fusion/docs/contributing.md

Contributing

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Thanks for contributing to Fusion.

Development Setup

Prerequisites

• Node.js (current LTS recommended)
• pnpm (packageManager is pnpm)
• Git
• pi runtime/auth configured for AI features

Install dependencies

pnpm install

Build all packages

pnpm build

Workspace Package Overview

Package	Purpose
@fusion/core	Shared domain types, stores, persistence, and core utilities
@fusion/dashboard	Express API + React UI
@fusion/engine	Scheduling, triage, execution, merge orchestration
@fusion/tui	Ink-based terminal UI components
@gsxdsm/fusion	Published CLI + pi extension

Development Workflow

pnpm dev          # build + run CLI entrypoint in dev mode
pnpm dev:ui       # dashboard dev server only
pnpm lint         # lint all packages
pnpm typecheck    # workspace typechecks
pnpm test         # workspace test suite
pnpm build        # workspace builds

Quality Gate Checklist

Before submitting changes, verify:

• pnpm lint — lint passes with no errors
• pnpm test — all tests pass
• pnpm typecheck — type checking passes
• pnpm build — builds successfully

Testing Requirements

Use real test runs (not manual verification substitutes):

pnpm test
pnpm test:coverage
pnpm test:coverage:core
pnpm test:coverage:engine
pnpm test:coverage:cli
pnpm test:coverage:dashboard

Build Standalone Executables

Fusion supports standalone binary builds through Bun compile scripts in the CLI package.

pnpm build:exe      # build host-target executable
pnpm build:exe:all  # build multi-target executables

Release Process

Fusion uses Changesets + version PR workflow.

• See RELEASING.md for release flow details.
• For published package behavior changes, include a changeset.

Code Signing

Release binary signing setup is documented here:

• Code Signing Setup

Git / Commit Conventions

Use task-ID-scoped conventional commits:

• feat(FN-XXX): ...
• fix(FN-XXX): ...
• test(FN-XXX): ...
• docs(FN-XXX): ... (for documentation-only changes)

Project Memory

When enabled, agents can read/write durable project memory:

• .fusion/memory.md

Use it for reusable patterns, constraints, and pitfalls that should persist across tasks.

Background Memory Summarization

Fusion can automatically extract insights from working memory and prune transient content. Enable via insightExtractionEnabled setting:

• .fusion/memory.md — Working memory (automatically pruned to durable items)
• .fusion/memory-insights.md — Long-term distilled insights
• .fusion/memory-audit.md — Audit report after each extraction (includes pruning outcome)

See Settings Reference for configuration details.

SQLite Test Runner Pitfall

When running engine tests with Vitest and node:sqlite, ensure the engine Vitest config uses thread pool mode:

• ✅ pool: "threads"
• ❌ pool: "vmThreads"

node:sqlite fails under Vitest VM contexts; using threads avoids that failure mode.