description: "SDK stdio application profile for users and maintainers launching a JSON-RPC harness runtime."
kind: "package-bundle"
@deepseek-ai/dsh-sdk-app
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Summary
The SDK stdio application as a dsh profile bundle over dsh-base. It inherits the base's disabled module-HMR policy; its patch sets the coding-agent persona, mounts an app-owned zero-option command provider, and starts dsh-sdk-jsonrpc-server only after that provider accepts the invocation. dsh --profile sdk --help therefore writes help and exits without claiming stdin or stdout. The standalone sdk-minimal bundle reuses the same startup provider with its own profile name.
Table of Contents
Use this package
The startup provider binds stdin EOF to the launcher's bounded successful shutdown. SDK protocol shutdown, SIGINT, and SIGTERM retain their owning server or launcher paths; disposal drains the root profile tree and persistence. Stdout is reserved for newline-delimited JSON-RPC frames. The bundle disables model-generated session titles because the SDK exposes no title surface; deterministic fallback titles remain durable without an auxiliary model request. The inherited projection cache checkpoints SDK-created sessions for later consumers; its durability barrier flushes each covered log prefix before publishing the cache row and may split otherwise coalesced JSONL runs. A deployment selects a different complete composition through profile bundles and patch files, not another app bin.
| Config | Default | Behavior |
|---|
profile | sdk | Profile name rendered in command help; a bundle mounting this provider sets its own shipped profile name. |
DSH_MAX_TOKENS_AS_SUCCESS retains the SDK deployment mapping: unset or JSON true reports token-limited subagent completion as accepted, while JSON false reports it as an error. Provider/model and workspace cwd arrive through the SDK initialization request; the base profile owns adapters, tools, persistence, policy, settings, and credentials.
Model Experience
SDK coding-agent persona
What the model sees
The profile supplies You are a coding agent powered by the {{model}} model. Your working directory is {{cwd}}. before the base tool and context contributions. The exact SDK initialization route and session cwd resolve the placeholders.
Token effect
One short stable persona plus the data-dependent base prompt sections and selected tool schemas.
KV Cache effect
Stable for a fixed profile, provider, model, and tool roster. Profile changes take effect on the next process because the shipped SDK profile uses startup-only patches.
Known Limitations and Deferred Work
- A profile can omit the SDK server — a custom profile selected by the TypeScript client must retain this bundle or another
dsh-sdk-jsonrpc-server row; client initialization fails when no peer answers.
- User plugins can violate stdout purity — profile and per-launch patches are trusted application composition. The shipped bundle writes no non-protocol stdout, but it cannot contain an arbitrary inserted plugin.
- Configuration changes require restart — the shipped
sdk profile uses patchReload: startup so one stdio connection never observes a replacement server or Agent dependency.
Dev Note
Working context for maintainers — click to expand
None.
