refactor(acp): reduce bridge to automation protocol

packages/ui/commands/README.md

@@ -1,10 +1,10 @@
 # @deepseek-ai/dsh-commands
 
-Plugin-owned human-command registry shared by the TUI and ACP adapters. The [plugin command registration Agent Note](../../../.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.md) owns the boundary and protocol mapping.
+Plugin-owned human-command registry consumed by interactive UI adapters. The [plugin command registration Agent Note](../../../.agents/notes/implemented/feature/2026-07-19-plugin-command-registration.md) owns the boundary and dispatch contract.
 
 ## Service contract
 
-`ctx.commands.register(definition)` registers one lowercase command name, description, optional ACP-compatible unstructured-input hint, and abortable handler. A registered command is available to every composed command adapter; a plugin that is incompatible with a deployment does not register there. A plain-context registration is global. A command-producing plugin mounted beneath `agent.ctx` declares its own `commands` injection and creates an exact agent-scoped definition; it shadows a global definition with the same name. This child-injection shape preserves the agent scope without making the core agent loop depend on a UI service. Duplicate names within one layer fail during registration. Every disposer is the exact Cordis effect disposer, and registration or removal notifies every `commands/change` observer so live adapters can refresh discovery; observer failures are logged and cannot veto the registry mutation or starve later observers.
+`ctx.commands.register(definition)` registers one lowercase command name, description, optional unstructured-input hint, and abortable handler. A registered command is available to every composed command adapter; a plugin that is incompatible with a deployment does not register there. A plain-context registration is global. A command-producing plugin mounted beneath `agent.ctx` declares its own `commands` injection and creates an exact agent-scoped definition; it shadows a global definition with the same name. This child-injection shape preserves the agent scope without making the core agent loop depend on a UI service. Duplicate names within one layer fail during registration. Every disposer is the exact Cordis effect disposer, and registration or removal notifies every `commands/change` observer so live adapters can refresh discovery; observer failures are logged and cannot veto the registry mutation or starve later observers.
 
 `list(agent)` returns immutable, name-sorted descriptors after scoped shadowing. `find(agent, name)` returns the corresponding definition. `execute(agent, line, signal)` uses `parseCommand()` and runs only a known command, returning `undefined` for invalid syntax or unknown names.
 
@@ -14,7 +14,7 @@ Handlers return `success` or `error` plus optional UI text. Results are rendered
 
 ## Composition
 
-The terminal and ACP app bundles mount this service with their consuming front door; the UI-less agent spine does not. Custom compositions that use `dsh-tui`, `dsh-acp`, or a command producer mount `@deepseek-ai/dsh-commands` explicitly.
+The terminal app bundle mounts this service with `dsh-tui`; the UI-less agent spine and ACP automation app do not. Custom interactive compositions and command producers mount `@deepseek-ai/dsh-commands` explicitly.
 
 ## Model Experience
 
@@ -34,6 +34,6 @@ Registry metadata, command input, and direct output never enter a model request
 
 ## Known Limitations and Deferred Work
 
-- **Only unstructured text input** — the descriptor intentionally matches ACP's current unstructured command input; forms, completion schemas, and typed arguments remain command-owned parsing concerns.
+- **Only unstructured text input** — forms, completion schemas, and typed arguments remain command-owned parsing concerns.
 - **No persisted command output** — adapters display results live, but the generic registry does not add them to the session log or reconstruct them after reconnect.
 - **Cooperative side-effect cancellation** — dispatch stops awaiting on abort; handlers must honor the signal to stop work that has already escaped into external systems.

packages/ui/commands/src/index.ts

@@ -12,7 +12,7 @@ export const name = 'commands'
 
 const COMMAND_NAME = /^[a-z][a-z0-9_-]*$/u
 
-/** Immutable command input metadata compatible with ACP unstructured input. */
+/** Immutable metadata for a command's optional unstructured input. */
 export interface CommandInputDescriptor {
   /** Placeholder shown before the user supplies free-form input. */
   readonly hint: string