Worked examples of onboarding to a codebase: the first files to read, main systems, and key terms for each repo. See how Repo Mastery turns any repository into a fast onboarding path.
A payments API that authorizes charges, records them in a double-entry ledger, batches merchant payouts, and reconciles card-processor events through idempotent webhooks.
src/charges/chargeService.ts src/ledger/ledger.ts src/webhooks/handler.tsA React dashboard front end built on a shared design system, with feature-flagged rollout so views and code paths can ship safely behind runtime toggles.
src/design-system/index.ts src/flags/FlagProvider.tsx src/design-system/Table.tsxA Go microservice that accepts orders over gRPC and REST, persists them to Postgres, emits domain events to a message queue, and exposes health and metrics for the platform.
cmd/server/main.go internal/orders/service.go internal/transport/grpc.goA Python ETL pipeline that extracts events from source systems, transforms them into a star schema, and loads them into the warehouse on a scheduled Airflow DAG.
dags/analytics_dag.py pipeline/extract.py pipeline/transform.pyA Rust command-line tool that parses arguments, runs subcommands concurrently with async tasks, and prints structured output, built for speed and reliability.
src/main.rs src/cli.rs src/commands/mod.rsA Next.js SaaS application with authentication, a Postgres-backed data layer, Stripe billing, and server components rendering the dashboard.
app/layout.tsx app/(dashboard)/page.tsx lib/auth.ts