trackline in Claude Code
trackline runs as a Claude Code hook: it sees every action before it runs, and can stop one and tell the agent why.
| Can stop an action before it happens | yes |
| Tells the agent why | yes |
| Knows what you asked | read from the session transcript |
| Established by | live sessions; the agent corrected itself 11 times out of 11 when blocked |
Set it up
npm install -g trackline
trackline init
trackline doctor --host claudeOr paste the prompt from the install section into your agent. The full steps are in the guide.
Where it sees less
- Ask mode cannot prompt you directly: the agent is stopped and told to ask you.
Named plainly, because a tool that looks complete stops getting better. trackline doctor --host claude prints this list on your own machine.