Skills & agents for the whole software lifecycle

A vendor-neutral, open-source developer plugin for Claude Code, GitHub Copilot, and Codex — requirements, architecture, design, implementation, review, testing, accessibility, debugging, and bounded autonomous repair.

npm versionCILicense MITClaude CodeGitHub CopilotPlaywright
Get startedSee the architecture
$ npm install developer-assistant-skills
34
Skills
20
Agents
10
Lifecycle groups
3
Runtimes

Features

Closed-loop by design: An EASE-MAS backbone links requirement → PRD → architecture → code → test → failure → root-cause → repair, with a supervisor orchestrating the DAG.
Independent critics: 15 specialist review agents (security, performance, a11y, tests, …) audit diffs read-only; a deliberate step turns findings into a verdict.
Bounded, safe autonomy: Repair is capped by max_repair_attempts, guarded by a regression gate and an independent repair-validator. Merge stays human-owned.
CLI-first tooling: Skills prefer real tools — gh, az, npx playwright, npx axe — falling back to MCP servers when a CLI is unavailable.
Accessibility built in: A full WCAG 2.1/2.2 AA lifecycle: scan, deep review, fix, verify, and generate Playwright + axe regression tests.
One config, three runtimes: A single config.json plus prose companions drives Claude Code, Copilot, and Codex through thin generated adapters.

Explore

Layered architecture: runtimes call thin adapters that resolve to the .developer canonical library, which drives CLI-first tooling.
Runtimes → thin adapters → the .developer/ canonical library → CLI-first, MCP-fallback tooling.