Yichen Jiang
d6bebc5783
The executor seam collapses run()/start() (and the planned begin()) into one
resolve() + execute(): the handle IS the live process, and the foreground
result, the background cursor, and the deadline's promotion offer are
projections over the same spawn. ShellExecSpec.onExpiry ('kill' default /
'offer' / 'none') replaces the implicit method split; one stdout budget applies
everywhere, the 'start ignores timeoutMs' wart dies, and sync spawn throws are
contained into the same settled-killed handle as async rejections (result()
rejects with the original error, identity preserved for the sandbox
classification).
The promotion offer settles exactly once and never rejects — offer at an
'offer' deadline while running, undefined when the process settles first — so
'await execution.promotion' alone distinguishes the outcomes. An offer must be
answered synchronously; an unanswered one auto-declines back to the
kill-on-timeout behavior. accept() ends the deadline and detaches the caller's
abort signal; decline() kills and classifies timedOut.
tool-bash and tool-pwsh promote on timeout by default (promoteOnTimeout: true,
inert without run_in_background or a job registry): at the offer the running
handle registers as a job with the same hooks as run_in_background, mirrors
into ctx.activities (the web task list streams it, stop control included), and
the call returns { kind: 'promoted', jobId, timeoutMs, output } carrying the
output so far — the job cursor continues exactly after it. Any promotion
failure declines and falls back to the plain timeout kill. Descriptions and
the timeoutMs schema text advertise the semantics only when they hold;
recorded-session and web snapshot fixtures re-recorded with them.
Also repairs the four CI failures from the human-kill push: ui-activity's
missing dsh-session peer declaration (static + windows observational), the
observe owner-arm/outer-catch and killJob-stub coverage gaps, tool-workflow's
owned-run arm, and the timing-dependent projection-cache interval flush test
(now poll-based for coarse Windows timers).
Peer evidence and rejected alternatives (Codex's session model, a third seam
method, a second threshold knob) in the Agent Note
2026-08-26-shell-execute-timeout-promotion.
Subsystems
English | 中文
One page per subsystem of the DeepSeek Harness: what it is, the data structures it moves, and — where a ctx service or event scope backs it — a generated Cordis API section carrying its service and event reference. The folder complements architecture.md, which describes behavior across subsystems (the service map, the session/turn/step lifecycle, the event taxonomy); each page here is the reference for one subsystem's vocabulary and wiring.
| Page | Owns |
|---|---|
| core.md | how packages/core controls the agent loop: the package-by-package loop description, agent creation and ownership (AgentHandle), the Agent handle's delivery/cancellation/interception contracts, and the repo-wide type patterns (…Map → derived-union, branded ids) |
| llm-streaming.md | the packages/llm conversation types — Message/ContentBlock, the assembled model request, the StreamChunk wire protocol and adapter contract, BlockAssembler, and the LlmAdapter provider contract |
| token-meter.md | immutable scalar and positional replay measurements with consumed-log revisions |
| scope.md | scoped registration identity, dispatch carriers, and the owned Scope context |
| typert.md | Remote invocation descriptors, lookup/Context declarations, Typert registries, and the Host Gateway/Client API boundaries |
| goal.md | persisted goal identity, lifecycle snapshots, activation, change records, and round attribution |
| schedule.md | Session-local reminder records, durable transitions, active views, and ordinary-conversation delivery |
| todo.md | the todo package's whole-list item type, durable event ownership, projection, and open-turn invariant |
| commands.md | the human-command registry service: definitions, adapter discovery, direct invocation, results, and parsing views |
| session.md | the full SessionEventMap variant catalog, TurnEndReason, deriveMessages(), execution enclosure, and standalone events |
| persistence.md | the durability seam: SessionPersistence, JSONL + SQLite backends, session/flush, crash recovery, SessionHeader |
| settings.md | the user-settings seam: SettingsNamespace registration, layered resolution (defaults → composition base → user document), owner scopes, hot commits |
| credentials.md | the credential seam: CredentialRef references (never values) in configuration, per-operation resolution, UI-safe CredentialInfo, provider source layers |
| session-query.md | logical records, bounded exact-event reads, relationship traces, semantic filters/documents, and full-text result pages |
| feedback.md | lifecycle-bound per-message feedback records, optimistic versions, sidecar persistence, and the Host Remote contract |
| session-title.md | durable title snapshots, cited source-message seqs, and the asynchronous provider contract |
| session-reference.md | structured cross-session references: SessionReferenceInput/Candidate, prepared message contexts, the stable error taxonomy |
