---
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 KaijiBot 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
`kaijibot.json` unless noted otherwise.

---

## Provider selection

| Key        | Type      | Default          | Description                                                                                 |
| ---------- | --------- | ---------------- | ------------------------------------------------------------------------------------------- |
| `provider` | `string`  | auto-detected    | Embedding adapter ID: `openai`, `gemini`, `voyage`, `mistral`, `bedrock`, `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, KaijiBot 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.
6. `bedrock` -- if the AWS SDK credential chain resolves (instance role, access keys, profile, SSO, web identity, or shared config).

`ollama` is supported but not auto-detected (set it explicitly).

### API key resolution

Remote embeddings require an API key. Bedrock uses the AWS SDK default
credential chain instead (instance roles, SSO, access keys).

| 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` |
| Bedrock  | AWS credential chain           | No API key needed                 |
| 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>

---

## Bedrock embedding config

Bedrock uses the AWS SDK default credential chain -- no API keys needed.
If KaijiBot runs on EC2 with a Bedrock-enabled instance role, just set the
provider and model:

```json5
{
  agents: {
    defaults: {
      memorySearch: {
        provider: "bedrock",
        model: "amazon.titan-embed-text-v2:0",
      },
    },
  },
}
```

| Key                    | Type     | Default                        | Description                     |
| ---------------------- | -------- | ------------------------------ | ------------------------------- |
| `model`                | `string` | `amazon.titan-embed-text-v2:0` | Any Bedrock embedding model ID  |
| `outputDimensionality` | `number` | model default                  | For Titan V2: 256, 512, or 1024 |

### Supported models

The following models are supported (with family detection and dimension
defaults):

| Model ID                                   | Provider   | Default Dims | Configurable Dims    |
| ------------------------------------------ | ---------- | ------------ | -------------------- |
| `amazon.titan-embed-text-v2:0`             | Amazon     | 1024         | 256, 512, 1024       |
| `amazon.titan-embed-text-v1`               | Amazon     | 1536         | --                   |
| `amazon.titan-embed-g1-text-02`            | Amazon     | 1536         | --                   |
| `amazon.titan-embed-image-v1`              | Amazon     | 1024         | --                   |
| `amazon.nova-2-multimodal-embeddings-v1:0` | Amazon     | 1024         | 256, 384, 1024, 3072 |
| `cohere.embed-english-v3`                  | Cohere     | 1024         | --                   |
| `cohere.embed-multilingual-v3`             | Cohere     | 1024         | --                   |
| `cohere.embed-v4:0`                        | Cohere     | 1536         | 256-1536             |
| `twelvelabs.marengo-embed-3-0-v1:0`        | TwelveLabs | 512          | --                   |
| `twelvelabs.marengo-embed-2-7-v1:0`        | TwelveLabs | 1024         | --                   |

Throughput-suffixed variants (e.g., `amazon.titan-embed-text-v1:2:8k`) inherit
the base model's configuration.

### Authentication

Bedrock auth uses the standard AWS SDK credential resolution order:

1. Environment variables (`AWS_ACCESS_KEY_ID` + `AWS_SECRET_ACCESS_KEY`)
2. SSO token cache
3. Web identity token credentials
4. Shared credentials and config files
5. ECS or EC2 metadata credentials

Region is resolved from `AWS_REGION`, `AWS_DEFAULT_REGION`, the
`amazon-bedrock` provider `baseUrl`, or defaults to `us-east-1`.

### IAM permissions

The IAM role or user needs:

```json
{
  "Effect": "Allow",
  "Action": "bedrock:InvokeModel",
  "Resource": "*"
}
```

For least-privilege, scope `InvokeModel` to the specific model:

```
arn:aws:bedrock:*::foundation-model/amazon.titan-embed-text-v2:0
```

---

## 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. Symlink handling depends on the active backend:
the builtin engine ignores symlinks, while QMD follows the underlying QMD
scanner behavior.

For agent-scoped cross-agent transcript search, use
`agents.list[].memorySearch.qmd.extraCollections` instead of `memory.qmd.paths`.
Those extra collections follow the same `{ path, name, pattern? }` shape, but
they are merged per agent and can preserve explicit shared names when the path
points outside the current workspace.
If the same resolved path appears in both `memory.qmd.paths` and
`memorySearch.qmd.extraCollections`, QMD keeps the first entry and skips the
duplicate.

---

## 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, KaijiBot falls back to in-process cosine
similarity automatically.

---

## Index storage

| Key                   | Type     | Default                               | Description                                 |
| --------------------- | -------- | ------------------------------------- | ------------------------------------------- |
| `store.path`          | `string` | `~/.kaijibot/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                             |

KaijiBot prefers the current QMD collection and MCP query shapes, but keeps
older QMD releases working by falling back to legacy `--mask` collection flags
and older MCP tool names when needed.

QMD model overrides stay on the QMD side, not KaijiBot config. If you need to
override QMD's models globally, set environment variables such as
`QMD_EMBED_MODEL`, `QMD_RERANK_MODEL`, and `QMD_GENERATE_MODEL` in the gateway
runtime environment.

### 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              |
| `update.updateTimeoutMs`  | `number`  | --      | Timeout for QMD update operations     |
| `update.embedTimeoutMs`   | `number`  | --      | Timeout for QMD embed operations      |

### 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" }],
    },
  },
}
```

---

## Dreaming (experimental)

Dreaming is configured under `plugins.entries.memory-core.config.dreaming`,
not under `agents.defaults.memorySearch`.

Dreaming runs as one scheduled sweep and uses internal light/deep/REM phases as
an implementation detail.

For conceptual behavior and slash commands, see [Dreaming](/concepts/dreaming).

### User settings

| Key         | Type      | Default     | Description                                       |
| ----------- | --------- | ----------- | ------------------------------------------------- |
| `enabled`   | `boolean` | `false`     | Enable or disable dreaming entirely               |
| `frequency` | `string`  | `0 3 * * *` | Optional cron cadence for the full dreaming sweep |

### Example

```json5
{
  plugins: {
    entries: {
      "memory-core": {
        config: {
          dreaming: {
            enabled: true,
            frequency: "0 3 * * *",
          },
        },
      },
    },
  },
}
```

Notes:

- Dreaming writes machine state to `memory/.dreams/`.
- Dreaming writes human-readable narrative output to `DREAMS.md` (or existing `dreams.md`).
- The light/deep/REM phase policy and thresholds are internal behavior, not user-facing config.
