← 2026-W19

2026-W19 · 2026-05-04

Kalshi, Spectacles, and Stripe Sessions 2026 — agentic commerce gets its protocols

Day view · 2026-05-04 → 2026-05-10

Tarek Mansour on building Kalshi against the regulators, Evan Spiegel on Spectacles and the post-feed internet, and the Stripe Sessions 2026 keynote with MPP, UCP, Stripe Database, Treasury, and the agentic commerce stack.

TL;DR · the week in 30 points

6 items · May 4

May 4Uncapped

Uncapped (Jack Altman): Tarek Mansour on building Kalshi — hackathon → CFTC fight → landmark 2024 win

  • YC hackathon Oct 2018: judges said the idea was "not allowed in the US" — they won anyway.
  • CFTC approved Kalshi as a regulated exchange Nov 2020; Kalshi sued the government in 2023 over a blocked election market.
  • Landmark Oct 2024 ruling redefined gambling vs financial markets — Kalshi is a regulated exchange + clearing house.
  • Open book: users trade against each other, Kalshi takes a transaction fee — no house.
  • ~127 people, no managerial layers, self-organizing around the company's most critical problem at any time.
May 4Cheeky Pint

Cheeky Pint: Evan Spiegel on Spectacles, the post-feed internet, and AI-written code at Snap

  • Spectacles thesis: phones isolate, see-through glasses are social by default — opposite of VR headsets.
  • Snap built its own Linux-based OS to escape Android bloat at glasses weight.
  • >2/3 of new code at Snap is now AI-written.
  • Snapchat separates social (private messaging) from media (Discover) — sidesteps endless-feed incentives.
  • Snapchat+ at 25M subscribers; Norway was the first country to embrace Snap.
May 4Stripe Sessions

Stripe Sessions 2026 Keynote: Projects, Database, Checkout Studio, Treasury, Signals + MPP and UCP protocols

  • Stripe Projects: agents deploy services, DBs (Supabase), hosting (Vercel) programmatically.
  • Stripe Database = Postgres-shaped read API over your business data, queryable by agents.
  • Two new protocols: MPP (agent-to-agent payments via Link wallet) and UCP (cross-platform commerce standard).
  • Stripe Treasury: multicurrency, FDIC-insured US balances, payouts to 160 countries, stablecoin rails.
  • Public roadmap at stripe.com/roadmap through Q1 2027 — Meta, Amazon, Salesforce, Microsoft on UCP committee.
May 4GitHub

RTK (Rust Token Killer): CLI proxy that compresses dev-command output before it hits the LLM context

  • 13,454 commands run · 17.9M tokens saved (35.9%) on my Claude Code sessions.
  • Single Rust binary, zero deps, <10ms overhead — drop-in CLI proxy that compresses tool output.
  • Hook rewrites bash commands transparently (git status → rtk git status); the model only sees compressed output.
  • Best savings on lint (~98%), gh pr/issue calls (~99%), and curl-style fetches (~95–98%).
  • Works with Claude Code, Cursor, Gemini CLI, Aider, Codex, Windsurf, Cline.
May 4GitHub

context-mode: MCP sandbox + per-project SQLite that gives Claude Code session continuity (98% context reduction)

  • 98% context reduction on tool output (e.g., 315 KB → 5.4 KB) by sandboxing execution.
  • Per-project SQLite captures every meaningful event so /compact and --continue rebuild your working state automatically.
  • Registers PreToolUse / PostToolUse / PreCompact / SessionStart hooks + 11 MCP tools (6 sandbox, 5 meta).
  • Install via Claude Code: /plugin marketplace add mksglu/context-mode → /plugin install context-mode@context-mode.
  • Full continuity on Claude Code, Gemini CLI, VS Code Copilot, JetBrains Copilot — 14 platforms supported.
May 4GitHub

Compound Engineering plugin (Every): 37 skills + 51 agents — /ce-setup green across 7/7 tools

  • Every-built official plugin — 37 skills + 51 agents covering review, planning, ideation, design, debugging, docs.
  • Install: /plugin marketplace add EveryInc/compound-engineering-plugin → /plugin install compound-engineering.
  • /compound-engineering:ce-setup runs check-health and reports Plugin v3.4.1 · 7/7 tools · 1/1 skills green.
  • Tools provisioned: agent-browser, gh, jq, vhs, silicon, ffmpeg, ast-grep.
  • Same plugin already underpins many of the agents I delegate to in /skills.

Timeline · commits + curated notes

2 entries

  1. noteAdded 3 dev-tooling finds to built rail: RTK (token killer), context-mode (MCP sandbox + SQLite session continuity), Compound Engineering plugin v3.4.1.
  2. noteInitial publish — three watched entries (Kalshi, Spiegel, Stripe Sessions 2026 keynote) with anchored prose sections.