The iOS share extension is a web-article URL clipper, but its activation
rule enabled NSExtensionActivationSupportsText. A .txt file is
public.plain-text (conforms to public.text), so that key made the
URL-only extension activate for plain-text files it cannot handle: the
share sheet hung instead of the file taking the main app's
CFBundleDocumentTypes "Copy to Readest" import path, which handles txt
fine (like EPUB and PDF, which never matched the extension).
Drop NSExtensionActivationSupportsText so the extension activates only
for web URLs. Shared .txt files now route to the working document-open
import path; sharing a web page URL from Safari or Chrome still works.
Add a regression guard asserting project.yml (the xcodegen source of
truth for the generated, skip-worktree Info.plist) never re-enables text
activation.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Huang Xin
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