Add env var uppercase validation

[benedikt-bartscher]

No description provided.

[greptile-apps]

Greptile Summary

This PR enforces uppercase environment-variable names at EnvVar construction time.

• Adds an unconditional ValueError for lowercase or mixed-case names.
• Adds unit coverage for accepted and rejected names.

Confidence Score: 4/5

The PR is not yet safe to merge because the previously reported hard break for existing lowercase or mixed-case EnvVar names remains.

The current constructor still raises immediately for names previously accepted by the public EnvVar API, and no deprecation warning, normalization, or fallback preserves compatibility for downstream callers.

Files Needing Attention: packages/reflex-base/src/reflex_base/environment.py

Important Files Changed

Filename	Overview
packages/reflex-base/src/reflex_base/environment.py	Adds strict uppercase-name validation to EnvVar construction, while the previously reported compatibility break remains.
tests/units/test_environment.py	Adds parameterized tests confirming rejection of non-uppercase names and acceptance of uppercase names.

_{Reviews (2): Last reviewed commit: "Merge remote-tracking branch 'upstream/m..." | Re-trigger Greptile}

[greptile-apps]

Hard break for existing names

When downstream code constructs EnvVar through reflex.config.EnvVar or reflex_base.environment.EnvVar with an existing lowercase or mixed-case name, this unconditional check raises ValueError, causing application initialization or startup to fail without the required deprecation and fallback period.

Context Used: CLAUDE.md (source)

Knowledge Base Used: Config and Environment System

[codspeed-hq]

Merging this PR will not alter performance

✅ 26 untouched benchmarks
⏩ 8 skipped benchmarks¹

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_{Comparing benedikt-bartscher:add-env-var-uppercase-validation (933b47b) with main (a08a061)}

Footnotes

1. 8 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[chatgpt-codex-connector]

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