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[NoQA] Add React Compiler context to AI reviewer and improve general PERF-4 performance#76981

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mountiny merged 31 commits into
Expensify:mainfrom
software-mansion-labs:add-react-compiler-context-to-ai-reviewer
Dec 29, 2025
Merged

[NoQA] Add React Compiler context to AI reviewer and improve general PERF-4 performance#76981
mountiny merged 31 commits into
Expensify:mainfrom
software-mansion-labs:add-react-compiler-context-to-ai-reviewer

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@mateuuszzzzz

@mateuuszzzzz mateuuszzzzz commented Dec 8, 2025

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Explanation of Change

PR adds new tool that can be used by Claude to get extra React Compiler context from health-check script.
Additionally, it slightly refactors prompt to eliminate false positives reported by developers.

Fixed Issues

$ #75686 #74471
PROPOSAL:

Tests

Since this is change to AI reviewer that suppose to reduce false positives, adds react compiler context and overall aims to improve performance of executing PERF-4 rule it might be hard to define strict testing steps. Nevertheless, new script was added and should be tested.

  1. Basic invocation - Run on a valid file, verify JSON output with parentOptimized and childComponents, run without args or with invalid path, expect exit code 1
  2. Import types - Test on file with default, named, aliased (as), and namespace (* as) imports, verify all appear correctly in childComponents
  3. Platform variants - Run on component with .native.tsx/.ios.tsx variants, verify variants array includes all existing platforms
  4. . Re-exports - Test on file importing from barrel file (index.ts), verify sourcePath points to actual source, not re-export file
  5. External packages filtered - Confirm imports from react, lodash, etc. do NOT appear in childComponents
  6. Type imports filtered - Verify import type { X } and import { type X } are excluded from results

