Create Print-Ready PSD Cover Template (Front/Spine/Back)

Summary
We do NOT need cover design. We will create the design ourselves.

We only need a correct, print-ready PSD template for a children’s book cover spread, with very clear guides/grids for:
Front cover
Spine (with left & right edges clearly marked)
Back cover
Trim line / safe area / bleed clearly labeled

Book specs:
Interior trim size: 210 × 260 mm
Interior with bleed: 213 × 266 mm (3 mm bleed each side)

We need full cover spread size template to send to the factory printing company.

Spine width (current spec from printer): 2.55 mm (needs to be set accurately in the template). This I wrong that we got from them.

Trim lines: blue / Bleed: red / Spine: green (centerline) (from printer template)

Template requirements (must-have):
PSD at 300 DPI, CMYK, correct overall dimensions.

Guides/layers clearly named: BLEED / TRIM / SAFE / SPINE CENTER / SPINE LEFT EDGE / SPINE RIGHT EDGE.

Spine area must be 100% unambiguous: show the exact spine width and boundaries so we know where text can go.

Provide a safe text area on the spine (recommended margin inside spine edges).

Deliver PSD

Deliverables:
1× PSD template (layered, organized, labeled)

Please include in your proposal:
Confirmation you have experience with book cover prepress/templates (bleed/trim/spine)
Which Adobe software you’ll use and how you ensure accuracy

Also that you read the whole description and confirm you understand everything.