H2cv — Development skill for Claude Code

h2cv (herdr sends to claude verifiably)

A command-line tool that lets Claude Code start Claude Code sessions and give them instructions.

It drives herdr underneath, and closes, in deterministic code, the problems you are bound to hit when you work the claude input box through it.

Why

herdr ships a skill file for AI agents, but a skill file on its own will not let one claude give instructions to another claude. Your agent may well get a message delivered on the fourth attempt — by which point its context is packed with pane ids and screen dumps, and it has lost the thread of whatever it was working on in the first place. The claude input box is a more complicated place than it looks. A short list of what is waiting there:

The completion menu eats your Enter

Claude Code A sends the `/review` skill to Claude Code B with `pane run`. B does not necessarily start working. A wonders why nothing is happening and goes back to look at the pane — again, and again. The Enter never reached the prompt: the completion menu opened on the leading `/` and swallowed it, and the body is still sitting in the input box. Getting out of this takes a procedure rather than a retry, and the obvious move — send the whole thing again — is the wrong one.

`idle` lies for about a second

Right after startup, herdr reports the agent as `idle`. Trust that, fire `agent send` immediately, and the instruction vanishes without ever running: the TUI is still initializing, and everything typed into that window is discarded. The status is not so much wrong as answering a different question than the one you asked, which is why "check the status, then send" is itself the trap.

"It didn't arrive" has three different endings

Nothing arrived, the body arrived without a submit, or the submit landed late. The agent believes it is looking at one condition and re-fires.