What are Extensions?

Extensions are content packages you can install on a fork to add a book's worth of feats, classes, spells, and items — without forking again.

Official extensions for Core SRD 3.5:

• Complete Warrior — fighter-style classes, combat feats, exotic weapons.

• Complete Adventurer — skill-focused classes and feats.

• Complete Arcane — arcane classes, metamagic, spells.

• Complete Divine — divine classes, domain spells, divine feats.

• Complete Scoundrel — skill tricks, rogue-style content.

• DMG — additional magic items, prestige classes, optional rules.

Community extensions. Any published, public fork that has no extensions of its own is automatically eligible to be installed as an extension by anyone forking the same base. There's no separate publish step — they show up in the same Browse list alongside the official ones, just publish your fork as public.

To install: from your fork, Extensions → Browse → Install. The new content appears in your fork immediately.

To uninstall: Extensions → Uninstall. Uninstall is blocked once any of your characters has picked content from the extension — switch those characters off the affected entities first.

If a community extension's author archives it, existing installations keep working — only new installs are blocked until the author unarchives.