1 Commits

Author SHA1 Message Date
0cdfec7557 chore(orchestrator): Bootstrap PRD + TASKS.md for v0.0.1
Phase 1: OpenClaw ContextEngine plugin backed by OpenBrain (8 tasks, ~83K est)
Stack: TypeScript, openclaw/plugin-sdk, OpenBrain REST
2026-03-06 08:07:43 -06:00
21 changed files with 15 additions and 10470 deletions

4
.gitignore vendored
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node_modules
dist
coverage
.DS_Store

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# ⚠️ This repo has been archived
**Migrated to:** [`mosaic/mosaic`](https://git.mosaicstack.dev/mosaic/mosaic) — `plugins/openclaw-context/`
**Package:** `@mosaic/openclaw-context`
**Date:** 2026-03-06
Install via:
```bash
npm install @mosaic/openclaw-context --registry https://git.mosaicstack.dev/api/packages/mosaic/npm
```
All future development happens in the monorepo. This repo is read-only.

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@@ -1,97 +1,2 @@
# openclaw-openbrain-context # openclaw-openbrain-context
OpenBrain-backed `ContextEngine` plugin for OpenClaw.
This plugin stores session context in OpenBrain over REST so context can be reassembled from recent history plus semantic matches instead of relying only on in-session compaction state.
## Features
- Registers context engine id: `openbrain`
- Typed OpenBrain REST client with Bearer auth
- Session-aware ingest + batch ingest
- Context assembly from recent + semantic search under token budget
- Compaction summaries archived to OpenBrain
- Subagent seed/result handoff helpers
## Requirements
- OpenClaw with plugin/context-engine support (`openclaw >= 2026.3.2`)
- Reachable OpenBrain REST API
- OpenBrain API key
## Install (local workspace plugin)
```bash
pnpm install
pnpm build
```
Then reference this plugin in your OpenClaw config.
## OpenBrain Setup (self-host or hosted)
You must provide both of these in plugin config:
- `baseUrl`: your OpenBrain API root (example: `https://brain.your-domain.com`)
- `apiKey`: Bearer token for your OpenBrain instance
No host or key fallback is built in. Missing `baseUrl` or `apiKey` throws `OpenBrainConfigError` at `bootstrap()`.
## Configuration
Plugin entry id: `openclaw-openbrain-context`
Context engine slot id: `openbrain`
### Config fields
- `baseUrl` (required, string): OpenBrain API base URL
- `apiKey` (required, string): OpenBrain Bearer token
- `source` (optional, string, default `openclaw`): source prefix; engine stores thoughts under `<source>:<sessionId>`
- `recentMessages` (optional, integer, default `20`): recent thoughts to fetch for bootstrap/assemble
- `semanticSearchLimit` (optional, integer, default `10`): semantic matches fetched in assemble
- `subagentRecentMessages` (optional, integer, default `8`): context lines used for subagent seed/result exchange
## Environment Variable Pattern
Use OpenClaw variable interpolation in `openclaw.json`:
```json
{
"apiKey": "${OPENBRAIN_API_KEY}"
}
```
Then set it in your shell/runtime environment before starting OpenClaw.
## Example `openclaw.json`
```json
{
"plugins": {
"slots": {
"contextEngine": "openbrain"
},
"entries": {
"openclaw-openbrain-context": {
"enabled": true,
"config": {
"baseUrl": "https://brain.example.com",
"apiKey": "${OPENBRAIN_API_KEY}",
"source": "openclaw",
"recentMessages": 20,
"semanticSearchLimit": 10,
"subagentRecentMessages": 8
}
}
}
}
}
```
## Development
```bash
pnpm lint
pnpm build
pnpm test
```

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## Problem Statement ## Problem Statement
OpenClaw compacts context when sessions grow long, causing information loss. The new `ContextEngine` plugin interface (merged in PR #22201) allows replacing the default compaction strategy with a persistent, lossless alternative. OpenBrain is a self-hosted pgvector + REST API service that can store and semantically retrieve conversation context indefinitely. OpenClaw compacts context when sessions grow long, causing information loss. The new `ContextEngine` plugin interface (merged in PR #22201) allows replacing the default compaction strategy with a persistent, lossless alternative. OpenBrain (brain.woltje.com) is a live pgvector + REST API service that can store and semantically retrieve conversation context indefinitely.
## Solution ## Solution
@@ -20,8 +20,8 @@ lossless-claw (https://github.com/Martian-Engineering/lossless-claw) is the prim
## OpenBrain API ## OpenBrain API
``` ```
Base: <user-configured — OPENBRAIN_URL env var or plugin config.baseUrl — NO DEFAULT> Base: https://brain.woltje.com
Auth: Bearer <OPENBRAIN_API_KEY env var or plugin config.apiKey — NO DEFAULT> Auth: Bearer <OPENBRAIN_API_KEY>
POST /v1/thoughts { content, source, metadata } POST /v1/thoughts { content, source, metadata }
POST /v1/search { query, limit } POST /v1/search { query, limit }
@@ -85,8 +85,8 @@ export function register(api: OpenClawPluginApi) {
"openclaw-openbrain-context": { "openclaw-openbrain-context": {
"enabled": true, "enabled": true,
"config": { "config": {
"baseUrl": "https://your-openbrain-instance.example.com", "baseUrl": "https://brain.woltje.com",
"apiKey": "your-api-key", "apiKey": "${OPENBRAIN_API_KEY}",
"recentMessages": 20, "recentMessages": 20,
"semanticSearchLimit": 10, "semanticSearchLimit": 10,
"source": "openclaw" "source": "openclaw"
@@ -103,27 +103,15 @@ export function register(api: OpenClawPluginApi) {
- openclaw/plugin-sdk for ContextEngine interface - openclaw/plugin-sdk for ContextEngine interface
- pnpm, vitest, ESLint - pnpm, vitest, ESLint
## ⚠️ Hard Rule: No Hardcoded Instance Values
This plugin will be used by anyone running their own OpenBrain instance. The following are STRICTLY FORBIDDEN in source code, defaults, or fallback logic:
- Any hardcoded URL (no `brain.woltje.com` or any other specific domain)
- Any hardcoded API key
- Any `process.env.OPENBRAIN_URL || 'https://brain.woltje.com'` fallback patterns
Required behavior:
- `baseUrl` and `apiKey` MUST be provided via plugin config or env vars
- If either is missing, throw `OpenBrainConfigError` at `bootstrap()` time with a clear message: "openclaw-openbrain-context: baseUrl and apiKey are required. Set them in your openclaw.json plugin config."
- No silent degradation, no defaults to any specific host
## Acceptance Criteria (v0.0.1) ## Acceptance Criteria (v0.0.1)
1. Plugin registers as a ContextEngine with id `openbrain` 1. Plugin registers as a ContextEngine with id `openbrain`
2. `ingest()` stores messages to OpenBrain with correct metadata 2. `ingest()` stores messages to OpenBrain with correct metadata
3. `assemble()` retrieves recent + semantically relevant context within token budget 3. `assemble()` retrieves recent + semantically relevant context within token budget
4. `compact()` archives turn summary, returns minimal prompt-injection 4. `compact()` archives turn summary, returns minimal prompt-injection
5. `bootstrap()` loads prior session context on restart; throws `OpenBrainConfigError` if config missing 5. `bootstrap()` loads prior session context on restart
6. Tests pass, TypeScript strict, ESLint clean 6. Tests pass, TypeScript strict, ESLint clean
7. openclaw.plugin.json with correct manifest 7. openclaw.plugin.json with correct manifest
8. README documents: self-host OpenBrain setup, all config options with types/defaults, env var pattern, example config 8. README: install + config + usage
## ASSUMPTION: ContextEngine interface shape ## ASSUMPTION: ContextEngine interface shape
Based on lossless-claw source and PR #22201. Plugin SDK import path: `openclaw/plugin-sdk`. Based on lossless-claw source and PR #22201. Plugin SDK import path: `openclaw/plugin-sdk`.

