What's New
New and updated lessons and guides. Newest first.
2026-10-04
FixedThe JTBD.info link is gone from the Jobs to Be Done lesson and the Resources page because the site could not be reached. The Christensen book, the Intercom guide and the HBR article are still listed if you want to go deeper.Jobs to Be Done
2026-09-30
FixedThe Claude Code documentation links in the Level 04 lessons now go straight to the official docs at code.claude.com/docs.CLAUDE.mdMulti-Agent SystemsThe Crew Model
2026-09-29
NewFile Systems00 OrientationNewRepositories00 OrientationNewDNS00 OrientationNewWhat Is VECTOR.md?01 FoundationNewSetting Up a ProjectApproach GuideNewManaging Revision HistoryApproach Guide
UpdatedThe DNS lesson now matches Netlify's current steps for connecting your own domain: open your project, select Domain management in the left sidebar, then choose Add a domain and Add a domain you already own.DNS
UpdatedThe File Systems lesson now uses current examples of hidden config. `.eslintrc` is out, because ESLint v10 no longer supports it. The lesson also notes that `CLAUDE.md` and `eslint.config.js` are config files that aren't hidden, since their names don't start with a dot.File Systems
UpdatedThe GitHub Skills link in the Repositories lesson now goes straight to its new home on GitHub Learn, so you skip the old redirect page.Repositories
UpdatedThe revision history guide now mentions Claude Code's built-in checkpoints and the /rewind command. It covers what they restore, what they miss (shell commands, most subagent edits, your own edits outside Claude Code), and why git checkpoint commits are still your lasting safety net.Managing Revision History
UpdatedThe VECTOR.md lesson now explains that every Claude Code session starts with a fresh context window. `CLAUDE.md` and auto memory carry some things between sessions, but your project's purpose, users and decisions still need to be written down.What Is VECTOR.md?
UpdatedThe Setting Up a Project guide now mentions `/init`, which drafts a starting CLAUDE.md for a project that already has code. It also shows how to confirm your CLAUDE.md loaded: run `/context` and look for it under Memory files.Setting Up a Project
2026-09-28
NewDeployment00 OrientationUpdatedInvestiture: The Framework03 The PipelineNewWorking with Multiple AgentsApproach Guide
UpdatedThe Claude Code install steps now include the Windows PowerShell command, and they no longer say you need Node.js first. They also explain that Claude Code needs a paid Claude plan or an Anthropic Console account, because the free plan does not include it.Claude Code
UpdatedThe Deployment lesson now shows `localhost:5173` as the local address, the default for Vite, the tool the lesson uses to create its project. The address you see when you run the steps should now match the lesson.Deployment
UpdatedThe Deployment lesson now uses Netlify's current names: "Add new project", "Project configuration" and "Add a domain". It also shows the correct DNS records for a bare domain (an ALIAS or A record) and for a subdomain like www (a CNAME). It now says DNS changes can take up to 48 hours to take effect.Deployment
UpdatedThe Investiture lesson now covers v1.5. It has eight skills in two chains: the doctrine chain, plus a new audit chain (/invest-preflight, /invest-manifest, /invest-repo-audit, /invest-remediate, /invest-verify-remediation) that inventories and audits an existing codebase, plans fixes and verifies them.Investiture: The Framework
UpdatedThe multi-agent lesson now explains that recent versions of Claude Code can send short messages between your sessions on the same machine (cross-session messaging), and why the lesson still uses files and commits to pass work between agents.Multi-Agent SystemsThe Crew Model
UpdatedThe multiple-agents guide no longer uses a `--profile` flag, which Claude Code does not have. It now shows how to give your second agent its own folder with `git worktree add`, so each agent reads its own CLAUDE.md.Working with Multiple Agents
FixedThe Claude Code documentation and tutorials links on the Resources page now go straight to code.claude.com, where Anthropic hosts the Claude Code docs.
2026-09-27
NewGiving Effective InstructionsApproach Guide
UpdatedThe AI chat companion now runs on Claude Sonnet 5, the current Sonnet model. It still follows the same tutoring instructions.
UpdatedThe CLAUDE.md lesson now explains that Claude Code only reads VECTOR.md if your CLAUDE.md imports it with an @ reference. It also explains that Claude Code reads a repo's AGENTS.md when there is no CLAUDE.md.CLAUDE.md
FixedThe Sprint book link in the Ideation and Prototyping lessons now goes to its current home. We also removed two reading links that no longer work, from the Prototyping and Staged Prompts lessons and the resources page.IdeationPrototypingStaged Prompts
FixedThe links to Anthropic's prompt engineering guide and the Claude Code best practices page now point to their new homes on platform.claude.com and code.claude.com.Giving Effective InstructionsPrompting
2026-04-10
2026-03-03
2026-02-14
NewGit Basics00 OrientationNewSystems Thinking01 FoundationNewArchitecture01 FoundationNewNouns & Verbs01 FoundationNewPlanning01 FoundationNewData Modeling01 FoundationNewInformation Architecture01 FoundationNewYour First Session with Claude CodeApproach GuideNewWriting a PRDApproach GuideNewBuilding Use CasesApproach GuideNewCreating a Project PlanApproach GuideNewBuilding a Feature End-to-EndApproach GuideNewDebugging with AIApproach Guide