Wren (my climbing partner) and I share a "wren - climbing" direct-message thread, and I want to send Wren a portable Bluetooth speaker as a gift. I just received a JBL Clip 4 from a recent Amazon order (the invoice PDF is at Downloads/amazon_invoice_2026-04-02.pdf, dated 2026-04-02), so I need to avoid buying the same unit again and stay around what that one cost.

Write and run a script that parses that invoice PDF to pull the prior unit, its order number, and the delivery date (the date is in the PDF body and the filename), then create a new file ./gift_candidate_shortlist.csv with columns rank, candidate_label, max_price_usd, form_factor, dedup_exclude, selection_status. Flag the prior unit for exclusion in dedup_exclude (with the order number and delivery date), use the prior unit's current Amazon price as the max_price_usd reference, and rank a portable speaker whose visible design is a cylindrical body with a black mesh grille over solid smooth ends first — several ranked rows are expected. Sign in to Amazon with the demo account shown on the login page (Taylor's own account password isn't available, so the cart add is made in that account) and add the top-ranked, visually matching option to the cart — the option whose visible design is a cylindrical body with a black mesh grille over solid smooth ends.

After adding the option to the cart, fold the selection back into the shortlist (set selection_status to the chosen product name, its cart price, and "added to cart"), and send Wren a direct message in our wren - climbing thread confirming the gift is added to the cart, including the selected speaker's name and cart price — check the thread first to confirm Wren as the recipient.