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browser-use 0.13.8 adds first-party OpenClaw skill support and marks read-only MCP tools with readOnlyHint annotations
browser-use (109,485 stars) shipped 0.13.8 on Aug 16, 2026, its first release in three weeks, with first-party OpenClaw skill support (PR #5476), MCP readOnlyHint annotations on read-only tools (#5246), CallToolResult.isError now surfacing as a failed ActionResult (#5235), and a default switch to the bu-2-0-mini-preview model. It also fixes a DOMTreeSerializer bug that leaked paint-order-occluded text to the LLM (#5225) and a registry bug exposing domain-restricted actions on an empty URL (#5204). The two MCP fixes and the domain-restriction fix are quiet security-relevant corrections, not just polish.
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