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Article · Tuesday, May 19, 2026

Agentic Coding

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By Marius BongartsTech9 editions
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Agentic Coding
Tuesday, May 19, 2026
AI Agents - Agentic Coding

HTML beats Markdown, citation loops catch hallucinations, permission modes unlock flow

1 min read

HTML replaces Markdown

Markdown might be holding you back.

Anthropic's Thariq Shihipar argues that switching to HTML for AI-assisted planning dramatically improves collaboration [Source: ChatPRD]. His workflow treats only 1% of generated tokens as production code—the rest goes into interactive HTML plans and disposable micro-apps that let you edit specific components visually. He also maintains a portable HTML design system that Claude references to keep visual consistency across projects. The shift reframes you as a compute allocator, not just a prompt writer.

Try converting your next PRD to an interactive HTML scaffold.

Self-checking research skill

Your agent can now fact-check itself.

A new Claude Code skill called Jean runs automated verification loops during research tasks [Source: Substack]. It scopes requirements first, conducts three targeted search cycles across academic databases, triangulates sources, and verifies DOIs and URLs to prevent hallucinated citations. The skill highlights open questions it couldn't resolve rather than papering over gaps. You can install and customize it for your own workflows.

Worth adding if you're tired of manually checking every source.

Permission mode cycling

Stop clicking approve on every file edit.

Claude Code's five permission modes let you match safety to your current task—Normal for production code, Auto-Accept for flow state during large refactors, Plan mode for exploration without changes, and stricter modes for CI/CD [Source: ClaudeFast]. Hit Shift+Tab to cycle through them instantly. You can also set your preferred default in settings.json so each session starts where you want it.

Auto-Accept pairs well with the well-defined implementation plans you're already building.

Matt Pocock's skills expand

Following up on the earlier coverage, the alignment drills now have company.

Matt Pocock's skills repo adds /to-prd for converting loose discussions into structured specs and /zoom-out for stepping back to system-level architecture [Source: GitHub]. The collection targets four failure modes: misalignment, verbosity, poor code quality, and architectural decay. Each skill is composable and model-agnostic, designed for real engineering rather than unreviewed vibe coding.

The /tdd skill slots nicely into your existing red-green-refactor loops.

Sources
How I Built an AI Research Skill That Checks Its Own Citations
How I Built an AI Research Skill That Checks Its Own Citations
23 hours ago ... Once installed, you just type “Jean, research [topic]” and Claude runs the workflow. ... (If you missed my beginner's guide to Claude Code, read it here). A ...
evakeiffenheim.substack.com
AI Summary

The content describes a Claude Code research skill called "Jean" that demonstrates advanced agentic coding practices relevant to your interests. The skill implements a structured protocol with verification loops for AI-assisted research: it scopes requirements before searching, conducts three cycles of targeted research across academic databases, evaluates sources through triangulation, fact-checks citations to prevent hallucinations by verifying DOIs and URLs, and highlights open questions in the field. The author emphasizes building automated verification loops and following clear protocols to direct AI toward high-quality outputs, presenting this as a practical example of how to work effectively with Claude Code for complex tasks. The skill is customizable and available for installation, demonstrating both the methodology and practical implementation of agentic coding for research workflows.

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How I AI: Thariq Shihipar on Replacing Markdown with HTML for AI ...
How I AI: Thariq Shihipar on Replacing Markdown with HTML for AI ...
17 hours ago ... When Thariq Shihipar, an engineer on the Claude Code team at Anthropic, told me “HTML is the new markdown,” I knew I was in for a treat. We were at the Code ...
chatprd.ai
AI Summary

Thariq Shihipar from the Claude Code team at Anthropic advocates replacing Markdown with HTML for AI-assisted development workflows to improve human engagement and collaboration. He demonstrates three key workflows: using interactive HTML for brainstorming and planning instead of overwhelming text documents, building disposable micro-apps as custom UIs to edit specific plan components, and creating a portable "living design system" in HTML that Claude can reference to maintain visual consistency across projects. This approach treats only 1% of generated tokens as production code, with the remaining 99% spent on rich scaffolding like interactive plans and custom interfaces that help developers act as "compute allocators" making better decisions about resource allocation.

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mattpocock/skills: Skills for Real Engineers. Straight from ... - GitHub
mattpocock/skills: Skills for Real Engineers. Straight from ... - GitHub
13 hours ago ... General workflow tools, not code-specific. caveman — Ultra-compressed ... git-guardrails-claude-code — Set up Claude Code hooks to block dangerous git ...
github.com
AI Summary

Matt Pocock's agent skills collection directly addresses your workflow optimization needs. The repository provides battle-tested prompts for Claude Code and similar agents, focusing on solving four critical failure modes: misalignment between you and the agent (fixed via /grill-me and /grill-with-docs for deeper requirement gathering), excessive verbosity (solved through building a shared domain language in CONTEXT.md), poor code quality (addressed via /tdd for red-green-refactor loops and /diagnose for structured debugging), and architectural decay (prevented through /improve-codebase-architecture and /zoom-out for system-level perspective). Key skills relevant to your PRD and agentic coding workflow include /to-prd for converting discussions into structured specifications, /grill-with-docs for aligning with agents while documenting architectural decisions, and /tdd for maintaining code quality through test-driven development—all designed to be composable, model-agnostic, and practical for real engineering rather than "vibe coding."

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Claude Code Permissions: Safe vs Fast Development Modes
Claude Code Permissions: Safe vs Fast Development Modes
22 hours ago ... Claude Fast | Configure Claude Code permissions for your workflow. Learn when to use auto-accept mode and when to maintain strict controls for safety.
claudefa.st
AI Summary

Auto-Accept mode eliminates permission prompts for file edits, enabling uninterrupted execution during intensive coding sessions—ideal for large refactoring operations, following well-defined implementation plans, and repetitive multi-file operations. You can cycle through Claude Code's five permission modes instantly using Shift+Tab, matching each mode to your development phase: Normal mode for learning and production code, Auto-Accept for active development flow, Plan mode for codebase exploration and code review, Don't Ask mode for CI/CD pipelines with pre-approved tools, and Bypass mode only for isolated environments. For consistent workflow optimization, set your preferred default permission mode in settings.json so you start each session in the right configuration without manual toggling.

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