[vlad-salone]

Closes #57. One entry per key of Options, in the shape of CodecOption, from a new options() export.

options();
// [{ key: "format", default: "auto", help: "output format: jpeg, png, webp, avif or jxl. ..." },
//  { key: "target", default: "70", help: "SSIMULACRA2 score to reach by searching encoder quality, up to 100. ..." },
//  { key: "effort", default: "6", help: "0 to 10. Higher is slower and smaller" },
//  { key: "width", help: "target width in pixels. ..." },   // no default: left out, nothing is resized
//  ...]

The defaults are not written down a second time. The listing reads them from the builder an encode without options starts from, params() and resize_bounds() of the package's Sqzer, and spells them the way the options take them, so effort says 6 because EncodeParams::default does. Where the default depends on the image or the format, format and background, the entry says auto, as avif:alpha_quality does. Where leaving the key out means not doing the thing, width, scale, preset, quality, codecOpts, onTrial, the entry has no default rather than an invented one, and sqzer.d.ts has it as optional.

The key list that options() walks is the same one a misspelt key is refused against, so the two cannot drift; the test checks that the refusal for an unknown key names every listed key, that the listed defaults are the ones above, and that an encode with no options lands on them.

Not done here: sqzer-dev/sqzer.dev#19 drops the page's defaults.ts once this is released.

Checked locally: cargo clippy --workspace --all-targets --all-features, cargo doc with warnings denied, and wasm-pack test --node, 17 tests. pack.sh and the tarball run are left to the wasm job of CI.

🤖 Generated with Claude Code

[greptile-apps]

Confidence Score: 5/5

[Medium impact] The PR appears safe to merge; no actionable issues were found.

Summary

Adds options() with the accepted encode keys, their help, and their defaults.

• JavaScript callers can list encode options with help and defaults.

vlad-salone explicitly chose auto to describe defaults that depend on the image or format. These values are display metadata, not a ready-to-send options object. vlad-salone also explicitly deferred removing the page’s defaults.ts to sqzer-dev/sqzer.dev#19.

_{Reviews (1) · Last reviewed commit: "feat(wasm): options(), the keys of optim..." · Reviewed by Greptile}