feat(coding): add PI-105 product file host API

shared/coding-product-tools.ts

@@ -0,0 +1,100 @@
+import type { BundledCodingSkillId } from './coding-skills';
+
+export type CodingProjectFileStatus =
+  | 'added'
+  | 'modified'
+  | 'deleted'
+  | 'renamed'
+  | 'untracked';
+
+export interface CodingProjectFileEntry {
+  path: string;
+  name: string;
+  type: 'file';
+  status?: CodingProjectFileStatus;
+  size?: number;
+}
+
+export interface CodingProjectFileContent {
+  path: string;
+  content: string;
+  truncated: boolean;
+}
+
+export interface CodingTextSearchSubmatch {
+  text: string;
+  start: number;
+  end: number;
+}
+
+export interface CodingTextSearchResult {
+  path: string;
+  name: string;
+  lineNumber: number;
+  lineText: string;
+  submatches: CodingTextSearchSubmatch[];
+}
+
+export interface ConversationChangedFile {
+  path: string;
+  status: CodingProjectFileStatus;
+  diff?: string;
+  preview?: string;
+  truncated?: boolean;
+}
+
+export interface ConversationChangesSnapshot {
+  conversationId: string;
+  runId: string;
+  git: boolean;
+  baselineHead: string | null;
+  files: ConversationChangedFile[];
+}
+
+export interface ProductCodingSkill {
+  id: BundledCodingSkillId;
+  name: string;
+  description: string;
+  selected: boolean;
+}
+
+export interface ProductCodingCommand {
+  name: string;
+  title: string;
+  description: string;
+  source: 'makelore' | 'pi' | 'skill';
+  skillId?: BundledCodingSkillId;
+}
+
+export interface ProductPiCommandInput {
+  name: string;
+  description?: string;
+}
+
+export interface CodingFileStatusResponse {
+  files: CodingProjectFileEntry[];
+}
+
+export interface CodingFileFindResponse {
+  files: CodingProjectFileEntry[];
+}
+
+export interface CodingFileContentResponse {
+  file: CodingProjectFileContent;
+}
+
+export interface CodingTextSearchResponse {
+  matches: CodingTextSearchResult[];
+}
+
+export interface CodingSkillsResponse {
+  skills: ProductCodingSkill[];
+}
+
+export interface CodingCommandsResponse {
+  commands: ProductCodingCommand[];
+}
+
+export interface CodingChangesResponse {
+  changes: ConversationChangesSnapshot | null;
+}