v0.39.0 v0.39.1
vercel-labs/agent-browserOct 9, 2026 → Oct 13, 20264 days between releases
What's New
Fixes critical duplicate execution bug and adds outcome_unknown reporting.
Breaking Changes
- CLI JSON and MCP responses now include `outcome_unknown` status.
New Features
- CLI JSON and MCP responses now report `outcome_unknown` for inspection.
Bug Fixes
- Fixed duplicate command execution after a lost daemon response.
Upgrade Notes
No configuration changes required. Consumers parsing CLI JSON or MCP responses must now handle the new `outcome_unknown` status field.
The Two Releases
v0.39.0
Oct 9, 2026· 12 days ago
This release introduces an experimental Obscura engine with local Chrome-like capabilities and enhanced HTTPS support for CLI commands. It resolves critical bugs regarding selector-scoped snapshots, auto-connect timeouts, and daemon responsiveness.
Full release notesv0.39.1
Oct 13, 2026· 8 days ago
This release fixes a critical bug where mutating and launch commands were incorrectly retried after a lost daemon response. It introduces `outcome_unknown` reporting in CLI JSON and MCP responses to allow callers to inspect results before retrying, while read-only commands remain unaffected.
Full release notes