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deepseek-harness/docs/event-producer-consumer.md
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Dudu-0223 99a778d63f feat(subagent): continuable background subagents 
Implement the continuable background subagents RFC: a durable child
session with a series of Task-backed activations, each disposing its
run before the Task settles.

- dsh-subagent: rename SubagentRun.sendMessage to strict steer, drop
  run-level resume, add SubagentProvider.resume dispatch via
  SubagentService.resume, the continuation start field, and the
  versioned model-hidden subagent/descriptor session event.
- dsh-subagent-inprocess/-spawn/-fork: publish the control-allocated
  child id, append the descriptor inside the initial turn, implement
  cold resume from the child's own transcript under the live parent
  scope, and strict running-only steer.
- dsh-subagent-control (new): SubagentControlService owning stable
  child ids, descriptor snapshot/fold/authorization, Task-backed
  activation with settle-then-dispose ordering, the process-local
  active-run association, and steer-or-resume sendMessage routing.
- dsh-tool-subagent: background route branches on the provider's
  resume capability (continuable via the control service; one-shot
  task for ACP), returning both child and task ids.
- dsh-tool-subagent-control (new): the globally named send_message
  tool rendering steered/started routes.

Keyless coverage spans Task ownership and disposal ordering, running
delivery, cold follow-up, descriptor rejection and rollback, known-id
reconstruction, kill during lookup, admission races, and a new
subagent-continuable ACP snapshot scenario.
2026-08-02 04:34:15 +08:00

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Event Producer And Consumer Matrix

This matrix shows which packages dispatch each harness-owned event and which packages listen to it. It is intentionally a table rather than one large graph: events are many-to-many, and dense relation data is easier to review in rows. Receiver and event-name types also cover contained dispatch sites that deliberately bypass ctx.emit, such as subagent lifecycle containment.

Event Mode Declared in Dispatchers Listeners
agent-loop/config-start-failed emit packages/core/agent-loop/src/index.ts:157 agent-loop (events.dispatch) tui
agent/cancel-requested emit packages/core/agent/src/types.ts:333 agent-loop (emitAgentEvent) goal-session
agent/created emit packages/core/agent/src/types.ts:264 agent (events.dispatch) goal-session, tui
agent/disposed emit packages/core/agent/src/types.ts:273 agent (events.dispatch) agent-loop, goal-session, tui
agent/error emit packages/core/agent/src/types.ts:447 agent-loop (emitAgentEvent) apiproxy, goal-session, session-telemetry, tui
agent/inbox/dequeue emit packages/core/agent/src/types.ts:311 agent-loop (emitAgentEvent) agent, apiproxy, tui
agent/inbox/discard emit packages/core/agent/src/types.ts:323 agent-loop (emitAgentEvent) agent, apiproxy, tui
agent/inbox/enqueue emit packages/core/agent/src/types.ts:292 agent-loop (emitAgentEvent) agent, apiproxy, goal-session
agent/inbox/update emit packages/core/agent/src/types.ts:301 agent-loop (emitAgentEvent) apiproxy
agent/prompt-submit waterfall packages/core/agent/src/types.ts:360 agent-loop (waterfall) goal-session, hooks-claude, hooks-codex, repeat-tool-guard, tui
agent/request waterfall packages/core/agent/src/types.ts:386 agent-loop (waterfall) agent
agent/request-error waterfall packages/core/agent/src/types.ts:405 agent-loop (waterfall) compact-basic, llm-retry
agent/session-start emit packages/core/agent/src/types.ts:346 agent-loop (emitAgentEvent) goal, goal-session, hooks-claude, hooks-codex, workspace-context
agent/settled emit packages/core/agent/src/types.ts:434 agent-loop (emitAgentEvent) compact-basic
agent/status emit packages/core/agent/src/types.ts:282 agent-loop (emitAgentEvent) agent, apiproxy, goal-session, tui
agent/step serial packages/core/agent/src/types.ts:373 agent-loop (serial) compact-basic, plan-mode, session-checkpoint-policy, subagent-inprocess, time-context, tmux-context, tool-skill, workspace-context
agent/turn-stopping serial packages/core/agent/src/types.ts:420 agent-loop (serial) hooks-claude, hooks-codex
approval/request waterfall packages/ui/user-approval/src/index.ts:30 user-approval (waterfall) acp, apiproxy
commands/change emit packages/ui/commands/src/index.ts:154 commands (events.dispatch) apiproxy, tui
credentials/updated emit packages/credentials/credentials/src/index.ts:67 credentials (events.dispatch) apiproxy, credentials
domain/changed emit packages/storage/storage-domain/src/events.ts:46 storage-domain (emit) apiproxy, storage-domain, workspace
fs/edit-intent waterfall packages/fs/fs/src/index.ts:62 tool-fs (waterfall), tool-str-replace-editor (waterfall) fs-policy
fs/observed emit packages/fs/fs/src/index.ts:71 tool-fs (emit), tool-str-replace-editor (emit) fs-policy, skill-local
fs/write-intent waterfall packages/fs/fs/src/index.ts:54 tool-fs (waterfall), tool-str-replace-editor (waterfall) fs-policy
goal/changed emit packages/goal/goal/src/domain.ts:135 goal (emit) goal-session
llm/adapters-updated emit packages/llm/llm/src/index.ts:71 llm (events.dispatch) apiproxy, llm, tui
llm/stream waterfall packages/llm/llm/src/index.ts:60 llm (waterfall) agent-loop, llm, llm-replay, session-checkpoint-policy, session-title
session/created emit packages/core/session/src/index.ts:71 session (events.dispatch) apiproxy, compact, goal, hook-protocol, jsonrpc, llm-retry, permission, plan-mode, session, session-persistence, session-telemetry, tools, user-approval
session/disposed emit packages/core/session/src/index.ts:81 session (events.dispatch) agent-loop, apiproxy, session-persistence, session-projection-cache, session-telemetry, session-title
session/event emit packages/core/session/src/index.ts:93 session (events.dispatch) acp, apiproxy, cli-demo, compact, compact-basic, goal, goal-session, hook-protocol, jsonrpc, session, session-persistence, session-projection, session-projection-cache, session-telemetry, session-title, token-meter, tools, tui, user-approval, workspace-context
session/flush parallel packages/core/session/src/index.ts:103 session (events.dispatch) session-persistence, session-telemetry
settings/document-updated emit packages/settings/settings/src/index.ts:150 settings (events.dispatch) apiproxy
settings/updated emit packages/settings/settings/src/index.ts:137 settings (events.dispatch) settings
skills/change emit packages/skill/skill/src/index.ts:188 skill (events.dispatch) tui
subagent/end emit packages/subagent/subagent/src/index.ts:150 subagent (events.dispatch) hooks-claude, jsonrpc, subagent
subagent/provider-added emit packages/subagent/subagent/src/index.ts:124 subagent (emit) subagent, tool-subagent
subagent/provider-removed emit packages/subagent/subagent/src/index.ts:130 subagent (events.dispatch) subagent, tool-subagent
subagent/start emit packages/subagent/subagent/src/index.ts:141 subagent (events.dispatch) hooks-claude, subagent
system-prompt/assemble waterfall packages/core/system-prompt/src/index.ts:29 system-prompt (waterfall) agent, system-prompt
system-prompt/change emit packages/core/system-prompt/src/index.ts:35 system-prompt (emit) -
telemetry/record waterfall packages/telemetry/session-telemetry/src/index.ts:41 session-telemetry (waterfall) -
tools/change emit packages/core/tools/src/index.ts:167 tools (emit) -
tools/code-dispatch-log waterfall packages/core/tools/src/index.ts:149 tools (waterfall) spill-policy
tools/execute waterfall packages/core/tools/src/index.ts:124 tools (waterfall) session-checkpoint-policy, timeout-policy
tools/post-execute waterfall packages/core/tools/src/index.ts:136 tools (waterfall) hooks-claude, hooks-codex, repeat-tool-guard, spill-policy, tool-fs-search, workspace-context
tools/pre-execute waterfall packages/core/tools/src/index.ts:113 tools (waterfall) hooks-claude, hooks-codex, tool-tasks
tools/result emit packages/core/tools/src/index.ts:157 tools (events.dispatch) subagent-inprocess, workspace-context
workflow/agent-end emit packages/workflow/workflow/src/index.ts:81 workflow (events.dispatch) workflow
workflow/agent-start emit packages/workflow/workflow/src/index.ts:70 workflow (events.dispatch) workflow
workflow/end emit packages/workflow/workflow/src/index.ts:91 workflow (events.dispatch) workflow
workflow/log emit packages/workflow/workflow/src/index.ts:60 workflow (events.dispatch) -
workflow/phase emit packages/workflow/workflow/src/index.ts:53 workflow (events.dispatch) -
workflow/start emit packages/workflow/workflow/src/index.ts:45 workflow (events.dispatch) workflow

Non-harness or undeclared event strings seen in package source

Event string Dispatchers Listeners
commands/changed runtime (emit) ui-command
connection/reset runtime (emit) ui-command, ui-models, ui-permission, ui-settings-general
credentials/changed runtime (emit) ui-models
internal/dispatch - commands, compact, fs, goal, goal-session, hook-protocol, llm-retry, permission, plan-mode, pty-local, runtime, sandbox-policy, scope, session, session-title, subagent, time-context, tool-todo, tools, user-approval, workflow
internal/plugin - hmr, loader, modules, webserver
internal/status - agent
locale/change locale (emit) locale
models/changed runtime (emit) ui-models
settings/changed runtime (emit) ui-models, ui-permission, ui-settings-general
slash/input-begin-command - ui-conversation
slash/input-consume-token - ui-conversation
slash/input-insert-reference - ui-conversation
slash/input-insert-text - ui-conversation
slots/changed runtime (emit) -
theme/change ui-theme (emit) ui-layout, ui-theme

Maintenance mode: generated: Cordis event declarations and producer/listener edges are resolved from the repository TypeScript Program.

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