Coco Cassette V1

implemented unverified

Vertical Farm Pack v1: the Coco Cassette — the first implementation of the Cassette Interface Standard. A removable tray that drops into the water rail seat from above and lifts out by hand: flat ORTHOGONAL mesh floor (holds coco, aerates roots, directs no flow), one localized contact window reaching 1-2 mm into the channel's upper zone so the substrate touches PULSE water only and drained water never, snap windows through the walls for the retainer frame (pierced = brushable), finger notches in the rim. The cassette is the agrotech adapter, the rail is the water infrastructure: future sprout_mesh / rockwool_cube / netpot cassettes publish the same cassette_*/window_* frame keys and mate with the same rail untouched. Never a second water tray: the floor pierces through everywhere, nothing under the coco can pool.

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_coco_cassette
archetype: coco_cassette_v1@1

params:
  cassette_l: 177mm
  cassette_w: 177mm
  cassette_h: 26mm
  mesh_cell: 8mm
  window_w: 12mm
  window_drop: 1.5mm

Parameters

parameter	type	default	range	role
`cassette_l`outer envelope X — shared with the rail seat	`length`	`177mm`	`160mm … 236mm`	assembly	exposed
`cassette_w`outer envelope Y — shared with the rail seat	`length`	`177mm`	`160mm … 236mm`	assembly	exposed
`cassette_h`tray height — the substrate depth budget	`length`	`26mm`	`18mm … 40mm`	functional	exposed
`wall`shell wall — lightweight default (VF correction): the mesh floor already dominates stiffness	`length`	`2.2mm`	`2mm … 3.2mm`	structural
`floor_t`	`length`	`2mm`	`1.6mm … 3mm`	structural
`corner_r`	`length`	`3mm`	`2mm … 6mm`	aesthetic
`mesh_cell`square mesh opening — holds coco, passes water and air. Default 8: coarse enough that the holey floor tessellates into a clean manifold STL (a fine 4-6mm mesh packs 600+ openings into one planar face and out-runs OCC BRepMesh — manufacturing.mesh_manifold catches it)	`length`	`8mm`	`4mm … 10mm`	functional	exposed
`mesh_rib`web between mesh cells	`length`	`1.5mm`	`1.2mm … 2mm`	manufacturing
`mesh_margin`solid rim inside the walls before the mesh starts	`length`	`6mm`	`4mm … 12mm`	structural
`window_w`contact window width — must drop INSIDE the rail channel (verified in the assembled pose); contact area scales with window_l	`length`	`12mm`	`8mm … 40mm`	functional	exposed
`window_l`contact window length along the flow axis	`length`	`60mm`	`40mm … 120mm`	functional
`window_drop`how deep the window reaches into the channel's upper zone	`length`	`1.5mm`	`1mm … 2mm`	functional	exposed
`snap_w`	`length`	`10mm`	`8mm … 14mm`	assembly
`snap_h`	`length`	`4mm`	`3.5mm … 6mm`	assembly
`snap_top_offset`window top below the rim — positions the frame hook lips	`length`	`5.5mm`	`4mm … 12mm`	assembly
`snap_offset`Y offset of each snap window pair from the center	`length`	`60mm`	`30mm … 100mm`	assembly
`notch_w`	`length`	`18mm`	`16mm … 30mm`	functional
`notch_d`	`length`	`8mm`	`6mm … 14mm`	functional

Regions

contact_window transient water path
mesh_canvas substrate support mesh
floor aesthetic lightening
tray mounting surface

Contract

Guarantees

must-have features and invariants — verified on every build

substrate_mesh_floor
pulse_contact_window
tool_free_removal
cleanable_snap_interface
mesh_cell >= 4 and mesh_cell <= 10
mesh_rib >= 1.2
window_drop >= 1.0 and window_drop <= 2.0

Will refuse

explicit prohibitions — the engine refuses to build these

permanent_substrate_flooding
secondary_water_channel
closed_water_reservoir
uncleanable_snap_cavity

Not claimed

what passing validation does not mean

Provided “as is” under Apache-2.0 — no warranty of fitness for a particular purpose.

Built from operations

substrate_tray_body contact_window mesh_floor snap_window_pair snap_window_pair lift_tabs

Subscribed validators (19)

interface.frame_exists interface.frame_orthonormal interface.normal_points_outward interface.up_consistent form.shell_walls_ok form.mesh_floor_orthogonal_ok form.cassette_no_reservoir form.min_ligament_ok form.no_secondary_water_channel form.no_standing_water_ir form.contact_window_geometry_ok form.snap_pockets_cleanable form.lift_access_ok form.substrate_retained_under_mount form.cuts_respect_keepouts topology.cutout_present topology.single_connected_solid topology.contact_window_present topology.hex_field_present

Source: packs/artifact-forge-vf/data/archetypes/coco_cassette_v1.yaml · forge @ 370e624 · pack: artifact-forge-vf