{"record":{"id":"01e8d962cd336e32","repo":"zeroclaw-labs/zeroclaw","slug":"browser-backend-auto-found-no-usable-backend-ag-01e8d9","errorCode":null,"errorMessage":"browser.backend='auto' found no usable backend (agent-browser missing, rust-native unavailable, computer-use sidecar unreachable)","messagePattern":"browser\\.backend='auto' found no usable backend \\(agent-browser missing, rust-native unavailable, computer-use sidecar unreachable\\)","errorType":"exception","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"crates/zeroclaw-tools/src/browser.rs","lineNumber":419,"sourceCode":"                    return Ok(ResolvedBackend::RustNative);\n                }\n                if Self::is_agent_browser_available().await {\n                    return Ok(ResolvedBackend::AgentBrowser);\n                }\n\n                let computer_use_err = match self.computer_use_available() {\n                    Ok(true) => return Ok(ResolvedBackend::ComputerUse),\n                    Ok(false) => None,\n                    Err(err) => Some(err.to_string()),\n                };\n\n                if Self::rust_native_compiled() {\n                    if let Some(err) = computer_use_err {\n                        anyhow::bail!(\n                            \"browser.backend='auto' found no usable backend (agent-browser missing, rust-native unavailable, computer-use invalid: {err})\"\n                        );\n                    }\n                    anyhow::bail!(\n                        \"browser.backend='auto' found no usable backend (agent-browser missing, rust-native unavailable, computer-use sidecar unreachable)\"\n                    )\n                }\n\n                if let Some(err) = computer_use_err {\n                    anyhow::bail!(\n                        \"browser.backend='auto' needs agent-browser CLI, browser-native, or valid computer-use sidecar (error: {err})\"\n                    );\n                }\n\n                anyhow::bail!(\n                    \"browser.backend='auto' needs agent-browser CLI, browser-native, or computer-use sidecar\"\n                )\n            }\n        }\n    }\n\n    /// Validate URL against allowlist","sourceCodeStart":401,"sourceCodeEnd":437,"githubUrl":"https://github.com/zeroclaw-labs/zeroclaw/blob/88bb9c8533fc57ed7a03e36ca7c9ed2bf8336dcc/crates/zeroclaw-tools/src/browser.rs#L401-L437","documentation":"Error \"browser.backend='auto' found no usable backend (agent-browser missing, rust-native unavailable, computer-use sidecar unreachable)\" thrown in zeroclaw-labs/zeroclaw.","triggerScenarios":"Thrown at crates/zeroclaw-tools/src/browser.rs:419 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Install agent-browser, enable browser-native, or start the computer-use sidecar; then retry."],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"88bb9c8533fc57ed7a03e36ca7c9ed2bf8336dcc","analyzedAt":"2026-08-23T01:07:41.857Z","schemaVersion":2},"datasetVersion":"2026-08-23T08:06:27.607Z"}