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openclaw/docs/reference/memory-config.md

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---
title: "Memory configuration reference"
summary: "All configuration knobs for memory search, embedding providers, QMD, hybrid search, and multimodal indexing"
read_when:
- You want to configure memory search providers or embedding models
- You want to set up the QMD backend
- You want to tune hybrid search, MMR, or temporal decay
- You want to enable multimodal memory indexing
---
# Memory configuration reference
This page lists every configuration knob for OpenClaw memory search. For
conceptual overviews, see:
- [Memory Overview](/concepts/memory) -- how memory works
- [Builtin Engine](/concepts/memory-builtin) -- default SQLite backend
- [QMD Engine](/concepts/memory-qmd) -- local-first sidecar
- [Memory Search](/concepts/memory-search) -- search pipeline and tuning
All memory search settings live under `agents.defaults.memorySearch` in
`openclaw.json` unless noted otherwise.
---
## Provider selection
| Key | Type | Default | Description |
| ---------- | --------- | ---------------- | -------------------------------------------------------------------------------- |
| `provider` | `string` | auto-detected | Embedding adapter ID: `openai`, `gemini`, `voyage`, `mistral`, `ollama`, `local` |
| `model` | `string` | provider default | Embedding model name |
| `fallback` | `string` | `"none"` | Fallback adapter ID when the primary fails |
| `enabled` | `boolean` | `true` | Enable or disable memory search |
### Auto-detection order
When `provider` is not set, OpenClaw selects the first available:
1. `local` -- if `memorySearch.local.modelPath` is configured and the file exists.
2. `openai` -- if an OpenAI key can be resolved.
3. `gemini` -- if a Gemini key can be resolved.
4. `voyage` -- if a Voyage key can be resolved.
5. `mistral` -- if a Mistral key can be resolved.
`ollama` is supported but not auto-detected (set it explicitly).
### API key resolution
Remote embeddings require an API key. OpenClaw resolves from:
auth profiles, `models.providers.*.apiKey`, or environment variables.
| Provider | Env var | Config key |
| -------- | ------------------------------ | --------------------------------- |
| OpenAI | `OPENAI_API_KEY` | `models.providers.openai.apiKey` |
| Gemini | `GEMINI_API_KEY` | `models.providers.google.apiKey` |
| Voyage | `VOYAGE_API_KEY` | `models.providers.voyage.apiKey` |
| Mistral | `MISTRAL_API_KEY` | `models.providers.mistral.apiKey` |
| Ollama | `OLLAMA_API_KEY` (placeholder) | -- |
Codex OAuth covers chat/completions only and does not satisfy embedding
requests.
---
## Remote endpoint config
For custom OpenAI-compatible endpoints or overriding provider defaults:
| Key | Type | Description |
| ---------------- | -------- | -------------------------------------------------- |
| `remote.baseUrl` | `string` | Custom API base URL |
| `remote.apiKey` | `string` | Override API key |
| `remote.headers` | `object` | Extra HTTP headers (merged with provider defaults) |
```json5
{
agents: {
defaults: {
memorySearch: {
provider: "openai",
model: "text-embedding-3-small",
remote: {
baseUrl: "https://api.example.com/v1/",
apiKey: "YOUR_KEY",
},
},
},
},
}
```
---
## Gemini-specific config
| Key | Type | Default | Description |
| ---------------------- | -------- | ---------------------- | ------------------------------------------ |
| `model` | `string` | `gemini-embedding-001` | Also supports `gemini-embedding-2-preview` |
| `outputDimensionality` | `number` | `3072` | For Embedding 2: 768, 1536, or 3072 |
<Warning>
Changing model or `outputDimensionality` triggers an automatic full reindex.
</Warning>
---
## Local embedding config
| Key | Type | Default | Description |
| --------------------- | -------- | ---------------------- | ------------------------------- |
| `local.modelPath` | `string` | auto-downloaded | Path to GGUF model file |
| `local.modelCacheDir` | `string` | node-llama-cpp default | Cache dir for downloaded models |
Default model: `embeddinggemma-300m-qat-Q8_0.gguf` (~0.6 GB, auto-downloaded).
Requires native build: `pnpm approve-builds` then `pnpm rebuild node-llama-cpp`.
