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[NoQA] AI reviewer philosophy guide#79144

Merged
AndrewGable merged 7 commits intoExpensify:mainfrom
callstack-internal:feat/ai-reviewer-philosophy-guide
Jan 13, 2026
Merged

[NoQA] AI reviewer philosophy guide#79144
AndrewGable merged 7 commits intoExpensify:mainfrom
callstack-internal:feat/ai-reviewer-philosophy-guide

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@kacper-mikolajczak
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@kacper-mikolajczak kacper-mikolajczak commented Jan 8, 2026

Explanation of Change

Create an AI Reviewer document that defines guiding principles, setup and general philosophy behind introducing AI review to the App.

Fixed Issues

$ #79340
PROPOSAL:

Tests

  • Verify that no errors appear in the JS console

Offline tests

QA Steps

// TODO: These must be filled out, or the issue title must include "[No QA]."

  • Verify that no errors appear in the JS console

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

@kacper-mikolajczak
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@tgolen, sorry automatic reviewer assignment kicked in! Please dismiss the notification on review or leave a couple of words if you'd like to - always appreciated ❤️

When AI reviewers flag potential issues, human reviewers should verify the feedback is accurate and applicable before asking contributors to make changes. This prevents unnecessary work from false positives.

### Report false positives to maintainers
When AI feedback is incorrect or not applicable, reach out to the AI reviewer maintainers to help improve the system. You can either tag them directly in a reply to the reviewer's comment or reach out through Slack. This feedback helps refine the reviewers and prevents the same issues from recurring.
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Tag who? 😄

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@kacper-mikolajczak kacper-mikolajczak Jan 12, 2026

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Haha, the AI reviewer maintainers! We've decided to make a note on that with @AndrewGable to make people more eager to tag anyone who is actually related to the reviewer.

How would you like to re-phrase that to make it more clear? ❤️

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I wonder if it is clear to the public who the people responsible for maintaining AI are

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Proper remark! How do you think it should be approached?

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We could create github team for AI Maintainers. It should allow users to mark all people included with a single mention. e.g. @Expensify/ai-maintainers

What do you think @mountiny?

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We could do that @AndrewGable what do you think?

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I think we should just say "Reach out in the #expensify-open-source Slack channel" and it will get escalated to the right people in there.

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@kacper-mikolajczak kacper-mikolajczak Jan 13, 2026

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It depends on whether we want to keep burden on Vit being a middle-man, as he will likely be the one to redirect the message to us. With a GH team, we can skip this step (and Slack altogether, which could be desired or not depending on situation).

For now, just to keep the momentum, I adjusted instructions to reach out to Slack as Andrew suggested - we can change it accordingly anytime!

Comment on lines +52 to +55
**deploy-blocker-investigator**
- Investigates deploy blocker issues to identify the causing PR
- Posts findings and recommendations on the issue
- See `.claude/agents/deploy-blocker-investigator.md` for investigation process
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Does this run now?

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@kacper-mikolajczak kacper-mikolajczak Jan 12, 2026

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Yup, but it was merged with manual trigger (workflow-dispatch):

I will add proper info about the triggers as you suggested in other comment 👍

1. **Smart Linter (code-inline-reviewer)**: Catches specific, well-defined performance anti-patterns with consistent, rule-based feedback
2. **Holistic Reviewer**: Catches general code quality issues, design concerns, and anything not covered by specific rules

Together they balance precision (rules) with coverage (holistic review).
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Maybe something about how to trigger each of these? you need to mark the pr as ready for a review or draft it and undraft it again if you want to get a re-review

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@kacper-mikolajczak kacper-mikolajczak Jan 12, 2026

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Thanks, added!

@mountiny mountiny requested a review from AndrewGable January 8, 2026 21:37
Comment on lines +17 to +18
### Validate AI feedback before requesting changes
When AI reviewers flag potential issues, human reviewers should verify the feedback is accurate and applicable before asking contributors to make changes. This prevents unnecessary work from false positives.
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This is a good idea, but we need to make sure it is well communicated to the reviewers. Otherwise, everything will be just ignored.

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@kacper-mikolajczak kacper-mikolajczak Jan 12, 2026

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Agree! I re-phrased it to focus on vague cases only, thanks!

@kacper-mikolajczak
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Hi @mountiny @adamgrzybowski, thanks for the review!

Here's a summary of what was changed based on your feedback (+ "Why" section idea):

  • 1ef988f Added a new "Why" section explaining the rationale behind AI code reviewers
  • 78c50e9 Expanded documentation with trigger information and workflow details for when AI reviewers run
  • 30a997e Refined wording to encourage discussion on vague feedback and broadened scope beyond just "performance" issues

@kacper-mikolajczak kacper-mikolajczak marked this pull request as ready for review January 12, 2026 12:08
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@kacper-mikolajczak Can you please link the PR to the correct issue and update the PR body? can you also please fix the spell check action?

@kacper-mikolajczak kacper-mikolajczak changed the title AI reviewer philosophy guide [NoQA] AI reviewer philosophy guide Jan 12, 2026
@kacper-mikolajczak kacper-mikolajczak requested a review from a team as a code owner January 12, 2026 13:27
@melvin-bot melvin-bot bot requested review from shubham1206agra and removed request for a team January 12, 2026 13:27
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melvin-bot bot commented Jan 12, 2026

@shubham1206agra Please copy/paste the Reviewer Checklist from here into a new comment on this PR and complete it. If you have the K2 extension, you can simply click: [this button]

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kacper-mikolajczak commented Jan 12, 2026

@kacper-mikolajczak Can you please link the PR to the correct issue and update the PR body? can you also please fix the spell check action?

@mountiny Linked and fixed the spell check (by adding helpdot word to cspell dict) ✅

tgolen
tgolen previously approved these changes Jan 12, 2026
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I found the flowchart difficult to understand, so it didn't add a whole lot of value for me. I think the most important part of this doc is how each one is triggered or re-triggered, so I would try to bring as much focus to that as you can.

AndrewGable
AndrewGable previously approved these changes Jan 12, 2026
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All the requested changes were address and I think we can merge this one 🚀

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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 tests pass on all platforms & I tested again on:
    • Android: Native
    • Android: mWeb Chrome
    • iOS: Native
    • 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 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 the left part of a conditional rendering a React component is a boolean and NOT a string, e.g. myBool && <MyComponent />.
    • 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.js 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.
  • 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: Native
Android: mWeb Chrome
iOS: Native
iOS: mWeb Safari
MacOS: Chrome / Safari
MacOS: Desktop

@AndrewGable AndrewGable merged commit e95e527 into Expensify:main Jan 13, 2026
16 of 19 checks passed
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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/AndrewGable in version: 9.3.1-0 🚀

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

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🚀 Deployed to production by https://github.com/francoisl in version: 9.3.1-1 🚀

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

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6 participants