middle">上下文压缩：四步管线与 API 拒绝后的补救</text>
<!-- 左侧说明 -->
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<text x="130" y="82" fill="#1e3a5f" font-size="12" font-weight="700" text-anchor="middle">设计原则</text>
<text x="130" y="100" fill="#475569" font-size="10" text-anchor="middle">便宜的先跑，贵的后跑</text>
<text x="130" y="116" fill="#475569" font-size="10" text-anchor="middle">能改文本 → 不删整条</text>
<text x="130" y="132" fill="#475569" font-size="10" text-anchor="middle">能删整条 → 不调 LLM</text>
<text x="130" y="100" fill="#475569" font-size="10" text-anchor="middle">低成本的处理优先执行</text>
<text x="130" y="116" fill="#475569" font-size="10" text-anchor="middle">可恢复的信息优先保留</text>
<text x="130" y="132" fill="#475569" font-size="10" text-anchor="middle">整理后仍超限才生成摘要</text>
<!-- 右侧代价箭头 -->
<rect x="530" y="62" width="210" height="80" rx="6" fill="#f8fafc" stroke="#cbd5e1" stroke-width="1"/>
<text x="635" y="82" fill="#1e3a5f" font-size="12" font-weight="700" text-anchor="middle">代价递增</text>
<text x="635" y="104" fill="#475569" font-size="10" text-anchor="middle">文本操作 → LLM 摘要 → 应急裁剪</text>
<text x="635" y="124" fill="#94a3b8" font-size="9" text-anchor="middle">0 API · 0 API · 0 API · 1 API · 1 API</text>
<text x="635" y="104" fill="#475569" font-size="10" text-anchor="middle">结构整理 → 历史摘要 → 错误后补救</text>
<text x="635" y="124" fill="#94a3b8" font-size="9" text-anchor="middle">0 API × 3 · 1 API · 最多再 1 API</text>
<!-- ===== 预处理管线标题 ===== -->
<rect x="20" y="146" width="720" height="24" rx="4" fill="#f1f5f9"/>
<text x="55" y="163" fill="#64748b" font-size="11" font-weight="600">预处理管线（执行顺序：L3 → L1 → L2，每轮 LLM 调用前自动执行，0 API）</text>
<text x="55" y="163" fill="#64748b" font-size="11" font-weight="600">预处理管线（执行顺序：Step 1 → Step 2 → Step 3，每轮调用前执行，0 API）</text>
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<!-- Step 1: tool_result_budget -->
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<text x="100" y="200" fill="#1e40af" font-size="12" font-weight="600">L3</text>
<text x="135" y="200" fill="#1e40af" font-size="13" font-weight="700">toolResultBudget</text>
<text x="260" y="200" fill="#1e40af" font-size="11">tool_result 总和 &gt; 200KB → 最大项落盘</text>
<text x="100" y="200" fill="#1e40af" font-size="12" font-weight="600">Step 1</text>
<text x="155" y="200" fill="#1e40af" font-size="13" font-weight="700">tool_result_budget</text>
<text x="315" y="200" fill="#1e40af" font-size="11">总和 &gt; 200,000 字符 → 最大项落盘</text>
<text x="650" y="200" fill="#1e40af" font-size="10" text-anchor="end">保留完整内容</text>
<text x="135" y="218" fill="#2563eb" font-size="9">触发：每轮自动，必须在 microCompact 之前保留完整内容</text>
<text x="155" y="218" fill="#2563eb" font-size="9">每轮执行，在 micro_compact 前保留超大结果</text>
<!-- 箭头 L3→L1 -->
<!-- Step 1 to Step 2 -->
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<!-- L1: snipCompact -->
<!-- Step 2: snip_compact -->
<rect x="80" y="240" width="600" height="46" rx="7" fill="url(#pre)" stroke="#2563eb" stroke-width="1.5"/>
<text x="100" y="260" fill="#1e40af" font-size="12" font-weight="600">L1</text>
<text x="135" y="260" fill="#1e40af" font-size="13" font-weight="700">snipCompact</text>
<text x="100" y="260" fill="#1e40af" font-size="12" font-weight="600">Step 2</text>
<text x="155" y="260" fill="#1e40af" font-size="13" font-weight="700">snip_compact</text>
<text x="260" y="260" fill="#1e40af" font-size="11">消息 &gt; 50 条 → 裁掉中间</text>
<text x="650" y="260" fill="#1e40af" font-size="10" text-anchor="end">保留头尾</text>
<text x="135" y="278" fill="#2563eb" font-size="9">触发：消息数超过阈值</text>
<text x="155" y="278" fill="#2563eb" font-size="9">消息超过 50 条时裁剪，并保护工具调用与结果的配对</text>
