Erin Sparling everyplace

Workarounds for "Letting AI See SwiftUI": device and orientation in RenderPreview

Notes on the open problems in fatbobman's post, from driving Xcode's MCP bridge (xcrun mcpbridge) from an external agent. Observed on Xcode 27.0 RC, with plain #Preview (no PreviewProvider).

Orientation: solved with `previewVariantOverrides`

Every RenderPreview result includes a supportedPreviewVariantOverrides field listing the variants that preview accepts. Pass one back as previewVariantOverrides and the render uses it:

Important

Re-verified against Xcode 27.0 beta (build 27A5194q) on 2026-06-16. The defaults below still exist, but the agent launch path and the external-agent approval flow both changed since 26.3. See What changed in 27.0 and the external-agent test.

Disable Xcode's agent permissions checks

Note

This covers "how to let Xcode's own agent reach outside itself without prompting." It does not solve the reverse: getting a terminal agent to drive Xcode without the per-launch prompt. That one is still open; see the bottom.

Setting this is the moral equivalent of claude --dangerously-skip-permissions, so weigh it accordingly.

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Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
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Unless required by applicable law or agreed to in writing, software

Keybase proof

I hereby claim:

I am everyplace on github.
I am everyplace (https://keybase.io/everyplace) on keybase.
I have a public key ASBku7Xg52Syqa-w2lLWyaLp4eNiG1QuPu7rLINsziCunQo

To claim this, I am signing this object:

OOCSS vs OOSass

OOCSS is awesome because it helps us organize our style sheets in clean and simple ways but it can be far too rigid for the new responsive web. How can we use preprocessors to preserve both flexibility and cleanliness of code? Can these objects be abstracted to our preprocessors?

Lets first take a look at three column widths in OOCSS to see how they compare.

CSS

.width-1 {

	#!/bin/sh

	# ci_post_clone.sh
	#
	# Created by Erin Sparling on 3/01/24.
	#
	# Put this file in ci_scripts/ in the root of your project.

	# https://social.jvns.ca/@b0rk_reruns/112033146491358262
	set -euo pipefail

	COOKIE_SECRET="It's a secret to everybody"
	FLICKR='{"api_key":"XXXXXX", "api_secret":"XXXXXX", "callback_url":"https://XXXXXX/auth/flickr/callback"}'
	TWITTER='{"consumer_key":"XXXXXX", "consumer_secret":"XXXXXX","request_token_url":"https://api.twitter.com/oauth/request_token","authorize_url":"https://api.twitter.com/oauth/authorize","access_token_url":"https://api.twitter.com/oauth/access_token","callback_url":"http://XXXXXX/auth/twitter/callback"}'
	GOOGLE='{"web":{"auth_uri":"https://accounts.google.com/o/oauth2/auth","client_secret":"XXXXXX","token_uri":"https://accounts.google.com/o/oauth2/token","client_email":"XXXXXX","redirect_uris":["https://XXXXXX/auth/google/callback"],"client_x509_cert_url":"https://www.googleapis.com/robot/v1/metadata/x509/XXXXXX","client_id":"XXXXXX","auth_provider_x509_cert_url":"https://www.googleapis.com/oauth2/v1/certs","javascript_origins":["XXXXXX"]}}'
	GOOGLE_SCOPE='["https://www.googleapis.com/auth/userinfo.profile","https://www.googleapis.com/auth/userinfo.email"]'
	GOOGLE