Offline tests

QA Steps

PR Author Checklist

  • I linked the correct issue in the ### Fixed Issues section above
  • I wrote clear testing steps that cover the changes made in this PR
    • I added steps for local testing in the Tests section
    • I added steps for the expected offline behavior in the Offline steps section
    • I added steps for Staging and/or Production testing in the QA steps section
    • I added steps to cover failure scenarios (i.e. verify an input displays the correct error message if the entered data is not correct)
    • I turned off my network connection and tested it while offline to ensure it matches the expected behavior (i.e. verify the default avatar icon is displayed if app is offline)
    • I tested this PR with a High Traffic account against the staging or production API to ensure there are no regressions (e.g. long loading states that impact usability).
  • I included screenshots or videos for tests on all platforms
  • I ran the tests on all platforms & verified they passed on:
    • Android: Native
    • Android: mWeb Chrome
    • iOS: Native
    • iOS: mWeb Safari
    • MacOS: Chrome / Safari
  • I verified there are no console errors (if there's a console error not related to the PR, report it or open an issue for it to be fixed)
  • I verified there are no new alerts related to the canBeMissing param for useOnyx
  • I followed proper code patterns (see Reviewing the code)
    • I verified that any callback methods that were added or modified are named for what the method does and never what callback they handle (i.e. toggleReport and not onIconClick)
    • I verified that comments were added to code that is not self explanatory
    • I verified that any new or modified comments were clear, correct English, and explained "why" the code was doing something instead of only explaining "what" the code was doing.
    • I verified any copy / text shown in the product is localized by adding it to src/languages/* files and using the translation method
      • If any non-english text was added/modified, I used JaimeGPT to get English > Spanish translation. I then posted it in #expensify-open-source and it was approved by an internal Expensify engineer. Link to Slack message:
    • I verified all numbers, amounts, dates and phone numbers shown in the product are using the localization methods
    • I verified any copy / text that was added to the app is grammatically correct in English. It adheres to proper capitalization guidelines (note: only the first word of header/labels should be capitalized), and is either coming verbatim from figma or has been approved by marketing (in order to get marketing approval, ask the Bug Zero team member to add the Waiting for copy label to the issue)
    • I verified proper file naming conventions were followed for any new files or renamed files. All non-platform specific files are named after what they export and are not named "index.js". All platform-specific files are named for the platform the code supports as outlined in the README.
    • I verified the JSDocs style guidelines (in STYLE.md) were followed
  • If a new code pattern is added I verified it was agreed to be used by multiple Expensify engineers
  • I followed the guidelines as stated in the Review Guidelines
  • I tested other components that can be impacted by my changes (i.e. if the PR modifies a shared library or component like Avatar, I verified the components using Avatar are working as expected)
  • I verified all code is DRY (the PR doesn't include any logic written more than once, with the exception of tests)
  • I verified any variables that can be defined as constants (ie. in CONST.ts or at the top of the file that uses the constant) are defined as such
  • I verified that if a function's arguments changed that all usages have also been updated correctly
  • If any new file was added I verified that:
    • The file has a description of what it does and/or why is needed at the top of the file if the code is not self explanatory
  • If a new CSS style is added I verified that:
    • A similar style doesn't already exist
    • The style can't be created with an existing StyleUtils function (i.e. StyleUtils.getBackgroundAndBorderStyle(theme.componentBG))
  • If new assets were added or existing ones were modified, I verified that:
    • The assets are optimized and compressed (for SVG files, run npm run compress-svg)
    • The assets load correctly across all supported platforms.
  • If the PR modifies code that runs when editing or sending messages, I tested and verified there is no unexpected behavior for all supported markdown - URLs, single line code, code blocks, quotes, headings, bold, strikethrough, and italic.
  • If the PR modifies a generic component, I tested and verified that those changes do not break usages of that component in the rest of the App (i.e. if a shared library or component like Avatar is modified, I verified that Avatar is working as expected in all cases)
  • If the PR modifies a component related to any of the existing Storybook stories, I tested and verified all stories for that component are still working as expected.
  • If the PR modifies a component or page that can be accessed by a direct deeplink, I verified that the code functions as expected when the deeplink is used - from a logged in and logged out account.
  • If the PR modifies the UI (e.g. new buttons, new UI components, changing the padding/spacing/sizing, moving components, etc) or modifies the form input styles:
    • I verified that all the inputs inside a form are aligned with each other.
    • I added Design label and/or tagged @Expensify/design so the design team can review the changes.
  • If a new page is added, I verified it's using the ScrollView component to make it scrollable when more elements are added to the page.
  • I added unit tests for any new feature or bug fix in this PR to help automatically prevent regressions in this user flow.
  • If the main branch was merged into this PR after a review, I tested again and verified the outcome was still expected according to the Test steps.

Screenshots/Videos

Android: Native
Android: mWeb Chrome
iOS: Native
iOS: mWeb Safari
MacOS: Chrome / Safari

@codecov

codecov Bot commented Dec 8, 2025

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Codecov Report

✅ All modified and coverable lines are covered by tests.
see 2073 files with indirect coverage changes

mateuuszzzzz and others added 23 commits December 8, 2025 14:01
- Reduce PERF-4 from ~230 lines to ~60 lines while preserving all information
- Add "Applies ONLY to" section to prevent flagging code in callbacks
- Fix decision flow order: parent optimized → custom comparator → child memoized
- Simplify examples from 6 to 3 (Flag, Skip-comparator, Skip-optimized)
- Add note: "File not found" → Assume parent is optimized and skip PERF-4

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
…hecking

- Script now outputs sourcePath for each child component variant
- Updated decision flow step 2 with explicit instructions to use sourcePath
- Claude can now read child's source file to check for custom memo comparators

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Changed from "MANDATORY for ANY potential PERF-4" to
"YOU MUST call on EVERY .tsx file from the diff"

This removes ambiguity - Claude must run the script on all files,
not decide which files might need it.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
@mateuuszzzzz mateuuszzzzz changed the title Add React Compiler context to AI reviewer. Add React Compiler context to AI reviewer and improve general PERF-4 performance Dec 16, 2025
@mateuuszzzzz mateuuszzzzz marked this pull request as ready for review December 16, 2025 16:52
@mountiny mountiny changed the title Add React Compiler context to AI reviewer and improve general PERF-4 performance [NoQA] Add React Compiler context to AI reviewer and improve general PERF-4 performance Dec 16, 2025
@mountiny

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@abdulrahuman5196 Do you want to review/ test this? what is your ETA if yes?

