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@@ -130,7 +130,7 @@ No direct invalidation; the named consumers own any request-prefix changes.
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These limits define when the provider is a poor fit or needs special operational care. They are current package constraints, not a general platform comparison or a task backlog.
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- **Native ownership has explicit host requirements** — Linux needs a readable user manager and `systemd-run --expand-environment=no`; older systemd versions use the warned PGID fallback. macOS always uses that fallback because no supported public persistent owner exists.
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-- **Native selection has bounded per-spawn costs** — Linux rechecks the bootstrap entry, libc `execve`/`fcntl` bindings, live user manager, and literal-argv scope support before every eligible ordinary or terminal spawn; Windows rechecks the runner entry, bindings, and current Job support before every ordinary spawn. Only the fallback warning is retained across spawns. All probes finish before the user command can run, and child-process probes have a 5-second timeout. Each Linux launch creates a private request directory, checks unresolved scope establishment every 50 milliseconds, then exponentially backs off an established active scope to at most 5 seconds between queries; a Windows ordinary launch keeps one runner and IPC channel until the Job reports zero active processes. Target standard handles are inherited directly, with no named-pipe stdio or result files.
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+- **Native selection has bounded per-spawn costs** — Linux repeats the bootstrap entry, libc `execve`/`fcntl` bindings, live user manager, and literal-argv scope probe until it first succeeds; later eligible ordinary or terminal spawns recheck only the live user manager. Windows rechecks the runner entry, bindings, and current Job support before every ordinary spawn. Successful Linux deep-probe state and fallback-warning de-duplication persist for the provider lifetime. All probes finish before the user command can run, and child-process probes have a 5-second timeout. Each Linux launch creates a private request directory, checks unresolved scope establishment every 50 milliseconds, then exponentially backs off an established active scope to at most 5 seconds between queries; a Windows ordinary launch keeps one runner and IPC channel until the Job reports zero active processes. Target standard handles are inherited directly, with no named-pipe stdio or result files.
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- **Windows Job inheritance has defined exclusions** — ordinary descendants inherit the Job by default, but breakaway processes are outside the guarantee. The target starts only after Job assignment; external termination of the runner in the narrow create-to-assignment interval can leave a suspended target behind.
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- **Windows terminal signalling is console-wide** — SIGINT is delivered as a `\x03` Ctrl-C input write that conhost turns into a console-wide CTRL_C event; SIGTSTP and SIGHUP are rejected as unavailable; a `taskkill` without `/F` does not terminate console processes, so the teardown TERM tier is a grace wait before the `/F` escalation. Windows readiness has no exact stdin-wait tier: the prompt-marker fast path compares the shell pid as the pseudo foreground group, and silence/timing tiers cover the rest.
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- **Fallback terminal ownership remains observational** — on macOS or Linux without usable user-systemd, a child that reparents before any foreground-inspection snapshot or leaves the owned terminal session can escape the process-table scan. The local provider does not add a continuous process-table monitor; supported Linux native mode instead retains these descendants through scope membership.
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pku-xht