# Hotfix Daily

> Hotfix Daily is a free weekday email newsletter: the daily AI builder digest. Each issue covers five things worth a builder's attention in AI, AI agents, vibe coding, and game development, each with a one-line "why builders care" and a source link, plus one practical "Try this today" tip. Issues are under about 450 words (about a 3-minute read) and arrive Monday to Friday mornings, US Central time.

Key facts:
- Name: Hotfix Daily
- What: daily AI builder digest (email newsletter)
- Topics: AI models and launches, AI agents and agent tooling, vibe coding (Cursor, Claude Code, Codex and similar), AI in games and game dev, notable open-source repos
- For: developers, indie hackers, vibe coders, and game developers who build with AI
- Frequency: weekdays (Monday to Friday)
- Price: free (some issues may carry one clearly labeled sponsor)
- Subscribe: https://hotfixdaily.com/#subscribe
- Archive: https://hotfixdaily.com/issues/
- Feeds: https://hotfixdaily.com/feed.xml (Atom), https://hotfixdaily.com/rss.xml (RSS)
- Contact: hello@hotfixdaily.com · Sponsorships: sponsors@hotfixdaily.com
- X (Twitter): https://x.com/hotfixdaily (@hotfixdaily)

## Guides (sourced, last reviewed 2026-10-21)

- [The best AI coding agents for builders (October 2026)](https://hotfixdaily.com/guides/ai-coding-agents/): A sourced guide to AI coding agents (Oct 2026): Cursor, Claude Code, Codex, Copilot, Devin Desktop, Gemini CLI, Jules, Kiro, Cline and more, by where they run.
- [Vibe coding tools: build apps by describing them (October 2026)](https://hotfixdaily.com/guides/vibe-coding-tools/): A sourced guide to vibe coding tools (Oct 2026): Lovable, Bolt, v0, Replit, Base44, Rork and Firebase Studio, when to graduate, and a pre-launch checklist.
- [AI game dev tools in 2026: engines, assets, NPCs and prototyping](https://hotfixdaily.com/guides/ai-game-dev-tools/): A sourced guide to AI game dev tools (Oct 2026): Unity's AI tools, Unreal 5.8 MCP, Roblox Assistant, plus Scenario, Meshy, Ludo.ai, Inworld and more.
- [The AI Builder Starter Stack](https://hotfixdaily.com/starter-stack/): A free one-page starter stack for building with AI in 2026: coding agents, app builders, models, hosting and game tools, plus 5 rules for shipping agent code.

## Issues (newest first)

- [Hotfix Daily #1: Mercury 3, Voxtral 3, Beacon and more](https://hotfixdaily.com/issues/001/) (2026-10-21): Inception ships Mercury 3, a diffusion model built for speed; Mistral launches Voxtral 3 and a voice agent SDK; Beacon: shared memory for your coding agents; Game studios use AI everywhere, but not deeply; Repo of the day: Google's Harness²

## About

- [About Hotfix Daily](https://hotfixdaily.com/about/): how issues are researched and sourced; sponsor and corrections policy
- [Sponsor Hotfix Daily](https://hotfixdaily.com/sponsor/): ad formats and founding-sponsor rates
- [Privacy policy](https://hotfixdaily.com/privacy/)

## Optional

- [Full text of guides and recent issues](https://hotfixdaily.com/llms-full.txt)
- [Hotfix Daily on X](https://x.com/hotfixdaily)
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