# Capability Seams And Core Services A service can be a core spine service, a swappable capability seam, or a bundle/composition point. The graph shows the package that owns the service declaration, known implementation packages, and packages that consume the service directly. ```mermaid flowchart LR pkg_llm["llm"] svc_llm["ctx.llm
LLM adapter registry"] pkg_llm_deepseek["llm-deepseek"] pkg_llm_pi_ai["llm-pi-ai"] pkg_llm_replay["llm-replay"] pkg_agent_loop["agent-loop"] pkg_compact_basic["compact-basic"] pkg_token_meter["token-meter"] svc_tokenMeter["ctx.tokenMeter
Replay token measurement"] pkg_compact_tool_result_prune["compact-tool-result-prune"] svc_toolResultPrune["ctx.toolResultPrune
Model-free tool-result pruning"] pkg_session["session"] svc_sessions["ctx.sessions
In-memory session store"] pkg_agent["agent"] pkg_cli_demo["cli-demo"] pkg_session_persistence["session-persistence"] pkg_session_query["session-query"] pkg_session_query_sqlite["session-query-sqlite"] pkg_subagent_inprocess["subagent-inprocess"] pkg_invariants["invariants"] svc_invariants["ctx.invariants
Package-owned invariant registry"] pkg_scope["scope"] svc_sessionPersistence["ctx.sessionPersistence
Durable session persistence seam"] pkg_session_persistence_jsonl["session-persistence-jsonl"] pkg_session_persistence_sqlite["session-persistence-sqlite"] pkg_tool_bash["tool-bash"] pkg_hooks_claude["hooks-claude"] pkg_hooks_codex["hooks-codex"] pkg_acp["acp"] svc_sessionQuery["ctx.sessionQuery
Session reads, traces, filters, and search"] pkg_session_reference["session-reference"] pkg_tool_session_query["tool-session-query"] svc_sessionReferences["ctx.sessionReferences
Cross-session snapshot preparation"] pkg_tui["tui"] pkg_session_title["session-title"] svc_sessionTitle["ctx.sessionTitle
Log-backed session titles"] pkg_session_title_first_message_llm["session-title-first-message-llm"] pkg_session_title_all_messages_llm["session-title-all-messages-llm"] pkg_system_prompt["system-prompt"] svc_systemPrompt["ctx.systemPrompt
System prompt assembly registry"] pkg_tools["tools"] pkg_tool_fs["tool-fs"] pkg_tool_pty["tool-pty"] pkg_tool_web["tool-web"] svc_tools["ctx.tools
Tool registry and guarded execution pipeline"] pkg_tool_ask_user["tool-ask-user"] pkg_tool_cordis["tool-cordis"] pkg_tool_skill["tool-skill"] pkg_tool_subagent["tool-subagent"] pkg_tool_todo["tool-todo"] pkg_user_interaction["user-interaction"] svc_userInteraction["ctx.userInteraction
Human question/answer seam"] pkg_plan_mode["plan-mode"] svc_planMode["ctx.planMode
Plan collaboration state"] pkg_commands["commands"] svc_commands["ctx.commands
Human command registry"] svc_tui["ctx.tui
Mounted-terminal interaction service"] pkg_skill["skill"] svc_skills["ctx.skills
Skill provider registry"] pkg_skill_local["skill-local"] svc_agents["ctx.agents
Agent service"] pkg_tui_demo["tui-demo"] svc_agentLoop["ctx.agentLoop
Concrete loop driver"] pkg_agent_spine_demo["agent-spine-demo"] pkg_goal["goal"] svc_goals["ctx.goals
Same-session goal domain"] pkg_bash["bash"] svc_bash["ctx.bash
Bash executor seam"] pkg_bash_local["bash-local"] pkg_bash_sandbox["bash-sandbox"] svc_bashEnv["ctx.bashEnv
Managed bash environment registry"] pkg_pty["pty"] svc_pty["ctx.pty
Persistent PTY session registry"] pkg_pty_local["pty-local"] pkg_sandbox["sandbox"] svc_sandbox["ctx.sandbox
Process-sandbox seam"] pkg_sandbox_local["sandbox-local"] pkg_sandbox_policy["sandbox-policy"] svc_sandboxPolicy["ctx.sandboxPolicy
Sandbox policy home"] pkg_fs_sandbox["fs-sandbox"] pkg_approval["approval"] svc_approval["ctx.approval
Approval seam"] pkg_permission["permission"] svc_permission["ctx.permission
Permission presets"] pkg_code_runtime["code-runtime"] svc_codeRuntime["ctx.codeRuntime
Code-execution seam"] pkg_code_runtime_worker["code-runtime-worker"] pkg_fs["fs"] svc_fs["ctx.fs
