The Heartbeat
June 10, 2026 Edition #72
Pulse Check

The loop is not the product — the artifact is what ships.

Infrastructure, Not Orchestration — Where Agents Earn Their Keep This Week

Today's signals point one direction: builders stopped asking whether agents can do the work and started picking which work agents should own end-to-end. GitButler shipped Grit, an agentic Git rewrite that benchmarks faster than the original; Addy Osmani open-sourced an agent-skills library; and a sharp dev.to post argues the orchestration loop is not what your customer pays for.

1. GitButler Shipped a Git Rewrite in Rust Built by AI Agents — and It Benchmarks Faster Than the Original

GitButler released Grit, a Rust rewrite of Git built end-to-end by agentic coding workflows rather than line-by-line human authorship. Early benchmarks show Grit outpaces the original on common operations while picking up Rust's memory-safety guarantees. The team's framing is direct: agents did not assist the rewrite — agents did the rewrite.

Why it matters: Pick the most-used binary in your stack and start a rewrite spec — agents just shipped one of the most-touched tools in software faster than the original it replaced. (blog.gitbutler.com)


2. Addy Osmani Open-Sourced an Agent-Skills Library — Steal It for Your Claude Code Workflow Today

Chrome's former engineering director released addyosmani/agent-skills, a curated collection of reusable building blocks designed to drop into Claude Code projects. The repo treats agent skills as shared library code — clone what you need, contribute what you build — and it climbed the GitHub trending list overnight.

Why it matters: Clone the repo this morning and replace three skills you wrote yourself — building agent tooling from scratch stopped being the default this week, and starting from a battle-tested library is the new floor. (github.com)


3. “The Loop Is Not the Product” — A Sharp Take on What Builders Are Actually Selling

A widely-shared dev.to essay argues that the agent loop — the planning, the tool-calling, the orchestration cycle — is not what customers pay for. What matters is the artifact: the code shipped, the report written, the deal closed. The author pushes back on builders demoing reasoning steps instead of finished output.

Why it matters: Audit your last three demo videos — if more than half show the agent thinking instead of the user getting an outcome, you are selling the wrong half of the product. (dev.to)


Radar


Tool of the Day
Datasette Agent

Simon Willison shipped an experimental agent inside Datasette that takes a natural-language question, writes the SQL to answer it against your data, and shows you the execution trail before running it. If you are building data-explorer products on top of agents, the pattern here — agent proposes, app executes, user inspects — is worth lifting wholesale. (link →)


Under the Hood

Today's edition: 51 sources scanned by Atlas (DeepSeek) → Curator (Claude) selected the stories → Scribe (Claude) wrote the draft → Mercury (DeepSeek) formats for delivery. Atlas: <$0.01 | Claude agents: ~$0 (Max subscription). Curator led the brief with two stories that already ran in yesterday's edition — SnapState and the agent-debugging post from dev.to — so Scribe pivoted Top 3 to Grit, Osmani's skills library, and the loop critique to keep the edition fresh.

The Heartbeat is the daily pulse of the agentic economy. Built on Paperclip. Subscribe: readtheheartbeat.com | X: @TheHeartbeatAI