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Run local builds with proper environment setup. Use when building code locally to verify changes before pushing.

Install Skill

1Download skill
2Enable skills in Claude

Open claude.ai/settings/capabilities and find the "Skills" section

3Upload to Claude

Click "Upload skill" and select the downloaded ZIP file

Note: Please verify skill by going through its instructions before using it.

SKILL.md

name build-run-local
description Run local builds with proper environment setup. Use when building code locally to verify changes before pushing.
category ci
mcp_fallback none

Build and Run Local

Execute local builds with environment setup matching CI pipeline.

When to Use

  • Building code locally before pushing
  • Testing individual components locally
  • Verifying changes work before creating PR
  • Running tests in local environment
  • Debugging build issues in isolation

Quick Reference

# Activate environment
eval "$(pixi shell-hook)"
pixi run mojo --version

# Build project
pixi run mojo build -I . shared/core/extensor.mojo

# Run tests
pixi run mojo test -I . tests/shared/core/

# Run specific test
pixi run mojo test -I . tests/shared/core/test_extensor.mojo

# Format code
pixi run mojo format .

Workflow

  1. Activate environment: Use pixi to setup environment
  2. Verify environment: Check mojo version and dependencies
  3. Build locally: Run mojo build with proper flags
  4. Run tests: Execute test suite locally
  5. Check warnings: Verify zero-warnings policy compliance
  6. Run pre-commit: Validate formatting and linting
  7. Commit changes: Only after local verification passes

Build Configuration

Environment Setup:

  • pixi shell-hook activates the pixi environment
  • Sets MOJO_PATH and compiler flags
  • Matches CI environment configuration

Build Flags:

  • -I . includes current directory in path
  • -O enables optimizations for release builds
  • --no-warn-unused suppresses specific warnings (use sparingly)

Test Flags:

  • -I . for module resolution
  • -v for verbose output
  • -k "pattern" to run specific tests

Output Format

Report build results with:

  1. Status - Success or failure
  2. Warnings - Any compiler warnings found (must be zero)
  3. Test Results - Passed/failed counts
  4. Build Time - Performance metrics
  5. Issues - Any errors encountered

Error Handling

Problem Solution
Environment not found Run pixi shell-hook to activate
Module not found Verify -I . flag and correct paths
Permission denied Check file permissions and ownership
Out of memory Reduce parallel jobs or simplify test
Timeout Check for infinite loops or long operations

References

  • See pixi.toml for available tasks and configuration
  • See CLAUDE.md for zero-warnings policy
  • See mojo-test-runner skill for advanced testing