generate-e2e-matrix.mjs grows --format results: reads the run's own
job list as NDJSON {name, conclusion} on stdin (per-leg conclusions
are NOT reachable through needs - a matrix job collapses to one
aggregate result) and re-renders the plan chart with each cell's
outcome. Legs are recognized by the exact name shape buildMatrices
mints, so unrelated jobs fall out; duplicate leg names (one windows
job per driver arm, only one runs) merge by significance - real
outcomes beat skips, failures beat successes. A final report job
(if: always, needs all three OS jobs) appends the chart to its step
summary via gh api with the default token.
Verified against two real runs: 31536931863 renders 11 passed / 0
failed / 54 skipped all-green; 31557865241 (the pre-EAP-fix run)
renders its 4 real failures + cancellations over the sibling arm's
skips.
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