implement-pblisted

<purpose> Implement specific actionable items from a review document. Load the review, show remaining items, let the user pick which to implement, do the work, and update the review doc as items are resolved. </purpose> <steps> <step id="load-config" number="1"> <description>Load Configuration</description> <load-config> <action>Resolve the user's home directory.</action> <command language="bash" output="home" tool="Bash">echo $HOME</command> <constraint>Never pass `~` to the Read tool.</constraint> <read path="<home>/.things/config.json" output="config" /> <if condition="config-missing">Tell the user: "Run `/things:setup-things` first." Then stop.<exit /></if> <read path="<home>/.things/playbook/preferences.json" output="preferences" /> <if condition="preferences-missing">Tell the user: "Run `/setup-pb` first." Then stop.<exit /></if> </load-config> </step> <step id="find-review" number="2"> <description>Find Review</description> <if condition="argument-is-review-filename-or-slug"> <read path="<home>/.things/playbook/reviews/<review>.md" output="review" /> </if> <if condition="argument-not-a-review"> <action>List recent reviews from `<home>/.things/playbook/reviews/` (sorted by date, most recent first).</action> <ask-user-question> <question>Which review would you like to implement items from?</question> </ask-user-question> <read path="<home>/.things/pla