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handler image

List the images agents run in, and rebuild one.

When to use it

  • A new Claude Code or Codex release: handler image rebuild claude-code.
  • System updates in every image: handler image rebuild toolbox.
  • After editing an addon or the toolbox's files.
  • To see which version of a harness your agents get, or whether an image is not built.

Usage

handler image list
handler image rebuild NAME | addon:NAME | toolbox | network-filter

The images are built on this machine: the toolbox (the base every agent gets, with its tools), one image per harness and per addon on top of it, and the network filter (the proxy that checks where agents connect and adds your secrets to their requests).

Subcommands

Subcommand
list every image: name, image reference, the harness's version (or not built), when it was built
rebuild NAME one harness's image (claude-code, codex, vibe, pi), with the harness's latest release
rebuild addon:NAME an addon's image (also its first build)
rebuild toolbox the toolbox (system packages, your ~/.config/handler-ai/toolbox/), then every harness and addon image on top of it: all switch, or none
rebuild network-filter the network filter; the daemon builds it itself when it is missing

A rebuild checks the new image, then switches agents to it. The log streams to the terminal; Ctrl-C cancels and nothing switches. Running sessions keep the image they started on.

See also

addon · setup