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| id | status | description | issue | repo | branch | depends_on | blocks | agent | started_at | completed_at | estimate | used | notes | | id | status | description | issue | repo | branch | depends_on | blocks | agent | started_at | completed_at | estimate | used | notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---| |---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OBC-001 | done | Init: pnpm, TypeScript strict, ESLint, vitest, openclaw plugin-sdk dep | TASKS:P1 | openclaw-openbrain-context | feat/engine | | OBC-002 | | | | 8K | | | | OBC-001 | not-started | Init: pnpm, TypeScript strict, ESLint, vitest, openclaw plugin-sdk dep | TASKS:P1 | openclaw-openbrain-context | feat/engine | | OBC-002 | | | | 8K | | |
| OBC-002 | done | OpenBrain REST client module (typed, auth, error handling) | TASKS:P1 | openclaw-openbrain-context | feat/engine | OBC-001 | OBC-003 | | | | 8K | | | | OBC-002 | not-started | OpenBrain REST client module (typed, auth, error handling) | TASKS:P1 | openclaw-openbrain-context | feat/engine | OBC-001 | OBC-003 | | | | 8K | | |
| OBC-003 | done | ContextEngine implementation: bootstrap + ingest + ingestBatch | TASKS:P1 | openclaw-openbrain-context | feat/engine | OBC-002 | OBC-004 | | | | 15K | | | | OBC-003 | not-started | ContextEngine implementation: bootstrap + ingest + ingestBatch | TASKS:P1 | openclaw-openbrain-context | feat/engine | OBC-002 | OBC-004 | | | | 15K | | |
| OBC-004 | done | ContextEngine implementation: assemble (recent + semantic merge) | TASKS:P1 | openclaw-openbrain-context | feat/engine | OBC-003 | OBC-005 | | | | 15K | | | | OBC-004 | not-started | ContextEngine implementation: assemble (recent + semantic merge) | TASKS:P1 | openclaw-openbrain-context | feat/engine | OBC-003 | OBC-005 | | | | 15K | | |
| OBC-005 | done | ContextEngine implementation: compact + prepareSubagentSpawn + onSubagentEnded + dispose | TASKS:P1 | openclaw-openbrain-context | feat/engine | OBC-004 | OBC-006 | | | | 12K | | | | OBC-005 | not-started | ContextEngine implementation: compact + prepareSubagentSpawn + onSubagentEnded + dispose | TASKS:P1 | openclaw-openbrain-context | feat/engine | OBC-004 | OBC-006 | | | | 12K | | |
| OBC-006 | done | Plugin entrypoint: register(), openclaw.plugin.json manifest | TASKS:P1 | openclaw-openbrain-context | feat/engine | OBC-005 | OBC-007 | | | | 5K | | | | OBC-006 | not-started | Plugin entrypoint: register(), openclaw.plugin.json manifest | TASKS:P1 | openclaw-openbrain-context | feat/engine | OBC-005 | OBC-007 | | | | 5K | | |
| OBC-007 | done | Unit tests: ingest/assemble/compact + mock OpenBrain responses | TASKS:P1 | openclaw-openbrain-context | feat/engine | OBC-006 | OBC-008 | | | | 15K | | | | OBC-007 | not-started | Unit tests: ingest/assemble/compact + mock OpenBrain responses | TASKS:P1 | openclaw-openbrain-context | feat/engine | OBC-006 | OBC-008 | | | | 15K | | |
| OBC-008 | done | README + install instructions + openclaw.json config example | TASKS:P1 | openclaw-openbrain-context | feat/engine | OBC-007 | | | | | 5K | | | | OBC-008 | not-started | README + install instructions + openclaw.json config example | TASKS:P1 | openclaw-openbrain-context | feat/engine | OBC-007 | | | | | 5K | | |

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import js from "@eslint/js";
import tseslint from "typescript-eslint";
export default [
{
ignores: ["dist/**", "coverage/**"],
},
js.configs.recommended,
...tseslint.configs.recommended,
{
files: ["**/*.ts"],
languageOptions: {
ecmaVersion: "latest",
sourceType: "module",
},
rules: {
"@typescript-eslint/consistent-type-imports": [
"error",
{
prefer: "type-imports",
fixStyle: "inline-type-imports",
},
],
},
},
];

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{
"id": "openclaw-openbrain-context",
"name": "OpenBrain Context Engine",
"description": "OpenBrain-backed ContextEngine plugin for OpenClaw",
"version": "0.0.1",
"kind": "context-engine",
"configSchema": {
"type": "object",
"additionalProperties": false,
"required": ["baseUrl", "apiKey"],
"properties": {
"baseUrl": {
"type": "string",
"minLength": 1,
"description": "Base URL of your OpenBrain REST API"
},
"apiKey": {
"type": "string",
"minLength": 1,
"description": "Bearer token used to authenticate against OpenBrain"
},
"source": {
"type": "string",
"minLength": 1,
"default": "openclaw",
"description": "Source prefix stored in OpenBrain (session id is appended)"
},
"recentMessages": {
"type": "integer",
"minimum": 1,
"default": 20,
"description": "How many recent thoughts to fetch during assemble/bootstrap"
},
"semanticSearchLimit": {
"type": "integer",
"minimum": 1,
"default": 10,
"description": "How many semantic matches to request during assemble"
},
"subagentRecentMessages": {
"type": "integer",
"minimum": 1,
"default": 8,
"description": "How many thoughts to use when seeding/summarizing subagents"
}
}
},
"uiHints": {
"baseUrl": {
"label": "OpenBrain Base URL",
"placeholder": "https://brain.example.com"
},
"apiKey": {
"label": "OpenBrain API Key",
"sensitive": true
}
}
}

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{
"name": "openclaw-openbrain-context",
"version": "0.0.1",
"description": "OpenBrain-backed ContextEngine plugin for OpenClaw",
"type": "module",
"main": "dist/index.js",
"types": "dist/index.d.ts",
"files": [
"dist",
"openclaw.plugin.json",
"README.md"
],
"scripts": {
"lint": "eslint . --max-warnings=0",
"build": "tsc -p tsconfig.json",
"test": "vitest run"
},
"peerDependencies": {
"openclaw": ">=2026.3.2"
},
"devDependencies": {
"@eslint/js": "^9.25.1",
"@types/node": "^22.15.3",
"eslint": "^9.25.1",
"typescript": "^5.8.3",
"typescript-eslint": "^8.30.1",
"vitest": "^2.1.8"
}
}

8341
pnpm-lock.yaml generated

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export const OPENBRAIN_CONTEXT_ENGINE_ID = "openbrain";
export const OPENBRAIN_PLUGIN_ID = "openclaw-openbrain-context";
export const OPENBRAIN_PLUGIN_VERSION = "0.0.1";

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import { OPENBRAIN_CONTEXT_ENGINE_ID, OPENBRAIN_PLUGIN_VERSION } from "./constants.js";
import { OpenBrainConfigError } from "./errors.js";
import type {
AgentMessage,
AssembleResult,
BootstrapResult,
CompactResult,
ContextEngine,
ContextEngineInfo,
IngestBatchResult,
IngestResult,
PluginLogger,
SubagentEndReason,
SubagentSpawnPreparation,
} from "./openclaw-types.js";
import {
OpenBrainClient,
type OpenBrainClientLike,
type OpenBrainSearchInput,
type OpenBrainThought,
type OpenBrainThoughtMetadata,
} from "./openbrain-client.js";
export type OpenBrainContextEngineConfig = {
baseUrl?: string;
apiKey?: string;
recentMessages?: number;
semanticSearchLimit?: number;
source?: string;
subagentRecentMessages?: number;
};
type ResolvedOpenBrainContextEngineConfig = {
baseUrl: string;
apiKey: string;
recentMessages: number;
semanticSearchLimit: number;
source: string;
subagentRecentMessages: number;
};
export type OpenBrainContextEngineDeps = {
createClient?: (config: ResolvedOpenBrainContextEngineConfig) => OpenBrainClientLike;
now?: () => number;
logger?: PluginLogger;
};
type SubagentState = {
parentSessionKey: string;
seedThoughtId?: string;
};
function isRecord(value: unknown): value is Record<string, unknown> {
return typeof value === "object" && value !== null;
}
function parsePositiveInteger(value: unknown, fallback: number): number {
if (typeof value !== "number" || !Number.isFinite(value)) {
return fallback;
}
const rounded = Math.floor(value);
return rounded > 0 ? rounded : fallback;
}
function normalizeRole(role: unknown): string {
if (typeof role !== "string" || role.length === 0) {
return "assistant";
}
if (role === "user" || role === "assistant" || role === "tool" || role === "system") {
return role;
}
return "assistant";
}
function serializeContent(value: unknown): string {
if (typeof value === "string") {
return value;
}
if (Array.isArray(value)) {
return value
.map((part) => serializeContent(part))
.filter((part) => part.length > 0)
.join("\n")
.trim();
}
if (isRecord(value) && typeof value.text === "string") {
return value.text;
}
if (value === undefined || value === null) {
return "";
}
try {
return JSON.stringify(value);
} catch {
return String(value);
}
}
function estimateTextTokens(text: string): number {
const normalized = text.trim();
if (normalized.length === 0) {
return 1;
}
return Math.max(1, Math.ceil(normalized.length / 4) + 4);
}
function thoughtTimestamp(thought: OpenBrainThought, fallbackTimestamp: number): number {
const createdAt =
thought.createdAt ??
