Promote v2.0.0-pre.86 to latest

Promote v2.0.0-pre.85 to latest

Promote v2.0.0-pre.84 to latest

Merge pull request #9 from codebase/codex/acp-harness

Add ACP harness support for Buzz

Merge pull request #13 from codebase/codex/acp-session-refresh

Fix OAuth refresh for long-lived ACP sessions