fix(router): fix singleflight deduplication bugs and propagate response headers#2522

Merged

jensneuse merged 9 commits intomainfrom

jensneuse/singleflight-fix

Feb 18, 2026

Commits on Feb 18, 2026

feat(router): fix singleflight deduplication bugs and propagate response headers

jensneuse
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claude
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chore: harden test assertions and add documentation comments

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claude
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chore: fix data race in Set rule, extract test helper

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claude
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fix(router): avoid double-applying response header rules for singleflight leaders

jensneuse
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claude
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fix(router): apply response header rules only in OnFinished, not OnOriginResponse

jensneuse
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claude
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chore(deps): upgrade graphql-go-tools to v2.0.0-rc.251

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claude
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fix(router): apply response header rules before tracing/metrics early returns

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test(router): add singleflight tests for propagate rules and multi-subgraph cache control

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claude
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chore: address PR review nits

jensneuse
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claude
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