Filesystem provider seam"] pkg_fs_local["fs-local"] pkg_fs_policy["fs-policy"] pkg_compact["compact"] svc_compact["ctx.compact
Compaction seam"] pkg_subagent["subagent"] svc_subagents["ctx.subagents
Subagent provider registry"] pkg_subagent_spawn["subagent-spawn"] pkg_subagent_fork["subagent-fork"] pkg_subagent_acp["subagent-acp"] pkg_tool_ralph["tool-ralph"] pkg_tasks["tasks"] svc_tasks["ctx.tasks
Background task registry"] pkg_tool_tasks["tool-tasks"] pkg_web["web"] svc_web["ctx.web
Web access provider registry"] pkg_web_search_exa["web-search-exa"] pkg_web_search_perplexity["web-search-perplexity"] pkg_web_search_deepseek["web-search-deepseek"] pkg_web_fetch_local["web-fetch-local"] pkg_spill["spill"] svc_spillStore["ctx.spillStore
Spill storage seam"] pkg_spill_local["spill-local"] pkg_spill_policy["spill-policy"] pkg_workflow["workflow"] svc_workflows["ctx.workflows
Workflow script engine"] pkg_workflow_workerthread["workflow-workerthread"] pkg_tool_workflow["tool-workflow"] pkg_acp --> svc_approval pkg_acp --> svc_userInteraction pkg_agent --> svc_agents pkg_agent_loop --> svc_agentLoop pkg_approval --> svc_approval pkg_bash --> svc_bash pkg_bash_local --> svc_bash pkg_bash_sandbox --> svc_bash pkg_code_runtime --> svc_codeRuntime pkg_code_runtime_worker --> svc_codeRuntime pkg_commands --> svc_commands pkg_compact --> svc_compact pkg_compact_basic --> svc_compact pkg_compact_tool_result_prune --> svc_toolResultPrune pkg_fs --> svc_fs pkg_fs_local --> svc_fs pkg_fs_sandbox --> svc_fs pkg_goal --> svc_goals pkg_invariants --> svc_invariants pkg_llm --> svc_llm pkg_llm_deepseek --> svc_llm pkg_llm_pi_ai --> svc_llm pkg_llm_replay --> svc_llm pkg_permission --> svc_permission pkg_plan_mode --> svc_planMode pkg_pty --> svc_pty pkg_pty_local --> svc_pty pkg_sandbox --> svc_sandbox pkg_sandbox_local --> svc_sandbox pkg_sandbox_policy --> svc_sandboxPolicy pkg_session --> svc_sessions pkg_session_persistence --> svc_sessionPersistence pkg_session_persistence_jsonl --> svc_sessionPersistence pkg_session_persistence_sqlite --> svc_sessionPersistence pkg_session_query --> svc_sessionQuery pkg_session_query_sqlite --> svc_sessionQuery pkg_session_reference --> svc_sessionReferences pkg_session_title --> svc_sessionTitle pkg_session_title_all_messages_llm --> svc_sessionTitle pkg_session_title_first_message_llm --> svc_sessionTitle pkg_skill --> svc_skills pkg_skill_local --> svc_skills pkg_spill --> svc_spillStore pkg_spill_local --> svc_spillStore pkg_subagent --> svc_subagents pkg_subagent_acp --> svc_subagents pkg_subagent_fork --> svc_subagents pkg_subagent_spawn --> svc_subagents pkg_system_prompt --> svc_systemPrompt pkg_tasks --> svc_tasks pkg_token_meter --> svc_tokenMeter pkg_tool_bash --> svc_bashEnv pkg_tools --> svc_tools pkg_tui --> svc_tui pkg_tui --> svc_userInteraction pkg_user_interaction --> svc_userInteraction pkg_web --> svc_web pkg_web_fetch_local --> svc_web pkg_web_search_deepseek --> svc_web pkg_web_search_exa --> svc_web pkg_web_search_perplexity --> svc_web pkg_workflow --> svc_workflows pkg_workflow_workerthread --> svc_workflows svc_agentLoop --> pkg_agent_spine_demo svc_agents --> pkg_acp svc_agents --> pkg_agent_loop svc_agents --> pkg_cli_demo svc_agents --> pkg_subagent_inprocess svc_agents --> pkg_tui_demo svc_approval --> pkg_tool_bash svc_approval --> pkg_tools svc_bash --> pkg_hooks_claude svc_bash --> pkg_hooks_codex svc_bash --> pkg_tool_bash svc_codeRuntime --> pkg_tools svc_commands --> pkg_acp svc_commands --> pkg_tui svc_compact --> pkg_compact_basic svc_fs --> pkg_tool_fs svc_invariants --> pkg_agent svc_invariants --> pkg_agent_loop svc_invariants --> pkg_scope svc_invariants --> pkg_session svc_llm --> pkg_agent_loop svc_llm --> pkg_compact_basic svc_permission --> pkg_acp