Distillation

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<observations> Date: Jul 30, 2026 * 🟡 (21:19) Node.js v22.23.2 zlib docs confirm: `zlib.createZstdDecompress([options])` and `zlib.zstdDecompressSync(buffer[, options])` exist. `createZstdDecompress` is marked "Stability: 1 - Experimental" and **Added in: v22.15.0**. Takes optional `<zstd options>` (`ZstdOptions` class) parameter. Companion methods include `createZstdCompress([options])`. * 🟡 (21:19) Agent reasoning: zstd support requires Node v22.15.0 minimum (not v22.5.0 as user previously stated — the user's engines.node ">=22.5" was imprecise; the real floor is the patch version where zstd landed). User is conflating major.minor vs major.minor.patch versioning. v22.15.0 released mid-2025, after v22.5.0. * 🟡 (21:19) Agent identified zstd functions in docs table of contents: `createZstdDecompress`, `createZstdCompress`, `zstdDecompressSync`, plus Convenience methods: `brotliCompress`, `brotliCompressSync`, `brotliDecompress`, `brotliDecompressSync`, `deflate` (and presumably the rest of the inflate/gzip family). Cross-references multiple doc sections to verify API presence. * 🟡 (21:19) Sample zstd decompression code from docs uses `pipeline(response, zlib.createZstdDecompress(), output, onError)` inside an HTTP `Accept-Encoding: 'br,gzip,deflate,zstd'` switch on `response.headers['content-encoding']`. Available in both ESM (`import zlib from 'node:zlib'`) and CJS (`const zlib = require('node:zlib')`) forms. * 🟡 (21:19) Agent planning to search for the original Node.js PR/commit that introduced zstd to determine the exact version it first landed in (beyond docs claim of v22