<!-- 箭头 L1→L2 -->
<!-- Step 2 to Step 3 -->
<line x1="380" y1="286" x2="380" y2="298" stroke="#94a3b8" stroke-width="1" marker-end="url(#arrow-d)"/>
<!-- L2: microCompact -->
<!-- Step 3: micro_compact -->
<rect x="80" y="300" width="600" height="46" rx="7" fill="url(#pre)" stroke="#2563eb" stroke-width="1.5"/>
<text x="100" y="320" fill="#1e40af" font-size="12" font-weight="600">L2</text>
<text x="135" y="320" fill="#1e40af" font-size="13" font-weight="700">microCompact</text>
<text x="100" y="320" fill="#1e40af" font-size="12" font-weight="600">Step 3</text>
<text x="155" y="320" fill="#1e40af" font-size="13" font-weight="700">micro_compact</text>
<text x="260" y="320" fill="#1e40af" font-size="11">旧 tool_result → 占位符（保留最近 3 条）</text>
<text x="650" y="320" fill="#1e40af" font-size="10" text-anchor="end">压旧结果</text>
<text x="135" y="338" fill="#2563eb" font-size="9">触发：每轮自动，把较旧结果替换为文本占位符</text>
<text x="155" y="338" fill="#2563eb" font-size="9">每轮执行，最近 3 条结果保持完整</text>
<!-- ===== 自动压缩标题 ===== -->
<rect x="20" y="358" width="720" height="24" rx="4" fill="#f1f5f9"/>
<text x="70" y="375" fill="#64748b" font-size="11" font-weight="600">自动压缩决策（预处理不够时触发，1 API 调用）</text>
<!-- L4: autoCompact -->
<!-- Step 4: compact_history -->
<rect x="80" y="390" width="600" height="58" rx="7" fill="url(#auto)" stroke="#dc2626" stroke-width="2"/>
<text x="100" y="412" fill="#991b1b" font-size="12" font-weight="600">L4</text>
<text x="135" y="412" fill="#991b1b" font-size="13" font-weight="700">autoCompact</text>
<text x="260" y="412" fill="#991b1b" font-size="11">token 超阈值 → LLM 全量摘要</text>
<text x="100" y="412" fill="#991b1b" font-size="12" font-weight="600">Step 4</text>
<text x="155" y="412" fill="#991b1b" font-size="13" font-weight="700">compact_history</text>
<text x="305" y="412" fill="#991b1b" font-size="11">size 超过 50,000 → LLM 摘要</text>
<text x="590" y="412" fill="#991b1b" font-size="10" text-anchor="end">1 API 调用</text>
<text x="135" y="428" fill="#dc2626" font-size="9">阈值: contextWindow - maxOutputTokens - 13,000 · 先尝试 sessionMemoryCompact，不够才调 LLM</text>
<text x="135" y="442" fill="#dc2626" font-size="9">熔断：连续失败 3 次后停止重试</text>
<text x="155" y="428" fill="#dc2626" font-size="9">条件：estimate_size(messages) &gt; CONTEXT_LIMIT</text>
<text x="155" y="442" fill="#dc2626" font-size="9">先保存 transcript，再用一条摘要替换当前历史</text>
<!-- ===== 应急兜底标题 ===== -->
<rect x="20" y="460" width="720" height="24" rx="4" fill="#f1f5f9"/>
<text x="55" y="477" fill="#64748b" font-size="11" font-weight="600">应急兜底（API 仍然返回 prompt_too_long 时触发）</text>
<text x="55" y="477" fill="#64748b" font-size="11" font-weight="600">错误后补救（API 返回 prompt_too_long 时触发，最多一次）</text>
<!-- 应急: reactiveCompact -->
<!-- Fallback: reactive_compact -->
<rect x="80" y="492" width="600" height="62" rx="7" fill="url(#emergency)" stroke="#c2410c" stroke-width="1.5"/>
<text x="100" y="512" fill="#9a3412" font-size="12" font-weight="600">应急</text>
<text x="135" y="512" fill="#9a3412" font-size="13" font-weight="700">reactiveCompact</text>
<text x="135" y="528" fill="#9a3412" font-size="10">API 返回 413 / prompt_too_long → 字节级裁剪</text>
<text x="135" y="544" fill="#c2410c" font-size="9">保留最后 5 条 + 摘要，比 autoCompact 更激进</text>
<text x="100" y="512" fill="#9a3412" font-size="12" font-weight="600">补救</text>
<text x="155" y="512" fill="#9a3412" font-size="13" font-weight="700">reactive_compact</text>
<text x="155" y="528" fill="#9a3412" font-size="10">总结较早历史，保留最近 5 条消息</text>
<text x="155" y="544" fill="#c2410c" font-size="9">保持工具调用与结果配对，随后重试一次</text>
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