Timbre AI maps agent isolation gap

This is a sharp framing piece: it shifts the conversation from model quality to the much messier question of what trust boundary can survive arbitrary LLM-generated behavior.

• –Cursor’s shell-level execution is the clearest example of why classic editor permissions are not enough.
• –The post’s strongest point is that prompt injection turns ordinary repo, Slack, or document content into an attacker-controlled input channel.
• –E2B’s Firecracker microVM approach looks like the most credible practical boundary because it keeps hardware isolation while still allowing internet access.
• –Credential handling is the hardest unsolved problem here; once tokens, keys, and snapshots share one runtime, containment becomes a lifecycle issue, not just a sandbox issue.
• –As a series opener, it does useful groundwork by naming six concrete dimensions to evaluate agent platforms against.