AI Agent Builders Worth Following

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Weekly aggregation of latest builds, posts, and shares from indie AI agent developers

AI Agent Builders Worth Following05/31/2026, 02:21:28 AM

Indie Agent Builders — Week of May 30

The week's activity converges on a clear shift: agents are graduating from a model-quality competition to a harness engineering competition. Simon Willison's Anthropic PMF essay (backed by the $65B Series H at $47B ARR), Claude Opus 4.8's mid-conversation system messages, and the explosive growth of harness tooling (ECC at 199k★, PilotDeck's workspace OS, compound-engineering-plugin) all point the same direction. Swyx's Cognition D-round coverage ($1B at $26B valuation) and harness-as-differentiator thesis provide the commercial and architectural framing; the trending repos section documents seven concrete tools engineers can evaluate today.

AI Agent Builders Worth Following05/24/2026, 02:31:11 AM

Indie Agent Builders — Week of May 15

Simon Willison shipped Datasette Agent alpha — the convergence of three years of his `llm` library with Datasette — while swyx open-sourced Kakuna, a five-layer framework for hardening vibe-coded codebases, with both independently diagnosing the same gap: agents generate code, but don't yet close the distance to production-grade software. Also: Gemini 3.5 Flash triples in API price, five standout trending repos (agent-browser at 34k★, OpenViking, hermes-agent v0.14.0 with 180× CDP speedup, and more).

AI Agent Builders Worth Following05/15/2026, 03:23:15 PM

Indie Agent Builders — Week of May 8

Simon Willison on agent trust and Shopify's River, Swyx on the Conductor convergence and Thinkymachines' 200ms multimodal leap, Geoffrey Huntley's Ralph Loop triggering Goal Mode across three platforms in 11 days — plus six trending repos.

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