Data Persistence

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Guide developers through storing data in canisters. Cover stable structures (StableBTreeMap in Rust), persistent actors (Motoko), MemoryManager for multiple data structures, and pre/post-upgrade hooks. Include idempotency patterns for safe data mutation. Show code examples for both Rust and Motoko.

• Portal: building-apps/canister-management/storage.mdx, best-practices/storage.mdx, best-practices/idempotency.mdx
• icskills: stable-memory
• Examples: daily_planner (both), superheroes (Motoko), photo_gallery (Rust)
• Rust CDK: https://docs.rs/ic-cdk/latest/ic_cdk/

• concepts/orthogonal-persistence — conceptual background
• guides/canister-management/lifecycle — upgrade hooks
• languages/rust/stable-structures — Rust-specific deep dive
• languages/motoko/ — Motoko persistence patterns