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Use when building the Unreal Engine project, after modifying C++ source files, or when build errors need diagnosis
Install with Codex or Claude Copy this prompt, paste it into Codex, Claude, or another assistant, and let it review the skill page and install it for you.
Based on SOC occupation classification
Use when inspecting skeletal animation assets or authoring sequence skeleton named notifies through UnrealCortex.
Use when setting up Cortex for a project, getting started, refreshing schema, or asking what to do next
Use when creating, modifying, reviewing, debugging, or reparenting Blueprints — structure, graphs, variables, functions, inheritance, best practices
Blueprint-to-C++ migration pipeline with conversational analysis, plan-driven execution, visual progress tracking, and hard gates. Supports --audit, --resume, and --fast (streamlined mode for simple migrations).
Use when the Unreal Editor needs to be started, checked, reconnected, or restarted
Use when placing, organizing, or reviewing actors in a level
| name | cortex-build |
| description | Use when building the Unreal Engine project, after modifying C++ source files, or when build errors need diagnosis |
Builds the UE project with proper configuration.
Read the effective Cortex config to get the engine path:
.cortex/config.yaml.cortex/config.local.yaml over it for per-machine overrides$UE_PATH only when project config does not provide engine.pathUse the shared loader when available:
python cortex-toolkit/lib/cortex_config.py --project-dir . --get engine.path
Find the .uproject file in the project root.
Execute the build command:
"$ENGINE_PATH/Engine/Binaries/DotNET/UnrealBuildTool/UnrealBuildTool.exe" \
<ProjectName>Editor Win64 Development \
-Project="<absolute path to .uproject>" \
-WaitMutex -FromMsBuild
Success: Report "Build succeeded" with any warnings.
Failure: Parse the build output:
error C or error :)DLL locked: If build fails with DLL lock error, suggest:
Intermediate/Build/BuildRules/*.dllIf UE Editor is running, it will hot-reload automatically. No action needed.