v0.9.2 Pre-release thread

[adhami3310]

Please report any problems you encounter in this discussion thread or as separate issues on reflex-dev/reflex.

pip install 'reflex~=0.9.2a'

Schedule

2026-05-04 13:00 PT: 0.9.2a1 pre-release published for testing
2026-05-05 12:00 PT: 0.9.2a2 pre-release published
2026-05-05: Planned Public release of 0.9.2

Release Notes

Rewriting the frontend compiler to be plugin-based

• Add compiler plugin hooks and plugins and move compilation pipeline out of App by @FarhanAliRaza in Add compiler plugin hooks and plugins and move compilation pipeline out of App #6260

Drop JSON5 frontend dependency

• refactor: drop json5 dep, handle non-finite floats in socket parse fallback by @FarhanAliRaza in refactor: drop json5 dep, handle non-finite floats in socket parse fallback #6339

Deprecate rx.Model

Use sqlAlchemy/sqlmodel directly.

• deprecate rx Model by @adhami3310 in deprecate rx Model #6442

Bugfxies

• ENG-9425: fixes for extensible BaseState by @masenf in ENG-9425: fixes for extensible BaseState #6418
• fix: segmented_control indicator renders for >10 items by @FarhanAliRaza in fix: segmented_control indicator renders for >10 items #6344
• fix: reject string CodeBlock theme to surface invalid values at create time by @FarhanAliRaza in fix: reject string CodeBlock theme to surface invalid values at create time #6419
• fix(hosting-cli): make ScaleParams.as_json() side-effect free by @BABTUNA in fix(hosting-cli): make ScaleParams.as_json() side-effect free #6415
• fix: dynamically report backend_host in terminal logs by @Krishnachaitanyakc in fix: dynamically report backend_host in terminal logs #6222
• fix: emit valid JS for DestructuredArg with only a rest field by @FarhanAliRaza in fix: emit valid JS for DestructuredArg with only a rest field #6444
• Return the true value of an AsyncComputedVar when called via get_var_value() by @riebecj in Return the true value of an AsyncComputedVar when called via get_var_value() #6391
• Deepcopy EventSpec args when creating Event.from_event_type by @masenf in Deepcopy EventSpec args when creating Event.from_event_type #6458
• Do not memoize parent component of Foreach by @masenf in Do not memoize parent component of Foreach #6454
• Make memo tag determination based on memoized component by @masenf in Make memo tag determination based on memoized component #6453
• fix(config): normalize Config.plugins entries with clear errors (Error message when passing Plugin class in rx.Config is terrible #6440) by @ChinmayShringi in fix(config): normalize Config.plugins entries with clear errors (#6440) #6445

Docs

• ENG-9029: EventHandlerAPIPlugin (enterprise) docs by @masenf in ENG-9029: EventHandlerAPIPlugin (enterprise) docs #6370
• Fix headings href by @carlosabadia in Fix headings href #6397
• create python module that just has all markdown files by @adhami3310 in create python module that just has all markdown files #6398
• fix: drop temporal=True from fetch_recent_blogs by @Kastier1 in fix: drop temporal=True from fetch_recent_blogs #6399
• Point navbar Reflex Framework link to /open-source by @Kastier1 in Point navbar Reflex Framework link to /open-source #6400
• fix(docs): dropdown bg in dark mode, MCP sidebar sync, Safari copy by @Alek99 in fix(docs): dropdown bg in dark mode, MCP sidebar sync, Safari copy #6402
• remove unneeded escapes by @adhami3310 in remove unneeded escapes #6403
• delete weird arrow by @adhami3310 in delete weird arrow #6406
• Fix doc popover transparent background and contrast by @carlosabadia in Fix doc popover transparent background and contrast #6407
• fix double docs/ route on os templates by @carlosabadia in fix double docs/ route on os templates #6409
• Generate docs llms index by @Alek99 in Generate docs llms index #6401
• remove hardcoded deploy_url by @carlosabadia in remove hardcoded deploy_url #6410
• Fix docs llms index links by @Alek99 in Fix docs llms index links #6412
• update mcp docs by @adhami3310 in update mcp docs #6426
• Fix broken docs links and updates for agents by @carlosabadia in Fix broken docs links and updates for agents #6420
• docs: redesign API Reference (interactive demo + props table polish) by @Alek99 in docs: redesign API Reference (interactive demo + props table polish) #6387
• Improve docs props table by @Alek99 in Improve docs props table #6423
• Refactor docs sidebar to frontend state by @Alek99 in Refactor docs sidebar to frontend state #6430
• use images from integration docs package instead of github by @carlosabadia in use images from integration docs package instead of github #6435
• Add AG Grid theme customization guide to documentation by @masenf in Add AG Grid theme customization guide to documentation #6432
• Fix docs sidebar guide alignment by @Alek99 in Fix docs sidebar guide alignment #6431
• Add checks for broken docs urls by @carlosabadia in Add checks for broken docs urls #6448

Chores

• No 10 by @masenf in No 10 #6434
• Fix flakiness in integration/test_upload by @masenf in Fix flakiness in integration/test_upload #6424
• [fix]: error "_supports_virtual_terminal" is not a known attribute of module "nt" by @qubydev in [fix]: error "_supports_virtual_terminal" is not a known attribute of module "nt" #6439
• Add benchmark for creating Event objects by @masenf in Add benchmark for creating Event objects #6455

New Contributors

• @qubydev made their first contribution in [fix]: error "_supports_virtual_terminal" is not a known attribute of module "nt" #6439
• @Krishnachaitanyakc made their first contribution in fix: dynamically report backend_host in terminal logs #6222
• @ChinmayShringi made their first contribution in fix(config): normalize Config.plugins entries with clear errors (#6440) #6445

Full Changelog: v0.9.1...v0.9.2a1