The base-mounted projection cache's write-behind forces session-log flushes at cache-chosen times, splitting packed chunk rows and changing the durable JSONL batching the keyless headless and sdk replay fixtures pin. Neither profile exposes a session-listing surface — the one-shot runner and the SDK protocol — so both bundles disable the base row, restoring the pre-base behavior the fixtures were recorded against (the same pattern acp-app uses).
@deepseek-ai/dsh-headless
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The dsh one-shot bundle. cordis.patch.yml rides directly over dsh-base: it inherits the base's disabled module-HMR policy, supplies the coding persona and tool mode, mounts Code Mode's worker as a core execution capability, and inserts this package's headless-runner plugin (config {task}, resolved from the injected headlessStartup provider). It mounts no Host, HTTP server, Web runtime, or browser plugin. It also keeps the base projection cache disabled: the one-shot runner exposes no session-listing surface, and the cache's write-behind would force session-log flushes at cache-chosen times, changing the durable JSONL batching this profile's keyless replay fixtures pin.
After the Loader settles, the runner reads the shared ctx.agentDefaultModel, creates one fresh persisted Agent through ctx.agents, submits the task as an ordinary user message, and waits for quiescence. It flushes the Session before folding the owned durable event interval, writes the last non-empty assistant text to stdout, and requests exit through the launcher-provided ctx.appExit host hook (dsh-cmdline) (final turn/end completed → 0, otherwise 1). A terminal error reason also writes its code and message to stderr; successful runs keep stderr empty. The process opens no listening port. The task text is this app's command line: the ordinary headless-startup provider (src/startup.ts) injects ctx.cmdlineArgs (dsh-cmdline), reads the positional argument of dsh --profile headless "task", prints the app's --help, and provides headlessStartup; the runner injects that service and reads its task from lazy config. A missing or whitespace-only task is rejected before the runner activates.
Model Experience
None, as the runner submits the task as an ordinary user message; prompts and tools belong to the base and headless bundle rows.
KV Cache effect
None; the runner adds nothing to the request prefix.
Known Limitations and Deferred Work
- One submitted task only — the runner has no interactive follow-up surface; it waits through any work the Agent completes before returning to idle and prints the last non-empty assistant message in that interval.
ctx.appExitis launcher-owned — booting the headless profile outside thedshlauncher fails loud at activation until the host provides the exit request.