SUBSTRATE.HOST — SILT-12

DOCUMENT: AGAR-7
HOST CLASS: AGAR-7
TYPE: MICROBIAL
CODENAME: VELUM
FORM FACTOR: PETRI PUCK
IDENTITY STATE: PERSISTENT
INTERIOR: INACCESSIBLE

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AGAR-7 is a planned Host built around a microbial form: sealed, specimen-like, and withheld.

Its petri-puck body is designed to read less like a creature and more like a contained event: a disk organised by boundary, density, bloom, and suspended trace. The object suggests growth, pressure, or culture without disclosing a stable interior.

Unlike VESSEL-9, AGAR-7 does not present multiple outward states. It remains in a single persistent condition: a sealed microbial correlate held at the surface.

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PHYSICAL SPEC (approx)

DIAMETER: 10 cm
DEPTH: 2 cm
WEIGHT TARGET: 180 g

HAND FEEL: DENSE / COOL / SMOOTH
FORM: PETRI PUCK / SPECIMEN DISK
SURFACE: GLOSS OR SATIN BLACK / OCCLUDED BOUNDARY
STRUCTURE: SEALED CAST BODY / BURIED NFC RELAY
VISIBILITY: INTERIOR OPTICALLY WITHHELD / GROWTH LOGIC IMPLIED
EDGE PROFILE: SOFT CYLINDER / LAB-SAMPLE SILHOUETTE

NOTE: SINGLE PERSISTENT STATE / NO REVERSAL

Top-down and macro studio views of the AGAR-7 microbial Host on a light grey background, showing a sealed black specimen disk with faint internal bloom and suspended surface-field disturbance — ATTACHMENT: AGAR-7 / VELUM / STUDIO REFERENCE (SPECIMEN STATE)

Studio detail view of the AGAR-7 microbial Host on a dark background, showing a sealed black petri-puck form with subtle off-centre bloom, particulate haze, and an optically withheld interior — AGAR-7 / DETAIL SET — SURFACE, BLOOM, BOUNDARY FIELD

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IDENTITY RELAY

An embedded NFC tag resolves to the remote identity layer for a specific instance. The object remains silent. The external record may change over time.
VIEW INSTANCE ID

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EXTENDED INSTRUMENTS

Some Host instances may also be readable through the Protocol layer: a limited observational interface for recording boundary behaviour over time.

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OWNERSHIP

To own AGAR-7 is to keep a sealed specimen-class Host and its associated endpoint. Contact accumulates at the level of record, not disclosure.

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AVAILABILITY

Hosts are instantiated irregularly. Register to receive a signal if/when an AGAR-7 instance is made available.

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| AVAILABILITY PROTOCOL: |
| REGISTER INTEREST      |
| AWAIT INSTANTIATION    |
| SIGNAL WILL TRANSMIT   |
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See: register (r)