**`check-fnxc-future-dates` exits 1 on `origin/main`.**
```
packages/engine/src/scheduler.ts: 3 future-dated stamps, baseline allows 2
FNXC:ConcurrencyAdmission 2026-08-06-09:00 (six days out)
FNXC:WorkflowLifecycleColumns 2026-08-01-05:00
FNXC:WorkflowScheduling 2026-08-01-01:05
```
All three repointed to `2026-07-31`, times preserved. Gate now exits 0.
## This red has outlived three owners
#3270, #3272 and #3274 were each opened against it and each **closed
without merging**. Main has been red on this gate for hours while three
fixes came and went.
Claimed with `check-file-claimed.mjs` before starting — only #3262
touches `scheduler.ts`, and it is a terminal-role refactor rather than a
stamp fix, so this was genuinely unowned.
## Why this keeps recurring
Seven incidents in roughly two hours. The mechanism, in one line: **the
date check runs only in CI** (`pr-checks.yml:66`, no pre-commit or
pre-push hook), so every PR is validated against main's baseline *at its
own CI time* and cannot see a concurrent or later change. Two PRs
stamping the same file both pass, then compose into a red main. One case
(#3273) was a stale branch **reverting** an already-merged fix.
Patching instances has not converged — this PR is the eighth attempt at
the same class. Two structural options, neither of which I am landing
unilaterally since the second changes the gate's contract:
- run the date check at **author time** (pre-push); it needs no baseline
for "is this date in the future", so it cannot be raced
- make the date rule **baseline-free** — a future-dated stamp is always
wrong, unlike a lifecycle literal that may be a deliberate fallback
`2026-08-06` being six days out also suggests these are not off-by-one
timezone slips but stamps written from an intended future date.
## Verification
- `check-fnxc-future-dates` — **exit 0** (was exit 1 on main)
- `scheduler` suites — **148 pass**
- `tsc --noEmit` (engine) — 0 errors
- comment-only diff, no behaviour change
Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
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