Paths: File paths (
shared/,references/,../ln-*) are relative to skills repo root. If not found at CWD, locate this SKILL.md directory and go up one level for repo root.
ln-781-build-verifier
Type: L3 Worker Category: 7XX Project Bootstrap Parent: ln-780-bootstrap-verifier
Purpose
Detects project types, restores dependencies, executes builds, and verifies successful compilation.
Scope:
- Auto-detect project types from file markers
- Restore dependencies using appropriate package manager
- Execute build commands for each project
- Verify build artifacts exist
Out of Scope:
- Running tests (handled by ln-782)
- Container operations (handled by ln-783)
- Workflow orchestration (handled by ln-780)
When to Use
| Scenario | Use This Skill |
|---|---|
| Called by ln-780 orchestrator | Yes |
| Standalone build verification | Yes |
| CI/CD pipeline build step | Yes |
| Test execution needed | No, use ln-782 |
Workflow
Step 1: Detect Project Types
Scan project root for type markers.
| Marker File | Project Type | Build System |
|---|---|---|
| package.json | Node.js/Frontend | npm/yarn/pnpm |
| *.csproj | .NET | dotnet |
| setup.py / pyproject.toml | Python | pip/poetry |
| go.mod | Go | go build |
| Cargo.toml | Rust | cargo |
| pom.xml | Java/Maven | mvn |
| build.gradle | Java/Gradle | gradle |
Step 2: Restore Dependencies
For each detected project, restore dependencies before building.
| Project Type | Dependency Restoration |
|---|---|
| Node.js | Install packages from lock file |
| .NET | Restore NuGet packages |
| Python | Install from requirements or pyproject |
| Go | Download modules |
| Rust | Fetch crates |
Step 3: Build Projects
Execute build for each project type in Release/Production mode.
| Project Type | Build Mode | Expected Outcome |
|---|---|---|
| Node.js | Production | Bundled assets in dist/ or build/ |
| .NET | Release | Compiled DLLs in bin/Release/ |
| Python | Editable install | Package installed in environment |
| Go | Production | Compiled binary |
| Rust | Release | Optimized binary in target/release/ |
Step 4: Verify Build Artifacts
Confirm build outputs exist.
| Project Type | Artifact Check |
|---|---|
| Node.js | dist/ or build/ directory exists, contains files |
| .NET | DLL files in bin/Release/{framework}/ |
| Python | Package importable |
| Go | Binary executable exists |
| Rust | Binary in target/release/ |
Step 5: Report Results
Return structured results to orchestrator.
Result Structure:
| Field | Description |
|---|---|
| projectName | Name of the project |
| projectType | Detected type (nodejs, dotnet, python, etc.) |
| status | success / failed |
| duration | Build time in seconds |
| outputPath | Path to build artifacts |
| errorMessage | Error details if failed |
Error Handling
| Error Type | Recovery Action |
|---|---|
| Dependency restore failed | Check network, verify lock file integrity |
| Compilation errors | Log full error output, report as failed |
| Missing build tool | Report required tool installation |
| Timeout | Report timeout, suggest increasing limit |
Critical Rules
- Always restore dependencies first - builds may fail without fresh dependencies
- Use production/release mode - development builds may hide issues
- Verify artifacts exist - successful exit code is not sufficient
- Report all projects - include both successful and failed builds
Definition of Done
- All project types detected
- Dependencies restored for each project
- Build executed for each project
- Artifacts verified to exist
- Results returned to orchestrator
Reference Files
- Parent:
../ln-780-bootstrap-verifier/SKILL.md
Version: 2.0.0 Last Updated: 2026-01-10