(typeof thought.created_at === "string" ? thought.created_at : undefined);
if (createdAt === undefined) {
return fallbackTimestamp;
}
const parsed = Date.parse(createdAt);
return Number.isFinite(parsed) ? parsed : fallbackTimestamp;
}
function thoughtFingerprint(thought: OpenBrainThought): string {
const role = typeof thought.metadata?.role === "string" ? thought.metadata.role : "assistant";
return `${role}\n${thought.content}`;
}
function truncateLine(value: string, maxLength: number): string {
if (value.length <= maxLength) {
return value;
}
return `${value.slice(0, maxLength - 3)}...`;
}
export class OpenBrainContextEngine implements ContextEngine {
readonly info: ContextEngineInfo = {
id: OPENBRAIN_CONTEXT_ENGINE_ID,
name: "OpenBrain Context Engine",
version: OPENBRAIN_PLUGIN_VERSION,
ownsCompaction: true,
};
private readonly rawConfig: unknown;
private readonly createClientFn:
| ((config: ResolvedOpenBrainContextEngineConfig) => OpenBrainClientLike)
| undefined;
private readonly now: () => number;
private readonly logger: PluginLogger | undefined;
private config: ResolvedOpenBrainContextEngineConfig | undefined;
private client: OpenBrainClientLike | undefined;
private readonly sessionTurns = new Map<string, number>();
private readonly subagentState = new Map<string, SubagentState>();
private disposed = false;
constructor(rawConfig: unknown, deps?: OpenBrainContextEngineDeps) {
this.rawConfig = rawConfig;
this.createClientFn = deps?.createClient;
this.now = deps?.now ?? (() => Date.now());
this.logger = deps?.logger;
}
async bootstrap(params: { sessionId: string; sessionFile: string }): Promise<BootstrapResult> {
this.assertNotDisposed();
const config = this.getConfig();
const client = this.getClient();
const source = this.sourceForSession(params.sessionId);
const recentThoughts = await client.listRecent({
limit: config.recentMessages,
source,
});
const sessionThoughts = this.filterSessionThoughts(recentThoughts, params.sessionId);
let maxTurn = -1;
for (const thought of sessionThoughts) {
const turn = thought.metadata?.turn;
if (typeof turn === "number" && Number.isFinite(turn) && turn > maxTurn) {
maxTurn = turn;
}
}
this.sessionTurns.set(params.sessionId, maxTurn + 1);
return {
bootstrapped: true,
importedMessages: sessionThoughts.length,
};
}
async ingest(params: {
sessionId: string;
message: AgentMessage;
isHeartbeat?: boolean;
}): Promise<IngestResult> {
this.assertNotDisposed();
const client = this.getClient();
const content = serializeContent(params.message.content).trim();
if (content.length === 0) {
return { ingested: false };
}
const metadata: OpenBrainThoughtMetadata = {
sessionId: params.sessionId,
turn: this.nextTurn(params.sessionId),
role: normalizeRole(params.message.role),
type: "message",
};
if (params.isHeartbeat === true) {
metadata.isHeartbeat = true;
}
await client.createThought({
content,
source: this.sourceForSession(params.sessionId),
metadata,
});
return { ingested: true };
}
async ingestBatch(params: {
sessionId: string;
messages: AgentMessage[];
isHeartbeat?: boolean;
}): Promise<IngestBatchResult> {
this.assertNotDisposed();
const maxConcurrency = 5;
let ingestedCount = 0;
for (let i = 0; i < params.messages.length; i += maxConcurrency) {
const chunk = params.messages.slice(i, i + maxConcurrency);
const results = await Promise.all(
chunk.map((message) => {
const ingestParams: {
sessionId: string;
message: AgentMessage;
isHeartbeat?: boolean;
} = {
sessionId: params.sessionId,
message,
};
if (params.isHeartbeat !== undefined) {
ingestParams.isHeartbeat = params.isHeartbeat;
}
return this.ingest(ingestParams);
}),
);
for (const result of results) {
if (result.ingested) {
ingestedCount += 1;
}
}
}
return { ingestedCount };
}
async assemble(params: {
sessionId: string;
messages: AgentMessage[];
tokenBudget?: number;
}): Promise<AssembleResult> {
this.assertNotDisposed();
const config = this.getConfig();
const client = this.getClient();
const source = this.sourceForSession(params.sessionId);
const recentThoughts = this.filterSessionThoughts(
await client.listRecent({
limit: config.recentMessages,
source,
}),
params.sessionId,
);
const semanticThoughts = await this.searchSemanticThoughts({
client,
source,
config,
sessionId: params.sessionId,
messages: params.messages,
});
const mergedThoughts = this.mergeThoughts(recentThoughts, semanticThoughts);
const mergedMessages =
mergedThoughts.length > 0
? mergedThoughts.map((thought, index) => this.toAgentMessage(thought, index))
: params.messages;
const tokenBudget = params.tokenBudget;
const budgetedMessages =
typeof tokenBudget === "number" && tokenBudget > 0
? this.trimToBudget(mergedMessages, tokenBudget)
: mergedMessages;
return {
messages: budgetedMessages,
estimatedTokens: this.estimateTokensForMessages(budgetedMessages),
};
}
async compact(params: {
sessionId: string;
sessionFile: string;
tokenBudget?: number;
force?: boolean;
currentTokenCount?: number;
compactionTarget?: "budget" | "threshold";
customInstructions?: string;
legacyParams?: Record<string, unknown>;
}): Promise<CompactResult> {
this.assertNotDisposed();
const config = this.getConfig();
const client = this.getClient();
const source = this.sourceForSession(params.sessionId);
const recentThoughts = this.filterSessionThoughts(
await client.listRecent({
limit: Math.max(config.recentMessages, config.subagentRecentMessages),
source,
}),
params.sessionId,
);
if (recentThoughts.length === 0) {
return {
ok: true,
compacted: false,
reason: "no-session-context",
result: {
tokensBefore: 0,
tokensAfter: 0,
},
};
}
const summarizedThoughts = this.selectSummaryThoughts(recentThoughts);
const summary = this.buildSummary(
params.customInstructions !== undefined
? {
sessionId: params.sessionId,
thoughts: summarizedThoughts,
customInstructions: params.customInstructions,
}
: {
sessionId: params.sessionId,
thoughts: summarizedThoughts,
},
);
const summaryTokens = estimateTextTokens(summary);
const tokensBefore = this.estimateTokensForThoughts(summarizedThoughts);
await client.createThought({
content: summary,
source,
metadata: {
sessionId: params.sessionId,
turn: this.nextTurn(params.sessionId),
role: "assistant",
type: "summary",
},
});
const summaryThoughtIds = Array.from(
new Set(
summarizedThoughts
.map((thought) => thought.id.trim())
.filter((id) => id.length > 0),
),
);
await Promise.all(summaryThoughtIds.map((thoughtId) => client.deleteThought(thoughtId)));
return {
ok: true,
compacted: true,
reason: "summary-archived",
result: {
summary,
tokensBefore,
tokensAfter: summaryTokens,
},
};
}
async prepareSubagentSpawn(params: {
parentSessionKey: string;
childSessionKey: string;
ttlMs?: number;
}): Promise<SubagentSpawnPreparation | undefined> {
this.assertNotDisposed();
const config = this.getConfig();
const client = this.getClient();
const parentThoughts = this.filterSessionThoughts(
await client.listRecent({
limit: config.subagentRecentMessages,
source: this.sourceForSession(params.parentSessionKey),
}),
params.parentSessionKey,
);
const seedContent = this.buildSubagentSeedContent({
parentSessionKey: params.parentSessionKey,
childSessionKey: params.childSessionKey,
thoughts: parentThoughts,
});
const createdThought = await client.createThought({
content: seedContent,
source: this.sourceForSession(params.childSessionKey),
metadata: {
sessionId: params.childSessionKey,
role: "assistant",
type: "summary",
parentSessionId: params.parentSessionKey,
ttlMs: params.ttlMs,
},
});
this.subagentState.set(params.childSessionKey, {
