Parse reliability page-life timestamps as UTC
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Assessment
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Newbie friendliness
- 82/100
- Issue type
- Bug
- Clarity
- Clearly specified
- Activity status
- Active
- Tech stack
- typescript
- Domain
- backend
Research direction
Read scripts/engine-reliability-cohorts.mjs and inspect when() and the page-life timestamp handling. Add a test that runs under a DST-observing zone, using offset-free and offset-bearing first_seen values to verify parsing and ordering. The work is done when offset-free timestamps are treated as UTC and the test confirms an explicit offset remains effective.
Written by the indexing model from the issue text.
Description
Backlog row reliability-when-utc (deferred from the independent review of PR #1232).
when() in scripts/engine-reliability-cohorts.mjs parses an offset-free first_seen as local time. Under TZ=America/New_York, a DST gap can reorder two page lives and flip a session's original arm. If PostHog returns first_seen with an offset this has no effect; otherwise append Z before parsing and pin it with a test that runs under a DST-observing zone.
- Dominant language
- TypeScript
- Stars
- 6
- Forks
- 1
- Avg merge
- 9h 22m
- Merged PRs (30d)
- 179
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