volcengine/OpenViking#examples/dsh-memory-plugin

An installable DeepSeek Harness bundle that adds OpenViking auto-recall, session capture, viking:// URI protection, and model-invocable memory tools.

Requirements

• @deepseek-ai/dsh 0.1.0-rc.6
• Node.js ^22.19.0 or >=24
• A reachable OpenViking server

The bundle has no runtime npm dependencies. Its tool and message structures come from the DSH constructors (defineTool from @deepseek-ai/dsh-tools, createUserMessage from @deepseek-ai/dsh-llm) behind exact-pinned peerDependencies that DSH exposes through its profile fallback at boot time, so the definitions track DSH's contracts instead of hand-built object shapes. It is tested against 0.1.0-rc.6; install that exact DSH release because prerelease package dist-tags are not synchronized across the package family.

Why injection uses pre-step user messages, not the system prompt

Recall and profile context enter through the agent/pre-step waterfall as durable, source-attributed user messages (source: { kind: 'plugin', … }). They are deliberately not added to the system prompt: a DSH preset whose persona declares complete: true (the stock minimal preset does) restores that persona as the sole prompt section after assembly, silently discarding every other contribution — a system-prompt-based memory plugin loses its context under such presets with no error. Pre-step injection also makes each injection a session event that replays, is visible to compaction, and never reaches request/header.

Install

From the OpenViking repository:

dsh plugin --profile default add ./examples/dsh-memory-plugin

Or install the published package:

dsh plugin --profile default add @openviking/dsh-memory-plugin

Confirm that the profile includes the bundle:

dsh --profile default --dump-config

The package patch mounts the runtime inside a Cordis group with an isolated openvikingMemory service.

Configuration

OpenViking credentials use the same resolution order as the other memory plugins:

1. OPENVIKING_* environment variables
2. ~/.openviking/ovcli.conf
3. ~/.openviking/ov.conf

Common environment variables:

Variable	Purpose
OPENVIKING_URL / OPENVIKING_BASE_URL	OpenViking server endpoint
OPENVIKING_API_KEY / OPENVIKING_BEARER_TOKEN	Bearer credential
OPENVIKING_ACCOUNT	Trusted-mode account
OPENVIKING_USER	Trusted-mode user
OPENVIKING_PEER_ID	Explicit actor peer
OPENVIKING_WORKSPACE_PEER	Derive a peer from each DSH session workspace by default
OPENVIKING_RECALL_PEER_SCOPE	all for cross-workspace recall or actor for isolation

The patch can also carry plugin config:

- insert:
    - id: openviking-memory
      name: '@deepseek-ai/cordis-plugin-group'
      group: true
      isolate:
        openvikingMemory: true
      config:
        - id: openviking-memory-runtime
          name: '@openviking/dsh-memory-plugin'
          config:
            endpoint: http://127.0.0.1:1933
            recallTokenBudget: 2000
            scoreThreshold: 0.35
            captureToolResults: false
            commitTokenThreshold: 20000

Behavior

• agent/session-start injects the OpenViking profile and available-memory index through agent.inject().
• agent/pre-step retrieves with the current step input and appends a durable plugin message to that same step.
• session/event captures user, assistant, and optionally tool-result messages without scraping a transcript.
• turn/end checks the OpenViking pending-token threshold and commits when required.
• Failed writes enter the shared OpenViking pending queue for replay at the next session start.
• tools/pre-execute blocks DSH filesystem and shell tools from treating viking:// URIs as local paths.

Each DSH session maps to dsh-<session-id> in OpenViking. Workspace-derived actor peers are resolved per session and sent on every session-specific request.

Tools

The bundle registers:

• viking_search
• viking_read
• viking_browse
• viking_remember
• viking_forget
• viking_add_resource
• viking_archive_expand

viking_forget performs permanent deletion. The calling model should use it only when the user explicitly requests deletion.

Testing

npm ci          # installs the exact-pinned dsh devDependencies the tests exercise
npm test        # node --test *.test.mjs — runs in the repo's PR workflow

live-recall.test.mjs is an opt-in end-to-end gate against a real OpenViking server: it stores a sentinel memory through a session commit, waits for extraction, and asserts recall returns that sentinel — the property no stub can certify. Enable it with OPENVIKING_E2E=1 plus the normal credential chain; it skips otherwise (including in CI until a server secret exists).