chore: add codeowners (FXC-3880)

[yaugenst-flex]

Prompted by recent discussions I think it'd be good to establish this. Let's iterate on the list, I just put down the ones I think are quite clear (to me) currently.

Greptile Overview

Updated On: 2025-10-29 16:02:42 UTC

Greptile Summary

Adds a CODEOWNERS file to establish code ownership for key areas of the codebase. The file assigns ownership for configuration management, autograd components, dispersion fitting, EME simulation, and CI/CD workflows.

• tidy3d/config/ → @yaugenst-flex
• tidy3d/components/autograd/ → @yaugenst-flex, @tylerflex, @groberts-flex
• tidy3d/components/dispersion_fitter.py → @caseyflex
• tidy3d/components/eme/ → @caseyflex
• .github/workflows/ → @daquinteroflex

All paths referenced in the file exist, all GitHub usernames are valid contributors, and the ownership assignments align well with actual contribution history.

Confidence Score: 5/5

• This PR is safe to merge with no risk - it only adds a configuration file
• The CODEOWNERS file is a simple GitHub configuration file that doesn't affect runtime code. All paths are valid, usernames exist, and ownership assignments are reasonable based on contribution history. No functional code changes.
• No files require special attention

Important Files Changed

File Analysis

Filename	Score	Overview
.github/CODEOWNERS	5/5	Added CODEOWNERS file defining code ownership for config, autograd, dispersion fitter, EME, and workflows directories. All paths exist and owners align with contribution history.

Sequence Diagram

sequenceDiagram
    participant Dev as Developer
    participant GH as GitHub
    participant Owners as Code Owners
    
    Dev->>GH: Create PR affecting owned files
    GH->>GH: Parse .github/CODEOWNERS
    GH->>Owners: Request review from owners
    Note over GH,Owners: Auto-requests based on:<br/>config/ → yaugenst-flex<br/>autograd/ → yaugenst-flex, tylerflex, groberts-flex<br/>dispersion_fitter.py → caseyflex<br/>eme/ → caseyflex<br/>workflows/ → daquinteroflex
    Owners->>GH: Provide review
    GH->>Dev: Review feedback

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[greptile-apps]

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[github-actions]

Diff Coverage

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