Fetching from the wire…
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Infra2026-06-14 · source-backed
Willison's June 13 post walks through publishing WebAssembly wheels to PyPI so Python packages run client-side under Pyodide, alongside Datasette 1.0a33 adding JSON "extras" to the API (Simon Willison). He built a throwaway extras-API explorer with Claude Fable 5 to understand the feature, the build-a-tool-to-learn-a-feature workflow in miniature. If you ship browser-side Python, the WASM-wheel packaging path is the actionable bit.
Each link below shares sources, entities, or timing with this story.
Simon Willison released 1.0a33 on June 11, extending the ?_extra= JSON API to queries and rows. The build method is the interesting part: he planned with Claude Fable 5 in Claude Code and implemented with GPT-5.5 xhigh in Codex Desktop. One feature, two models, planning split...
Prompted by Julia Evans admitting on July 17 that she still can't read query plans, Willison had Fable build a tool that runs arbitrary SQL against a SQLite database and renders both EXPLAIN QUERY PLAN and the lower-level EXPLAIN bytecode with per-line plain-English annotation...
This is the case study I'll be pointing people to for months. Simon Willison shipped sqlite-utils 4.0rc2 on July 5, his first major version bump since 2020, with most of the code written by "Claude Fable" across 37 prompts and 34 commits, for about $149.25 total. The number th...
On June 6, Willison released micropython-wasm, an alpha package that runs untrusted Python inside a WebAssembly binary with enforced memory, CPU, and file/network limits. He wired it into a Datasette Agent plugin, put GPT-5.5 xhigh inside, and challenged it to break out. So fa...
Anthropic shipped Fable 5 on June 9. Willison spent ~5.5 hours stress-testing it: slow and expensive, but it handled everything he threw at it, including agentic coding. (Simon Willison) The tell that it's a real working model and not a benchmark queen: because it post-dated A...
Willison launched datasette-apps (0.1a2) on June 18, hosting self-contained HTML+JS apps in a sandboxed iframe that run SQL against your data, read-only by default. He frames it as "Claude Artifacts reimagined for Datasette," artifacts backed by a JSON API to a relational data...
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