refactor: colocate user interaction with ui packages

packages/core/README.md

@@ -7,7 +7,6 @@ The packages every harness build is assembled from: the session log, the system-
 | `session/` | Event-sourced session log + in-memory store | `ctx.sessions` |
 | `system-prompt/` | Prompt-section + tool-schema assembly registry | `ctx.systemPrompt` |
 | `tools/` | Tool registry + `tools/pre-execute`/`tools/post-execute` pipeline | `ctx.tools` |
-| `user-interaction/` | Abstract human question/answer seam used by UI-backed confirmation tools | `ctx.userInteraction` |
 | `agent/` | Agent interface, registry, `agent/*` event vocabulary | `ctx.agents` |
 | `agent-loop/` | The concrete loop plugin: `ReactLoopAgent` + the loop driver | `ctx.agentLoop` |
 | `agent-core/` | Bundle plugin: the providerless/executor-less/UI-less spine as code | (loads the spine) |

packages/ui/README.md

@@ -5,6 +5,7 @@ Integrations that expose the agent to an external editor or client. These are **
 | Package | Role | ctx key |
 |---|---|---|
 | `acp/` | Agent Client Protocol bridge: serves the agent to an ACP editor (Zed) over JSON-RPC stdio | (drives `ctx.agents`/`ctx.sessions`) |
+| `user-interaction/` | Abstract human question/answer seam used by UI-backed confirmation tools | `ctx.userInteraction` |
 | `tool-ask-user/` | Model-facing `ask_user_question` tool over `ctx.userInteraction` | (registers on `ctx.tools`) |
 | `stdio-agent/` | Terminal stdio chat APP: the agent-core spine + console logger + readline UI + a pre-created `main` agent, with a `bin` | (composition + `bin`) |
 | `acp-agent/` | ACP server APP: the agent-core spine + JSONL persistence + the `acp` bridge (no stdout logger), with a `bin` | (composition + `bin`) |
@@ -12,6 +13,6 @@ Integrations that expose the agent to an external editor or client. These are **
 
 A UI integration is a client-driver plugin, not a loop change and not a capability seam: it consumes the existing `agent/*` event taxonomy and the `dsh-agent` factory. The readline UI is the unstructured analogue of the `acp` bridge and lives INSIDE the stdio app (the `stdio-chat` module of [`stdio-agent/`](stdio-agent/README.md)): it is scaffolding for that one front door, not an independently swappable integration, so it carries no package boundary of its own.
 
-`tool-ask-user` lives here because it is a model-facing product affordance that depends on a UI/provider seam; it is not part of the providerless core spine.
+`user-interaction` and `tool-ask-user` live here because asking a human is a UI-backed product affordance, not part of the providerless core spine. The seam remains provider-neutral (`ctx.userInteraction`), while the tool is the model-facing consumer and the app/bridge packages provide concrete providers.
 
 `stdio-agent` and `acp-agent` are the two **app packages**: each composes the [`core/agent-core`](../core/agent-core/README.md) spine with its coupled front-door cluster (and owns the boot `bin`), so a leaf `cordis.yml` is the swappable backends plus one app entry plus any optional product tools. They live in `ui/` because each IS a user-facing front door; the stdout-purity coupling (logger vs. no logger) becomes a property of the artifact rather than a leaf convention.

packages/ui/acp-agent/tsconfig.json

@@ -27,7 +27,7 @@
       "path": "../../core/agent-core"
     },
     {
-      "path": "../../core/user-interaction"
+      "path": "../user-interaction"
     },
     {
       "path": "../tool-ask-user"

packages/ui/acp/tsconfig.json

@@ -30,7 +30,7 @@
       "path": "../../core/tools"
     },
     {
-      "path": "../../core/user-interaction"
+      "path": "../user-interaction"
     },
     {
       "path": "../../session-persistence/session-persistence"

packages/ui/stdio-agent/tsconfig.json

@@ -33,7 +33,7 @@
       "path": "../../core/agent-core"
     },
     {
-      "path": "../../core/user-interaction"
+      "path": "../user-interaction"
     },
     {
       "path": "../tool-ask-user"

packages/ui/tool-ask-user/tsconfig.json

@@ -30,7 +30,7 @@
       "path": "../../core/tools"
     },
     {
-      "path": "../../core/user-interaction"
+      "path": "../user-interaction"
     }
   ]
 }

packages/ui/user-interaction/tsconfig.json

@@ -15,7 +15,7 @@
       "path": "../../../vendor/cordis"
     },
     {
-      "path": "../agent"
+      "path": "../../core/agent"
     },
     {
       "path": "../../llm/llm"