{"record":{"id":"fa40223cbb842fef","repo":"BigPizzaV3/CodexPlusPlus","slug":"cdp-command-method-id-message-id-failed-error","errorCode":null,"errorMessage":"CDP command {method} id {message_id} failed: {error}","messagePattern":"CDP command (.+?) id (.+?) failed: (.+?)","errorType":"exception","errorClass":"anyhow::Error","httpStatus":null,"severity":"error","filePath":"crates/codex-plus-core/src/bridge.rs","lineNumber":953,"sourceCode":"            }\n            Err(error) => {\n                let _ = crate::diagnostic_log::append_diagnostic_log(\n                    \"bridge.reject_failed\",\n                    json!({\n                        \"request_id\": request_id,\n                        \"message_id\": message_id,\n                        \"error\": error.to_string()\n                    }),\n                );\n            }\n        }\n        sent.map(|_| ())\n    }\n}\n\nfn command_result(response: Value, method: &str, message_id: u64) -> anyhow::Result<Value> {\n    if let Some(error) = response.get(\"error\") {\n        bail!(\"CDP command {method} id {message_id} failed: {error}\");\n    }\n    Ok(response)\n}\n\nfn ensure_runtime_evaluate_succeeded(response: Value) -> anyhow::Result<Value> {\n    if let Some(exception) = response\n        .get(\"result\")\n        .and_then(|result| result.get(\"exceptionDetails\"))\n    {\n        bail!(\"Runtime.evaluate raised an exception: {exception}\");\n    }\n    Ok(response)\n}\n\nfn runtime_evaluate_result_is_false(response: &Value) -> bool {\n    response\n        .get(\"result\")\n        .and_then(|result| result.get(\"result\"))","sourceCodeStart":935,"sourceCodeEnd":971,"githubUrl":"https://github.com/BigPizzaV3/CodexPlusPlus/blob/b1ed92e5e4a2d74095d4b8db5af43cef7acba9c6/crates/codex-plus-core/src/bridge.rs#L935-L971","documentation":"command_result inspects a CDP response and, when it contains an \"error\" object, converts it into a Rust error embedding the method name, message id, and the serialized error payload. This is the standard surface for CDP-level protocol errors (unknown method, invalid parameters, internal browser errors) — the command was delivered and answered, but with a failure result.","triggerScenarios":"Any send_command whose response carries an \"error\" field: calling an unsupported CDP method on the browser version, invalid params, or browser-side errors (e.g. 'Runtime.evaluate' on a destroyed execution context, Page domain not enabled).","commonSituations":"Version drift between the bridge and the target Chromium dropping/renaming CDP methods; sending Page commands before Page.enable; referencing a stale execution context after navigation; typos in method or parameter names.","solutions":["Read the embedded error JSON in the message — CDP errors include code and message explaining the cause","Ensure required domains are enabled first (e.g. Page.enable before Page commands)","Align CDP method/params with the target browser's supported protocol version","Re-issue the command after navigation/reload when the error references a destroyed context"],"exampleFix":"// before\nsession.send_command(id, \"Page.captureScreenshot\", params).await?;\n// after\nsession.send_command(id, \"Page.enable\", json!({})).await?;\nsession.send_command(id, \"Page.captureScreenshot\", params).await?;","handlingStrategy":"try-catch","validationCode":"// check domain support before calling (protocol version sniff)\nlet version = send_cdp_command(&ws, \"Browser.getVersion\", json!({})).await?;\neprintln!(\"target: {}\", version[\"result\"][\"product\"]);","typeGuard":"fn is_cdp_error(response: &serde_json::Value) -> bool {\n    response.get(\"error\").is_some()\n}","tryCatchPattern":"match session.send_command(id, method, params).await {\n    Err(e) if e.to_string().contains(\"failed:\") => {\n        // e contains the CDP error object; log method+id and adjust params or enable the domain\n        eprintln!(\"CDP error on {method}: {e}\");\n    }\n    other => other?,\n}","preventionTips":["Enable required domains (Page.enable, Runtime.enable) before their commands","Keep method/params in sync with the target browser's protocol version","Re-issue context-dependent commands after navigation (stale execution contexts are a common cause)"],"tags":["cdp","protocol-error","devtools","remote-debugging"],"backgroundTag":"api-error-response","analyzedSha":"b1ed92e5e4a2d74095d4b8db5af43cef7acba9c6","analyzedAt":"2026-09-19T23:35:21.129Z","contentChangedAt":"2026-09-19T23:35:21.129Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}