svc_planMode --> pkg_acp svc_pty --> pkg_tool_pty svc_sandbox --> pkg_bash_sandbox svc_sandbox --> pkg_pty_local svc_sandboxPolicy --> pkg_bash_sandbox svc_sandboxPolicy --> pkg_fs_sandbox svc_sandboxPolicy --> pkg_pty_local svc_sessionPersistence --> pkg_acp svc_sessionPersistence --> pkg_agent_loop svc_sessionPersistence --> pkg_hooks_claude svc_sessionPersistence --> pkg_hooks_codex svc_sessionPersistence --> pkg_session_query svc_sessionPersistence --> pkg_session_query_sqlite svc_sessionPersistence --> pkg_tool_bash svc_sessionQuery --> pkg_session_reference svc_sessionQuery --> pkg_tool_session_query svc_sessionReferences --> pkg_acp svc_sessionReferences --> pkg_tui svc_sessions --> pkg_agent svc_sessions --> pkg_agent_loop svc_sessions --> pkg_cli_demo svc_sessions --> pkg_invariants svc_sessions --> pkg_session_persistence svc_sessions --> pkg_session_query svc_sessions --> pkg_session_query_sqlite svc_sessions --> pkg_subagent_inprocess svc_skills --> pkg_tool_skill svc_spillStore --> pkg_spill_policy svc_subagents --> pkg_tool_ralph svc_subagents --> pkg_tool_subagent svc_systemPrompt --> pkg_agent_loop svc_systemPrompt --> pkg_tool_fs svc_systemPrompt --> pkg_tool_pty svc_systemPrompt --> pkg_tool_web svc_systemPrompt --> pkg_tools svc_tasks --> pkg_tool_bash svc_tasks --> pkg_tool_pty svc_tasks --> pkg_tool_subagent svc_tasks --> pkg_tool_tasks svc_tokenMeter --> pkg_compact_basic svc_toolResultPrune --> pkg_compact_basic svc_tools --> pkg_acp svc_tools --> pkg_agent_loop svc_tools --> pkg_tool_ask_user svc_tools --> pkg_tool_bash svc_tools --> pkg_tool_cordis svc_tools --> pkg_tool_fs svc_tools --> pkg_tool_pty svc_tools --> pkg_tool_skill svc_tools --> pkg_tool_subagent svc_tools --> pkg_tool_todo svc_tools --> pkg_tool_web svc_userInteraction --> pkg_acp svc_userInteraction --> pkg_tool_ask_user svc_userInteraction --> pkg_tui svc_web --> pkg_tool_web svc_workflows --> pkg_tool_ralph svc_workflows --> pkg_tool_workflow svc_fs -. event gate .-> pkg_fs_policy ``` | ctx key | Role | Owner | Implementations | Direct consumers | Companion plugins | Note | | --- | --- | --- | --- | --- | --- | --- | | `ctx.llm` | `seam` | [`llm`](../packages/llm/llm) | [`llm-deepseek`](../packages/llm/llm-deepseek), [`llm-pi-ai`](../packages/llm/llm-pi-ai), [`llm-replay`](../packages/support/llm-replay) | [`agent-loop`](../packages/core/agent-loop), [`compact-basic`](../packages/compact/compact-basic) | - | Adapters register provider implementations; the loop and compaction call the provider-neutral stream service. | | `ctx.tokenMeter` | `core` | [`token-meter`](../packages/llm/token-meter) | - | [`compact-basic`](../packages/compact/compact-basic) | - | Owns isolated per-session replay folds; pressure consumers share immutable revisioned measurements. | | `ctx.toolResultPrune` | `core` | [`compact-tool-result-prune`](../packages/compact/compact-tool-result-prune) | - | [`compact-basic`](../packages/compact/compact-basic) | - | Rewrites oversized current tool results through replayable single-node surface replacements before summary compaction. | | `ctx.sessions` | `core` | [`session`](../packages/core/session) | - | [`agent-loop`](../packages/core/agent-loop), [`agent`](../packages/core/agent), [`cli-demo`](../packages/examples/cli-demo), [`session-persistence`](../packages/session-persistence/session-persistence), [`session-query`](../packages/session-query/session-query), [`session-query-sqlite`](../packages/session-query/session-query-sqlite), [`subagent-inprocess`](../packages/subagent/subagent-inprocess), [`invariants`](../packages/support/invariants) | - | Owns append-only Session instances and emits the durable session event