Clarify that only long-lived OAuth tokens (claude setup-token) or API keys
should be used — short-lived tokens from the keychain expire within hours
and cause recurring 401s. Also update native credential proxy skill to
swap the OneCLI reference when applied.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Add SKILL.md for the native credential proxy feature skill.
Delete src/credential-proxy.ts and src/credential-proxy.test.ts
which became dead code after PR #1237 (OneCLI integration).
These files live on the skill/native-credential-proxy branch.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>