Spec Kit 0.4.4: Copilot Integration & Agent Fixes

TL;DR

• Copilot integration proof of concept with shared template primitives
• Integration foundation with base classes, manifest system, and registry
• 7 new extensions added to community catalog (MAQA suite, superpowers bridge, product-forge, spec-kit-onboard, plan-review-gate)
• Fixes for Claude Code CLI detection, PowerShell agent support, and extension command shadowing

New

• Copilot integration (Stage 2) — proof of concept with shared template primitives for agent interoperability
• Integration foundation (Stage 1) — base classes, manifest system, and registry for multi-agent support
• MAQA extension suite — 7 new extensions added to community catalog
• Superpowers bridge extension — new community extension for enhanced capabilities
• Product-forge extension — new community extension added
• Spec-kit-onboard extension — new community extension for onboarding workflows
• Plan-review-gate extension — new community extension for review workflows
• --allow-existing-branch flag — create-new-feature script now supports existing branches

Fixed

• Claude Code CLI detection — fixed detection for npm-local installs
• Copilot instructions path — corrected path for copilot-instructions.md in scripts
• Extension command shadowing — prevented extension commands from shadowing built-in commands
• PowerShell agent support — fixed agent and script filters for PowerShell
• GitHub Actions workflows — hardened security in CI/CD pipelines

Docs

• AGENTS.md sync — synchronized documentation with AGENT_CONFIG for missing agents
• Manual test updates — ensured manual tests use local specify CLI

Update via Specify CLI: specify update or download directly from GitHub releases.

Source: Spec Kit