What is think-first?
think-first is a Claude Code mod by shawnclybor that makes Claude run a sequential-thinking step before its first write in each request, and again before retrying a tool call that just failed. Uses the sequential-thinking server you already. It is listed under Interface and has no public popularity data yet.
| Type | Claude code mod |
|---|---|
| Author | shawnclybor |
| Repository | shawnclybor/think-first |
| Popularity | no public popularity data yet |
| Category | Interface |
| Security | Review before installing (64/100) |
| Rank | #4,585 of 5,272 Claude Code mods; #1,876 in Interface |
| License | MIT |
| Last commit | 2026-10-07 |
| Hooks | 2 events |
| Sees | every prompt, every tool call |
| Draws on | nothing |
Is think-first safe to install?
think-first scores 64/100 on the MCPMods security check: Review before installing. Things to review: writes files or config; reads environment variables; watches every prompt or event. It passed 5 of 8 checks.
Mod footprints come from claude plugin validate, which lists every event a mod hooks and every API call it makes without running it.
| Check | Result |
|---|---|
| No network access | Pass |
| Starts no processes | Pass |
| Writes files or config | Review |
| Reads environment variables | Review |
| Watches every prompt or event | Review |
| Doesn't drive Claude | Pass |
| Passes claude plugin validate | Pass |
| Has an open-source license | Pass |
API calls in its code
| Call | What it means |
|---|---|
$.env.get | reads env vars |
$.env.set | sets env vars |
How do I install think-first?
- Check your Claude Code version. Mods need Claude Code 2.1.287 or later and are on by default.
claude --version
- Read its footprint. This lists every event it hooks and every API call it makes, without running it.
git clone https://github.com/shawnclybor/think-first claude plugin validate ./think-first/.
- Install it. Run this in your terminal, then /reload-plugins in an open session.
git clone https://github.com/shawnclybor/think-first && claude --plugin-dir ./think-first/.
Or ask Claude to set it up
Paste this into Claude Code and it installs think-first for you:
Install the "think-first" Claude Code mod from https://github.com/shawnclybor/think-first. Run claude plugin validate on it first and show me what it can access before you enable it.