RiftPoint: a Rust-backed multiversal checkpointer for LangGraph agents
goldenphoenix713 · reddit · 2026-09-14
A developer hit memory and performance bottlenecks running dozens of concurrent speculative agent branches in LangGraph, since default checkpointers clone the full state payload per fork.
- They built RiftPoint, a custom BaseCheckpointSaver backed by a self-written Rust engine (janus-tachyon-rs)
- Instead of duplicating JSON blobs per branch, it handles pointer math and state tracking via multiversal branching
- Lets you spawn concurrent alternate agent paths (e.g., test 5 tool calls at once) and collapse to the best outcome at a fraction of the overhead
- Available via pip install riftpoint, open-sourced on GitHub
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