July 17, 2026 / Daily Edition / 3 stories in this issue
Lead Story Sources +4

The Hard Part of an Agent Protocol Rewrite Is Yesterday

Tau is replacing its legacy agent protocol with Pi-compatible shapes, but its more consequential promise sits at the JSONL boundary: old sessions are meant to cross without pretending the old runtime still exists.

A rough marker diagram shows old Tau JSONL session cards passing through a migration gate into a new runtime with event, tool, and extension cards, plus a caveat stamp.
Diagram PunkTau can redraw the runtime without stranding its stored sessions.
repos alejandro-ao/tau + earendil-works/pi evidence
4 source signals 2 repos 4 source signals
Evidence: 4 source signals / July 17, 2026 / Daily Edition
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