Sort event metadata in notifications - #1369
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August 11, 2026 07:30
Notification fields are built by ranging over event.Metadata. Go randomises map iteration, so the same event produces a different field order on every send and the value being looked for moves between messages. Iterating slices.Sorted(maps.Keys(...)) makes the order stable and alphabetical. slices is already used in this package and the module is on Go 1.26, so no helper is needed. teams.go already does this for its Adaptive Card payload, sorting the built facts with slices.SortFunc. The guarantee existed but was not applied elsewhere, including to the deprecated connector payload in the same file. Applied to the notifiers whose output is read in order: slack, discord, rocket, teams, google_chat, zoom, webex, grafana, lark, matrix, telegram. The iterate-sorted-keys form is used throughout because five of them concatenate strings and cannot be sorted after the fact. Not applied to incidentio and sentry, where metadata goes into a map and order cannot be observed, nor to datadog and otel, where tags and attributes are sets. Signed-off-by: Artur Chopikian <arturchopikian@gmail.com> Assisted-by: claude-code/claude-opus-5
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Notification fields are built by ranging over
event.Metadata. Go randomises map iteration, so the same event produces a different field order on every send:Same four keys, two orders, seconds apart. The value being looked for moves between messages.
teams.goalready sorts its Adaptive Card facts withslices.SortFunc, so the guarantee exists — it was not applied elsewhere, including to the deprecated connector payload in the same file.Applied to the notifiers whose output is read in order: slack, discord, rocket, teams, google_chat, zoom, webex, grafana, lark, matrix, telegram. The iterate-sorted-keys form is used throughout because five of them concatenate strings and cannot be sorted afterwards.
Not applied to incidentio and sentry, where metadata goes into a map, nor to datadog and otel, where tags and attributes are sets.
TestSlack_PostFieldsAreSortedposts one event ten times and asserts the order each time. It fails on main.make tidy fmt vetandmake testpass, working tree clean.