Your download should start on its own. If it doesn't, download moog-agent-policy-toolkit.zip.
Check it against its SHA-256 checksum, saved next to the zip:
shasum -a 256 -c moog-agent-policy-toolkit.zip.sha256
Then add the marketplace and install Policy Builder in Claude Code:
unzip moog-agent-policy-toolkit.zip
claude plugin marketplace add "$PWD/moog-agent-policy-toolkit"
claude plugin install moog-policy-builder@moog
Or add the marketplace from this site, which claude plugin marketplace update moog
then keeps current:
claude plugin marketplace add https://<this site>/marketplace.json
claude plugin install moog-policy-builder@moog
Or install it in Kiro as a power, then start kiro-cli chat --v3:
unzip moog-agent-policy-toolkit.zip
kiro-cli powers install "$PWD/moog-agent-policy-toolkit/plugins/moog-policy-builder"