Distinguish CDP session detachment, observed crashes, and transport loss. Preserve the observed window alongside the original typed coverage-stop failure and unconfirmed cleanup.
Validated with 40 focused boundary tests, check:ci, docs:check, and the real Chrome public CLI/MCP verifier on macOS. Browser timing comparison remains incomplete because unchanged-main fixture readiness was intermittent.
Fixes#5756
Own CDP frame applicability and identity at the parsed event boundary. Preserve malformed or incomplete main-frame facts, recognize replacement roots, and carry the same document identity through captures, screenshots, timelines, and execution windows.
Validation: full check:ci and docs:check; 763 browser and dispatch tests passed, 6 skipped. Independent source and fixture-lifecycle review passed. Local real-Chrome behavior was not exercised.
Closes#5665
Own CDP transports from admission through observed close, retain failed
owners for retry, and keep active peers separate from pending cleanup.
Preserve primary errors and completed facts through final cancellation.
Forward passive Electron CLI cancellation and dispose browser, runtime and
scenario owners from CLI and MCP shutdown.
Refs #4255, #4256, #4257
Pass validated coverage into normalization and index retained sources by script ID instead of scanning them for every script. Preserve source revalidation, UTF-16 bounds, nested counts, and unavailable-source uncertainty.
Validation: 285 tests across 34 focused suites, check:fast, and architecture guards passed. Flameox-guided 8,000-script normalization benchmark improved from 101.6 ms to 5.5 ms median with identical full-result digests; this is normalization CPU, not end-to-end browser timing.
morluto