v0.29.1 — installs that actually install

A patch fix, no surface changes.

moshcode plugin install now refreshes the marketplace

plugin install ran claude plugin marketplace add before every install, specifically so a machine that added the marketplace before a plugin existed would not fail with "not found in any marketplace". It could never have worked: add is a no-op for a marketplace already on disk, so the install read a stale local copy and failed with exactly that error.

✘ Failed to install plugin "stocks@moshcode": Plugin "stocks" not found in
  marketplace "moshcode". Your local copy may be out of date…

This broke plugin install crypto in v0.27.0 and plugin install stocks in v0.29.0 — on every machine that had installed a plugin from this marketplace beforehand, which is all of them. The only machines it worked on were the ones that had never used the marketplace, and a fresh CI runner is always one of those, which is why nothing caught it.

marketplace update now runs between add and install. If you hit the failure on either of the last two releases, upgrade and re-run — no manual step needed:

moshcode upgrade
moshcode plugin install stocks

Doing it by hand instead? The update line is the one to not skip:

claude plugin marketplace add moshcoder/moshcode
claude plugin marketplace update moshcode   # `add` is a no-op if you already have it
claude plugin install stocks@moshcode

All three READMEs carry that line now, with a sentence on why it is there.