refactor(packages): dissolve ui/ and rename sdk/ to scaffold/

git mv per the regrouping RFC: the five human-collaboration seams and
tui join packages/interaction/, app-boot becomes packages/boot/, and
jsonrpc joins the renamed scaffold/ (formerly sdk/) as its server half
beside client/protocol/create-sdk/helper/scripts/telemetry, whose
folders drop the legacy sdk- prefix. Three new group README triplets
replace the ui/ and sdk/ ones; tsconfig references/paths/globs,
knip keys, vitest globs, gate scripts, catalogs, docs, and the
lockfile follow. Adds the four settled FIXME rename markers
(dsh-sdk-server, dsh-sdk-telemetry, dsh-sdk-helper, dsh-sdk-scripts).

The scaffold folders diverge from their npm names until those renames
land, so tsconfig.base.json maps the three affected names explicitly
beside the group wildcard. Also repairs two pre-existing stale-path
classes the strengthened sweep surfaced: docs/web-styling.md's retired
web-ui host package and type-model spec fixture-literal joins.

app-boot's three Loader-composition specs time out at the default 5s
under full-suite parallel load on this filesystem (pre-existing;
pass isolated with --testTimeout=30000); interaction/scaffold/boot
suites otherwise green (687 passed).

packages/interaction/user-interaction/src/index.ts

@@ -0,0 +1,143 @@
+/**
+ * User-interaction seam (`ctx.userInteraction`): a UI-backed service for
+ * pausing an agent tool call until the human answers a question. The model-
+ * facing tool lives in `@deepseek-ai/dsh-tool-ask-user`; UI packages provide
+ * the single active provider.
+ *
+ * @module @deepseek-ai/dsh-user-interaction
+ */
+
+import { Context, Service } from 'cordis'
+import type { Agent } from '@deepseek-ai/dsh-agent'
+import { HarnessError } from '@deepseek-ai/dsh-llm'
+
+declare module 'cordis' {
+  interface Context {
+    userInteraction: UserInteractionService
+  }
+}
+
+import type { AskUserQuestionAnswer, AskUserQuestionItem } from './types.ts'
+
+export type {
+  AskUserQuestionAnswer, AskUserQuestionAnswerItem, AskUserQuestionIntent, AskUserQuestionItem,
+  AskUserQuestionOption,
+} from './types.ts'
+
+/** Request for a human answer. */
+export interface AskUserQuestionRequest {
+  /** Questions to display. */
+  questions: AskUserQuestionItem[]
+  /** Exact live calling agent, when the request came from an agent tool call. */
+  agent?: Agent
+  /** Abort signal for the owning tool/step. */
+  signal?: AbortSignal
+}
+
+/** UI-side provider for user questions. */
+export interface UserInteractionProvider {
+  ask(request: AskUserQuestionRequest): Promise<AskUserQuestionAnswer>
+}
+
+/** Stable error taxonomy for user-interaction failures. */
+export class UserInteractionError extends HarnessError {
+  constructor(message: string, code: string, options?: ErrorOptions) {
+    super(message, code, options)
+    this.name = 'UserInteractionError'
+  }
+}
+
+/** `ctx.userInteraction`: one active UI provider plus an `ask()` surface. */
+export class UserInteractionService extends Service {
+  private provider: UserInteractionProvider | undefined
+
+  constructor(ctx: Context) {
+    super(ctx, 'userInteraction')
+  }
+
+  /**
+   * Register the UI provider. Only one provider may be active in a context.
+   *
+   * @param provider UI-side implementation that collects answers.
+   * @returns Disposer that unregisters this provider.
+   */
+  registerProvider(provider: UserInteractionProvider): () => void {
+    const dispose = this.ctx.effect(function* (this: UserInteractionService) {
+      if (this.provider !== undefined) {
+        throw new UserInteractionError('a user-interaction provider is already registered', 'DUPLICATE_PROVIDER')
+      }
+      this.provider = provider
+      yield () => {
+        this.provider = undefined
+      }
+    }.bind(this), 'userInteraction.registerProvider()')
+    return () => void dispose()
+  }
+
+  /**
+   * Ask the active UI provider and wait for the user's answer.
+   *
+   * When a caller supplies an agent, human interaction is valid only for the
+   * exact live runtime root. Runtime ownership, not durable session lineage,
+   * decides this boundary: an owned child has no human answerer and would
+   * block forever, while a lineage-bearing session resumed as a new runtime
+   * root may ask normally.
+   *
+   * @param request Questions, owner agent, and abort signal.
+   * @returns The answer chosen or typed by the human.
+   * @throws {UserInteractionError} code `CALLER_NOT_LIVE` when a supplied
+   *   agent is not the registry's exact live instance, or `DELEGATED_CALLER`
+   *   when that live agent is owned by another agent.
+   */
+  async ask(request: AskUserQuestionRequest): Promise<AskUserQuestionAnswer> {
+    if (request.signal?.aborted) {
+      throw new UserInteractionError('ask_user_question was aborted before the user answered', 'ASK_ABORTED')
+    }
+    if (request.questions.length === 0) {
+      throw new UserInteractionError('ask_user_question requires at least one question', 'EMPTY_QUESTIONS')
+    }
+    const agent = request.agent
+    if (agent !== undefined) {
+      const agents = this.ctx.get('agents')
+      if (agents === undefined || agents.get(agent.id) !== agent) {
+        throw new UserInteractionError(
+          'human interaction requires the exact live calling agent when an agent is supplied',
+          'CALLER_NOT_LIVE')
+      }
+      if (!agents.roots().includes(agent)) {
+        throw new UserInteractionError(
+          'human interaction is unavailable while the calling agent is owned by another live agent; '
+          + "include the unresolved question or decision in the child agent's final result",
+          'DELEGATED_CALLER')
+      }
+    }
+    // A presentation intent asserts two things the types cannot: that the
+    // named approve label is one of this question's own options, and that a
+    // plan-review carries the plan it is a review of. A UI honouring the
+    // intent answers with that label, and shows that detail as the plan, so
+    // either gap would put a choice the asker never offered — or an approval of
+    // something invisible — in front of the user. Caught at the asker, where
+    // the mistake is, rather than in each UI.
+    for (const question of request.questions) {
+      const intent = question.intent
+      if (intent === undefined) continue
+      if (!(question.options ?? []).some(option => option.label === intent.approve)) {
+        throw new UserInteractionError(
+          `question ${question.id} declares intent ${intent.kind} whose approve label `
+          + `${JSON.stringify(intent.approve)} names none of its options`,
+          'BAD_INTENT')
+      }
+      if (question.detail === undefined) {
+        throw new UserInteractionError(
+          `question ${question.id} declares intent ${intent.kind} without the detail it reviews`,
+          'BAD_INTENT')
+      }
+    }
+    if (this.provider === undefined) {
+      throw new UserInteractionError('no user-interaction provider is registered', 'NO_PROVIDER')
+    }
+    return this.provider.ask(request)
+  }
+}
+
+export default UserInteractionService

