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ci: run web test shards on separate runners - #183
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The four web shards ran back to back on one runner, and the last one kept losing the browser connection on main. Each shard now gets its own runner. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
One worker ran every browser file in a shard through a single page, which lost its connection partway through shard 4 on a cold Vite cache. Drops the temporary diagnostics. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Main has been red since #182 because Test Web kept failing in its fourth shard: partway through, the single browser page running every browser test file lost its connection to the vitest server. It reproduces locally only with a cold Vite cache (3 of 6 runs failed with one worker, 4 of 4 passed with two) and leaves no crash or OOM on the runner. Test Web now runs as a four-job matrix with one shard per runner and two workers per shard, so each page gets about half the files. The Check gate still keys off
test_web. Done by Claude Opus 5.5 in Claude Code.