parentSessionKey: params.parentSessionKey,
seedThoughtId: createdThought.id,
});
return {
rollback: async () => {
const state = this.subagentState.get(params.childSessionKey);
this.subagentState.delete(params.childSessionKey);
if (state?.seedThoughtId !== undefined && state.seedThoughtId.length > 0) {
await client.deleteThought(state.seedThoughtId);
}
},
};
}
async onSubagentEnded(params: {
childSessionKey: string;
reason: SubagentEndReason;
}): Promise<void> {
this.assertNotDisposed();
const state = this.subagentState.get(params.childSessionKey);
if (state === undefined) {
return;
}
const client = this.getClient();
const config = this.getConfig();
const childThoughts = this.filterSessionThoughts(
await client.listRecent({
limit: config.subagentRecentMessages,
source: this.sourceForSession(params.childSessionKey),
}),
params.childSessionKey,
);
const summary = this.buildSubagentResultSummary({
childSessionKey: params.childSessionKey,
reason: params.reason,
thoughts: childThoughts,
});
await client.createThought({
content: summary,
source: this.sourceForSession(state.parentSessionKey),
metadata: {
sessionId: state.parentSessionKey,
turn: this.nextTurn(state.parentSessionKey),
role: "tool",
type: "subagent-result",
childSessionId: params.childSessionKey,
reason: params.reason,
},
});
this.subagentState.delete(params.childSessionKey);
}
async dispose(): Promise<void> {
this.sessionTurns.clear();
this.subagentState.clear();
this.disposed = true;
}
private searchSemanticThoughts(params: {
client: OpenBrainClientLike;
source: string;
config: ResolvedOpenBrainContextEngineConfig;
sessionId: string;
messages: AgentMessage[];
}): Promise<OpenBrainThought[]> {
const query = this.pickSemanticQuery(params.messages);
if (query === undefined || query.length === 0 || params.config.semanticSearchLimit <= 0) {
return Promise.resolve([]);
}
const request: OpenBrainSearchInput = {
query,
limit: params.config.semanticSearchLimit,
source: params.source,
};
return params.client
.search(request)
.then((results) => this.filterSessionThoughts(results, params.sessionId))
.catch((error) => {
this.logger?.warn?.("OpenBrain semantic search failed", error);
return [];
});
}
private pickSemanticQuery(messages: AgentMessage[]): string | undefined {
for (let i = messages.length - 1; i >= 0; i -= 1) {
const message = messages[i];
if (message === undefined) {
continue;
}
if (normalizeRole(message.role) !== "user") {
continue;
}
const content = serializeContent(message.content).trim();
if (content.length > 0) {
return content;
}
}
for (let i = messages.length - 1; i >= 0; i -= 1) {
const message = messages[i];
if (message === undefined) {
continue;
}
const content = serializeContent(message.content).trim();
if (content.length > 0) {
return content;
}
}
return undefined;
}
private mergeThoughts(recentThoughts: OpenBrainThought[], semanticThoughts: OpenBrainThought[]): OpenBrainThought[] {
const merged: OpenBrainThought[] = [];
const seenIds = new Set<string>();
const seenFingerprints = new Set<string>();
for (const thought of [...recentThoughts, ...semanticThoughts]) {
const id = thought.id.trim();
const fingerprint = thoughtFingerprint(thought);
if (id.length > 0 && seenIds.has(id)) {
continue;
}
if (seenFingerprints.has(fingerprint)) {
continue;
}
if (id.length > 0) {
seenIds.add(id);
}
seenFingerprints.add(fingerprint);
merged.push(thought);
}
return merged;
}
private filterSessionThoughts(thoughts: OpenBrainThought[], sessionId: string): OpenBrainThought[] {
return thoughts.filter((thought) => {
const thoughtSessionId = thought.metadata?.sessionId;
if (typeof thoughtSessionId === "string" && thoughtSessionId.length > 0) {
return thoughtSessionId === sessionId;
}
return thought.source === this.sourceForSession(sessionId);
});
}
private toAgentMessage(thought: OpenBrainThought, index: number): AgentMessage {
return {
role: normalizeRole(thought.metadata?.role),
content: thought.content,
timestamp: thoughtTimestamp(thought, this.now() + index),
};
}
private trimToBudget(messages: AgentMessage[], tokenBudget: number): AgentMessage[] {
if (messages.length === 0 || tokenBudget <= 0) {
return [];
}
let total = 0;
const budgeted: AgentMessage[] = [];
for (let i = messages.length - 1; i >= 0; i -= 1) {
const message = messages[i];
if (message === undefined) {
continue;
}
const tokens = estimateTextTokens(serializeContent(message.content));
if (total + tokens > tokenBudget) {
break;
}
total += tokens;
budgeted.unshift(message);
}
if (budgeted.length === 0) {
const lastMessage = messages[messages.length - 1];
return lastMessage === undefined ? [] : [lastMessage];
}
return budgeted;
}
private estimateTokensForMessages(messages: AgentMessage[]): number {
return messages.reduce((total, message) => {
return total + estimateTextTokens(serializeContent(message.content));
}, 0);
}
private estimateTokensForThoughts(thoughts: OpenBrainThought[]): number {
return thoughts.reduce((total, thought) => total + estimateTextTokens(thought.content), 0);
}
private buildSummary(params: {
sessionId: string;
thoughts: OpenBrainThought[];
customInstructions?: string;
}): string {
const lines = params.thoughts.map((thought) => {
const role = normalizeRole(thought.metadata?.role);
const content = truncateLine(thought.content.replace(/\s+/g, " ").trim(), 180);
return `- ${role}: ${content}`;
});
const header = `Context summary for session ${params.sessionId}`;
const instruction =
params.customInstructions !== undefined && params.customInstructions.trim().length > 0
? `Custom instructions: ${params.customInstructions.trim()}\n`
: "";
return `${header}\n${instruction}${lines.join("\n")}`;
}
private selectSummaryThoughts(thoughts: OpenBrainThought[]): OpenBrainThought[] {
const ordered = [...thoughts].sort((a, b) => {
return thoughtTimestamp(a, 0) - thoughtTimestamp(b, 0);
});
const maxLines = Math.min(ordered.length, 10);
return ordered.slice(Math.max(ordered.length - maxLines, 0));
}
private buildSubagentSeedContent(params: {
parentSessionKey: string;
childSessionKey: string;
thoughts: OpenBrainThought[];
}): string {
const lines = params.thoughts.slice(-5).map((thought) => {
const role = normalizeRole(thought.metadata?.role);
return `- ${role}: ${truncateLine(thought.content.replace(/\s+/g, " ").trim(), 160)}`;
});
const contextBlock = lines.length > 0 ? lines.join("\n") : "- (no prior context found)";
return [
`Subagent context seed`,
`Parent session: ${params.parentSessionKey}`,
`Child session: ${params.childSessionKey}`,
contextBlock,
].join("\n");
}
private buildSubagentResultSummary(params: {
childSessionKey: string;
reason: SubagentEndReason;
thoughts: OpenBrainThought[];
}): string {
const lines = params.thoughts.slice(-5).map((thought) => {
const role = normalizeRole(thought.metadata?.role);
return `- ${role}: ${truncateLine(thought.content.replace(/\s+/g, " ").trim(), 160)}`;
});
const contextBlock = lines.length > 0 ? lines.join("\n") : "- (no child messages found)";
return [
`Subagent ended (${params.reason})`,
`Child session: ${params.childSessionKey}`,
contextBlock,
].join("\n");
}
private sourceForSession(sessionId: string): string {
return `${this.getConfig().source}:${sessionId}`;
}
private nextTurn(sessionId: string): number {
const next = this.sessionTurns.get(sessionId) ?? 0;
this.sessionTurns.set(sessionId, next + 1);
return next;
}
private getClient(): OpenBrainClientLike {
if (this.client !== undefined) {
return this.client;
}
const config = this.getConfig();
this.client =
this.createClientFn?.(config) ??
