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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