[compiler] Claude file/settings #35523
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This was referenced Jan 16, 2026
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compiler/.claude/settings.local.json
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I think we want to add settings.local.json to gitignore since it's user specific, and we could have a settings.json if there's some setting we want to share
This was referenced Jan 22, 2026
Initializes CLAUDE.md and a settings file for the compiler/ directory to help use claude with the compiler. Note that some of the commands here depend on changes to snap from the next PR.
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A whole bunch of changes to snap aimed at making it more usable for
humans and agents. Here's the new CLI interface:
```
node dist/main.js --help
Options:
--version Show version number [boolean]
--sync Run compiler in main thread (instead of using worker
threads or subprocesses). Defaults to false.
[boolean] [default: false]
--worker-threads Run compiler in worker threads (instead of
subprocesses). Defaults to true.
[boolean] [default: true]
--help Show help [boolean]
-w, --watch Run compiler in watch mode, re-running after changes
[boolean]
-u, --update Update fixtures [boolean]
-p, --pattern Optional glob pattern to filter fixtures (e.g.,
"error.*", "use-memo") [string]
-d, --debug Enable debug logging to print HIR for each pass[boolean]
```
Key changes:
* Added abbreviations for common arguments
* No more testfilter.txt! Filtering/debugging works more like Jest, see
below.
* The `--debug` flag (`-d`) controls whether to emit debug information.
In watch mode, this flag sets the initial debug value, and it can be
toggled by pressing the 'd' key while watching.
* The `--pattern` flag (`-p`) sets a filter pattern. In watch mode, this
flag sets the initial filter. It can be changed by pressing 'p' and
typing a new pattern, or pressing 'a' to switch to running all tests.
* As before, we only actually enable debugging if debug mode is enabled
_and_ there is only one test selected.
---
[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/facebook/react/pull/35537).
* #35607
* #35298
* #35596
* #35573
* #35595
* #35539
* __->__ #35537
* #35523
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Initializes CLAUDE.md and a settings file for the compiler/ directory to help use claude with the compiler. Note that some of the commands here depend on changes to snap from the next PR.
Stack created with Sapling. Best reviewed with ReviewStack.
finallyclauses #35607