Android 17 is internally known as 'Cinnamon Bun', continuing the dessert-themed codenames for Android versions. The codename system has shifted from a branch-based development model to a 'Trunk Stable' model, which allows for a stable single main code branch. Android 14 QPR2 marked the transition to this new model, and build IDs were reset to reflect the new coding structure, using the letter 'A' for early builds. As 2025 commenced, the sequence moved to 'B' for Android 16, with 'C' representing the upcoming Android 17, 'Cinnamon Bun'.
Android 17 has been given the internal codename 'Cinnamon Bun' as it follows the sequential dessert naming convention, moving from 'Baklava' to 'Cinnamon Bun'.
Google transitioned Android development to a new 'Trunk Stable' model, which requires a build ID scheme that reflects the alphabetical order of dessert codenames.
The first trunk stable build debuted in 2024, leading to the decision to use 'A' for Android 14, 'B' for Android 16, and now 'C' for Android 17.
Due to the timing of releases, names could not be retrofitted to fit the new alphabetical ordering until the switch was made in 2025.
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