Reload auth storage after Codex account switch

[S2P2]

Summary

• reload pi's in-memory auth storage after swapping auth.json during /codex switch
• refresh the model registry before ctx.reload() so the current process picks up the switched Codex account

Why

ctx.reload() reloads extensions/resources, but pi keeps auth.json cached in AuthStorage. Without reloading that cache, the process can keep using the previous Codex credential until pi fully exits and starts again.

Testing

• bun run typecheck
• bun test

Summary by CodeRabbit

• Bug Fixes
  • Improved the credential-switching experience so the app refreshes immediately after changing the active Codex credential.
  • Fixed an issue where the app could keep using stale authentication state after a switch, causing reloads to feel incomplete.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 30865d2b-35c0-4ea1-9974-7ff23fb11ef2

📥 Commits

Reviewing files that changed from the base of the PR and between 35b77b8 and 623cf86.

📒 Files selected for processing (1)

• src/index.ts

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📝 Walkthrough

Walkthrough

The doSwitch function in src/index.ts was modified to reload credentials via ctx.modelRegistry.authStorage.reload() and ctx.modelRegistry.refresh() instead of calling ctx.reload(), ensuring the swapped Codex credential is picked up in-memory.

Changes

Credential Reload Fix

Layer / File(s)	Summary
Targeted registry reload in switch flow src/index.ts	doSwitch now reloads auth storage and refreshes the model registry directly instead of relying on ctx.reload(), while retaining the notification to the user.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Poem

A rabbit hopped through switched-out keys,
No full reload, just what it sees—
Auth storage refreshed, registry too,
Credentials swapped, clean and true.
Hop, hop, done. 🐇

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely matches the main change: reloading auth storage after a Codex account switch.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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