Skill

bpx-prop

Manipulates properties in Unreal Engine .uasset exports via BPX prop CLI: lists decoded props with warnings, sets/adds/removes values using JSON paths, with dry-run and backup options.

Bash

cli-tools

npx claudepluginhub wilddogjp/openbpx

Tool Access

This skill uses the workspace's default tool permissions.

Preview

> **PREREQUISITE:** Read [bpx-shared](../bpx-shared/SKILL.md).

SKILL.md

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bpx-export

Inspects and updates export headers in .uasset files via BPX CLI commands: list by class/object, view details, set fields with dry-run and backup.

openbpx

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Last CommitMar 8, 2026

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prop

PREREQUISITE: Read bpx-shared.

Usage

bpx prop list <file.uasset> --export <n> bpx prop set <file.uasset> --export <n> --path <dot.path> --value '<json>' [--dry-run] [--backup] bpx prop add <file.uasset> --export <n> --spec '<json>' [--dry-run] [--backup] bpx prop remove <file.uasset> --export <n> --path <dot.path> [--dry-run] [--backup]

Behavior

list: decodes properties for one export and includes warnings.

set: updates an existing property value at --path.

add: appends a new top-level property from --spec JSON.

remove: removes a property at --path.

Write subcommands report old/new values, size deltas, and changed-byte status.

[!CAUTION] This command includes write-capable operations. Confirm intent and run --dry-run first.

Command Matrix

Command

Use when

Notable defaults

list

decodes properties for one export and includes warnings.

Read-only path; safe for discovery.

set

updates an existing property value at --path.

Run --dry-run first and use --backup for real writes.

add

appends a new top-level property from --spec JSON.

Run --dry-run first and use --backup for real writes.

remove

removes a property at --path.

Run --dry-run first and use --backup for real writes.

Code-Aligned Caveats

Write paths mutate one export only; invalid dot paths fail explicitly.

Prefer prop list immediately before prop set/add/remove to avoid stale assumptions.

High-Signal Examples

bpx prop list ./Sample.uasset --export 1 bpx prop set ./Sample.uasset --export 1 --path MyProperty --value '{"value":1}' [--dry-run] [--backup] bpx prop add ./Sample.uasset --export 1 --spec '{"value":1}' [--dry-run] [--backup] bpx prop remove ./Sample.uasset --export 1 --path MyProperty [--dry-run] [--backup]

prop

PREREQUISITE: Read bpx-shared.

Usage

bpx prop list <file.uasset> --export <n>
bpx prop set <file.uasset> --export <n> --path <dot.path> --value '<json>' [--dry-run] [--backup]
bpx prop add <file.uasset> --export <n> --spec '<json>' [--dry-run] [--backup]
bpx prop remove <file.uasset> --export <n> --path <dot.path> [--dry-run] [--backup]

Behavior

list: decodes properties for one export and includes warnings.
set: updates an existing property value at --path.
add: appends a new top-level property from --spec JSON.
remove: removes a property at --path.
Write subcommands report old/new values, size deltas, and changed-byte status.

[!CAUTION] This command includes write-capable operations. Confirm intent and run --dry-run first.

Command Matrix

Command	Use when	Notable defaults
`list`	decodes properties for one export and includes warnings.	Read-only path; safe for discovery.
`set`	updates an existing property value at --path.	Run `--dry-run` first and use `--backup` for real writes.
`add`	appends a new top-level property from --spec JSON.	Run `--dry-run` first and use `--backup` for real writes.
`remove`	removes a property at --path.	Run `--dry-run` first and use `--backup` for real writes.

Code-Aligned Caveats

Write paths mutate one export only; invalid dot paths fail explicitly.
Prefer prop list immediately before prop set/add/remove to avoid stale assumptions.

High-Signal Examples

bpx prop list ./Sample.uasset --export 1
bpx prop set ./Sample.uasset --export 1 --path MyProperty --value '{"value":1}' [--dry-run] [--backup]
bpx prop add ./Sample.uasset --export 1 --spec '{"value":1}' [--dry-run] [--backup]
bpx prop remove ./Sample.uasset --export 1 --path MyProperty [--dry-run] [--backup]