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perf(sentinel): the pipeline builder around stage groups#2030

Openyuki-tanakawants to merge 7 commits intomainfromperf/sentinel-3031
YUYuki Tanakacommented 2w ago

Summary

perf(sentinel): the pipeline builder around stage groups — addresses the regression surfaced in sentinel-graph after the recent perf work landed on main.

Why

  • The previous behavior on main short-circuited the safe path under load; this PR restores the intended contract.
  • Adds a guard so the regression cannot resurface silently in staging.
  • Drive-by: removes dead-code call sites the linter was warning about.

Scope

  • Files touched: 2 across the core module + tests.
  • No public API change; ABI is preserved.
  • CI: all green on the matrix runs.

Labels: bug, security

YUYuki Tanakacommented 1w ago

LGTM modulo the comment I left on the changelog entry.

SASara Lindqvistcommented 1w ago

Smoke-tested under the load profile from last week's incident. No regressions.

SASara Lindqvistcommented 1w ago

Nice — pulled this locally and the burn-rate window now lines up with the SLO board. Approving once the snapshot tests catch up.

SASara Lindqvistcommented 1w ago

Could we add a regression test for the partial-bucket case? I'm happy to push it on top if you'd prefer.

SASara Lindqvistcommented 1w ago

Left a few small nits inline. Otherwise the shape is exactly what we discussed in the design doc.

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