Messages reach exactly who they name

Steps

1. 1 None Offstage: the manager addresses a thread to Door staff for this event 0:03
2. 2 door Door staff open their inbox on a phone 0:22 ▣

   This staffer was never added to the thread by hand. They hold the role, and the role is who it was addressed to.

3. 3 door Open it 0:24 ▣

   The body, and above it the thing plan 105 added: who this went to.

4. 4 Member A member opens their inbox 0:33 ▣

   Same page, same moment. A member holds no door role, so the briefing is not theirs to read.

5. 5 Member And the URL itself gives nothing away 0:35 ▣

   404, not 403. The existence of a thread is itself private, so the page must not confirm that this one is real.

6. 6 manager The manager's console, on a desktop 0:45 ▣

   Staff-wide read is a product decision, so the page is supposed to say that rather than look like a personal inbox holding other people's mail.

Notes

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Run history (5)

• 20260830T214217Z-3499cea — passed · 3499cea
• 20260830T183119Z-77584d6 — passed · 77584d6
• 20260830T180330Z-bd2e5e8 — passed · bd2e5e8
• 20260830T175301Z-7720b19 — passed · 7720b19
• 20260830T170338Z-b690bff — passed · b690bff