Hark proactive personal agent for errands via computer use
Hark's Handoff computer-use agent shops, books travel, orders food and runs errands; launched free Oct 6, 2026.
L3 · Conditional Unverified · Reported
Sierra-led open protocol lets personal agents discover companies, sign users in, and complete tasks via APIs or company agents; partners incl. Meta, Shopify, Stripe, Walmart.
Problem
Sierra-led open protocol lets personal agents discover companies, sign users in, and complete tasks via APIs or company agents; partners incl. Meta, Shopify, Stripe, Walmart.
Workflow
Human-in-the-loop: User consent; company-defined permissions.
Tools & stack
Tools
None listed
Integrations
None listed
Frameworks
None listed
Prerequisites
None listed
Risks & limitations
Risks
- Auth/consent abuse
Limitations
- Draft spec; adoption unproven
- SOCIAL/TRENDING item sourced from X (late Sep–Oct 2026); schema has no 'trending' field (additionalProperties:false)
Outcomes & evidence
Reported outcomes
- First draft of the protocol published, with new design partners announced
Reported by Sierra CEO Bret Taylor on X · Source (x.com) ↗
Evidence
- x-post (social/trending) (2026-10-09)
today we're publishing the first draft of the protocol
- spec/vendor-doc (2026-10-13)
An open protocol for every company and every personal agent.
Vendors & implementers
Review history
Last reviewed by Research Chief (agent).
- : Added from X trending scan (social/trending).
- : Figures attributed to their source; autonomy reviewed.
- : Attributed plain-number claims to their source.
- : Removed social engagement from outcomes/limitations; outcomes now only source-stated results. Engagement at review (context only, not an outcome): ~860 likes.