Use slim Static Site Importer 1.9.5

[chubes4]

Summary

Update the default Static Site Importer release used by studio create --from from the full v1.8.5 package to the v1.9.5 html-site-import package.

The slim package is self-contained for Studio's portable HTML import path: it includes Static Site Importer and PHP Transformer 0.9.3, while excluding unused Figma, Markdown/MDX, and Composer runtime dependencies.

Release: https://github.com/Automattic/static-site-importer/releases/tag/v1.9.5

Published asset: static-site-importer-html-site-import.zip

• Size: 1303735 bytes
• SHA-256: 156e24b7e0805a32c3003d66d60b286a837c2048c63dfa9eb952dcf277d5b8c9

Why 1.9.5 rather than 1.9.3

This PR originally pinned v1.9.3, which vendors PHP Transformer 0.9.1. That predates Automattic/blocks-engine#1545, so the pinned runtime did not contain the authored-input, documentation-navigation, breadcrumb-flow, syntax-token, or native code and grid conversion fixes. The pin was advanced through a full release chain so the Studio default carries them:

1. blocks-engine php-transformer-v0.9.3
2. Static Site Importer Update PHP transformer to 0.9.3 static-site-importer#1520, then v1.9.5
3. This Studio pin

Testing

• Built this branch's CLI and ran native site create --from against the Blocks Engine 83-startup-docs-hub fixture using the default published URL, without a local package override.
• Source-of-truth manifest records SSI 1.9.5, PHP Transformer 0.9.3, and no Figma Transformer.
• Front page ID 5 is published with 70 native blocks and zero fallback, core/html, freeform, invalid, content-loss, or empty-conversion blocks.
• Import validation passed every quality gate, including asset materialization, runtime dependency parity, and semantic parity; the served front end returns HTTP 200 with the runtime search control and native navigation present.
• Verified the downloaded release asset hashes to the SHA-256 above and that its vendored transformer contains the blocks-engine#1545 navigation fix, so the pin demonstrably carries the intended code rather than only a newer version string.
• 89-static-site-importer-architecture is covered by the solved-site promotion gate, which passed against PHP Transformer 0.9.3 on Update PHP transformer to 0.9.3 static-site-importer#1520.
• Studio CI is green on this commit, including Lint, Unit Tests, E2E Tests, CLI E2E Tests, Performance Metrics, CodeQL, and Data Liberation.

AI assistance

OpenAI GPT-5.6 Sol via OpenCode diagnosed that the released pin predated blocks-engine#1545, orchestrated the blocks-engine and Static Site Importer releases through Homeboy, updated the Studio pin to the slim v1.9.5 runtime, and verified the result through the built Studio CLI and published release artifact. Chris Huber directed and approved the work.

[wpmobilebot]

📊 Performance Test Results

Comparing 2710e3f vs trunk

app-size

Metric	trunk	2710e3f	Diff	Change
App Size (Mac)	1435.61 MB	1435.19 MB	0.42 MB	⚪ 0.0%

site-editor

Metric	trunk	2710e3f	Diff	Change
load	1177 ms	1165 ms	12 ms	⚪ 0.0%

site-startup

Metric	trunk	2710e3f	Diff	Change
siteCreation	7510 ms	7524 ms	+14 ms	⚪ 0.0%
siteStartup	3387 ms	3399 ms	+12 ms	⚪ 0.0%

---

Results are median values from multiple test runs.

Legend: 🟢 Improvement (faster) | 🔴 Regression (slower) | ⚪ No change (<50ms diff)

[wojtekn]

@chubes4 thank for updating the tool, it looks good.

E2E failed on Windows, but it looks like flakiness. I merged trunk into the branch to make it up to date and to trigger tests again.

[chubes4]

I'm going to update the pin one more time before I merge this. Thanks for taking a look. I have been working on the importer a lot.