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Ln 781 Build Verifier

ln-781-build-verifier

Builds all detected projects and verifies successful compilation

SKILL.md

Full skill instructions

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

ScenarioUse This Skill
Called by ln-780 orchestratorYes
Standalone build verificationYes
CI/​CD pipeline build stepYes
Test execution neededNo, use ln-782

Workflow

Step 1: Detect Project Types

Scan project root for type markers.

Marker FileProject TypeBuild System
package.jsonNode.js/​Frontendnpm/​yarn/​pnpm
*.csproj.NETdotnet
setup.py / pyproject.tomlPythonpip/​poetry
go.modGogo build
Cargo.tomlRustcargo
pom.xmlJava/​Mavenmvn
build.gradleJava/​Gradlegradle

Step 2: Restore Dependencies

For each detected project, restore dependencies before building.

Project TypeDependency Restoration
Node.jsInstall packages from lock file
.NETRestore NuGet packages
PythonInstall from requirements or pyproject
GoDownload modules
RustFetch crates

Step 3: Build Projects

Execute build for each project type in Release/​Production mode.

Project TypeBuild ModeExpected Outcome
Node.jsProductionBundled assets in dist/ or build/
.NETReleaseCompiled DLLs in bin/​Release/
PythonEditable installPackage installed in environment
GoProductionCompiled binary
RustReleaseOptimized binary in target/​release/

Step 4: Verify Build Artifacts

Confirm build outputs exist.

Project TypeArtifact Check
Node.jsdist/ or build/ directory exists, contains files
.NETDLL files in bin/​Release/​{framework}/
PythonPackage importable
GoBinary executable exists
RustBinary in target/​release/

Step 5: Report Results

Return structured results to orchestrator.

Result Structure:

FieldDescription
projectNameName of the project
projectTypeDetected type (nodejs, dotnet, python, etc.)
statussuccess / failed
durationBuild time in seconds
outputPathPath to build artifacts
errorMessageError details if failed

Error Handling

Error TypeRecovery Action
Dependency restore failedCheck network, verify lock file integrity
Compilation errorsLog full error output, report as failed
Missing build toolReport required tool installation
TimeoutReport timeout, suggest increasing limit

Critical Rules

  1. Always restore dependencies first - builds may fail without fresh dependencies
  2. Use production/​release mode - development builds may hide issues
  3. Verify artifacts exist - successful exit code is not sufficient
  4. 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

Version: 2.0.0 Last Updated: 2026-01-10

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