fix(security): enable Claude OAuth refresh and tighten sandbox access#16
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fix(security): enable Claude OAuth refresh and tighten sandbox access#16
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- Add write access to ~/Library/Keychains/login.keychain-db for token refresh - Replace broad ~/Library read with allowlist (Caches, Preferences, etc.) - Restrict write to session-specific $TMPDIR instead of all /var/folders - Deny access to sensitive Library paths (Cookies, Mail, Messages, Safari) - Enforce deny rules for critical sensitive paths in base profile
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Summary
~/Libraryread with allowlist of safe subdirectories/var/foldersDetails
Root cause: Claude stores OAuth tokens in macOS Keychain (
~/Library/Keychains/login.keychain-db). The sandbox allowed reading but not writing to the keychain, blocking token refresh after ~24 hours.Changes:
OAuth Fix: Added write access to
~/Library/Keychains/login.keychain-db(token refresh)Read Security: Replaced
~/Library(ALL data) with:~/Library/Caches/✓~/Library/Preferences/✓~/Library/Application Support/✓~/Library/Logs/✓~/Library/Frameworks/✓~/Library/Keychains/✓ (encrypted, requires Security framework ACL)~/Library/Developer/✓Now protected: Cookies, Mail, Messages, Safari, Calendar, Contacts, Accounts
Write Security: Restricted to session-specific temp:
/private/var/folders,/var/folders(ALL apps' temp)$TMPDIR(session-only)Test plan
sx claude -- claude /loginand verify token refresh workssx -- mktempto verify temp file creation still workscargo test)