feed. | | `ctx.invariants` | `core` | [`invariants`](../packages/support/invariants) | - | [`session`](../packages/core/session), [`agent`](../packages/core/agent), [`scope`](../packages/core/scope), [`agent-loop`](../packages/core/agent-loop) | - | Companion subpaths register owner-local checks; the service owns selection, uniqueness, child fibers, and package-attributed failures. | | `ctx.sessionPersistence` | `seam` | [`session-persistence`](../packages/session-persistence/session-persistence) | [`session-persistence-jsonl`](../packages/session-persistence/session-persistence-jsonl), [`session-persistence-sqlite`](../packages/session-persistence/session-persistence-sqlite) | [`agent-loop`](../packages/core/agent-loop), [`tool-bash`](../packages/bash/tool-bash), [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex), [`acp`](../packages/ui/acp), [`session-query`](../packages/session-query/session-query), [`session-query-sqlite`](../packages/session-query/session-query-sqlite) | - | Backends persist the same SessionEvent vocabulary; apps choose a backend at composition time. | | `ctx.sessionQuery` | `seam` | [`session-query`](../packages/session-query/session-query) | [`session-query-sqlite`](../packages/session-query/session-query-sqlite) | [`session-reference`](../packages/context/session-reference), [`tool-session-query`](../packages/session-query/tool-session-query) | - | The interface supplies exact reads, filters, and traces; its concrete backend adds full-text reconciliation, ranking, snippets, and cursor generations, while the model consumer owns workspace authority and cursor-free rendering. | | `ctx.sessionReferences` | `core` | [`session-reference`](../packages/context/session-reference) | - | [`tui`](../packages/ui/tui), [`acp`](../packages/ui/acp) | - | Projects bounded current-surface conversation snapshots into durable untrusted message context; host adapters own mention syntax. | | `ctx.sessionTitle` | `seam` | [`session-title`](../packages/session-title/session-title) | [`session-title-first-message-llm`](../packages/session-title/session-title-first-message-llm), [`session-title-all-messages-llm`](../packages/session-title/session-title-all-messages-llm) | - | - | Owns the deterministic fallback, latest-title fold, and sole optional asynchronous provider registration. | | `ctx.systemPrompt` | `core` | [`system-prompt`](../packages/core/system-prompt) | - | [`agent-loop`](../packages/core/agent-loop), [`tools`](../packages/core/tools), [`tool-fs`](../packages/fs/tool-fs), [`tool-pty`](../packages/pty/tool-pty), [`tool-web`](../packages/web/tool-web) | - | Collects prompt sections and model-facing tool schemas for each step. | | `ctx.tools` | `core` | [`tools`](../packages/core/tools) | - | [`agent-loop`](../packages/core/agent-loop), [`tool-ask-user`](../packages/ui/tool-ask-user), [`tool-bash`](../packages/bash/tool-bash), [`tool-cordis`](../packages/cordis/tool-cordis), [`tool-fs`](../packages/fs/tool-fs), [`tool-pty`](../packages/pty/tool-pty), [`tool-skill`](../packages/skill/tool-skill), [`tool-subagent`](../packages/subagent/tool-subagent), [`tool-todo`](../packages/todo/tool-todo), [`tool-web`](../packages/web/tool-web), [`acp`](../packages/ui/acp) | - | Registers capabilities, owns Code Mode transport, and routes calls through pre-policy, monotonic guards, around dispatch, post-policy, and final-result observation. | | `ctx.userInteraction` | `seam` | [`user-interaction`](../packages/ui/user-interaction) | [`tui`](../packages/ui/tui), [`acp`](../packages/ui/acp) | [`tool-ask-user`](../packages/ui/tool-ask-user), [`tui`](../packages/ui/tui), [`acp`](../packages/ui/acp) | - | UI front doors provide the active human-answer provider; tool-ask-user pauses a tool call on the provider-neutral ask() promise. | | `ctx.planMode` | `core` | [`plan-mode`](../packages/plan/plan-mode) | - | [`acp`](../packages/ui/acp) | - | Folds logged plan/mode