Guards

Catches React hook mistakes as Claude writes them: missing effect deps, setState in render, conditional hooks.

Warns when public APIs, CLI flags or env vars change but the docs do not.

Gives Claude a recall tool to search your saved notes, decisions and journal.

/recent lists the files read and edited in this session, newest first.

Masks secrets and personal data in tool results before the model ever reads them.

Remembers which tests passed at the start of the session and warns if any of them now fail.

Adds a dedicated code-reviewer subagent and a /review command.

Blocks catastrophic shell commands like rm -rf /, mkfs, dd to disks and chmod -R 777.

A pane of your local database's tables and columns, ready to hand to Claude as context.

After Prisma or Drizzle schema edits, regenerates the client and warns when a migration is missing.

/scope locks Claude to the files you name; edits outside the scope are blocked.

After UI edits, takes a Playwright screenshot of the page and shows it to Claude.

Blocks edits and writes that would commit API keys, tokens or private keys.

Blocks database seed, reset and drop commands unless DATABASE_URL points at your own machine.

At the end of each editing turn, has the model double-check it actually did what you asked.

/replay steps through the session — prompts, tool calls, edits — in a pane, like a video timeline.

/session-stats shows a dashboard of turns, tools, tokens, cost, duration and files.

Coordinates sessions working on the same repo: file leases against conflicts, overlap warnings and hand-offs.

Tracks which languages and tools you've worked with each week.

Posts progress and reports to Slack and takes questions and commands from a channel, through the mods-hub channel system.

Points out your slowest tests after each test run.

Routes every subagent to the right model for the task's difficulty, runs independent work in parallel and starts workflows when a job needs one.

Sound packs for Claude Code events: minimal, retro or nature.

Flags UPDATE and DELETE without WHERE in .sql files and in queries inside your code.