new OpenBrainClient({
baseUrl: config.baseUrl,
apiKey: config.apiKey,
});
return this.client;
}
private getConfig(): ResolvedOpenBrainContextEngineConfig {
if (this.config !== undefined) {
return this.config;
}
const raw = isRecord(this.rawConfig) ? this.rawConfig : {};
const baseUrl = typeof raw.baseUrl === "string" ? raw.baseUrl.trim() : "";
if (baseUrl.length === 0) {
throw new OpenBrainConfigError("Missing required OpenBrain config: baseUrl");
}
const apiKey = typeof raw.apiKey === "string" ? raw.apiKey.trim() : "";
if (apiKey.length === 0) {
throw new OpenBrainConfigError("Missing required OpenBrain config: apiKey");
}
this.config = {
baseUrl,
apiKey,
recentMessages: parsePositiveInteger(raw.recentMessages, 20),
semanticSearchLimit: parsePositiveInteger(raw.semanticSearchLimit, 10),
source: typeof raw.source === "string" && raw.source.trim().length > 0 ? raw.source.trim() : "openclaw",
subagentRecentMessages: parsePositiveInteger(raw.subagentRecentMessages, 8),
};
return this.config;
}
private assertNotDisposed(): void {
if (this.disposed) {
throw new Error("OpenBrainContextEngine has already been disposed");
}
}
}

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@@ -1,40 +0,0 @@
export class OpenBrainError extends Error {
constructor(message: string, cause?: unknown) {
super(message);
this.name = "OpenBrainError";
if (cause !== undefined) {
(this as Error & { cause?: unknown }).cause = cause;
}
}
}
export class OpenBrainConfigError extends OpenBrainError {
constructor(message: string) {
super(message);
this.name = "OpenBrainConfigError";
}
}
export class OpenBrainHttpError extends OpenBrainError {
readonly status: number;
readonly endpoint: string;
readonly responseBody: string | undefined;
constructor(params: { endpoint: string; status: number; responseBody: string | undefined }) {
super(`OpenBrain request failed (${params.status}) for ${params.endpoint}`);
this.name = "OpenBrainHttpError";
this.status = params.status;
this.endpoint = params.endpoint;
this.responseBody = params.responseBody;
}
}
export class OpenBrainRequestError extends OpenBrainError {
readonly endpoint: string;
constructor(params: { endpoint: string; cause: unknown }) {
super(`OpenBrain request failed for ${params.endpoint}`, params.cause);
this.name = "OpenBrainRequestError";
this.endpoint = params.endpoint;
}
}

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@@ -1,31 +0,0 @@
import {
OPENBRAIN_CONTEXT_ENGINE_ID,
OPENBRAIN_PLUGIN_ID,
OPENBRAIN_PLUGIN_VERSION,
} from "./constants.js";
import { OpenBrainContextEngine } from "./engine.js";
import type { OpenClawPluginApi } from "./openclaw-types.js";
export { OPENBRAIN_CONTEXT_ENGINE_ID } from "./constants.js";
export { OpenBrainContextEngine } from "./engine.js";
export { OpenBrainConfigError, OpenBrainHttpError, OpenBrainRequestError } from "./errors.js";
export { OpenBrainClient } from "./openbrain-client.js";
export type { OpenBrainContextEngineConfig } from "./engine.js";
export type { OpenClawPluginApi } from "./openclaw-types.js";
export function register(api: OpenClawPluginApi): void {
api.registerContextEngine(OPENBRAIN_CONTEXT_ENGINE_ID, () => {
const deps = api.logger !== undefined ? { logger: api.logger } : undefined;
return new OpenBrainContextEngine(api.pluginConfig, deps);
});
}
const plugin = {
id: OPENBRAIN_PLUGIN_ID,
name: "OpenBrain Context Engine",
version: OPENBRAIN_PLUGIN_VERSION,
kind: "context-engine",
register,
};
export default plugin;

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@@ -1,333 +0,0 @@
import { OpenBrainConfigError, OpenBrainHttpError, OpenBrainRequestError } from "./errors.js";
export type OpenBrainThoughtMetadata = Record<string, unknown> & {
sessionId?: string;
turn?: number;
role?: string;
type?: string;
};
export type OpenBrainThought = {
id: string;
content: string;
source: string;
metadata: OpenBrainThoughtMetadata | undefined;
createdAt: string | undefined;
updatedAt: string | undefined;
score: number | undefined;
[key: string]: unknown;
};
export type OpenBrainThoughtInput = {
content: string;
source: string;
metadata?: OpenBrainThoughtMetadata;
};
export type OpenBrainSearchInput = {
query: string;
limit: number;
source?: string;
};
export type OpenBrainClientOptions = {
baseUrl: string;
apiKey: string;
fetchImpl?: typeof fetch;
};
export interface OpenBrainClientLike {
createThought(input: OpenBrainThoughtInput): Promise<OpenBrainThought>;
search(input: OpenBrainSearchInput): Promise<OpenBrainThought[]>;
listRecent(input: { limit: number; source?: string }): Promise<OpenBrainThought[]>;
updateThought(
id: string,
payload: { content?: string; metadata?: OpenBrainThoughtMetadata },
): Promise<OpenBrainThought>;
deleteThought(id: string): Promise<void>;
deleteThoughts(params: { source?: string; metadataId?: string }): Promise<void>;
}
function isRecord(value: unknown): value is Record<string, unknown> {
return typeof value === "object" && value !== null;
}
function readString(record: Record<string, unknown>, key: string): string | undefined {
const value = record[key];
return typeof value === "string" ? value : undefined;
}
function readNumber(record: Record<string, unknown>, key: string): number | undefined {
const value = record[key];
return typeof value === "number" ? value : undefined;
}
function normalizeBaseUrl(baseUrl: string): string {
const normalized = baseUrl.trim().replace(/\/+$/, "");
if (normalized.length === 0) {
throw new OpenBrainConfigError("Missing required OpenBrain config: baseUrl");
}
return normalized;
}
function normalizeApiKey(apiKey: string): string {
const normalized = apiKey.trim();
if (normalized.length === 0) {
throw new OpenBrainConfigError("Missing required OpenBrain config: apiKey");
}
return normalized;
}
function normalizeHeaders(headers: unknown): Record<string, string> {
if (headers === undefined) {
return {};
}
if (Array.isArray(headers)) {
const normalized: Record<string, string> = {};
for (const pair of headers) {
if (!Array.isArray(pair) || pair.length < 2) {
continue;
}
const key = pair[0];
const value = pair[1];
if (typeof key !== "string" || typeof value !== "string") {
continue;
}
normalized[key] = value;
}
return normalized;
}
if (headers instanceof Headers) {
const normalized: Record<string, string> = {};
for (const [key, value] of headers.entries()) {
normalized[key] = value;
}
return normalized;
}
if (!isRecord(headers)) {
return {};
}
const normalized: Record<string, string> = {};
for (const [key, value] of Object.entries(headers)) {
if (typeof value === "string") {
normalized[key] = value;
continue;
}
if (Array.isArray(value)) {
normalized[key] = value.join(", ");
}
}
return normalized;
}
async function readResponseBody(response: Response): Promise<string | undefined> {
try {
const body = await response.text();
return body.length > 0 ? body : undefined;
} catch {
return undefined;
}
}
export class OpenBrainClient implements OpenBrainClientLike {
private readonly baseUrl: string;
private readonly apiKey: string;
private readonly fetchImpl: typeof fetch;
constructor(options: OpenBrainClientOptions) {
this.baseUrl = normalizeBaseUrl(options.baseUrl);
this.apiKey = normalizeApiKey(options.apiKey);
