{
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                                   },
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                                     "# Module 10 Self-Driven Lab\n",
                                     "\n",
                                     "Use this notebook as your workspace for **Advanced Reliability \u0026 Compaction**. The answer-key notebook sits next to this file. Work through each checkpoint before comparing against the completed version.\n"
                                 ]
                  },
                  {
                      "cell_type":  "markdown",
                      "metadata":  {

                                   },
                      "source":  [
                                     "# Module 10 — Advanced Reliability \u0026 Compaction\n",
                                     "\n",
                                     "Final module: keep long-running agents stable as the context window fills.\n",
                                     "\n",
                                     "- **Server-side compaction** (`compact_20260112`) replaces stale early history with a summary block once a token trigger fires.\n",
                                     "- **Case Facts pattern** keeps non-negotiable facts outside the compaction summary so they\u0027re never paraphrased away.\n",
                                     "- **Cache-System-Prompt pattern** preserves your prompt cache through compaction.\n",
                                     "- **Context-window awareness** lets you trigger compaction proactively at ~80% utilization.\n",
                                     "\n",
                                     "\u003e **Beta header required:** `compact-2026-01-12`."
                                 ]
                  },
                  {
                      "cell_type":  "markdown",
                      "metadata":  {

                                   },
                      "source":  [
                                     "## Setup"
                                 ]
                  },
                  {
                      "cell_type":  "code",
                      "execution_count":  null,
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                                   },
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                                  ],
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                                     "# Setup cell. Run this before the exercise cells below.\n",
                                     "import anthropic\n",
                                     "from dotenv import load_dotenv\n",
                                     "\n",
                                     "load_dotenv()\n",
                                     "client = anthropic.Anthropic()"
                                 ]
                  },
                  {
                      "cell_type":  "markdown",
                      "metadata":  {

                                   },
                      "source":  [
                                     "## 1. Enable server-side compaction with cache-stable system prompt\n",
                                     "\n",
                                     "Place a `cache_control` breakpoint at the **end of the system prompt** so it stays cached even after compaction rewrites the message history. Set `pause_after_compaction=True` if you want to inspect or augment the summary before the model resumes."
                                 ]
                  },
                  {
                      "cell_type":  "markdown",
                      "metadata":  {

                                   },
                      "source":  [
                                     "## Checkpoint 1\n",
                                     "\n",
                                     "Implement this step yourself. Use the preceding explanation and the module page as your guide, then compare your approach with the answer key after you have a working version.\n"
                                 ]
                  },
                  {
                      "cell_type":  "code",
                      "execution_count":  null,
                      "metadata":  {

                                   },
                      "outputs":  [

                                  ],
                      "source":  [
                                     "# TODO: Implement checkpoint 1 for Module 10.\n",
                                     "# Keep the cell focused, run it, inspect the output, then move to the next checkpoint.\n",
                                     "\n",
                                     "raise NotImplementedError(\u0027Complete checkpoint 1\u0027)\n"
                                 ]
                  },
                  {
                      "cell_type":  "markdown",
                      "metadata":  {

                                   },
                      "source":  [
                                     "## 2. Case Facts — preserve non-negotiable details\n",
                                     "\n",
                                     "Compaction summarizes — and summaries lose precise transactional details. Carve those out into a `case_facts` block placed **after** the compaction block. The cell below is a tiny store you update each turn with newly confirmed data."
                                 ]
                  },
                  {
                      "cell_type":  "markdown",
                      "metadata":  {

                                   },
                      "source":  [
                                     "## Checkpoint 2\n",
                                     "\n",
                                     "Implement this step yourself. Use the preceding explanation and the module page as your guide, then compare your approach with the answer key after you have a working version.\n"
                                 ]
                  },
                  {
                      "cell_type":  "code",
                      "execution_count":  null,
                      "metadata":  {

                                   },
                      "outputs":  [

                                  ],
                      "source":  [
                                     "# TODO: Implement checkpoint 2 for Module 10.\n",
                                     "# Keep the cell focused, run it, inspect the output, then move to the next checkpoint.\n",
                                     "\n",
                                     "raise NotImplementedError(\u0027Complete checkpoint 2\u0027)\n"
                                 ]
                  },
                  {
                      "cell_type":  "markdown",
                      "metadata":  {

                                   },
                      "source":  [
                                     "## 3. Proactive compaction at 80% utilization\n",
                                     "\n",
                                     "Sonnet 4.6 and Haiku 4.5 expose remaining context budget on the response. Trigger compaction yourself before you hit a hard limit, especially when adaptive thinking is on (thinking blocks now persist by default on Opus 4.5+ / Sonnet 4.6+ and accumulate fast)."
                                 ]
                  },
                  {
                      "cell_type":  "markdown",
                      "metadata":  {

                                   },
                      "source":  [
                                     "## Checkpoint 3\n",
                                     "\n",
                                     "Implement this step yourself. Use the preceding explanation and the module page as your guide, then compare your approach with the answer key after you have a working version.\n"
                                 ]
                  },
                  {
                      "cell_type":  "code",
                      "execution_count":  null,
                      "metadata":  {

                                   },
                      "outputs":  [

                                  ],
                      "source":  [
                                     "# TODO: Implement checkpoint 3 for Module 10.\n",
                                     "# Keep the cell focused, run it, inspect the output, then move to the next checkpoint.\n",
                                     "\n",
                                     "raise NotImplementedError(\u0027Complete checkpoint 3\u0027)\n"
                                 ]
                  },
                  {
                      "cell_type":  "markdown",
                      "metadata":  {

                                   },
                      "source":  [
                                     "## Reflection\n",
                                     "\n",
                                     "Before opening the answer key, write down what worked, what failed, and which API behavior or agent-design rule you would rely on in production.\n"
                                 ]
                  }
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