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A drawer running mat3ra.made.tools in-browser via Pyodide. Materials bind in as materials_in/material before each run; Material variables sync back after, merged by materialsSyncScope: round-tripped ids upsert in place, REPL-created materials replace the previous python-repl batch, everything else untouched. One repo, no new npm dependencies: the editor and drawer come from published cove, the environment recipe is one constants file mirroring AX's made profile, and the host bridge is ~20 lines of inline Python pending a released notebooks-utils. Wheels that do not build under Pyodide are provisioned to public/repl-wheels on prestart/prebuild and served same-origin. Pyodide loads with an explicit indexURL: the bundled node polyfills make its own asset detection resolve to a filesystem path (caught by the e2e). Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Each interim solution now carries a TODO(repl-vN) naming where it moves and what deletes it, anchored to the ladder in agents/plan/, so nothing temporary can outlive its step unnoticed. grep -rn "TODO(repl-" src scripts lists them. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
The REPL panel becomes an iframe of github.com/mat3ra/pyodide-repl, driven
over the same data bridge as the JupyterLite session: get-data answers with
{materials, selectedIndex}, set-data payloads route into materialsSyncScope,
which is unchanged. All Pyodide and Python concerns leave this repo — the
environment, the wheels and their provisioning script, and the dead
PythonTransformation dialog (the last consumer of cove's PyodideLoader).
The e2e keeps the same assertions, driving the embedded page cross-origin
like the JupyterLite specs; tagged @ignore in CI until a shared deploy
exists to embed. Verified locally against a vite preview of the built page:
46 s to a passing run.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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The REPL page knows no domain: everything material-specific now travels to
it as configuration over the bridge — the package lists, the Python that
binds materials_in/material from this app's data, and the scan that produces
the {syncScope, entities} payload the reducer merges. It lives in
madeReplConfig and reaches the panel as a prop, so a host can swap it.
Wheels come straight from the JupyterLite deploy that already hosts them
(it sends access-control-allow-origin: *), so nothing in this stack
provisions or serves wheels any more.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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What
The smallest working Python REPL: a View → Python REPL drawer running
mat3ra.made.toolsin-browser via Pyodide. Materials bind in asmaterials_in/materialbefore each run; anyMaterialvariable syncs back after, merged by one reducer rule (materialsSyncScope): round-tripped ids upsert in place, REPL-created materials replace the previouspython-replbatch, hand-made materials are never touched.One repo, 14 files, ~700 lines, no new npm dependencies. The editor and drawer come from published cove; the environment recipe is one constants file mirroring AX's
madeprofile; the host bridge is ~20 lines of inline Python, marked temporary pending a released notebooks-utils.Deliberately omitted (each a later, separate PR): autocomplete, editable requirements, preloading, structured tracebacks, any cove/AX change. Architecture memo with the full build ladder:
plan/repl-minimal-architecture.md.How it's tested
tests/cypress/e2e/repl/python-repl.feature— the same pattern as the JupyterLite session: drive the panel against a real interpreter, assert the materials that come back, including the two merge invariants (derived material never inherits its source_id; selection survives a scope replacement). Passing locally in 52 s.Notes for review
pymatgen,spglib,pydantic) are downloaded topublic/repl-wheels(gitignored) onprestart/prebuildand served same-origin — browsers block cross-origin wheel fetches without CORS. Host apps embedding MD serve the same path or passreplWheelBaseUrl.indexURL: the bundled node polyfills make its own asset detection resolve to a filesystem path (the e2e caught this against cove'sPyodideLoader).🤖 Generated with Claude Code