[shunkakinoki]

Summary

• hydrateCliproxyAuths ran aws s3 sync s3://.../auths/ -> local on every home-manager switch. s3 sync overwrites any local file whose size differs, regardless of which side is newer.
• The S3 copies lag the server's rotated Claude refresh tokens (the auth backup can't read some root-owned files the container writes), so on Oct 13 18:00 UTC kyber's three Claude auths were reverted to already-rotated refresh tokens -> invalid_grant: Refresh token not found or invalid -> full re-auth.
• Hydrate now only pulls when the local auth cache is empty, matching start.sh.

Test plan

• shellspec spec/cliproxyapi_backup_spec.sh (new case fails without the fix)
• shellcheck on hydrate.sh

Follow-up not in this PR: root-owned 0600 auth files written by the container are skipped by cliproxyapi-backup-auth, so S3 can still go stale.

🤖 Generated with Claude Code

---

Summary by cubic

Prevents Cliproxy API auth hydration from overwriting live credentials with stale S3 copies.

s3 sync ran on every home-manager switch and rewrote any local auth file whose size differed, even when the local file was newer. Because S3 can lag behind the server's rotated Claude refresh tokens, a single switch reverted all Claude auths to revoked tokens and forced a full re-auth. Hydration now pulls from S3 only when the local auth cache is empty, matching start.sh.

^{Written for commit 2fca61f. Summary will update on new commits.}

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📥 Commits

Reviewing files that changed from the base of the PR and between bb57fde and 2fca61f.

📒 Files selected for processing (2)

• home-manager/services/cliproxyapi/scripts/hydrate.sh
• spec/cliproxyapi_backup_spec.sh

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[cubic-dev-ai]

No issues found across 2 files

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[linear-code]

SHUN-16121