Chronology for review
Places supplied events in a consistent UTC sequence while retaining annotations and input order for equal timestamps.
Day 049 / DevOps / Incident Review
Incident Timeline Builder
/ Overview
A dependency-free Python CLI that orders sanitized incident events by UTC instant and reports exact elapsed time, event gaps and the supplied timeline span.
Incident notes collected from different timezones may arrive out of order. A review needs a consistent chronology and visible gaps, without treating the first-to-last event span as independently verified downtime or recovery time.
/ Provided servicesClear thinking.
Clear thinking.
Practical delivery.
Explicit timing
Separates the span of supplied events, elapsed time from the first event and the gap from the previous event.
Bounded local reporting
Rejects malformed records and duplicate keys or IDs, omits unrecognized fields, and uses generic CLI errors without input excerpts.
/ Solution
Incident Timeline Builder validates a bounded local JSON event record, normalizes explicit timezone offsets to UTC, sorts events stably and calculates exact decimal-second elapsed times and gaps. It preserves input order for tied instants and prints only recognized fields. IDs and labels are intentionally included, so records must be sanitized before use. It does not connect to infrastructure, infer missing events, establish causality, enforce incident-state transitions or alter source files.
/ Impact
Timezone-aware UTC chronology
Stable ordering for tied instants
Exact microsecond duration strings
Elapsed time and per-event gaps
Unique event IDs and strict timestamp shape
1,000-event and 1 MB input limits
Text and JSON reports
Eleven standard-library tests
Python standard library
Datetime, argparse, JSON and integer microsecond arithmetic provide a dependency-free read-only CLI.
Defensive validation
Requires explicit timezone offsets, bounded labels and valid event kinds. Labels are not automatically redacted; authorized sanitized inputs are required.
Unittest
Eleven tests cover timezone sorting, stable ties, exact fractions, invalid records, data minimization and real CLI output and errors.