Summary

Phase 1 of the Pyodide-target conformance flow (spec: docs/superpowers/specs/2026-06-16-pyodide-conformance-flow-design.md, §5). Gives the repo its first push/PR CI so Python-version/typing regressions are caught at the source instead of in the browser (the transpiler runs client-side via Pyodide → CPython 3.14).

• .github/workflows/test.yml — pytest matrix on CPython 3.11–3.14, fail-fast: false, PYTHONHASHSEED=0, SHA-pinned actions (matching release.yml), least-privilege permissions, concurrency cancel.
• tests/test_import_all.py — floor-guard: imports every pineforge_codegen submodule. Uses an onerror callback so a broken sub-package __init__ surfaces (not silently skipped) and a min-count guard against a vacuous pass. On the 3.11 leg this catches 3.12+ syntax in modules no other test imports.
• pyproject.toml — declare Python 3.14 support (classifier); fix a stale deploy-worker.yml → release.yml comment.

Engine-dependent compile tests skip on CI (no engine checkout / Eigen / compiler env) — verified via the have_compile_env() skip logic.

Test plan

• test.yml runs green across 3.11 / 3.12 / 3.13 / 3.14 on this PR (the first real run — proves 3.11/3.12, unavailable locally).
• Local: full suite 968 passed / 1 skipped on 3.13 and 3.14 (compile tests excluded — they skip on runners; the same compile cases also fail on main locally, i.e. pre-existing env artifact, not introduced here).

🤖 Generated with Claude Code