state, flushes user selections at turn boundaries, renders deployment-owned guidance, registers /plan, and keeps the plan-exit schema stable across transitions. | | `ctx.commands` | `core` | [`commands`](../packages/ui/commands) | - | [`tui`](../packages/ui/tui), [`acp`](../packages/ui/acp) | - | Plugins register direct human commands; TUI and ACP consume the same effective per-agent catalog without sending invocations to the model. | | `ctx.tui` | `bundle` | [`tui`](../packages/ui/tui) | - | - | - | One TUI front door provides a FIFO overlay host; injected plugins receive caller-fiber ownership without access to pi-tui or terminal lifecycle state. | | `ctx.skills` | `seam` | [`skill`](../packages/skill/skill) | [`skill-local`](../packages/skill/skill-local) | [`tool-skill`](../packages/skill/tool-skill) | - | Merges provider skill catalogs; tool-skill renders the session-prefix catalog and loads complete skill bodies. | | `ctx.agents` | `core` | [`agent`](../packages/core/agent) | - | [`agent-loop`](../packages/core/agent-loop), [`acp`](../packages/ui/acp), [`cli-demo`](../packages/examples/cli-demo), [`subagent-inprocess`](../packages/subagent/subagent-inprocess), [`tui-demo`](../packages/examples/tui-demo) | - | Owns live Agent handles, the create/resume factory seam, and process-local initiator propagation. | | `ctx.agentLoop` | `bundle` | [`agent-loop`](../packages/core/agent-loop) | - | [`agent-spine-demo`](../packages/examples/agent-spine-demo) | - | The one concrete loop plugin; extension packages depend on dsh-agent events and services, not on this package. | | `ctx.goals` | `core` | [`goal`](../packages/goal/goal) | - | - | - | Folds revisioned objective state from the session log and keeps live continuation activation process-local. | | `ctx.bash` | `seam` | [`bash`](../packages/bash/bash) | [`bash-local`](../packages/bash/bash-local), [`bash-sandbox`](../packages/bash/bash-sandbox) | [`tool-bash`](../packages/bash/tool-bash), [`hooks-claude`](../packages/hooks/hooks-claude), [`hooks-codex`](../packages/hooks/hooks-codex) | - | The model-facing bash tools and hook bridges consume this seam; sandboxed or remote executors replace bash-local without touching them. | | `ctx.bashEnv` | `core` | [`tool-bash`](../packages/bash/tool-bash) | - | - | - | Plugins declare effect-scoped DSH_* facts; tool-bash collects one trusted snapshot per execution and the executor rebuilds the namespace. | | `ctx.pty` | `seam` | [`pty`](../packages/pty/pty) | [`pty-local`](../packages/pty/pty-local) | [`tool-pty`](../packages/pty/tool-pty) | - | The registry owns exact-Agent session identity and cleanup; backends own terminal mechanics, while tool-pty exposes the owner-scoped model surface. | | `ctx.sandbox` | `seam` | [`sandbox`](../packages/sandbox/sandbox) | [`sandbox-local`](../packages/sandbox/sandbox-local) | [`bash-sandbox`](../packages/bash/bash-sandbox), [`pty-local`](../packages/pty/pty-local) | - | Consumers hand over the exact argv they are about to spawn; same-world backends wrap it under a per-call policy and report enforcement. | | `ctx.sandboxPolicy` | `core` | [`sandbox-policy`](../packages/sandbox/sandbox-policy) | - | [`bash-sandbox`](../packages/bash/bash-sandbox), [`fs-sandbox`](../packages/fs/fs-sandbox), [`pty-local`](../packages/pty/pty-local) | - | The one home for the deployment default mode + workspace root; only the sandboxed executor and provider read the service (the tool layers use the pure `sandbox/mode` fold it also exports). Both enforcing families read it so bash and fs cannot confine to different roots. | | `ctx.approval` | `seam` | `approval` | [`acp`](../packages/ui/acp) | [`tools`](../packages/core/tools), [`tool-bash`](../packages/bash/tool-bash) | - | One-shot permission decisions dispatched over the `approval/request` waterfall; answerers are listeners (the ACP bridge for its own agents), absence fails closed to `unavailable`. | | `ctx.permission` | `core` | [`permission`](../packages/ui/permission) | - | [`acp`](../packages/ui/acp) | - | User-facing preset table (`workspace-write`/`danger-full-access`) bundling the sandbox-mode and approval-policy knobs; a switch writes one `permission/preset` event through to both knob events. | | `ctx.codeRuntime` | `seam` | [`code-runtime`](../packages/code-runtime/code-runtime) | [`code-runtime-worker`](../packages/code-runtime/code-runtime-worker) | [`tools`](../packages/core/tools) | - | Runs one model-written program against host-provided async bindings; backends differ by substrate and language (the tool registry consumes it for Code Mode). | | `ctx.fs` | `seam` | [`fs`](../packages/fs/fs) | [`fs-local`](../packages/fs/fs-local), [`fs-sandbox`](../packages/fs/fs-sandbox) | [`tool-fs`](../packages/fs/tool-fs) | [`fs-policy`](../packages/fs/fs-policy) | tool-fs executes read/write/edit through ctx.fs; fs-sandbox fences mutations by the shared sandbox mode; fs-policy contributes observed-state checks through the fs/* event gate. | | `ctx.compact` | `seam` | [`compact`](../packages/compact/compact) | [`compact-basic`](../packages/compact/compact-basic) | [`compact-basic`](../packages/compact/compact-basic) | - | The basic backend consumes post-step pressure and request-error recovery events; a model-facing compact tool remains deferred. | | `ctx.subagents` | `seam` | [`subagent`](../packages/subagent/subagent) | [`subagent-spawn`](../packages/subagent/subagent-spawn), [`subagent-fork`](../packages/subagent/subagent-fork), [`subagent-acp`](../packages/subagent/subagent-acp) | [`tool-subagent`](../packages/subagent/tool-subagent), [`tool-ralph`](../packages/workflow/tool-ralph) | - | Providers implement transports; tool-subagent exposes configured delegation while tool-ralph requires one fresh structured-output route. | | `ctx.tasks` | `core` | [`tasks`](../packages/tasks/tasks) | - | [`tool-bash`](../packages/bash/tool-bash), [`tool-pty`](../packages/pty/tool-pty), [`tool-subagent`](../packages/subagent/tool-subagent), [`tool-tasks`](../packages/tasks/tool-tasks) | - | Producers (background bash, PTY sends, and subagent delegations) register running work; tool-tasks is the model-facing control surface that reads, lists, and kills it. | | `ctx.web` | `seam` | [`web`](../packages/web/web) | [`web-search-exa`](../packages/web/web-search-exa), [`web-search-perplexity`](../packages/web/web-search-perplexity), [`web-search-deepseek`](../packages/web/web-search-deepseek), [`web-fetch-local`](../packages/web/web-fetch-local) | [`tool-web`](../packages/web/tool-web) | - | Search and fetch providers register into one ctx.web seam; tool-web owns the stable model-facing names. | | `ctx.spillStore` | `seam` | [`spill`](../packages/spill/spill) | [`spill-local`](../packages/spill/spill-local) | [`spill-policy`](../packages/spill/spill-policy) | - | The backend saves oversized tool text and returns a model-facing locator plus retrieval hint; spill-policy is the tools/post-execute consumer that decides when to spill. | | `ctx.workflows` | `seam` | [`workflow`](../packages/workflow/workflow) | [`workflow-workerthread`](../packages/workflow/workflow-workerthread) | [`tool-workflow`](../packages/workflow/tool-workflow), [`tool-ralph`](../packages/workflow/tool-ralph) | - | One engine per context (bash shape, no named-provider registry); the general workflow and fixed Ralph consumers start runs whose agent() calls fan out through ctx.subagents. | Maintenance mode: hybrid: services are discovered from Cordis declarations; interface/implementation/consumer roles are classified in `scripts/gen-doc-graphs.ts` with a completeness guard.