---
## Hybrid search config
All under `memorySearch.query.hybrid`:
| Key | Type | Default | Description |
| --------------------- | --------- | ------- | ---------------------------------- |
| `enabled` | `boolean` | `true` | Enable hybrid BM25 + vector search |
| `vectorWeight` | `number` | `0.7` | Weight for vector scores (0-1) |
| `textWeight` | `number` | `0.3` | Weight for BM25 scores (0-1) |
| `candidateMultiplier` | `number` | `4` | Candidate pool size multiplier |
### MMR (diversity)
| Key | Type | Default | Description |
| ------------- | --------- | ------- | ------------------------------------ |
| `mmr.enabled` | `boolean` | `false` | Enable MMR re-ranking |
| `mmr.lambda` | `number` | `0.7` | 0 = max diversity, 1 = max relevance |
### Temporal decay (recency)
| Key | Type | Default | Description |
| ---------------------------- | --------- | ------- | ------------------------- |
| `temporalDecay.enabled` | `boolean` | `false` | Enable recency boost |
| `temporalDecay.halfLifeDays` | `number` | `30` | Score halves every N days |
Evergreen files (`MEMORY.md`, non-dated files in `memory/`) are never decayed.
### Full example
```json5
{
agents: {
defaults: {
memorySearch: {
query: {
hybrid: {
vectorWeight: 0.7,
textWeight: 0.3,
mmr: { enabled: true, lambda: 0.7 },
temporalDecay: { enabled: true, halfLifeDays: 30 },
},
},
},
},
},
}
```
---
## Additional memory paths
| Key | Type | Description |
| ------------ | ---------- | ---------------------------------------- |
| `extraPaths` | `string[]` | Additional directories or files to index |
```json5
{
agents: {
defaults: {
memorySearch: {
extraPaths: ["../team-docs", "/srv/shared-notes"],
},
},
},
}
```
Paths can be absolute or workspace-relative. Directories are scanned
recursively for `.md` files. Symlinks are ignored.
---
## Multimodal memory (Gemini)
Index images and audio alongside Markdown using Gemini Embedding 2:
| Key | Type | Default | Description |
| ------------------------- | ---------- | ---------- | -------------------------------------- |
| `multimodal.enabled` | `boolean` | `false` | Enable multimodal indexing |
| `multimodal.modalities` | `string[]` | -- | `["image"]`, `["audio"]`, or `["all"]` |
| `multimodal.maxFileBytes` | `number` | `10000000` | Max file size for indexing |
Only applies to files in `extraPaths`. Default memory roots stay Markdown-only.
Requires `gemini-embedding-2-preview`. `fallback` must be `"none"`.
Supported formats: `.jpg`, `.jpeg`, `.png`, `.webp`, `.gif`, `.heic`, `.heif`
(images); `.mp3`, `.wav`, `.ogg`, `.opus`, `.m4a`, `.aac`, `.flac` (audio).
---
## Embedding cache
| Key | Type | Default | Description |
| ------------------ | --------- | ------- | -------------------------------- |
| `cache.enabled` | `boolean` | `false` | Cache chunk embeddings in SQLite |
| `cache.maxEntries` | `number` | `50000` | Max cached embeddings |
Prevents re-embedding unchanged text during reindex or transcript updates.
---
## Batch indexing
| Key | Type | Default | Description |
| ----------------------------- | --------- | ------- | -------------------------- |
| `remote.batch.enabled` | `boolean` | `false` | Enable batch embedding API |
| `remote.batch.concurrency` | `number` | `2` | Parallel batch jobs |
| `remote.batch.wait` | `boolean` | `true` | Wait for batch completion |
| `remote.batch.pollIntervalMs` | `number` | -- | Poll interval |
| `remote.batch.timeoutMinutes` | `number` | -- | Batch timeout |
Available for `openai`, `gemini`, and `voyage`. OpenAI batch is typically
fastest and cheapest for large backfills.
