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"plaintext": "> After two days of experience with Claude Fable 5 I think the best way to describe it is relentlessly proactive . It knows a whole lot of tricks and it will deploy pretty much any of them to get to its goal. I'll illustrate this with an example. I was hacking on Datasette Agent today when I noticed a glitch: a horizontal scrollbar that shouldn't be there in the jump menu chat prompt. I snapped this screenshot: Then I started a fresh claude session in my datasette-agent checkout, dragged in the s…"
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"description": "<p>After two days of experience with <a href=\"https://simonwillison.net/2026/Jun/9/claude-fable-5/\">Claude Fable 5</a> I think the best way to describe it is <strong>relentlessly proactive</strong>. It knows a whole lot of tricks and it will deploy pretty much any of them to get to its goal.</p>\n<p>I'll illustrate this with an example. I was hacking on <a href=\"https://agent.datasette.io/\">Datasette Agent</a> today when I noticed a glitch: a horizontal scrollbar that shouldn't be there in the jump menu chat prompt. I snapped this screenshot:</p>\n<p><img src=\"https://static.simonwillison.net/static/2026/jump-to-bug.jpg\" alt=\"Screenshot of a modal dialog demonstrating a scrollbar bug. At the top is a focused search input with blue outline and placeholder "Jump to...", with an X close button to its right. Below, a heading reads "Start a new agent chat" above a textarea with the placeholder "Ask a question about your data..." — the bug: a thick gray horizontal scrollbar is incorrectly displayed along the bottom edge of the empty textarea, spanning nearly its full width, next to the resize handle. Below the textarea: "Press Enter to start. Shift+Enter adds a new line." followed by a blue "Start chat" button.\" style=\"max-width: 100%;\" /></p>\n<p>Then I started a fresh <code>claude</code> session in my <code>datasette-agent</code> checkout, dragged in the screenshot and told it:</p>\n<blockquote>\n<p><code>Look at dependencies to help…",
"title": "Claude Fable is relentlessly proactive",
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"textContent": "> After two days of experience with Claude Fable 5 I think the best way to describe it is relentlessly proactive . It knows a whole lot of tricks and it will deploy pretty much any of them to get to its goal. I'll illustrate this with an example. I was hacking on Datasette Agent today when I noticed a glitch: a horizontal scrollbar that shouldn't be there in the jump menu chat prompt. I snapped this screenshot: Then I started a fresh claude session in my datasette-agent checkout, dragged in the s…\n\n<p>After two days of experience with <a href=\"https://simonwillison.net/2026/Jun/9/claude-fable-5/\">Claude Fable 5</a> I think the best way to describe it is <strong>relentlessly proactive</strong>. It knows a whole lot of tricks and it will deploy pretty much any of them to get to its goal.</p>\n<p>I'll illustrate this with an example. I was hacking on <a href=\"https://agent.datasette.io/\">Datasette Agent</a> today when I noticed a glitch: a horizontal scrollbar that shouldn't be there in the jump menu chat prompt. I snapped this screenshot:</p>\n<p><img src=\"https://static.simonwillison.net/static/2026/jump-to-bug.jpg\" alt=\"Screenshot of a modal dialog demonstrating a scrollbar bug. At the top is a focused search input with blue outline and placeholder "Jump to...", with an X close button to its right. Below, a heading reads "Start a new agent chat" above a textarea with the placeholder "Ask a question about your data..." — the bug: a thick gray horizontal scrollbar is incorrectly displayed along the bottom edge of the empty textarea, spanning nearly its full width, next to the resize handle. Below the textarea: "Press Enter to start. Shift+Enter adds a new line." followed by a blue "Start chat" button.\" style=\"max-width: 100%;\" /></p>\n<p>Then I started a fresh <code>claude</code> session in my <code>datasette-agent</code> checkout, dragged in the screenshot and told it:</p>\n<blockquote>\n<p><code>Look at dependencies to help…",
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