This guide is a simplified overview of all the changes in the Bedrock Edition 0.6.x releases, which assumes at least some familiarity with Bedrock Edition 0.5.0.
Datapack Codex — The all-versions Minecraft data pack reference. Community reference; not affiliated with Mojang Studios or Microsoft. “Minecraft” is a trademark of Mojang Synergies AB.
Primary syntax targets Minecraft Java Edition 1.21+ (singular folder names). Version-specific behaviour is flagged inline and mapped on the pack_format history page.