Sashiko (刺し子, "little stabs") borrows its name from a Japanese reinforcement-stitching technique — fabric repaired and strengthened at its points of wear. The metaphor is the whole pitch: an agentic system that stitches over the weak spots in proposed Linux kernel patches before they land. It's written in Rust …

If you are shipping agentic systems in 2026 and these six terms are fuzzy, you are building on sand. This is the foundational vocabulary — not hype, not vendor marketing, just the concepts that actually show up when you are designing, debugging, or scaling an agent pipeline.

The Six Terms

Model …