this.fetchImpl = options.fetchImpl ?? fetch;
}
async createThought(input: OpenBrainThoughtInput): Promise<OpenBrainThought> {
const payload = await this.request<unknown>("/v1/thoughts", {
method: "POST",
body: JSON.stringify(input),
});
return this.extractThought(payload);
}
async search(input: OpenBrainSearchInput): Promise<OpenBrainThought[]> {
const payload = await this.request<unknown>("/v1/search", {
method: "POST",
body: JSON.stringify(input),
});
return this.extractThoughtArray(payload);
}
async listRecent(input: { limit: number; source?: string }): Promise<OpenBrainThought[]> {
const params = new URLSearchParams({
limit: String(input.limit),
});
if (input.source !== undefined && input.source.length > 0) {
params.set("source", input.source);
}
const payload = await this.request<unknown>(`/v1/thoughts/recent?${params.toString()}`, {
method: "GET",
});
return this.extractThoughtArray(payload);
}
async updateThought(
id: string,
payload: { content?: string; metadata?: OpenBrainThoughtMetadata },
): Promise<OpenBrainThought> {
const responsePayload = await this.request<unknown>(`/v1/thoughts/${encodeURIComponent(id)}`, {
method: "PATCH",
body: JSON.stringify(payload),
});
return this.extractThought(responsePayload);
}
async deleteThought(id: string): Promise<void> {
await this.request<unknown>(`/v1/thoughts/${encodeURIComponent(id)}`, {
method: "DELETE",
});
}
async deleteThoughts(params: { source?: string; metadataId?: string }): Promise<void> {
const query = new URLSearchParams();
if (params.source !== undefined && params.source.length > 0) {
query.set("source", params.source);
}
if (params.metadataId !== undefined && params.metadataId.length > 0) {
query.set("metadata_id", params.metadataId);
}
const suffix = query.size > 0 ? `?${query.toString()}` : "";
await this.request<unknown>(`/v1/thoughts${suffix}`, {
method: "DELETE",
});
}
private async request<T>(endpoint: string, init: RequestInit): Promise<T> {
const headers = normalizeHeaders(init.headers);
headers.Authorization = `Bearer ${this.apiKey}`;
if (init.body !== undefined && headers["Content-Type"] === undefined) {
headers["Content-Type"] = "application/json";
}
const url = `${this.baseUrl}${endpoint}`;
let response: Response;
try {
response = await this.fetchImpl(url, {
...init,
headers,
});
} catch (error) {
throw new OpenBrainRequestError({ endpoint, cause: error });
}
if (!response.ok) {
throw new OpenBrainHttpError({
endpoint,
status: response.status,
responseBody: await readResponseBody(response),
});
}
if (response.status === 204) {
return undefined as T;
}
const contentType = response.headers.get("content-type") ?? "";
if (!contentType.toLowerCase().includes("application/json")) {
return undefined as T;
}
return (await response.json()) as T;
}
private extractThoughtArray(payload: unknown): OpenBrainThought[] {
if (Array.isArray(payload)) {
return payload.map((item) => this.normalizeThought(item));
}
if (!isRecord(payload)) {
return [];
}
const candidates = [payload.thoughts, payload.data, payload.results, payload.items];
for (const candidate of candidates) {
if (Array.isArray(candidate)) {
return candidate.map((item) => this.normalizeThought(item));
}
}
return [];
}
private extractThought(payload: unknown): OpenBrainThought {
if (isRecord(payload)) {
const nested = payload.thought;
if (nested !== undefined) {
return this.normalizeThought(nested);
}
const data = payload.data;
if (data !== undefined && !Array.isArray(data)) {
return this.normalizeThought(data);
}
}
return this.normalizeThought(payload);
}
private normalizeThought(value: unknown): OpenBrainThought {
if (!isRecord(value)) {
return {
id: "",
content: "",
source: "",
metadata: undefined,
createdAt: undefined,
updatedAt: undefined,
score: undefined,
};
}
const metadataValue = value.metadata;
const metadata = isRecord(metadataValue)
? ({ ...metadataValue } as OpenBrainThoughtMetadata)
: undefined;
const id = readString(value, "id") ?? readString(value, "thought_id") ?? "";
const content =
readString(value, "content") ??
readString(value, "text") ??
(value.content === undefined ? "" : String(value.content));
const source = readString(value, "source") ?? "";
const createdAt = readString(value, "createdAt") ?? readString(value, "created_at");
const updatedAt = readString(value, "updatedAt") ?? readString(value, "updated_at");
const score = readNumber(value, "score");
return {
...value,
id,
content,
source,
metadata,
createdAt,
updatedAt,
score,
};
}
}
export { normalizeApiKey, normalizeBaseUrl };

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@@ -1,128 +0,0 @@
export type AgentMessageRole = "user" | "assistant" | "tool" | "system" | string;
export type AgentMessage = {
role: AgentMessageRole;
content: unknown;
timestamp?: number;
[key: string]: unknown;
};
export type AssembleResult = {
messages: AgentMessage[];
estimatedTokens: number;
systemPromptAddition?: string;
};
export type CompactResult = {
ok: boolean;
compacted: boolean;
reason?: string;
result?: {
summary?: string;
firstKeptEntryId?: string;
tokensBefore: number;
tokensAfter?: number;
details?: unknown;
};
};
export type IngestResult = {
ingested: boolean;
};
export type IngestBatchResult = {
ingestedCount: number;
};
export type BootstrapResult = {
bootstrapped: boolean;
importedMessages?: number;
reason?: string;
};
export type ContextEngineInfo = {
id: string;
name: string;
version?: string;
ownsCompaction?: boolean;
};
export type SubagentSpawnPreparation = {
rollback: () => void | Promise<void>;
};
export type SubagentEndReason = "deleted" | "completed" | "swept" | "released";
export interface ContextEngine {
readonly info: ContextEngineInfo;
bootstrap?(params: { sessionId: string; sessionFile: string }): Promise<BootstrapResult>;
ingest(params: {
sessionId: string;
message: AgentMessage;
isHeartbeat?: boolean;
}): Promise<IngestResult>;
ingestBatch?(params: {
sessionId: string;
messages: AgentMessage[];
isHeartbeat?: boolean;
}): Promise<IngestBatchResult>;
afterTurn?(params: {
sessionId: string;
sessionFile: string;
messages: AgentMessage[];
prePromptMessageCount: number;
autoCompactionSummary?: string;
isHeartbeat?: boolean;
tokenBudget?: number;
legacyCompactionParams?: Record<string, unknown>;
}): Promise<void>;
assemble(params: {
sessionId: string;
messages: AgentMessage[];
tokenBudget?: number;
}): Promise<AssembleResult>;
compact(params: {
sessionId: string;
sessionFile: string;
tokenBudget?: number;
force?: boolean;
currentTokenCount?: number;
compactionTarget?: "budget" | "threshold";
customInstructions?: string;
legacyParams?: Record<string, unknown>;
}): Promise<CompactResult>;
prepareSubagentSpawn?(params: {
parentSessionKey: string;
childSessionKey: string;
ttlMs?: number;
}): Promise<SubagentSpawnPreparation | undefined>;
onSubagentEnded?(params: {
childSessionKey: string;
reason: SubagentEndReason;
}): Promise<void>;
dispose?(): Promise<void>;
}
export type ContextEngineFactory = () => ContextEngine | Promise<ContextEngine>;
export type PluginLogger = {
debug?: (...args: unknown[]) => void;
info?: (...args: unknown[]) => void;
warn?: (...args: unknown[]) => void;
error?: (...args: unknown[]) => void;
};
export type OpenClawPluginApi = {
pluginConfig?: Record<string, unknown>;
logger?: PluginLogger;
registerContextEngine: (id: string, factory: ContextEngineFactory) => void;
};

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@@ -1,414 +0,0 @@
import { describe, expect, it, vi } from "vitest";
import { OpenBrainConfigError } from "../src/errors.js";
import { OpenBrainContextEngine } from "../src/engine.js";
import type { AgentMessage } from "../src/openclaw-types.js";
import type {
OpenBrainClientLike,
OpenBrainThought,
OpenBrainThoughtInput,
} from "../src/openbrain-client.js";
function makeThought(
id: string,
content: string,
sessionId: string,
role: string,
createdAt: string,
): OpenBrainThought {
return {
id,
content,
source: `openclaw:${sessionId}`,
metadata: {
sessionId,
role,
type: "message",
},
createdAt,
updatedAt: undefined,
score: undefined,
};
}
function makeMockClient(): OpenBrainClientLike {
return {
createThought: vi.fn(async (input: OpenBrainThoughtInput) => ({
id: `thought-${Math.random().toString(36).slice(2)}`,
content: input.content,
source: input.source,
metadata: input.metadata,
createdAt: new Date().toISOString(),
updatedAt: undefined,
score: undefined,
})),
search: vi.fn(async () => []),
listRecent: vi.fn(async () => []),
updateThought: vi.fn(async (id, payload) => ({
id,
content: payload.content ?? "",
source: "openclaw:session",
metadata: payload.metadata,
createdAt: new Date().toISOString(),
updatedAt: undefined,
score: undefined,
})),
deleteThought: vi.fn(async () => undefined),
deleteThoughts: vi.fn(async () => undefined),
};
}
const sessionId = "session-main";
const userMessage: AgentMessage = {
role: "user",
content: "What did we decide yesterday?",
timestamp: Date.now(),
};
describe("OpenBrainContextEngine", () => {
it("throws OpenBrainConfigError at bootstrap when baseUrl/apiKey are missing", async () => {
const engine = new OpenBrainContextEngine({});
await expect(
engine.bootstrap({
sessionId,
sessionFile: "/tmp/session.json",
}),
).rejects.toBeInstanceOf(OpenBrainConfigError);
});
it("ingests messages with session metadata", async () => {
const mockClient = makeMockClient();
const engine = new OpenBrainContextEngine(
{
baseUrl: "https://brain.example.com",
apiKey: "secret",
source: "openclaw",
},
{
createClient: () => mockClient,
},
);
await engine.bootstrap({ sessionId, sessionFile: "/tmp/session.json" });
const result = await engine.ingest({ sessionId, message: userMessage });
expect(result.ingested).toBe(true);
expect(mockClient.createThought).toHaveBeenCalledWith(
expect.objectContaining({
source: "openclaw:session-main",
metadata: expect.objectContaining({
sessionId,
role: "user",
type: "message",
turn: 0,
}),
}),
);
});
it("ingests batches and returns ingested count", async () => {
const mockClient = makeMockClient();
const engine = new OpenBrainContextEngine(
{
baseUrl: "https://brain.example.com",
apiKey: "secret",
},
{ createClient: () => mockClient },
);
await engine.bootstrap({ sessionId, sessionFile: "/tmp/session.json" });
const result = await engine.ingestBatch({
sessionId,
messages: [
{ role: "user", content: "one", timestamp: 1 },
{ role: "assistant", content: "two", timestamp: 2 },
],
});
expect(result.ingestedCount).toBe(2);
expect(mockClient.createThought).toHaveBeenCalledTimes(2);
});
it("ingests batches in parallel chunks of five", async () => {
const mockClient = makeMockClient();
let inFlight = 0;
let maxInFlight = 0;
let createdCount = 0;
vi.mocked(mockClient.createThought).mockImplementation(async (input: OpenBrainThoughtInput) => {
inFlight += 1;
maxInFlight = Math.max(maxInFlight, inFlight);
await new Promise((resolve) => {
setTimeout(resolve, 20);
});
inFlight -= 1;
createdCount += 1;
return {
id: `thought-${createdCount}`,
content: input.content,
source: input.source,
metadata: input.metadata,
createdAt: new Date().toISOString(),
updatedAt: undefined,
score: undefined,
};
});
const engine = new OpenBrainContextEngine(
{
baseUrl: "https://brain.example.com",
apiKey: "secret",
},
{ createClient: () => mockClient },
);
await engine.bootstrap({ sessionId, sessionFile: "/tmp/session.json" });
const result = await engine.ingestBatch({
sessionId,
messages: Array.from({ length: 10 }, (_, index) => ({
role: index % 2 === 0 ? "user" : "assistant",
content: `message-${index + 1}`,
timestamp: index + 1,
})),
});
expect(result.ingestedCount).toBe(10);
expect(maxInFlight).toBe(5);
expect(mockClient.createThought).toHaveBeenCalledTimes(10);
});
it("assembles context from recent + semantic search, deduped and budget-aware", async () => {
const mockClient = makeMockClient();
vi.mocked(mockClient.listRecent).mockResolvedValue([
makeThought("t1", "recent user context", sessionId, "user", "2026-03-06T12:00:00.000Z"),
makeThought(
"t2",
"recent assistant context",
sessionId,
"assistant",
"2026-03-06T12:01:00.000Z",
),
]);
vi.mocked(mockClient.search).mockResolvedValue([
makeThought(
"t2",
"recent assistant context",
sessionId,
"assistant",
"2026-03-06T12:01:00.000Z",
),
makeThought("t3", "semantic match", sessionId, "assistant", "2026-03-06T12:02:00.000Z"),
]);
const engine = new OpenBrainContextEngine(
{
baseUrl: "https://brain.example.com",
apiKey: "secret",
recentMessages: 10,
semanticSearchLimit: 10,
},
{ createClient: () => mockClient },
);
await engine.bootstrap({ sessionId, sessionFile: "/tmp/session.json" });
const result = await engine.assemble({
sessionId,
messages: [
{
role: "user",
content: "Find the semantic context",
timestamp: Date.now(),
},
],
tokenBudget: 40,
});
expect(mockClient.search).toHaveBeenCalledWith(
expect.objectContaining({
query: "Find the semantic context",
limit: 10,
}),
);
expect(result.estimatedTokens).toBeLessThanOrEqual(40);
expect(result.messages.map((message) => String(message.content))).toEqual([
"recent user context",
"recent assistant context",
"semantic match",
]);
});
it("compact archives a summary thought and deletes summarized inputs", async () => {
const mockClient = makeMockClient();
vi.mocked(mockClient.listRecent).mockResolvedValue(
Array.from({ length: 12 }, (_, index) => {
return makeThought(
`t${index + 1}`,
`message ${index + 1}`,
sessionId,
index % 2 === 0 ? "user" : "assistant",
`2026-03-06T12:${String(index).padStart(2, "0")}:00.000Z`,
);
}),
);
const engine = new OpenBrainContextEngine(
{
baseUrl: "https://brain.example.com",
apiKey: "secret",
},
{ createClient: () => mockClient },
);
await engine.bootstrap({ sessionId, sessionFile: "/tmp/session.json" });
const result = await engine.compact({
sessionId,
sessionFile: "/tmp/session.json",
tokenBudget: 128,
});
expect(result.ok).toBe(true);
expect(result.compacted).toBe(true);
expect(mockClient.createThought).toHaveBeenCalledWith(
expect.objectContaining({
source: "openclaw:session-main",
metadata: expect.objectContaining({
sessionId,
type: "summary",
}),
}),
);
const deletedIds = vi
.mocked(mockClient.deleteThought)
.mock.calls.map(([id]) => id)
.sort((left, right) => left.localeCompare(right));
expect(deletedIds).toEqual([
"t10",
"t11",
"t12",
"t3",
"t4",
"t5",
"t6",
"t7",
"t8",
"t9",
]);
});
it("stops trimming once the newest message exceeds budget", async () => {
