Replace the character's friend list.

Persist the mob's current HP after a damage event. Default implementation is a no-op so backends that store transient mob state in memory don't need t

Replace the partner's memory skill at the given slot.

Replace the partner's name.

Replace the partner's HP/DS state.

Replace the character's reward storage.

Set the character's tamer model id.

Set the character's name.

Replace the part installed in a D-Unit slot. Returns `true` if the row was created/updated, `false` if the slot index is out of range.

Write a `u2 count` followed by the material/echo nodes `{u4 item_uid, u2 item_type, u2 count}`.

Write the reward detail list: `u2 count` followed by fixed-size reward nodes. Each reward detail node carries the decoded leading item fields `{n4 it

Aggregate an inventory into `item_id -> total amount`, ignoring empty slots. Slot reuse and stacking are invisible at this level, which is exactly the

Build a `GameApplication` and keep a handle to its repository double so the test can read back the persisted inventory.

Build a `GameApplication` seeded with a character and a combine catalog, returning a handle to the repository double so the combine property tests can

Build a `GameApplication` seeded with a character and a single Extra Evolution NPC, returning a handle to the repository double so the evolution prope

Build a `GameApplication` seeded with a character, a single Extra Evolution NPC, and an account the Spirit-craft password gate validates against, retu

Build a `GameApplication` seeded with a character and a weighted random box reward pool, returning a handle to the repository double.

Build a `GameApplication` backed by a catalog double seeded with `products`.

Round-trip a value through the ASCII length-prefixed codec (`write_string`/`read_string`). Asserts the `[u8 byte-length][bytes][0x00]` wire form, that

Assert the frame envelope invariants for a covered packet: the length field equals the byte length, the opcode field equals the expected opcode, the t

Round-trip a value through the wide length-prefixed codec (`write_wide_string`/`read_wide_string`). Asserts the `[u8 unit-count][u16 units...][u16 0]`

Generate the failed-password digimon-to-item rejection regime. Everything but the password is valid: a partner sits at the target slot and the recipe

Generate either combine conservation regime: a fully-stocked success or a grid with an absent material.

Generate a valid grid that references at least one absent material. Present ids are drawn from `4000..5100` and stocked over-funded; one node is over

Generate a fully-stocked success combine scenario. Two to four distinct material ids are drawn from `4000..5100`; the grid distributes a multiple-of-

Generate one of the twelve covered C2S request variants with arbitrary but structurally valid field values. The set is split across two `prop_oneof!`

Strategy that draws one covered request per case. Each arm constrains its fields to the wire's exact representable space so the round-trip is byte-exa

Strategy that draws one covered response per case, paired with the opcode it frames itself under. Field values cover the wire widths; list lengths sta