packages/interaction/user-interaction/src/invariant.ts

@@ -0,0 +1,30 @@
+/**
+ * Package-owned invariant companion for `@deepseek-ai/dsh-user-interaction`.
+ * @module @deepseek-ai/dsh-user-interaction/invariant
+ */
+
+/* jscpd:ignore-start */
+import type { Context } from 'cordis'
+import type { InvariantInstaller } from '@deepseek-ai/dsh-invariants'
+
+const PACKAGE_NAME = '@deepseek-ai/dsh-user-interaction'
+
+/** Cordis companion plugin name. */
+export const name = 'user-interaction-invariant'
+/** Service required before the companion can reserve package ownership. */
+export const inject = ['invariants']
+
+/**
+ * No runtime invariant: the single provider slot is validated at registration and asks return
+ * directly to their caller; the seam publishes no independent request/answer audit stream.
+ */
+const install: InvariantInstaller = () => {}
+
+/**
+ * Register this package's invariant companion.
+ * @param ctx - Cordis context carrying the invariant service.
+ * @returns the installed registration's disposer after setup succeeds.
+ */
+export const apply = (ctx: Context): Promise<() => void> =>
+  Promise.resolve(ctx.invariants.register(PACKAGE_NAME, install))
+/* jscpd:ignore-end */

packages/interaction/user-interaction/src/types.ts

@@ -0,0 +1,66 @@
+/**
+ * Wire-safe question/answer shapes, free of cordis/service imports so browser
+ * type chains (apiproxy api → client) can consume them without loading this
+ * package's Context augmentation.
+ * @module @deepseek-ai/dsh-user-interaction/types
+ */
+
+/** One selectable answer offered to the user. */
+export interface AskUserQuestionOption {
+  /** User-facing label. */
+  label: string
+  /** Optional extra context rendered by capable UIs. */
+  description?: string
+}
+
+/**
+ * A caller-declared presentation intent: the question IS a decision of this
+ * shape, so a UI that recognises the tag may present it as such instead of as a
+ * generic option list. Tagged so further intents can be added; a UI that does
+ * not know a tag renders the generic flow, and the answer encoding is identical
+ * either way — an intent shapes presentation only, never the protocol.
+ */
+export type AskUserQuestionIntent = {
+  /** A plan submitted for review: `detail` is the plan markdown `ask()` requires, and the decision approves or declines it. */
+  kind: 'plan-review'
+  /**
+   * The option label that approves the plan; every other option declines it.
+   * Named rather than positional so no UI infers the verdict from option order.
+   * An `approve` naming no option of its own question is rejected at `ask()`.
+   */
+  approve: string
+}
+
+/** One question in a user-interaction request. */
+export interface AskUserQuestionItem {
+  /** Stable caller-provided question id, echoed in the answer. */
+  id: string
+  /** The question to display. */
+  question: string
+  /** Optional supporting detail rendered with the question but kept out of option labels. */
+  detail?: string
+  /** Optional short heading/group label. */
+  header?: string
+  /** Optional choices the UI can render as a menu. */
+  options?: AskUserQuestionOption[]
+  /** Whether more than one option may be selected. Defaults to single-select. */
+  multiSelect?: boolean
+  /** Optional presentation intent for capable UIs; absent asks for the generic option list. */
+  intent?: AskUserQuestionIntent
+}
+
+/** Answer to one question. */
+export interface AskUserQuestionAnswerItem {
+  /** The answered question id. */
+  id: string
+  /** Selected option labels. May accompany custom text for a multi-select question. */
+  selected: string[]
+  /** Optional free-text "Other" answer. */
+  custom?: string
+}
+
+/** The human's answer. */
+export interface AskUserQuestionAnswer {
+  /** Structured answers keyed by question id. */
+  answers: AskUserQuestionAnswerItem[]
+}