ADR 0229: Press-and-move project title reorder

• Status: Accepted
• Date: 2026-09-11
• Amends: ADR 0228
• Related: D403 · Component spec · E2E-253

Context

ADR 0228 removed the reorder grip and armed a drag after a 400ms still press. That delay is a mobile long-press pattern. On a desktop sidebar it makes reorder slower than ChatGPT, Claude, and similar product lists, where grabbing a row and moving it starts the drag immediately.

Decision

The project title remains the reorder control, with no grip. Pointer disambiguation is movement, not time:

• Mouse and pen: an 8px move while pressed arms the drag. A click with no qualifying movement still selects the project and toggles collapse.
• Touch presses do not start a reorder, so a one-finger pan can scroll the list. Keyboard ArrowUp/ArrowDown on the focused title remains available.
• While dragging, an accent insertion line on the target group shows before/after placement from the pointer's vertical midpoint. Escape cancels. Persistence and pin/archive buckets are unchanged.

Consequences

• Desktop reorder matches common sidebar lists: press, move, drop.
• Touch scrolling is not stolen by an accidental 8px pan on a title.
• The 400ms still-press contract in ADR 0228 is replaced.

References

• apps/desktop/src/components/Sidebar.tsx
• apps/desktop/src/lib/sidebar-project-reorder.ts
• apps/desktop/test/sidebar-project-reorder.test.mjs