const mockClient = makeMockClient();
const oversizedNewest = "z".repeat(400);
vi.mocked(mockClient.listRecent).mockResolvedValue([
makeThought("t1", "small older message", sessionId, "assistant", "2026-03-06T12:00:00.000Z"),
makeThought("t2", oversizedNewest, sessionId, "assistant", "2026-03-06T12:01:00.000Z"),
]);
const engine = new OpenBrainContextEngine(
{
baseUrl: "https://brain.example.com",
apiKey: "secret",
},
{ createClient: () => mockClient },
);
await engine.bootstrap({ sessionId, sessionFile: "/tmp/session.json" });
const result = await engine.assemble({
sessionId,
messages: [
{
role: "user",
content: "query",
timestamp: Date.now(),
},
],
tokenBudget: 12,
});
expect(result.messages.map((message) => String(message.content))).toEqual([oversizedNewest]);
});
it("prepares subagent spawn and rollback deletes seeded context", async () => {
const mockClient = makeMockClient();
vi.mocked(mockClient.listRecent).mockResolvedValue([
makeThought("t1", "parent context", sessionId, "assistant", "2026-03-06T12:00:00.000Z"),
]);
vi.mocked(mockClient.createThought).mockResolvedValue({
id: "seed-thought",
content: "seed",
source: "openclaw:child",
metadata: undefined,
createdAt: "2026-03-06T12:01:00.000Z",
updatedAt: undefined,
score: undefined,
});
const engine = new OpenBrainContextEngine(
{
baseUrl: "https://brain.example.com",
apiKey: "secret",
},
{ createClient: () => mockClient },
);
await engine.bootstrap({ sessionId, sessionFile: "/tmp/session.json" });
const prep = await engine.prepareSubagentSpawn({
parentSessionKey: sessionId,
childSessionKey: "child-session",
});
expect(prep).toBeDefined();
expect(mockClient.createThought).toHaveBeenCalledWith(
expect.objectContaining({
source: "openclaw:child-session",
}),
);
await prep?.rollback();
expect(mockClient.deleteThought).toHaveBeenCalledWith("seed-thought");
});
it("stores child outcome back into parent on subagent end", async () => {
const mockClient = makeMockClient();
vi.mocked(mockClient.listRecent)
.mockResolvedValueOnce([
makeThought("p1", "parent context", sessionId, "assistant", "2026-03-06T12:00:00.000Z"),
])
.mockResolvedValueOnce([
makeThought("c1", "child result detail", "child-session", "assistant", "2026-03-06T12:05:00.000Z"),
]);
const engine = new OpenBrainContextEngine(
{
baseUrl: "https://brain.example.com",
apiKey: "secret",
},
{ createClient: () => mockClient },
);
await engine.bootstrap({ sessionId, sessionFile: "/tmp/session.json" });
await engine.prepareSubagentSpawn({
parentSessionKey: sessionId,
childSessionKey: "child-session",
});
await engine.onSubagentEnded({
childSessionKey: "child-session",
reason: "completed",
});
expect(mockClient.createThought).toHaveBeenLastCalledWith(
expect.objectContaining({
source: "openclaw:session-main",
metadata: expect.objectContaining({
type: "subagent-result",
sessionId,
}),
}),
);
});
});

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@@ -1,81 +0,0 @@
import { describe, expect, it, vi } from "vitest";
import { OpenBrainConfigError, OpenBrainHttpError } from "../src/errors.js";
import { OpenBrainClient } from "../src/openbrain-client.js";
function jsonResponse(body: unknown, init?: ResponseInit): Response {
return new Response(JSON.stringify(body), {
status: init?.status ?? 200,
headers: {
"content-type": "application/json",
...(init?.headers ?? {}),
},
});
}
describe("OpenBrainClient", () => {
it("sends bearer auth and normalized URL for createThought", async () => {
const fetchMock = vi.fn(async () =>
jsonResponse({
id: "thought-1",
content: "hello",
source: "openclaw:main",
}),
);
const client = new OpenBrainClient({
baseUrl: "https://brain.example.com/",
apiKey: "secret",
fetchImpl: fetchMock as unknown as typeof fetch,
});
await client.createThought({
content: "hello",
source: "openclaw:main",
metadata: { sessionId: "session-1" },
});
expect(fetchMock).toHaveBeenCalledTimes(1);
const firstCall = fetchMock.mock.calls[0];
expect(firstCall).toBeDefined();
if (firstCall === undefined) {
throw new Error("Expected fetch call arguments");
}
const [url, init] = firstCall as unknown as [string, RequestInit];
expect(url).toBe("https://brain.example.com/v1/thoughts");
expect(init.method).toBe("POST");
expect(init.headers).toMatchObject({
Authorization: "Bearer secret",
"Content-Type": "application/json",
});
});
it("throws OpenBrainHttpError on non-2xx responses", async () => {
const fetchMock = vi.fn(async () =>
jsonResponse({ error: "unauthorized" }, { status: 401 }),
);
const client = new OpenBrainClient({
baseUrl: "https://brain.example.com",
apiKey: "secret",
fetchImpl: fetchMock as unknown as typeof fetch,
});
await expect(client.listRecent({ limit: 5, source: "openclaw:main" })).rejects.toBeInstanceOf(
OpenBrainHttpError,
);
await expect(client.listRecent({ limit: 5, source: "openclaw:main" })).rejects.toMatchObject({
status: 401,
});
});
it("throws OpenBrainConfigError when initialized without baseUrl or apiKey", () => {
expect(
() => new OpenBrainClient({ baseUrl: "", apiKey: "secret", fetchImpl: fetch }),
).toThrow(OpenBrainConfigError);
expect(
() => new OpenBrainClient({ baseUrl: "https://brain.example.com", apiKey: "", fetchImpl: fetch }),
).toThrow(OpenBrainConfigError);
});
});

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@@ -1,30 +0,0 @@
import { describe, expect, it, vi } from "vitest";
import { OPENBRAIN_CONTEXT_ENGINE_ID, register } from "../src/index.js";
describe("plugin register()", () => {
it("registers the openbrain context engine factory", async () => {
const registerContextEngine = vi.fn();
register({
registerContextEngine,
pluginConfig: {
baseUrl: "https://brain.example.com",
apiKey: "secret",
},
logger: {
debug: vi.fn(),
info: vi.fn(),
warn: vi.fn(),
error: vi.fn(),
},
});
expect(registerContextEngine).toHaveBeenCalledTimes(1);
const [id, factory] = registerContextEngine.mock.calls[0] as [string, () => Promise<unknown> | unknown];
expect(id).toBe(OPENBRAIN_CONTEXT_ENGINE_ID);
const engine = await factory();
expect(engine).toHaveProperty("info.id", OPENBRAIN_CONTEXT_ENGINE_ID);
});
});

View File

@@ -1,9 +0,0 @@
import { describe, expect, it } from "vitest";
import { OPENBRAIN_CONTEXT_ENGINE_ID } from "../src/index.js";
describe("project scaffold", () => {
it("exports openbrain context engine id", () => {
expect(OPENBRAIN_CONTEXT_ENGINE_ID).toBe("openbrain");
});
});

View File

@@ -1,27 +0,0 @@
{
"compilerOptions": {
"target": "ES2022",
"module": "NodeNext",
"moduleResolution": "NodeNext",
"lib": ["ES2022"],
"strict": true,
"noUncheckedIndexedAccess": true,
"exactOptionalPropertyTypes": true,
"isolatedModules": true,
"declaration": true,
"declarationMap": true,
"sourceMap": true,
"outDir": "dist",
"rootDir": ".",
"types": ["node", "vitest/globals"],
"skipLibCheck": true,
"esModuleInterop": true,
"forceConsistentCasingInFileNames": true,
"baseUrl": ".",
"paths": {
"openclaw/plugin-sdk": ["../openclaw-fork/src/plugin-sdk/index.ts"]
}
},
"include": ["src/**/*.ts", "tests/**/*.ts"],
"exclude": ["dist", "node_modules"]
}

View File

@@ -1,8 +0,0 @@
import { defineConfig } from "vitest/config";
export default defineConfig({
test: {
environment: "node",
include: ["tests/**/*.test.ts"],
},
});