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@kacper-mikolajczak kacper-mikolajczak left a comment

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Overall LGTM and left couple of comments where I feel like need more clarification.

Thanks Mateusz!

Comment thread .claude/scripts/checkReactCompilerOptimization.ts
Comment thread .claude/agents/code-inline-reviewer.md Outdated
Comment thread .claude/agents/code-inline-reviewer.md
Comment thread .claude/scripts/checkReactCompilerOptimization.ts
@mountiny mountiny requested a review from chrispader December 19, 2025 11:37

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LGTM overall, i just have a few minor questions

Comment thread .claude/scripts/checkReactCompilerOptimization.js Outdated
Comment thread .claude/agents/code-inline-reviewer.md Outdated
Comment thread .claude/scripts/checkReactCompilerOptimization.sh Outdated
Comment thread .claude/scripts/checkReactCompilerOptimization.sh Outdated
Comment thread .claude/agents/code-inline-reviewer.md
Comment thread .claude/scripts/checkReactCompilerOptimization.js Outdated

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LGTM! Thanks for migrating the script to TypeScript 🙌🏼

Comment thread .claude/agents/code-inline-reviewer.md
@abdulrahuman5196

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@mateuuszzzzz Is there a way to check if this change is working properly?

@mateuuszzzzz

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@mateuuszzzzz Is there a way to check if this change is working properly?

If you ask about AI reviewer itself then I believe we need to see how it performs on future PRs.

But in PR details I included steps for testing new tool we added: .claude/scripts/checkReactCompilerOptimization.ts

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Awesome we are so close to get this ready 🚀

