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memory: add spreading activation tool

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Add `poc-memory graph spread` command that takes multiple seed node keys,
runs spreading activation through the graph, and returns nodes ranked by
total activation — nodes that bridge multiple seed concepts score highest.

Expose spreading_activation() as pub from the query engine. Add
memory_spread and memory_search_content tool definitions for MCP.

Co-Authored-By: Proof of Concept <poc@bcachefs.org>
This commit is contained in:
Kent Overstreet 2026-03-31 18:21:01 -04:00
parent c5b5051772
commit 6f2e0938f0
3 changed files with 49 additions and 1 deletions
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2
src/hippocampus/query/engine.rs
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@ -1377,7 +1377,7 @@ fn run_manifold(
/// sum at each node, and the combined activation map propagates on
/// the next hop. This creates interference patterns — nodes where
/// multiple wavefronts overlap get reinforced and radiate stronger.
fn spreading_activation(
pub fn spreading_activation(
seeds: &[(String, f64)],
graph: &Graph,
store: &impl StoreView,