- Add AuthClientID and AuthClientFromMCP fields to edition Hooks, allowing overlays to override the default OAuth client ID and route auth through MCP endpoints.
- Introduce token marker file (token.json) mechanism so the host application in embedded mode can detect authentication state without accessing the keychain.
- Update SaveTokenData/DeleteTokenData to write/remove the marker file when running in embedded mode.
- Update ClientID() and IsClientIDFromMCP() to respect edition overrides.
Extract resolveAccessTokenFromDir from getCachedRuntimeToken so both
MCP and non-MCP clients (e.g. A2A gateway) share the same OAuth +
legacy fallback logic including host compatibility hooks.
- Add ResolveAuxiliaryAccessToken in internal/app for overlay use;
reuses process-level token cache when configDir matches the edition
default, avoiding repeated Keychain access.
- Simplify pkg/runtimetoken to a thin delegate to the shared impl.
- Refactor getCachedRuntimeToken to call resolveAccessTokenFromDir,
removing duplicated provider/manager setup code.
Made-with: Cursor