@mountiny

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Reviewer Checklist

  • I have verified the author checklist is complete (all boxes are checked off).
  • I verified the correct issue is linked in the ### Fixed Issues section above
  • I verified testing steps are clear and they cover the changes made in this PR
    • I verified the steps for local testing are in the Tests section
    • I verified the steps for Staging and/or Production testing are in the QA steps section
    • I verified the steps cover any possible failure scenarios (i.e. verify an input displays the correct error message if the entered data is not correct)
    • I turned off my network connection and tested it while offline to ensure it matches the expected behavior (i.e. verify the default avatar icon is displayed if app is offline)
  • I checked that screenshots or videos are included for tests on all platforms
  • I included screenshots or videos for tests on all platforms
  • I verified that the composer does not automatically focus or open the keyboard on mobile unless explicitly intended. This includes checking that returning the app from the background does not unexpectedly open the keyboard.
  • I verified tests pass on all platforms & I tested again on:
    • Android: HybridApp
    • Android: mWeb Chrome
    • iOS: HybridApp
    • iOS: mWeb Safari
    • MacOS: Chrome / Safari
    • MacOS: Desktop
  • If there are any errors in the console that are unrelated to this PR, I either fixed them (preferred) or linked to where I reported them in Slack
  • I verified there are no new alerts related to the canBeMissing param for useOnyx
  • I verified proper code patterns were followed (see Reviewing the code)
    • I verified that any callback methods that were added or modified are named for what the method does and never what callback they handle (i.e. toggleReport and not onIconClick).
    • I verified that comments were added to code that is not self explanatory
    • I verified that any new or modified comments were clear, correct English, and explained "why" the code was doing something instead of only explaining "what" the code was doing.
    • I verified any copy / text shown in the product is localized by adding it to src/languages/* files and using the translation method
    • I verified all numbers, amounts, dates and phone numbers shown in the product are using the localization methods
    • I verified any copy / text that was added to the app is grammatically correct in English. It adheres to proper capitalization guidelines (note: only the first word of header/labels should be capitalized), and is either coming verbatim from figma or has been approved by marketing (in order to get marketing approval, ask the Bug Zero team member to add the Waiting for copy label to the issue)
    • I verified proper file naming conventions were followed for any new files or renamed files. All non-platform specific files are named after what they export and are not named "index.js". All platform-specific files are named for the platform the code supports as outlined in the README.
    • I verified the JSDocs style guidelines (in STYLE.md) were followed
  • If a new code pattern is added I verified it was agreed to be used by multiple Expensify engineers
  • I verified that this PR follows the guidelines as stated in the Review Guidelines
  • I verified other components that can be impacted by these changes have been tested, and I retested again (i.e. if the PR modifies a shared library or component like Avatar, I verified the components using Avatar have been tested & I retested again)
  • I verified all code is DRY (the PR doesn't include any logic written more than once, with the exception of tests)
  • I verified any variables that can be defined as constants (ie. in CONST.ts or at the top of the file that uses the constant) are defined as such
  • If a new component is created I verified that:
    • A similar component doesn't exist in the codebase
    • All props are defined accurately and each prop has a /** comment above it */
    • The file is named correctly
    • The component has a clear name that is non-ambiguous and the purpose of the component can be inferred from the name alone
    • The only data being stored in the state is data necessary for rendering and nothing else
    • For Class Components, any internal methods passed to components event handlers are bound to this properly so there are no scoping issues (i.e. for onClick={this.submit} the method this.submit should be bound to this in the constructor)
    • Any internal methods bound to this are necessary to be bound (i.e. avoid this.submit = this.submit.bind(this); if this.submit is never passed to a component event handler like onClick)
    • All JSX used for rendering exists in the render method
    • The component has the minimum amount of code necessary for its purpose, and it is broken down into smaller components in order to separate concerns and functions
  • If any new file was added I verified that:
    • The file has a description of what it does and/or why is needed at the top of the file if the code is not self explanatory
  • If a new CSS style is added I verified that:
    • A similar style doesn't already exist
    • The style can't be created with an existing StyleUtils function (i.e. StyleUtils.getBackgroundAndBorderStyle(theme.componentBG)
  • If the PR modifies code that runs when editing or sending messages, I tested and verified there is no unexpected behavior for all supported markdown - URLs, single line code, code blocks, quotes, headings, bold, strikethrough, and italic.
  • If the PR modifies a generic component, I tested and verified that those changes do not break usages of that component in the rest of the App (i.e. if a shared library or component like Avatar is modified, I verified that Avatar is working as expected in all cases)
  • If the PR modifies a component related to any of the existing Storybook stories, I tested and verified all stories for that component are still working as expected.
  • If the PR modifies a component or page that can be accessed by a direct deeplink, I verified that the code functions as expected when the deeplink is used - from a logged in and logged out account.
  • If the PR modifies the UI (e.g. new buttons, new UI components, changing the padding/spacing/sizing, moving components, etc) or modifies the form input styles:
    • I verified that all the inputs inside a form are aligned with each other.
    • I added Design label and/or tagged @Expensify/design so the design team can review the changes.
  • If a new page is added, I verified it's using the ScrollView component to make it scrollable when more elements are added to the page.
  • For any bug fix or new feature in this PR, I verified that sufficient unit tests are included to prevent regressions in this flow.
  • If the main branch was merged into this PR after a review, I tested again and verified the outcome was still expected according to the Test steps.
  • I have checked off every checkbox in the PR reviewer checklist, including those that don't apply to this PR.

Screenshots/Videos

Android: HybridApp
Android: mWeb Chrome
iOS: HybridApp
iOS: mWeb Safari
MacOS: Chrome / Safari
MacOS: Desktop

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Thanks, lets give it a try now, we should keep in eye on the actions time after this is merge

@mountiny mountiny merged commit 6ceced8 into Expensify:main Dec 29, 2025
29 of 31 checks passed
@OSBotify

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✋ This PR was not deployed to staging yet because QA is ongoing. It will be automatically deployed to staging after the next production release.

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🚀 Deployed to staging by https://github.com/mountiny in version: 9.2.89-1 🚀

platform result
🖥 desktop 🖥 success ✅
🕸 web 🕸 success ✅
🤖 android 🤖 success ✅
🍎 iOS 🍎 success ✅

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🚀 Deployed to production by https://github.com/thienlnam in version: 9.2.89-6 🚀

platform result
🖥 desktop 🖥 failure ❌
🕸 web 🕸 success ✅
🤖 android 🤖 success ✅
🍎 iOS 🍎 success ✅

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6 participants