[dev-up] netstat existence fallback matches the LISTEN state by English string (localized Windows yields a false free) — from PR #2522 round 2

[Chris0Jeky]

From the round-2 review of PR #2522 (#1898 port-release deadline), MEDIUM, non-blocking, confined to the netstat fallback path (taken only when ss / Get-NetTCPConnection are unavailable). scripts/dev-up.sh ~411 and scripts/dev-up.ps1 ~410-424 match the LISTEN/LISTENING state by English token; a localized Windows netstat (e.g. German ABHÖREN) filters every row out, the inventory reports free while Determined is true, and a held port is treated as released (PID file removed, exit 0). Fix: match the state token positionally (column index) or accept any non-empty state on a matching local-port row for existence, keeping the port-token anchoring. LOWs from the same review: now_ms in dev-up.sh should sanity-check the digit count of date +%s%3N output (a bare-seconds return would stretch a 30 s budget to hours); the two launchers' timeout-parse edge cases (whitespace, -0) differ slightly and the comment overstates parity. Refs #1898, #2378.

[Chris0Jeky]

Implemented in stacked PR #2531: #2531

• scripts/dev-up.ps1 and scripts/dev-up.sh now use the positional state field as localized, non-empty evidence while preserving local-port anchoring.
• Bash now rejects undersized epoch timestamps and aligns timeout parsing for surrounding whitespace and signed zero.
• Direct Bash and PowerShell regression seams pass (4/4); the relevant existing port-release cases also pass.
• Full local launcher suite reached 86 passing tests; two unchanged Bash lifecycle tests timed out locally with no tracked launcher descendants. Hosted CI on the exact PR head is the merge gate.

The PR is intentionally based on the still-open #2522 branch and should be retargeted after that parent lands.

[Chris0Jeky]

Coordinator disposition (2026-09-06, SC-10 delegated). PR #2531 merged as c4cca76b0 (retargeted from the #2522 stack to main, which is why Closes fired and this issue closed). The 2026-09-04 review's FIX-FIRST ("the fallback stopped discriminating on socket state") was confirmed on re-review and fixed by the coordinator: both launchers identify a listener by its wildcard foreign address, never by the localized state token; drained TIME_WAIT/CLOSE_WAIT rows no longer count; BSD dual-stack tcp46 rows are accepted. Follow-ups recorded on the PR: the PowerShell fixture's TIME_WAIT row shares the listening port so that twin carries no mutation resistance of its own; the ASCII ABHOEREN fixture never exercises the OEM code page; the Bash timeout-parity test names a PowerShell parity it does not execute; netstat -ano -p TCP is IPv4-only on Windows.