Update the plugin

Check which Strata19 version you run, update it on Claude Code, Codex, Claude Desktop, or Antigravity, and roll back

Goal

Move an installed Strata19 plugin to the newest release and confirm the running session picked it up.

Hosts load a plugin from a version-keyed cache. Publishing new code under a version you already have installed ships nothing, so an update only exists when the version number is higher. Each release is tagged strata19--v<version> and lists its artifacts and hashes in latest.json.

Steps

See what you are running

Your host lists installed plugins and their versions (claude plugin list, codex plugin list). Compare that with the stable.version in latest.json. A session that was started before an update keeps running the old server until it is reloaded.

Update on your host

claude plugin marketplace update strata19
claude plugin update strata19@strata19

Then run /reload-plugins in each open session. To update automatically, open /plugin, choose Marketplaces, select strata19 and enable auto-update. It is off by default for third-party marketplaces, applies after a random delay of up to ten minutes, and running sessions still need /reload-plugins.

codex plugin marketplace upgrade strata19
codex plugin add strata19@strata19

Restart Codex afterwards. The command is upgrade, not update.

Download strata19.mcpb from the newest GitHub Release and open it. Extensions installed this way do not update themselves.

Re-run node scripts/strata19/host/install-antigravity-plugin.mjs and restart Antigravity. It has no --update flag yet.

Verify

Your host should list the new version, and a response that names your repository should come from a session started after the update. On Claude Code and Codex, compare the installed copy with the release:

ls ~/.claude/plugins/cache/strata19/strata19/
ls ~/.codex/plugins/cache/*/strata19/

If it doesn't work

The marketplace still shows the old version. Claude Code can keep a stale local clone of the marketplace. Remove it and add it again:

rm -rf ~/.claude/plugins/marketplaces/strata19
claude plugin marketplace add https://github.com/jordanallen87/praetor.git

The new version is installed but the session still reports the old one. The running server was started before the update. Run /reload-plugins (Claude Code) or restart the host (Codex, Antigravity).

You need to go back. A release can be rolled back to any earlier tagged version. Until the marketplace points at that version again, pin it by hand by reinstalling from the tag strata19--v<version>. A newer release can change the plugin's local data files, so the release notes say when a rollback also needs a data step.