Merge remote-tracking branch 'origin/master' into worktree/web-multimodal-image-input

# Conflicts:
#	.agents/notes/implemented/architecture/2026-07-05-reconstructable-requests.i18n.yaml
#	docs/core-data-structures/core.i18n.yaml
#	docs/module-graph.md
#	packages/client/ui-conversation/src/client/chat/AssistantMarkdown.tsx
#	packages/client/ui-conversation/src/client/index.ts
#	packages/compact/compact-basic/README.i18n.yaml

packages/host/apiproxy/src/api/skills.schema.ts

@@ -14,6 +14,7 @@ export const skillEntrySchema = z.object({
   name: z.string().min(1),
   description: z.string(),
   whenToUse: z.string().optional(),
+  modelInvocable: z.boolean(),
 }) satisfies z.ZodType<Wire<SkillEntry>>
 
 /** skill.list request payload. */

packages/host/apiproxy/src/api/skills.ts

@@ -10,16 +10,24 @@ import type { RpcRequest, RpcResponse } from './rpc.ts'
 
 /** Skill catalog row (wire projection of the host SkillSummary; provider/source vocabulary stays host-side). */
 export interface SkillEntry {
-  /** Kebab-case identifier referenced as `<skill>name</skill>` in prompts. */
+  /** Kebab-case identifier the user references as `/name` in the composer. */
   readonly name: string
   /** Short routing description. */
   readonly description: string
   /** Optional extra routing guidance. */
   readonly whenToUse?: string
+  /** False marks a user-only skill (`disable-model-invocation`): invocable here, absent from the model catalog. */
+  readonly modelInvocable: boolean
 }
 
-/** Skill-domain unary methods (the map key skill.* of RpcMethodMap). */
+/**
+ * Skill-domain unary methods (the map key skill.* of RpcMethodMap). Listing
+ * is the domain's only RPC: invocation itself is a plain `session.prompt`
+ * whose leading `/name` token the host recognizes at the pre-step boundary
+ * (`dsh-tool-skill` injects the rendered body there), so every client shares
+ * one deterministic path with no dedicated invocation wire.
+ */
 export interface SkillsApi {
-  /** Lists skills usable by the browser's user-selected model-reference path. */
+  /** Lists the user-invocable skill catalog for the session's project. */
   list(request: RpcRequest<{ sessionId: SessionId }>): Promise<RpcResponse<{ skills: readonly SkillEntry[] }>>
 }