popu2do/dsh-call-session

dsh-call-session is an in-process cross-session communication and workspace shared blackboard plugin built explicitly for the DeepSeek Harness (DSH) runtime. It is installed into the DSH Web profile with the command dsh plugin --profile web add dsh-call-session, after which the dsh plugin --profile web list and dsh plugin --profile web remove dsh-call-session commands manage its lifecycle, and it loads as a Cordis v4.x plugin so DSH can mount its tools. The plugin exposes six tools — session_create, session_call, session_query, board_post, board_list, and board_clear — and also adds a Canvas tab inside the DSH Web session view that visualizes workspace columns, running and idle session nodes, blackboard entries with TTL countdowns, and directional call traces as a topology diagram with hover-highlighted one-hop subgraphs and a double-click read-only inspector drawer.

Typical workflows rely on plain natural-language prompts in chat, letting the agent invoke tools automatically: a user can ask the agent to hand off a task summary to a named session via session_call, to publish bulky review conclusions to the board with board_post and obtain a postId that peers fetch on demand with board_list, or to spawn a long-running peer session with session_create that inherits model specifications and presets from the current workspace. The intended audience is teams running multiple independent top-level DSH sessions that need to coordinate directly, share large artifacts without context-window bloat, or observe multi-agent collaboration state. The README positions the plugin as a complement, not a replacement, to DSH's built-in subagent, recommending subagent for ephemeral scoped exploration and dsh-call-session for peer-to-peer messaging and shared-board scenarios.

Dependencies and limits are tightly constrained: Node.js ≥20.0.0 (verified on 20.x and 22.x), TypeScript strict mode, Cordis ^4.0.2, and DeepSeek Harness ≥0.1.1-rc.1 with explicit verification on 0.1.2-rc.1, 0.1.5-rc.1, and 0.1.5-rc.2. Out-of-the-box defaults run the plugin immediately, while optional overrides live in ~/.dsh/profiles/web/cordis.patch.yml and cover enabled (boolean, true), debounceMs (300), maxCapacity (200 board entries), telemetryCapacity (200 call traces retained in canvas buffer), and locale (auto, zh, or en). Important caveat for first-time users — the --profile flag must follow the plugin subcommand (for example dsh plugin --profile web ...), and the Canvas is strictly read-only, so all state mutations must originate from the agents themselves; the project is released under the MIT License.