[Release] v8.8.0

[github-actions]

What's Changed

• fetch: use ReadableStreamTee for cloning streams by @KhafraDev in fetch: use ReadableStreamTee for cloning streams #5517
• fix(benchmarks): adjust got after v15 upgrade by @slagiewka in fix(benchmarks): adjust got after v15 upgrade #5526
• feat(mock): support asynchronous reply options callbacks by @Develop-KIM in feat(mock): support asynchronous reply options callbacks #5534
• docs: clarify proxy threat model by @mcollina in docs: clarify proxy threat model #5530
• docs: clarify MockAgent pool usage by @vibhor-aggr in docs: clarify MockAgent pool usage #5542
• docs: clarify parser timeout precision by @vibhor-aggr in docs: clarify parser timeout precision #5543
• fix: handle flat alternating header arrays in cache normalizeHeaders by @mcollina in fix: handle flat alternating header arrays in cache normalizeHeaders #5536
• chore(benchmarks): require(esm) on ESM-only packages by @slagiewka in chore(benchmarks): require(esm) on ESM-only packages #5527
• fix: run idle socket validation off setImmediate instead of setTimeout by @carlotestor in fix: run idle socket validation off setImmediate instead of setTimeout #5499
• docs: add custom interceptor example by @vibhor-aggr in docs: add custom interceptor example #5548
• fix(h1): ignore type of service errors by @mcollina in fix(h1): ignore type of service errors #5547
• fix(fetch): convert null init in Response.json by @Ram-blip in fix(fetch): convert null init in Response.json #5540
• fix(redirect): remove body headers after POST-to-GET by @Ram-blip in fix(redirect): remove body headers after POST-to-GET #5551
• build(deps-dev): bump fast-check from 4.8.0 to 4.9.0 by @dependabot[bot] in build(deps-dev): bump fast-check from 4.8.0 to 4.9.0 #5556
• fix(h2): allow stream-bodied requests to multiplex on a busy session by @GiHoon1123 in fix(h2): allow stream-bodied requests to multiplex on a busy session #5538
• fix(h2): destroy aborted stream synchronously instead of via setImmediate by @staylor in fix(h2): destroy aborted stream synchronously instead of via setImmediate #5559
• fix(decompress): skip HEAD responses by @Ram-blip in fix(decompress): skip HEAD responses #5564
• ci: build undici with node.js v26 by @shivarm in ci: build undici with node.js v26 #5237
• docs: clarify top-level request option url fields by @vibhor-aggr in docs: clarify top-level request option url fields #5545
• test: add unexpected disconnect guards to http2 tests by @Develop-KIM in test: add unexpected disconnect guards to http2 tests #5533
• fix: track origins by client map key in Agent teardown by @emmayusufu in fix: track origins by client map key in Agent teardown #5537
• fix: enforce must-revalidate and proxy-revalidate over max-stale and stale-if-error by @jeswr in fix: enforce must-revalidate and proxy-revalidate over max-stale and stale-if-error #5511
• fix(retry): handle Retry-After zero delay by @Ram-blip in fix(retry): handle Retry-After zero delay #5519
• fix: honor stale-if-error on connection errors during revalidation by @jeswr in fix: honor stale-if-error on connection errors during revalidation #5513
• fix: store revalidation-only responses so etag revalidation can engage by @jeswr in fix: store revalidation-only responses so etag revalidation can engage #5515
• fix(h2): prevent uncaughtException from onHttp2SocketError accessing undefined kClient by @mcollina in fix(h2): prevent uncaughtException from onHttp2SocketError accessing undefined kClient #5546
• fix(h2): complete request stream on 'end' instead of waiting for 'close' by @staylor in fix(h2): complete request stream on 'end' instead of waiting for 'close' #5560
• fix: invalidate Location and Content-Location URIs on unsafe methods by @jeswr in fix: invalidate Location and Content-Location URIs on unsafe methods #5514
• test: deflake invalid websocket close status test by @mcollina in test: deflake invalid websocket close status test #5550
• refactor: replace tspl with node:test t.plan in connect-timeout tests by @mcollina in refactor: replace tspl with node:test t.plan in connect-timeout tests #5518
• fix(h2): release completed requests from queue by @staylor in fix(h2): release completed requests from queue #5569

New Contributors

• @Develop-KIM made their first contribution in feat(mock): support asynchronous reply options callbacks #5534
• @carlotestor made their first contribution in fix: run idle socket validation off setImmediate instead of setTimeout #5499
• @GiHoon1123 made their first contribution in fix(h2): allow stream-bodied requests to multiplex on a busy session #5538
• @emmayusufu made their first contribution in fix: track origins by client map key in Agent teardown #5537

Full Changelog: v8.7.0...v8.8.0

[mcollina]

lgtm

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.46%. Comparing base (f87273e) to head (20f0e21).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5575      +/-   ##
==========================================
- Coverage   93.47%   93.46%   -0.02%     
==========================================
  Files         110      110              
  Lines       37561    37561              
==========================================
- Hits        35111    35107       -4     
- Misses       2450     2454       +4     

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.