Files
deepseek-harness/packages/scaffold/protocol
Tianyi Cui 3fc35c91ff refactor(packages): dissolve ui/ and rename sdk/ to scaffold/
git mv per the regrouping RFC: the five human-collaboration seams and
tui join packages/interaction/, app-boot becomes packages/boot/, and
jsonrpc joins the renamed scaffold/ (formerly sdk/) as its server half
beside client/protocol/create-sdk/helper/scripts/telemetry, whose
folders drop the legacy sdk- prefix. Three new group README triplets
replace the ui/ and sdk/ ones; tsconfig references/paths/globs,
knip keys, vitest globs, gate scripts, catalogs, docs, and the
lockfile follow. Adds the four settled FIXME rename markers
(dsh-sdk-server, dsh-sdk-telemetry, dsh-sdk-helper, dsh-sdk-scripts).

The scaffold folders diverge from their npm names until those renames
land, so tsconfig.base.json maps the three affected names explicitly
beside the group wildcard. Also repairs two pre-existing stale-path
classes the strengthened sweep surfaced: docs/web-styling.md's retired
web-ui host package and type-model spec fixture-literal joins.

app-boot's three Loader-composition specs time out at the default 5s
under full-suite parallel load on this filesystem (pre-existing;
pass isolated with --testTimeout=30000); interaction/scaffold/boot
suites otherwise green (687 passed).
2026-08-09 01:21:12 +08:00
..

@deepseek-ai/dsh-sdk-protocol

English | 中文

The shared wire protocol for the DeepSeek Harness SDK runtime: one newline-delimited JSON-RPC 2.0 transport class plus the named request, result, and notification types both wire ends speak. The package root enumerates the protocol consumer interface; source modules are not exported as deep imports. The server side is the dsh-jsonrpc plugin; clients are dsh-sdk-client (TypeScript) and the Python SDK (which mirrors these shapes but does not import them). A pure library — no plugin, no Config, no registration.

Transport

JsonRpcLineTransport frames JSON-RPC 2.0 over caller-owned byte streams, one compact JSON frame per \n-terminated line. Frames with id and method are requests, id alone is a response, method alone is a notification; malformed JSON lines are ignored. start() attaches stream listeners, close() detaches them and rejects pending requests without destroying the streams. Missing request handlers answer -32601; handler rejections answer -32603 with the error message. An error response rejects the pending request() with JsonRpcResponseError, which preserves the wire code and optional data. JsonRpcTransportPeer is the outbound surface (request/notify) the server class is typed against.

Wire types

types.ts names every payload of the protocol served by HarnessSdkServer:

Direction Method Types
client→server initialize InitializeParamsInitializeResult
client→server session/prompt SessionPromptParamsSessionPromptResult (durable enqueue receipt)
client→server shutdown no params → {}
server→client session.event SessionEventNotification (every session in the runtime, unfiltered)
server→client session.status SessionStatusNotification (whole-agent running/idle transition)
server→client subagent.started SubagentStartedNotification
server→client subagent.finished SubagentFinishedNotification (in-process runs only)

HarnessSdkRequestMap and HarnessSdkNotificationMap index these by method name. SessionPromptResult.messageId identifies the queued UserMessage; it does not identify a later assistant message, turn ending, or prompt result. Clients combine the open-ended session.event stream with agent-wide session.status according to their own activity ownership. InitializeParams.maxTokens is an optional positive safe integer that caps each conversation-model output for SDK-created agents and their in-process descendants; omission allows the selected adapter's exact-model default to apply, or otherwise preserves provider behavior. The notification payload types depend on SessionEvent (dsh-session), ContentBlock (dsh-llm), and SubagentStopReason (dsh-subagent) — the protocol streams full session-log envelopes, so the session vocabulary is part of the wire contract. serverInfo.name stays the wire-stable deepseek-harness-sdk-runtime.

Model Experience

None, as this package defines the client-facing wire protocol; the model-visible surfaces belong to the runtime plugins composed behind the serving dsh-jsonrpc entry.

KV Cache effect

None; this package neither assembles nor sends a provider request.

Known Limitations and Deferred Work

  • No protocol-version negotiation — the handshake carries only serverInfo.version (0.0.1, unvalidated by clients); pre-release stance, no compatibility promise.
  • No cancel or session-close methods — a client abandons a turn by closing the runtime process; see the dsh-jsonrpc README.
  • Server→client requests are dead capability — the transport supports them, but the server never sends one; the Python SDK's responder surface exists for future approval flows.