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eb99f82ce4
Follow-up to the salvaged early-exit retry fix (#35617): the debug-browser launch path was fire-and-forget (stderr to DEVNULL, no logging), so every platform failure — Windows singleton forward to an existing instance, bad profile dir, missing shared libraries, policy blocks — collapsed into the same unactionable 'port 9222 isn't responding yet' message and debug reports contained nothing. - launch_chrome_debug() returns a structured ChromeDebugLaunch with per-candidate attempts (state, exit code, stderr tail) - browser stderr is captured to <hermes_home>/chrome-debug/launch-stderr.log - clean exit (code 0) without the port opening is detected as Chromium's single-instance forward and produces a targeted user hint to close all running instances of that browser - crash exits surface the stderr tail (e.g. missing libnspr4.so) - every spawn/exit is logged to agent.log so hermes debug share captures it - CLI (/browser connect) and TUI/desktop (browser.manage) both print the hint