Fullstack Dev Plugin

Guide full-stack application development from focused context, decision discovery, requirements, and planning through architecture, design patterns, data, APIs, NestJS and FastAPI services, source-verified implementation, Python and frontend testing, behavior-preserving refactoring, operations, migration, review, and launch.

Install

Add this repository as a Codex marketplace, then install the plugin:

codex plugin marketplace add dtgbao/agent-skills
codex plugin add fullstack-dev@bao-plugins

Start a new Codex task after installation so all bundled skills are available.

Lifecycle

Stage	Skill	Purpose
Route	`index`	Discover and sequence every applicable skill.
Context	`context-engineering`	Curate project rules and focused context for each task.
Sources	`source-driven-development`	Verify version-sensitive work against official sources.
Clarification	`grilling`	Stress-test ideas by resolving each unblocked decision frontier in rounds.
Definition	`spec-driven-development`	Define approved requirements, boundaries, and success criteria.
Planning	`planning-and-task-breakdown`	Create dependency-ordered, verifiable implementation tasks.
Architecture	`codebase-design`	Choose deep modules, small interfaces, seams, and adapters.
↳ Patterns	`design-pattern`	Apply GoF patterns to object-oriented TypeScript when warranted.
Database	`supabase-postgres-best-practices`	Apply specialized database guidance when its engine matches.
Interfaces	`api-and-interface-design`	Define service boundaries and typed API contracts.
Backend	`nestjs-best-practices`	Apply production-ready NestJS architecture and practices.
↳ FastAPI	`fastapi-best-practices`	Apply source-verified Python and FastAPI production practices.
Testing	`test-driven-development`	Drive every behavior change through a failing test.
↳ Python	`python-testing-best-practices`	Apply reliable Python, pytest, and FastAPI testing patterns.
↳ Vitest API	`vitest`	Look up current Vitest APIs, configuration, and CLI behavior.
↳ Practices	`vitest-best-practices`	Write reliable Vitest and component tests.
Refactoring	`refactoring`	Diagnose code smells and apply behavior-preserving techniques.
Frontend	`frontend-ui-engineering`	Build accessible, responsive interfaces against contracts.
↳ React	`react-best-practices`	Apply React architecture guidance within frontend work.
Automation	`ci-cd-and-automation`	Automate repository quality and deployment gates.
Launch	`shipping-and-launch`	Plan authorized rollout, verification, and recovery.
Versioning	`git-workflow-and-versioning`	Guide authorized Git, version, changelog, and release work.

Apply these skills wherever their concern appears:

security-and-hardening for trust boundaries, authentication, sensitive data, and external integrations.
performance-optimization for measurable performance requirements or regressions.
observability-and-instrumentation for logs, metrics, traces, and alerts.
documentation-and-adrs for decisions and public behavior.
debugging-and-error-recovery for failing tests, builds, and runtime behavior.
deprecation-and-migration for replacing or removing existing systems safely.
refactoring for diagnosing code smells and selecting named, behavior-preserving transformations.
code-simplification for focused, behavior-preserving clarity improvements; use it with refactoring when both concerns apply.
code-review-and-quality before merge or release.

Use the bundled database skill when it matches the project's engine. Otherwise, follow the repository's native database conventions and continue the lifecycle at backend contract design.