Record receiver changes as a pre-registration deviation - #240
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Three arm-tagged submissions exist, so this is a dated deviation record, not an amendment. It lists #193, #201, #216 and #239, notes that the add-only rule creates import edges by construction and so interacts with the primary metric, and commits the analysis to splitting the metric at 22 September 2026. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Adds a dated Deviation, 22 September 2026 section to
PREREGISTRATION.md. Three arm-tagged submissions exist (A: 2, B: 1, all from before 20 August), so this can't be an amendment. It records the receiver changes made since then: #193, #201, #216 and #239.The part that matters: the add-only rule (#216) interacts with the primary metric. Extending an accepted module used to be possible by editing it, which creates no import edge. It now requires a new importing module, which creates an edge by construction. That plausibly favours arm B, whose paragraph asks for exactly that.
⚠ This text commits the analysis to two things. Please review before merging:
It also states that the pre-change period is the cleaner test if the two periods disagree.
The hypothesis, metric, stopping point and decision rule are unchanged.
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