refactor: remove legacy exports

[stipsan]

Description

We've stopped using legacyExports in @sanity/ui a while back, and it's no longer a feature in @sanity/pkg-utils@7. It's time to remove it from sanity and related monorepo packages as well.
This reduces the way we ship code to npm from dual ESM + CJS + legacy ESM to just dual ESM + CJS.
Building legacy exports accounts for 33% of the total build time by @sanity/pkg-utils, which impacts how long it takes for the monorepo to run pnpm build, and every CLI task that needs pnpm build, which is all of the E2E test suites, as well as the eFPS suite.
All to support legacy Node.js runtimes, and test runners like older Jest versions, that doesn't support the package.json exports field.

What to review

It builds and makes sense.

Testing

If it builds it works.

Notes for release

Legacy ESM is no longer shipped to npm. Ensure you're on Node.js v18 or later, and if using Jest make sure you're on v28 or later.

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Name	Status	Preview	Comments	Updated (UTC)
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[github-actions]

No changes to documentation

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	43.31%	56330 / 130045
🔵	Statements	43.31%	56330 / 130045
🔵	Functions	47.25%	2787 / 5898
🔵	Branches	79.59%	10500 / 13191

File Coverage

No changed files found.

Generated in workflow #33081 for commit ba59097 by the Vitest Coverage Report Action

[github-actions]

📊 Playwright Test Report

Download Full E2E Report

This report contains test results, including videos of failing tests.

[github-actions]

⚡️ Editor Performance Report

Updated Tue, 01 Apr 2025 12:58:17 GMT

Benchmark	reference latency of sanity@latest	experiment latency of this branch	Δ (%) latency difference
article (title)	24.4 efps (41ms)	23.3 efps (43ms)	+2ms (+4.9%)	✅
article (body)	59.2 efps (17ms)	59.3 efps (17ms)	-0ms (-0.3%)	✅
article (string inside object)	25.0 efps (40ms)	25.0 efps (40ms)	+0ms (-/-%)	✅
article (string inside array)	21.7 efps (46ms)	21.3 efps (47ms)	+1ms (+2.2%)	✅
recipe (name)	45.5 efps (22ms)	45.5 efps (22ms)	+0ms (-/-%)	✅
recipe (description)	50.0 efps (20ms)	50.0 efps (20ms)	+0ms (-/-%)	✅
recipe (instructions)	99.9+ efps (5ms)	99.9+ efps (6ms)	+1ms (-/-%)	✅
synthetic (title)	18.9 efps (53ms)	18.9 efps (53ms)	+0ms (-/-%)	✅
synthetic (string inside object)	20.0 efps (50ms)	17.7 efps (57ms)	+7ms (+13.0%)	✅

efps — editor "frames per second". The number of updates assumed to be possible within a second.

Derived from input latency. efps = 1000 / input_latency

Detailed information

🏠 Reference result

The performance result of sanity@latest

Benchmark	latency	p75	p90	p99	blocking time	test duration
article (title)	41ms	45ms	55ms	156ms	196ms	11.0s
article (body)	17ms	19ms	29ms	146ms	305ms	5.9s
article (string inside object)	40ms	42ms	53ms	279ms	397ms	7.7s
article (string inside array)	46ms	48ms	54ms	281ms	427ms	7.8s
recipe (name)	22ms	23ms	28ms	45ms	0ms	8.4s
recipe (description)	20ms	21ms	22ms	29ms	0ms	4.9s
recipe (instructions)	5ms	6ms	8ms	19ms	0ms	3.1s
synthetic (title)	53ms	57ms	67ms	423ms	1357ms	13.9s
synthetic (string inside object)	50ms	55ms	75ms	554ms	1135ms	9.2s

🧪 Experiment result

The performance result of this branch

Benchmark	latency	p75	p90	p99	blocking time	test duration
article (title)	43ms	45ms	55ms	281ms	377ms	11.8s
article (body)	17ms	21ms	27ms	256ms	359ms	6.0s
article (string inside object)	40ms	44ms	51ms	213ms	257ms	7.4s
article (string inside array)	47ms	51ms	57ms	108ms	330ms	7.7s
recipe (name)	22ms	24ms	25ms	42ms	0ms	8.5s
recipe (description)	20ms	21ms	23ms	51ms	0ms	4.9s
recipe (instructions)	6ms	7ms	9ms	21ms	0ms	3.2s
synthetic (title)	53ms	55ms	57ms	180ms	919ms	14.7s
synthetic (string inside object)	57ms	58ms	70ms	238ms	1049ms	8.2s

📚 Glossary

column definitions

• benchmark — the name of the test, e.g. "article", followed by the label of the field being measured, e.g. "(title)".
• latency — the time between when a key was pressed and when it was rendered. derived from a set of samples. the median (p50) is shown to show the most common latency.
• p75 — the 75th percentile of the input latency in the test run. 75% of the sampled inputs in this benchmark were processed faster than this value. this provides insight into the upper range of typical performance.
• p90 — the 90th percentile of the input latency in the test run. 90% of the sampled inputs were faster than this. this metric helps identify slower interactions that occurred less frequently during the benchmark.
• p99 — the 99th percentile of the input latency in the test run. only 1% of sampled inputs were slower than this. this represents the worst-case scenarios encountered during the benchmark, useful for identifying potential performance outliers.
• blocking time — the total time during which the main thread was blocked, preventing user input and UI updates. this metric helps identify performance bottlenecks that may cause the interface to feel unresponsive.
• test duration — how long the test run took to complete.

[bjoerge]

This is great!