Add support for a URL query parameter that pre-applies a coupon at checkout, so clients click a link and the discount is already filled in — no code typed.
Use case: agencies running tier-based discounts (e.g., a "Circle members get 25% off" benefit on a recurring service) want to send members a direct link that applies the discount automatically. Today, clients have to copy/paste the coupon code at checkout, which adds friction and breaks the one-click expectation when the link is sent in a welcome email or member portal.
Suggested syntax: ?promo=CODE or ?coupon=CODE on the service URL. The checkout page reads the parameter, validates against active coupons (including service applicability, expiration, usage limits), applies the discount automatically, and shows the adjusted total.
Reference patterns from other platforms:
?prefilled_promo_code=CODE?discount=CODE?discount=CODE?coupon=CODECurrent workaround: create separate hidden service listings per tier (e.g., one public listing at full price, a hidden "Circle Diagnostic" listing at the discounted price, a hidden "Atelier Diagnostic" listing at $0). Works but duplicates listings that should share a single source of truth, and forces re-syncing description/intake-form changes across all copies.
Why this is more important than coupons-typed-at-checkout: for ongoing tier benefits where members earn the discount permanently, typing a code adds friction every time. A pre-applied URL is set-and-forget — the agency wires the URL once into their welcome email or member portal, and members click through with no input.