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Spec Kit 0.4.5: Plugin Architecture Complete

Spec Kit 0.4.5 completes the plugin architecture migration, removes legacy scaffolding, and adds Claude Code as native skills with 5 new lifecycle extensions.

Spec Kit 0.4.5: Plugin Architecture Complete

TL;DR

  • Completed migration to plugin architecture — legacy scaffold path removed
  • Claude Code now installs as native skills with aligned preset/integration flows
  • 19 markdown agents and 2 TOML integrations (Gemini, Tabnine) migrated to plugins
  • 5 new lifecycle extensions added to community catalog

New

  • Claude Code native skills — Installs as native skills with aligned preset and integration flows
  • Lifecycle extensions — 5 new extensions added to community catalog
  • Dry-run flag — --dry-run flag added to create-new-feature script for safer testing
  • Community extensions docs — Website link added to README and extensions documentation
  • fix-findings extension — New community extension available in catalog

Fixed

  • Feature branch numbers with 4+ digits now supported correctly

Breaking Changes

  • Legacy scaffold path removed — Stage 6 migration complete. Update your workflows to use the new plugin-based architecture

Update: uv tool install specify-cli --from git+https://github.com/github/spec-kit.git@v0.4.5

Source: Spec Kit

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