Compact protocol metadata and streamline telemetry

[markmur]

Build on the Vite minification change to reduce the web bundle further through compact protocol metadata and simpler telemetry bookkeeping. JavaScript decreases from 34,073 to 27,953 bytes (18.0%), and deterministic gzip decreases from 10,458 to 9,998 bytes (4.4%).

• Generate shared wire-field names, numeric model references, and compact traversal metadata. Escaped base-91 integers allow the encoding to grow with the schema.
• Cache encode/decode lookups once per model, avoiding repeated name conversion and allocation during payload traversal.
• Simplify telemetry export handling and navigation instrumentation while preserving events, retry behavior, validation errors, and extension payload handling.
• Cover encoding boundaries, nested structures, lookup reuse, and telemetry retries; independently assert all 15 expected protocol methods and the set size.

Stack

• Compact protocol metadata and streamline telemetry #861
• Add web bundle size budgets with explicit acceptance #864
• Enable full minification for the web library bundle #862

[github-actions]

Bundle Size Budgets

Budget	Size	Limits	Result
Web JavaScript (uncompressed)	27.30 KiB (-5.98 KiB)	35 KiB soft / 50 KiB hard	✅ Within budget

• Comment 5952199366: wait for the current size report, then post a new command.

Bundle and package size

Web bundle sizes cover shipped runtime JavaScript. Package sizes cover the full published archive, including any source maps, declarations, and documentation it contains.

Platform	Measurement	Compression	Base	Head	Delta
Web	JavaScript bundle	Uncompressed	33.3 KiB	27.3 KiB	-6.0 KiB
Web	JavaScript bundle	gzip	10.2 KiB	9.8 KiB	-461 B
Web	npm package (.tgz)	gzip	89.5 KiB	89.1 KiB	-459 B
React Native	npm package (.tgz)	gzip	119.6 KiB	120.4 KiB	+788 B
Android	Library package (.aar)	ZIP	407.6 KiB	407.6 KiB	0 B

Web package files (uncompressed)

These are uncompressed file sizes; they do not sum to the compressed package size above.

File	Base	Head	Delta
dist/index.js.map	249.0 KiB	241.5 KiB	-7.5 KiB
dist/index.d.ts	47.9 KiB	47.9 KiB	0 B
dist/custom-elements.json	47.5 KiB	46.9 KiB	-532 B
dist/index.js	33.3 KiB	27.3 KiB	-6.0 KiB
README.md	20.2 KiB	20.2 KiB	0 B
package.json	3.6 KiB	3.6 KiB	0 B
LICENSE	1.1 KiB	1.1 KiB	0 B

React Native package files (uncompressed)

These are uncompressed file sizes; they do not sum to the compressed package size above.

File	Base	Head	Delta
node_modules/@shopify/checkout-kit-protocol/src/generated/Models.ts	108.7 KiB	108.7 KiB	0 B
node_modules/@shopify/checkout-kit-protocol/src/generated/Models.d.ts	73.1 KiB	73.1 KiB	0 B
android/src/main/java/com/shopify/reactnative/checkoutkit/ShopifyCheckoutKitModule.java	16.2 KiB	16.2 KiB	0 B
ios/ShopifyCheckoutKit.swift	16.1 KiB	16.1 KiB	0 B
ios/AcceleratedCheckoutButtons.swift	14.1 KiB	14.1 KiB	0 B
src/components/AcceleratedCheckoutButtons.tsx	13.0 KiB	13.0 KiB	0 B
src/index.ts	12.7 KiB	12.7 KiB	0 B
lib/commonjs/index.js	12.4 KiB	12.4 KiB	0 B
lib/commonjs/components/AcceleratedCheckoutButtons.js	11.4 KiB	11.4 KiB	0 B
src/index.d.ts	11.3 KiB	11.3 KiB	0 B
lib/commonjs/components/AcceleratedCheckoutButtons.js.map	10.4 KiB	10.4 KiB	0 B
lib/module/index.js	10.4 KiB	10.4 KiB	0 B
lib/module/components/AcceleratedCheckoutButtons.js	10.2 KiB	10.2 KiB	0 B
node_modules/@shopify/checkout-kit-protocol/src/generated/ProtocolNotifications.ts	9.5 KiB	9.2 KiB	-267 B
lib/module/components/AcceleratedCheckoutButtons.js.map	9.1 KiB	9.1 KiB	0 B
lib/module/index.js.map	8.1 KiB	8.1 KiB	0 B
src/present-dispatcher.ts	8.0 KiB	8.0 KiB	0 B
lib/commonjs/index.js.map	7.9 KiB	7.9 KiB	0 B
node_modules/@shopify/checkout-kit-protocol/src/generated/ProtocolRenameMap.ts	7.8 KiB	5.3 KiB	-2.5 KiB
node_modules/@shopify/checkout-kit-protocol/src/generated/ProtocolNotifications.d.ts	7.6 KiB	7.6 KiB	0 B
…and 119 smaller files

Android package files (uncompressed)

These are uncompressed file sizes; they do not sum to the compressed package size above.

File	Base	Head	Delta
classes.jar	434.3 KiB	434.3 KiB	0 B
res/layout/checkout_view_content.xml	2.6 KiB	2.6 KiB	0 B
res/layout/checkout_sheet_content.xml	2.0 KiB	2.0 KiB	0 B
res/values/values.xml	1.3 KiB	1.3 KiB	0 B
R.txt	1.2 KiB	1.2 KiB	0 B
AndroidManifest.xml	922 B	922 B	0 B
proguard.txt	798 B	798 B	0 B
res/drawable/close.xml	431 B	431 B	0 B
res/menu/checkout_menu.xml	354 B	354 B	0 B
META-INF/com/android/build/gradle/aar-metadata.properties	157 B	157 B	0 B

How sizes are measured

Measured from the PR base SHA and PR head SHA. Web bundle rows sum shipped .js, .mjs, and .cjs files under dist/, excluding source maps and declarations. The gzip bundle size sums files compressed individually with gzip -n -9. npm package sizes are gzip-compressed .tgz archives; Android AAR sizes are ZIP archives. Package sizes are not final app binary sizes.