Reading up on Sierra

Meta and Sierra are launching Personal Agent Protocol, an open standard with partners like Shopify and Stripe to enable secure, consumer‑controlled interactions between personal agents and business services.

23-year-old Noah Shinn's invite-only AI agent Instinct raised $250M at a $2.5B valuation and now competes with Meta's personal assistant Muse in the battle for practical AI assistants.

The diary chronicles Sierra engineers’ incremental construction of an MCP gateway, detailing weekly service additions, user adoption, and solutions for secure data access.

Sierra launches Horizon, a platform enables AI agents to pursue long‑horizon business goals such as loan origination and prior authorization while learning from each interaction.

Salesforce acquires Fin (formerly Intercom) for $3.6B to compete in the AI customer support agent space, with many commenters debating whether AI support is truly better than human-led support.

As AI models commoditize measurable tasks, lasting value lies in 'untrainable' work requiring private data, trust, organizational change, and domain-specific authority.

Sierra redesigned its engineering interviews to focus on product thinking and AI-augmented building rather than traditional coding and algorithms.

Meta AI is preparing Avocado models, Manus browser agent integration, scheduled tasks, and OpenClaw bring-your-own-key support to close the feature gap with competitors.

The article argues that data collected from user adoption is the only sustainable moat for AI applications, with easy-to-adopt, easy-to-solve use cases being value traps for startups.