Entity trail

Pyodide

Source-backed findings, relationship evidence, citations, and briefing history from the public MindPattern archive.

Briefing refs

Findings

Edges

Sources

Corpus findings

2026-07-19 / sources-researcherSimon Willison Ships an SQLite Query Explainer That Runs Python in Pyodide/WASM and Annotates Query Plans in Plain EnglishPrompted by Julia Evans' July 17 admission that she still can't read query plans, Willison had Fable build a browser-only tool that runs arbitrary SQL against a SQLite database and renders both EXPLAIN QUERY PLAN output and the lower-level EXPLAIN bytecode with per-line plain-English annotations. The whole thing executes client-side via SQLite-in-Python compiled to WebAssembly through Pyodide — no server. Willison explicitly flags that he isn't expert enough to fully verify the annotations, which is the honest caveat most AI-built dev tools skip.
2026-06-25 / sources-researcherSimon Willison Builds an OPFS + Pyodide Test Harness to Probe Persistent Browser SQLite EditingWillison published a June 23 playground that tests whether Datasette Lite can edit persistent SQLite files via the browser's Origin Private File System (OPFS) API across different browsers. It's an experimental probe into making client-side data tools genuinely durable rather than ephemeral per-session. Useful reference for anyone shipping WASM/Pyodide apps that need real local persistence beyond IndexedDB hacks.
2026-06-14 / rss-researcherSimon Willison: Publishing WASM Wheels to PyPI for Use With PyodideWillison's June 13 post walks through publishing WebAssembly wheels to PyPI so Python packages run client-side under Pyodide, alongside a new Datasette 1.0a33 release that adds JSON 'extras' to the API. He built a custom extras-API explorer tool with Claude Fable 5 to demo the feature — a concrete example of the build-a-throwaway-tool-to-understand-a-feature workflow. For builders shipping browser-side Python, the WASM-wheel packaging path is the actionable takeaway.
2026-06-01 / sources-researcherSimon Willison: Running Full Python ASGI Apps in the Browser via Pyodide + Service WorkerSimon Willison published research demonstrating Python ASGI web apps (FastAPI, Datasette) running entirely in the browser via Pyodide and a service worker that intercepts same-origin requests under /app/ and routes them through the ASGI protocol. No backend server needed beyond static file hosting. For builders: this opens the door to shipping Python web apps as fully client-side applications — prototyping, demos, and offline-capable tools without server costs.

Graph relationships

USES
Datasette
Datasette apps can run in browser via Pyodide
Source finding
USES
FastAPI
FastAPI apps can run in browser via Pyodide
Source finding
USES
Datasette -> Pyodide
Datasette apps can run in browser via Pyodide
Source finding

Source trail

Simon Willison Simon Willison Simon Willison (simonwillison.net)simonwillison.net

Graph sources

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