---
## Session memory search (experimental)
Index session transcripts and surface them via `memory_search`:
| Key | Type | Default | Description |
| ----------------------------- | ---------- | ------------ | --------------------------------------- |
| `experimental.sessionMemory` | `boolean` | `false` | Enable session indexing |
| `sources` | `string[]` | `["memory"]` | Add `"sessions"` to include transcripts |
| `sync.sessions.deltaBytes` | `number` | `100000` | Byte threshold for reindex |
| `sync.sessions.deltaMessages` | `number` | `50` | Message threshold for reindex |
Session indexing is opt-in and runs asynchronously. Results can be slightly
stale. Session logs live on disk, so treat filesystem access as the trust
boundary.
---
## SQLite vector acceleration (sqlite-vec)
| Key | Type | Default | Description |
| ---------------------------- | --------- | ------- | --------------------------------- |
| `store.vector.enabled` | `boolean` | `true` | Use sqlite-vec for vector queries |
| `store.vector.extensionPath` | `string` | bundled | Override sqlite-vec path |
When sqlite-vec is unavailable, OpenClaw falls back to in-process cosine
similarity automatically.
---
## Index storage
| Key | Type | Default | Description |
| --------------------- | -------- | ------------------------------------- | ------------------------------------------- |
| `store.path` | `string` | `~/.openclaw/memory/{agentId}.sqlite` | Index location (supports `{agentId}` token) |
| `store.fts.tokenizer` | `string` | `unicode61` | FTS5 tokenizer (`unicode61` or `trigram`) |
---
## QMD backend config
Set `memory.backend = "qmd"` to enable. All QMD settings live under
`memory.qmd`:
| Key | Type | Default | Description |
| ------------------------ | --------- | -------- | -------------------------------------------- |
| `command` | `string` | `qmd` | QMD executable path |
| `searchMode` | `string` | `search` | Search command: `search`, `vsearch`, `query` |
| `includeDefaultMemory` | `boolean` | `true` | Auto-index `MEMORY.md` + `memory/**/*.md` |
| `paths[]` | `array` | -- | Extra paths: `{ name, path, pattern? }` |
| `sessions.enabled` | `boolean` | `false` | Index session transcripts |
| `sessions.retentionDays` | `number` | -- | Transcript retention |
| `sessions.exportDir` | `string` | -- | Export directory |
### Update schedule
| Key | Type | Default | Description |
| ------------------------- | --------- | ------- | ------------------------------------- |
| `update.interval` | `string` | `5m` | Refresh interval |
| `update.debounceMs` | `number` | `15000` | Debounce file changes |
| `update.onBoot` | `boolean` | `true` | Refresh on startup |
| `update.waitForBootSync` | `boolean` | `false` | Block startup until refresh completes |
| `update.embedInterval` | `string` | -- | Separate embed cadence |
| `update.commandTimeoutMs` | `number` | -- | Timeout for QMD commands |
### Limits
| Key | Type | Default | Description |
| ------------------------- | -------- | ------- | -------------------------- |
| `limits.maxResults` | `number` | `6` | Max search results |
| `limits.maxSnippetChars` | `number` | -- | Clamp snippet length |
| `limits.maxInjectedChars` | `number` | -- | Clamp total injected chars |
| `limits.timeoutMs` | `number` | `4000` | Search timeout |
### Scope
Controls which sessions can receive QMD search results. Same schema as
[`session.sendPolicy`](/gateway/configuration-reference#session):
```json5
{
memory: {
qmd: {
scope: {
default: "deny",
rules: [{ action: "allow", match: { chatType: "direct" } }],
},
},
},
}
```
Default is DM-only. `match.keyPrefix` matches the normalized session key;
`match.rawKeyPrefix` matches the raw key including `agent:<id>:`.
### Citations
`memory.citations` applies to all backends:
| Value | Behavior |
| ---------------- | --------------------------------------------------- |
| `auto` (default) | Include `Source: <path#line>` footer in snippets |
| `on` | Always include footer |
| `off` | Omit footer (path still passed to agent internally) |
### Full QMD example
```json5
{
memory: {
backend: "qmd",
citations: "auto",
qmd: {
includeDefaultMemory: true,
update: { interval: "5m", debounceMs: 15000 },
limits: { maxResults: 6, timeoutMs: 4000 },
scope: {
default: "deny",
rules: [{ action: "allow", match: { chatType: "direct" } }],
},
paths: [{ name: "docs", path: "~/notes", pattern: "**/*.md" }],
},
},
}
```
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