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feat: add hybrid memory search

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This commit is contained in:
Peter Steinberger
2026-01-18 01:42:25 +00:00
parent 0fb2777c6d
commit ccb30665f7
8 changed files with 389 additions and 25 deletions
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45
src/agents/memory-search.ts
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@@ -53,6 +53,12 @@ export type ResolvedMemorySearchConfig = {
query: {
maxResults: number;
minScore: number;
hybrid: {
enabled: boolean;
vectorWeight: number;
textWeight: number;
candidateMultiplier: number;
};
};
cache: {
enabled: boolean;
@@ -66,6 +72,10 @@ const DEFAULT_CHUNK_OVERLAP = 80;
const DEFAULT_WATCH_DEBOUNCE_MS = 1500;
const DEFAULT_MAX_RESULTS = 6;
const DEFAULT_MIN_SCORE = 0.35;
const DEFAULT_HYBRID_ENABLED = true;
const DEFAULT_HYBRID_VECTOR_WEIGHT = 0.7;
const DEFAULT_HYBRID_TEXT_WEIGHT = 0.3;
const DEFAULT_HYBRID_CANDIDATE_MULTIPLIER = 4;
const DEFAULT_CACHE_ENABLED = true;
const DEFAULT_SOURCES: Array<"memory" | "sessions"> = ["memory"];
@@ -157,6 +167,24 @@ function mergeConfig(
maxResults: overrides?.query?.maxResults ?? defaults?.query?.maxResults ?? DEFAULT_MAX_RESULTS,
minScore: overrides?.query?.minScore ?? defaults?.query?.minScore ?? DEFAULT_MIN_SCORE,
};
const hybrid = {
enabled:
overrides?.query?.hybrid?.enabled ??
defaults?.query?.hybrid?.enabled ??
DEFAULT_HYBRID_ENABLED,
vectorWeight:
overrides?.query?.hybrid?.vectorWeight ??
defaults?.query?.hybrid?.vectorWeight ??
DEFAULT_HYBRID_VECTOR_WEIGHT,
textWeight:
overrides?.query?.hybrid?.textWeight ??
defaults?.query?.hybrid?.textWeight ??
DEFAULT_HYBRID_TEXT_WEIGHT,
candidateMultiplier:
overrides?.query?.hybrid?.candidateMultiplier ??
defaults?.query?.hybrid?.candidateMultiplier ??
DEFAULT_HYBRID_CANDIDATE_MULTIPLIER,
};
const cache = {
enabled: overrides?.cache?.enabled ?? defaults?.cache?.enabled ?? DEFAULT_CACHE_ENABLED,
maxEntries: overrides?.cache?.maxEntries ?? defaults?.cache?.maxEntries,
@@ -164,6 +192,12 @@ function mergeConfig(
const overlap = Math.max(0, Math.min(chunking.overlap, chunking.tokens - 1));
const minScore = Math.max(0, Math.min(1, query.minScore));
const vectorWeight = Math.max(0, Math.min(1, hybrid.vectorWeight));
const textWeight = Math.max(0, Math.min(1, hybrid.textWeight));
const sum = vectorWeight + textWeight;
const normalizedVectorWeight = sum > 0 ? vectorWeight / sum : DEFAULT_HYBRID_VECTOR_WEIGHT;
const normalizedTextWeight = sum > 0 ? textWeight / sum : DEFAULT_HYBRID_TEXT_WEIGHT;
const candidateMultiplier = Math.max(1, Math.min(20, Math.floor(hybrid.candidateMultiplier)));
return {
enabled,
sources,
@@ -178,7 +212,16 @@ function mergeConfig(
store,
chunking: { tokens: Math.max(1, chunking.tokens), overlap },
sync,
query: { ...query, minScore },
query: {
...query,
minScore,
hybrid: {
enabled: Boolean(hybrid.enabled),
vectorWeight: normalizedVectorWeight,
textWeight: normalizedTextWeight,
candidateMultiplier,
},
},
cache: {
enabled: Boolean(cache.enabled),
maxEntries: