No. Claude.ai is a consumer product — you have no access to the API layer underneath it. cache_control is an API-level feature only. This plugin works exclusively when you're making direct Anthropic API calls, either through the SDK in your own code or through MCP-compatible clients like Claude Code, Cursor, Windsurf, etc.
I was sharing an old Turkish pop track on Spotify (“Füsun Önal – Ah Nerede”, 2004). Instead of the expected album art, Instagram showed a completely unrelated person’s Instagram profile screenshot, basically a silent injected ad.
I dug into how Spotify generates Instagram story assets and mapped possible attack vectors in the legacy catalog pipeline. Curious if anyone’s seen similar behavior with older metadata ingestion paths.