Claude Opus 4.8, Undocumented Claude Code Features, Eval Harness for AI Skills, Pope on AI

"Every time you vibe code, you're gonna spend compute to skip the bottleneck of code review." — Shimin's cold open on ep-28. Trading compute for human labor: that's the default that's coming.

This week on ADI Pod: Claude Opus 4.8 and Anthropic's dynamic-workflow tool, Pope Leo XIV's AI encyclical, a deep read of the Claude Code source code, a Pinterest method for testing whether your AI skills actually fire, two essays on senior engineering and the "dead economy," and a bubble check full of S-1s. Rahul's out this week; the clock moves up to 5:30.

▸ Claude Opus 4.8 + the Dynamic Workflow Tool (TechCrunch): a 41-day fast-follow to 4.7. The new "dynamic workflow" is extra-high thinking plus a huge fan-out of coordinated parallel agents — the hosts call it "Gastown, by Anthropic." Dan likes it more than 4.7, but it hallucinated file names that don't exist and ate a full token budget in 25 minutes. Likely a Mythos distill, not a new base model.

▸ Pope Leo XIV's AI Encyclical — "Magnifica Humanitas" (Vatican): "On Safeguarding the Human Person in the Time of Artificial Intelligence." The Pope gets that models are grown, not developed, warns against pretending AI is neutral, and ties automation to worker protection. Anthropic's Chris Olah was in the room. Shimin's take: better AI takes than most Fortune 500 CEOs.

▸ I Read the Claude Code Source Code (Building Better): the undocumented stuff. A pre-tool-use hook can rewrite a tool's input mid-flight, return allow/deny with a reason, and inject context. Skills take undocumented front-matter (model + effort). Plus where settings.json really lives, and the auto-memory and "dream" toggles.

▸ Technique Corner — An Engineer's Guide to Better AI Skills (Pinterest): a test harness for skill invocation — 15 positive prompts, 5 negative, 5 runs each. Codex went 73%→95% with everything combined; Claude went 62%→73% on a single change and got worse when you combined them. Asking the AI to improve the skill didn't help.

▸ Post Processing — Is This Sustainable? (Jamie Hurst): seniors absorbed AI's rising stakes before juniors did. You skip the RFC and just build the thing. The scary part: AI depth is perishable in ~18 months; what lasts is taste and judgment.

▸ Post Processing — The Dead Economy Theory (Owen McGrann): a turn-by-turn case that replacing workers with AI eats its own market. Peter Thiel, a Valley misread of Nietzsche, and UBI. Shimin pushes back while half-infected by the inevitability virus.

▸ Two Minutes to Midnight (SEC + Qazinform): SpaceX's S-1 claims a $26.5T market that's mostly "AI" and says "truth seeking" 39 times. Anthropic overtakes OpenAI as the most valuable AI startup on a $65B Series H (~3x its February mark) plus a confidential S-1. Microsoft pulls Claude Code back to Copilot on cost. Clock -> 5:30.

⏱ Chapters

00:00 Cold Open & Welcome

02:09 News: Claude Opus 4.8 & the Dynamic Workflow Tool

08:27 News: Pope Leo XIV's AI Encyclical

14:17 ToolShed: I Read the Claude Code Source Code

22:10 Technique Corner: Do Your AI Skills Actually Fire?

29:15 Post Processing: Is This Sustainable? (Senior Eng in the AI Age)

35:30 Post Processing: The Dead Economy Theory

42:12 Two Minutes to Midnight: SpaceX's S-1 & the $26.5T "AI" TAM

45:50 Two Minutes to Midnight: Anthropic Overtakes OpenAI

53:35 Outro

🔗 Articles we discussed

News:

• Anthropic releases Opus 4.8 with new dynamic workflow tool — TechCrunch: https://techcrunch.com/2026/05/28/anthropic-releases-opus-4-8-with-new-dynamic-workflow-tool/

• Magnifica Humanitas (encyclical on AI) — Pope Leo XIV / Vatican: https://www.vatican.va/content/leo-xiv/en/encyclicals/documents/20260515-magnifica-humanitas.html

• I Read the Claude Code Source Code — Building Better: https://buildingbetter.tech/p/i-read-the-claude-code-source-code

Technique Corner:

• An Engineer's Guide to Better AI Skills — Pinterest Engineering: https://medium.com/pinterest-engineering/an-engineers-guide-to-better-ai-skills-implementing-a-testing-process-to-optimize-agent-a000c9c9abcd

Post Processing:

• Is This Sustainable? — Jamie Hurst: https://jamiehurst.co.uk/2026-05-24_ai-sustainable

• The Dead Economy Theory — Owen McGrann: https://www.owenmcgrann.com/p/the-dead-economy-theory

Two Minutes to Midnight:

• SpaceX (Space Exploration Technologies) Form S-1 — SEC EDGAR: https://www.sec.gov/Archives/edgar/data/1181412/000162828026036936/spaceexplorationtechnologi.htm

• Anthropic surpasses OpenAI to become world's most valuable AI startup — Qazinform: https://qazinform.com/news/anthropic-surpasses-openai-to-become-worlds-most-valuable-ai-startup

🎙 About ADI Pod

ADI Pod (Artificial Developer Intelligence) is a weekly podcast about AI and software development for working developers. We go through hundreds of links and dozens of newsletters each week so you don't have to. Hosts: Shimin Zhang, Dan Lasky, Rahul Yadav. New episodes Tuesdays.

• https://www.adipod.ai

• [email protected]

If something here gave you something to try on Monday, subscribe and tell us what you tried.

• (00:00) - Cold Open & Welcome
• (02:09) - News: Claude Opus 4.8 & the Dynamic Workflow Tool
• (08:27) - News: Pope Leo XIV's AI Encyclical
• (14:17) - News / Tool Shed: I Read the Claude Code Source Code
• (22:10) - Technique Corner: Do Your AI Skills Actually Fire?
• (29:15) - Post Processing: Is This Sustainable?
• (35:30) - Post Processing: The Dead Economy Theory
• (42:12) - Two Minutes to Midnight: SpaceX's S-1
• (45:50) - Two Minutes to Midnight: Anthropic Overtakes OpenAI
• (53:35) - Outro