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    "title": "Placement Checklist",
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    "article": "# Placement Checklist\n\nUse this checklist when someone says \"this tool is an agent platform\" or \"this framework does everything.\" It forces the classification into concrete responsibilities instead of labels.\n\n## Step 1: Pin down the model side\n\n- What model family or version is actually being used?\n- Who serves it?\n- What transport or protocol carries requests to it?\n\nThis covers Layers 1, 2, and 3.\n\n## Step 2: Pin down the agent side\n\n- Where is the actual decision loop or graph logic?\n- Where do tools, approvals, interrupts, and session state live?\n- Where do installed skills, plugins, channels, and extension contracts live?\n\nThis covers Layers 4, 5, and 6.\n\n## Step 3: Pin down the operating boundary\n\n- What workspace does the agent read and write?\n- Where do shell commands, browser runs, or tool actions execute?\n- What policy restricts files, network, secrets, or binaries?\n\nThis covers Layers 7, 8, and 9.\n\n## Step 4: Pin down the surface\n\n- What actions are exposed to users or systems?\n- How are results rendered, streamed, or integrated?\n\nThis covers Layers 10 and 11.\n\n## Step 5: Record what is delegated\n\nNot every product owns every layer. Explicitly note when a layer is delegated to:\n\n- an IDE\n- a host application\n- a CI runner\n- a cloud control plane\n- a user-managed shell or container\n\nDelegated layers still exist. They just are not owned by the product you are classifying.\n\n## Step 6: Write the placement in one sentence\n\nForce yourself to write a short sentence with three parts:\n\n1. main owned layers\n2. main delegated layers\n3. main exposed surface\n\nIf you cannot do that clearly, your classification is still too fuzzy.\n\n## Minimal worksheet\n\n| Layer band | Owned | Exposed | Delegated | Notes |\n|---|---|---|---|---|\n| 1-3 Model supply |  |  |  |  |\n| 4-6 Agent system |  |  |  |  |\n| 7-9 Operating boundary |  |  |  |  |\n| 10-11 Surface |  |  |  |  |\n\nFill this before arguing about labels.\n\n## Output format\n\nWhen you finish, you should be able to say something like:\n\n`This product mainly owns Layers 4-6, delegates 7-9 to the host environment, and exposes Layers 10-11 through a web UI and API.`\n\n## Follow-up\n\n- Use [`layers.md`](./layers.md) to verify disputed boundaries.\n- Use [`04-worked-examples.md`](./04-worked-examples.md) if you want to compare your result to common product shapes.\n",
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