| system-prompt.md | per-assembly context, tool-provider results, prompt sections, and cooperative assembly |
| tools.md | ToolDefinition full fields, the schema DSL, ToolExecution/ToolResult, tool-presentation UI types, and the guarded execution pipeline |
| user-questions.md | the UI-backed human question/answer seam: AskUserQuestionRequest, answer/options vocabulary, provider API, error taxonomy |
| approval.md | the one-shot user-approval seam: ApprovalRequest, ApprovalOutcome, per-session policy, audit events, and answerer contracts |
| attachment.md | durable image identity and metadata, validation inputs, verified reads, and the AttachmentStore seam |
| shell.md | the bash executor seam: ShellExecRequest/Spec, ShellRunResult, background ShellProcess handles |
| subprocess.md | the subprocess seam: fully-explicit SubprocessSpawnSpec, offset-based output readers, unclassified SubprocessOutcome, and the managed DSH_* environment vocabulary |
| terminal.md | persistent terminal ids, backend/session contracts, send readiness, bounded reads, and owner-visible snapshots |
| sandbox.md | per-session policy resolution and the process-confinement seam: file-effect modes, execution/provider policies, ConfinedArgv, enforcement and fail-closed errors |
| code-runtime.md | the code-execution seam: CodeRunRequest/Result, binding namespaces, captured logs, the CodeRunFailure taxonomy |
| extensions.md | versioned dynamic Cordis Plugins and Packages, Host/Client activation, approval, runtime inspection, and lifecycle teardown |
| filesystem.md | the filesystem seam: FsTarget, read/write/edit outcomes, observed-file state, FsErrorCode |
| lsp.md | the LSP navigation seam: LspQueryRequest/Result, LspProvider/Service, four operations, LspError |
| skills.md | the skill service: discovery priority, SkillSummary/SkillDefinition, session-prefix catalog, model-facing skill loading |
| compaction.md | the compaction seam: the compaction/* session events, CompactionResult, the CompactionEngine interface |
| subagent.md | the subagent seam: the named-provider registry, SubagentStartRequest/Result/Run, the start-time-vs-runtime capability split |
| agent-team.md | Agent Teams: implicit Lead identity, named continuable teammates, durable peer mailbox, and shared task DAG |
| web.md | the web access seam: WebSearchRequest/Result, WebFetchRequest/Result, WebFetchBody, provider availability, WebError |
| spill.md | the spill storage seam: SaveTextSpill, SpillOwner/SpillSource, SpillRef, the branded SpillLocator |
| workflow.md | the workflow seam: WorkflowStartRequest, WorkflowMeta, WorkflowRun/Result, the workflow/* event payloads, WorkflowError fatality |
| jobs.md | the background-job runtime: branded JobIds, the producer contract, consumer views, and ctx.jobs service behavior |
| activity.md | live activity observation: branded ActivityIds, the producer handle, non-consuming offset reads, and the wire streams |
| permission-presets.md | the permission-preset layer: PresetSpec/PresetOption, the derived custom state, the log-only permission/preset event |
| plan.md | plan mode: the log-only plan/mode state, pending-selection flush, PlanModeConfig, the exit_plan_mode review arc |
| invariants.md | the runtime-invariant registry: selection Config, InvariantInstaller/InvariantFailure, the empty-companion contract |
| web-server.md | the HTTP carrier: WebRouteKind/WebRoute, match order, the claimable fallback seat, index taps |
| webhook.md | authenticated provider deliveries, arbitrary programmatic rules, and fire-and-forget Workspace Session creation |
| storage.md | the storage subsystem: the backend contract (StorageBackend), StorageForms, DomainSpec/Domain, domain/changed |
| workspace.md | the workspace registry: Workspace/WorkspaceId, registration and resolution, the session cwd relationship |
| web-client.md | the browser architecture: boot, Remote communication, paired Client models, UI adapters, Conversation assembly, Slots, and reconnect semantics |
| client-modules.md | the web plugin table: dsh.client declarations, WebBootGraph wire composition, the bundle route and index tap |
| slots.md | typed Web UI composition: declaration ownership, cardinality and scope, framework and feature injection, props derivation, and the shipped hierarchy |
| conversation.md | target-neutral Session-event assembly: Context identity, Location data, replay paths, view builders, and target-owned render nodes |
| session-projection.md | the projection seam: SessionProjectionMap, the pure ProjectionDefinition unit, ProjectionSnapshot's consistent cut, the change feed |
| session-telemetry.md | the outbound session-reporting capability seam: SessionTelemetryRecord/SessionTelemetrySeverity, the SessionTelemetrySink contract, and the session-telemetry/record redact waterfall |
Type declarations and their JSDoc on these pages are source-equivalent and drift-checked by
pnpm run verify-type-equiv(see development.md). Ordinary blocks preserve complete declarations;public-apiblocks preserve body-stripped public class declarations. Cordis services and events use each page's generated Cordis API section.