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ci: merge_group slice_count follows vars.CI_MERGE_GROUP_SLICES (4..16, unset=8) (t_f447539b) #1117

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Merged
ang-fleet-lander merged 1 commit into from
Sep 26, 2026
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ci: merge_group slice_count follows vars.CI_MERGE_GROUP_SLICES (4..16, unset=8) (t_f447539b) #1117

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9 changes: 8 additions & 1 deletion .github/workflows/ci.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -156,7 +156,14 @@ jobs:
# and all CI jobs share the 60-concurrent hosted cap: 13 in-flight
# runs at ~20 jobs held the queue at 0 merges in 40 min. Halving the
# gate's matrix halves its share of that cap.
slice_count: ${{ github.event_name == 'merge_group' && 8 || 16 }}
#
# 2026-09-25 (t_f447539b, dynamic CI slots): merge_group follows the LIVE
# self-hosted slot total, which ci-placement writes to
# vars.CI_MERGE_GROUP_SLICES through scripts/ci_routing_ledger.py (the only
# sanctioned writer). A 16-slice matrix onto 5 live slots just queues.
# Clamped 4..16 here AND in ci-overflow-controller `slice_counts`; unset
# = 8, today's value, so this is a no-op until placement is armed.
slice_count: ${{ github.event_name == 'merge_group' && (vars.CI_MERGE_GROUP_SLICES == '' && 8 || (fromJSON(vars.CI_MERGE_GROUP_SLICES) < 4 && 4 || (fromJSON(vars.CI_MERGE_GROUP_SLICES) > 16 && 16 || fromJSON(vars.CI_MERGE_GROUP_SLICES)))) || 16 }}
test_scope: ${{ needs.detect.outputs.test_scope }}

# macOS + Windows lanes. The main `tests` lane above is Linux-only, and
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