PAY-841Drafting memorollout
Should settlement webhooks dual-write for 30 days?
Settlement-v2 is 25% rolled out. We can either dual-write to v1+v2 for 30 days as a safety net or cut over fully on promotion.
Decider
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drafting
15%
Drafted memo
Dual-writing 30 days lets us roll back without data loss if v2 surfaces a regression after 100%.
Cost is negligible: ~5% extra DB writes for 30 days, no read path impact.
Recommendation: dual-write 30 days, drop on day 31.
Options
Dual-write 30 days · recommended
Cheap safety net; reversible cutover
cost: ~5% DB write overhead for 30 days
Cut over immediately
Simpler operationally
cost: Rollback requires manual data reconciliation
When you ship Cloud, deciders pick from Slack or here. The decision is committed back as a memo under .crastinating/decisions/.