Distillation

Date: Jul 30, 2026

• 🟡 (21:20) Agent retrieved nodejs/node CHANGELOG_V22.md via web fetch to verify when zstd was added to Node.js.
• 🟡 (21:20) v22.15.0 docs confirmed: zlib.createZstdDecompress([options]) — Stability: 1 - Experimental, Added in: v22.15.0. So Node 22.15.0 is the minimum version supporting zstd in node:zlib.
• 🟡 (21:20) The user's claim that Node 22.5 introduced zstd support is INCORRECT — actual introduction is v22.15.0. The package.json's >=22.5 engines field is too permissive and should be >=22.15.0.
• 🟡 (21:20) CHANGELOG_V22.md shows zstd-related commits across versions:
  • v22.18.0: zlib dictionary support added to zstdCompress/zstdDecompress (PR #59240, SEMVER-MINOR)
  • v22.18.0: missing Zstd strategy constants added (PR #59312)
  • v22.18.0: doc fix — add missing zstd to mjs example of zlib (PR #60915)
  • v22.18.0: doc fix — replace column with columnNumber in example of util.getCallSites (PR #60881, commit 99e384e6d4)
  • v22.18.0: typings: add ZSTD_COMPRESS, ZSTD_DECOMPRESS to internalBinding (PR #58655)
  • v22.17.0 (approx, with f9f611fb58): SEMVER-MINOR deps,tools: add zstd 1.5.6 (PR #52100 by Jan Martin) — this is the earliest zstd addition in the changelog
  • v22.17.x (approx): deps: update zstd to 1.5.7 (PR #57940)
  • v22.17.x (approx): build: fix zstd libname (PR #57999)
  • v22.17.x (approx): tools: add zstd updater to workflow (PR #57831)
• 🔴 (21:20) User asserted that Node 22.5 was the version that introduced zstd support (user said "I think we need Node 22.5 because that's the one introduced zstd support but check this first"). This assertion is WRONG — actual is v22.15.0 for createZstdDecompress, with zstd dependency added earlier via PR #52100.
• 🔴 (21:20) User requested to "replace column with columnNumber in example of util.getCallSites" — referring to Node.js core doc fix (PR #60881, commit 99e384e6d4 by Deokjin Kim). Note: this is referencing the upstream Node.js commit, not a local change.