[eas-cli] share agent templates from llm-configs

[davidmokos]

Syncs the generated app AGENTS.md and CLAUDE.md templates from expo/llm-configs during EAS CLI prepack, before the package is rebuilt for publishing. Keeps the synced templates bundled in EAS CLI so eas project:new still works offline and does not add a runtime @expo/llm-configs dependency.

Verified with yarn workspace eas-cli sync-agent-templates, byte-for-byte comparison against the upstream raw files, yarn workspace eas-cli test src/commandUtils/new/__tests__/projectFiles.test.ts --runInBand, yarn workspace eas-cli typecheck-for-build, and yarn workspace eas-cli build. Previously also ran a local eas project:new smoke test and confirmed generated agent files matched the shared templates.

[github-actions]

Subscribed to pull request

File Patterns	Mentions
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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 58.45%. Comparing base (51aceb1) to head (62f3c48).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3865      +/-   ##
==========================================
- Coverage   58.48%   58.45%   -0.03%     
==========================================
  Files         919      922       +3     
  Lines       40115    40199      +84     
  Branches     8448     8462      +14     
==========================================
+ Hits        23458    23493      +35     
- Misses      16561    16610      +49     
  Partials       96       96              

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[Kudo]

side question: could we fetch the doc from github.com/expo/llm-configs/blob/main/expo-app/AGENTS.md directly? we could always get latest agents.md without publishing eas-cli

[davidmokos]

There are drawbacks - it would make offline creation, GitHub outage, proxy issues, or timeout produce no agent files. IMHO project creation should not depend on GitHub raw being reachable, bundled fallback is the safer design. What do you think?

[Kudo]

that's a good point. in this case, how about to sync files in prepublish phase? we still fetch CLAUDE.md/AGENTS.md from llm_configs, and overwrites existing templates.

some advantages for this approach:

• reduce llm_configs deps overhead. the repo may contain other files that are not used by eas-cli.
• whenever we update to llm_configs, next time when eas-cli published, we get the latest one automatically.
• still have offline support.

[github-actions]

✅ Thank you for adding the changelog entry!

[davidmokos]

I like that approach! Updated the PR