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Extensible Software in the age of LLMs
Jeremy Morrell outlines how web platforms can leverage sandboxed 'Dynamic Workers' to allow users to securely extend applications via AI-generated code.
What: Morrell advocates for a model where SaaS providers offer an extensible core, allowing users to inject custom logic through V8 isolates or similar sandboxes, using capability-based security to avoid exposing dangerous API keys.
Why it matters: This addresses the tension between wanting to build highly specific workflows and the impossibility of developers catering to every long-tail user requirement.
Takeaway: If building a platform, use an object-capability model—passing functions like `getApprovedEmail()`—instead of providing raw API credentials or broad proxy access to untrusted code.
Decoder
- V8 Isolates: Lightweight execution contexts that allow multiple snippets of JavaScript to run on a single machine with strong memory and security boundaries.
- Object Capability (ocap): A security model where access to resources is granted through specific references rather than ambient authority (like a global secret key).
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