Substrate Retainer Frame V1

implemented unverified

Vertical Farm Pack v1: the Snap Retainer Frame — a flat ring plate that clicks onto the coco cassette and holds the mat down LIGHTLY (retention, not compression: coco breathes, roots pass the opening). Four cantilever hooks (two per +-X side) flip down into the cassette's snap windows; the insertion strain and lip engagement are verified by the snap joint in the assembled pose, not hoped for. Everything is open geometry — no pocket a brush cannot reach, nothing that traps water. Removes by hand: flex two hooks, lift.

Declaration example

A minimal product declaration for this archetype — exposed parameters at their defaults. Validate and build it with forge validate / forge build.

schema: product/v1
id: my_substrate_retainer_frame
archetype: substrate_retainer_frame_v1@1

params:
  cassette_l: 220mm
  band_w: 10mm

Parameters

parameter	type	default	range	role
`cassette_l`cassette envelope the frame rides — shared with the cassette	`length`	`220mm`	`180mm … 236mm`	assembly	exposed
`cassette_wall`cassette wall thickness — positions the hooks inside it	`length`	`2.4mm`	`2mm … 3.2mm`	assembly
`frame_t`	`length`	`3mm`	`2.4mm … 4mm`	structural
`band_w`ring band width pressing the substrate rim	`length`	`10mm`	`8mm … 16mm`	functional	exposed
`corner_r`	`length`	`3mm`	`2mm … 6mm`	aesthetic
`beam_t`hook beam thickness — thinner flexes easier	`length`	`1.6mm`	`1.2mm … 2.2mm`	structural
`hook_w`	`length`	`8mm`	`6mm … 12mm`	structural
`hook_len`cantilever length — longer means lower insertion strain	`length`	`9mm`	`7mm … 14mm`	structural
`lip_d`lip undercut depth into the snap window	`length`	`1.4mm`	`1mm … 2mm`	assembly
`lip_h`	`length`	`3mm`	`2mm … 4mm`	assembly
`sy`Y spacing between the two hooks on each side	`length`	`120mm`	`60mm … 200mm`	assembly