@susu-eng/openclaw-gralkor

OpenClaw memory plugin powered by Gralkor — a temporally-aware knowledge-graph memory service (Graphiti + FalkorDB). This package is the OpenClaw harness: it supervises the Gralkor Python server (bundled inside its @susu-eng/gralkor-ts dependency), wires the HTTP API into OpenClaw hooks, and exposes memory_search and memory_add as tools.

For non-OpenClaw uses see @susu-eng/gralkor-ts (the underlying TypeScript adapter this plugin builds on) or the Gralkor monorepo.

Install

openclaw plugins install @susu-eng/openclaw-gralkor --dangerously-force-unsafe-install

(The install-time security scanner flags Gralkor as critical because the Python server that this plugin spawns lives inside @susu-eng/gralkor-ts. Inspect either package's source if you'd like to verify there's nothing weird going on.)

Then configure before enabling:

openclaw config set plugins.entries.openclaw-gralkor.config.dataDir /path/to/gralkor-data
openclaw config set plugins.entries.openclaw-gralkor.config.googleApiKey 'your-key-here'   # or OPENAI/ANTHROPIC/GROQ

openclaw config set --json plugins.allow '["openclaw-gralkor"]'
openclaw config set plugins.entries.openclaw-gralkor.enabled true
openclaw config set plugins.slots.memory openclaw-gralkor
openclaw config set --json tools.alsoAllow '["openclaw-gralkor"]'

Restart OpenClaw. First boot takes 1–2 min while uv sync resolves Graphiti + falkordblite; subsequent starts reuse the venv.

What this plugin does

Three hooks + two tools, all fed by the Gralkor HTTP API:

• before_prompt_build — registers the session's group, scans workspace memory files for new content (MEMORY.md, memory/*.md), and auto-recalls relevant facts which get injected into the prompt.
• agent_end — posts the just-finished turn to /capture as a canonical [{role, content}] message list (user → behaviour(s) → assistant). The Gralkor server owns the capture buffer and flushes on idle (default 5 min) or on explicit session-end. OpenClaw-specific filtering happens here: harness-internal sub-agent runs (e.g. sessionKey === "temp:slug-generator") and synthetic turns (the /new//reset meta-prompt) are skipped, and Conversation info / Sender (untrusted metadata) envelope blocks are stripped from the user message before capture.
• session_end — posts /session_end to flush the session's buffer now instead of waiting for the idle window.
• memory_search tool — calls the same POST /recall path as the before_prompt_build hook. There is no separate slow-search endpoint: manual and auto lookups do identical server work.
• memory_add tool — POST /tools/memory_add. Fire-and-forget; the server queues the add for async Graphiti extraction.

Compared to previous versions of this plugin: the client-side debouncer, flush retry loop, SIGTERM handler, transcript distillation, and LLM interpretation are all gone. Those behaviours moved server-side — this plugin is now a thin lifecycle harness on top of @susu-eng/gralkor-ts.

Session and group identity

• session_id is OpenClaw's sessionKey — required at every boundary. Hooks and tools throw synchronously if ctx.sessionKey is missing or blank; there is no "default" bucket. (OpenClaw's argument shape for hooks and tool factories is documented in OPENCLAW_INTEGRATION_2026-04-02.md.)
• group_id is the sanitised agentId (hyphens replaced with underscores — a RediSearch constraint). Per-agent graph partition; agents never see each other's memory.

before_prompt_build is the single writer of the sessionKey → groupId map. Tools and later hooks look up that map — if session_not_registered errors appear, it means the tool fired before before_prompt_build, which shouldn't happen under normal OpenClaw flow.

Configuration

Set under plugins.entries.openclaw-gralkor.config in ~/.openclaw/openclaw.json. See openclaw.plugin.json for the full schema; the useful knobs are:

• dataDir (required) — writable directory for the Python venv + FalkorDB database.
• autoCapture.enabled (default: true) — post /capture at the end of every agent run.
• autoRecall.enabled (default: true) — call /recall at prompt-build time.
• autoRecall.maxResults (default: 10) — cap on facts injected.
• search.maxResults — cap on facts returned by the memory_search tool.
• llm / embedder — provider + model override (defaults: Gemini).
• googleApiKey / openaiApiKey / anthropicApiKey / groqApiKey — one is required.
• test (default: false) — verbose server-side logging.

Testing

Unit tests use GralkorInMemoryClient from @susu-eng/gralkor-ts/testing — real behaviour, no network, no Python. Full suite runs via pnpm test.

Development

pnpm install
pnpm run build
pnpm run test
openclaw plugins install -l .   # link this local checkout

License

MIT.