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Neil
1b5cc00870
Every writer sharing a userData dir -- main's local PTY path, the daemon fork, and the daemons of other builds that outlive the app that spawned them -- wrote one fixed `shell-ready/` tree. Last writer won, and the guard only re-checked that the files were present, never that they were this build's. A daemon whose spawn env no longer agreed with the wrapper on disk kept launching shells it could not read: the ready marker never fired and every startup command waited out the full 15s timeout, silently, with restarting the app powerless to fix it because the daemon outlives the app. Measured 15.17s vs 1.10s once the tree matched. The five live daemons on the machine this was found on spanned app versions 1.4.181-1.4.185, all from the same installed app across auto-updates, so this reaches ordinary installs. Name each tree after a hash of its contents, at `<userData>/shell-wrappers/<hash>/shell-ready/`. Different bytes are a different directory, so "present" means "written by this build" again. The hash sits above the `shell-ready` leaf because ZDOTDIR self-reference guards match that exact suffix. Nothing collects old trees: ~48KB each, a couple of MB a year against a userData dir in the tens of GB, not worth an `rm -rf` on the spawn path. Also publishes the resolved root to WSL over WSLENV `/p`, since the in-guest script cannot derive a hash, and reports readiness failures to the daemon's NDJSON log rather than a console the detached daemon discards. Generated wrapper content is byte-identical; snapshots unchanged.