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[pull] main from facebook:main#385

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pull[bot] merged 1 commit into
LoadsAForks:mainfrom
react:main
Jan 24, 2026
Merged

[pull] main from facebook:main#385
pull[bot] merged 1 commit into
LoadsAForks:mainfrom
react:main

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@pull pull Bot commented Jan 24, 2026

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Created by pull[bot] (v2.0.0-alpha.4)

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## Overview

Adds a claude setup that works with the nested /compiler setup.

The constraints are:
- when working in the root repo, don't use the compiler configs (easy)
- when working in the compiler/ don't use the parent contigs (hard)

The first one is easy: there's a claude.md and .claude directory in
/compiler that is only loaded when you start a session from /compuler.
The second one is hard, because if you start a session from /compiler,
the parent claude files and skills are loaded.

I was able to deny the permissions to the parent skills in
settings.json, but the descriptions are still loaded into context and I
don't think that's avoidable.

To keep the parent claude file out of context, I created a hook hack: I
moved all the non-compiler claude file context to instructions.md and
added a SessionStart hook to cat the file into context if the cwd isn't
the /compiler. Works well, but won't show it as part of the `/context`
slash command.


## Skills

I also added a number of skills specific to the React repo:

| Skill | Description |
|-------|-------------|
| `/extract-errors` |  `yarn extract-errors` |
| `/feature-flags` | how feature flags work and `@gate`  |
| `/fix` | linc and prettier |
| `/flags` | `yarn flags` |
| `/flow` | `yarn flow <variant>` |
| `/test` | `yarn test-*` |
| `/verify` | `run all the lints/tests/flow to verify` |

### Example: Flow

| before | after |
|-----|-----|
| <img width="1076" height="442" alt="flow-before"
src="https://github.com/user-attachments/assets/73eec143-d0af-4771-b501-c9dc29cc09ac"
/> | <img width="1076" height="273" alt="flow-after"
src="https://github.com/user-attachments/assets/292d33af-1d98-4252-9c08-744b33e88b86"
/> |

### Example: Tests

| before | after |
|-----|-----|
| <img width="1048" height="607" alt="test-before"
src="https://github.com/user-attachments/assets/aa558ccf-2cee-4d22-b1f1-e4221c5a59dd"
/> | <img width="1075" height="359" alt="test-after"
src="https://github.com/user-attachments/assets/eb795392-6f46-403f-b9bb-8851ed790165"
/> |
@pull pull Bot locked and limited conversation to collaborators Jan 24, 2026
@pull pull Bot added the ⤵️ pull label Jan 24, 2026
@pull
pull Bot merged commit a056625 into LoadsAForks:main Jan 24, 2026
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