/** * TextGeneration - Effect service contract for AI-generated Git content. * * Generates commit messages and pull request titles/bodies from repository * context prepared by Git services. * * @module TextGeneration */import { Context } from "effect";import type { Effect } from "effect";import type { ChatAttachment, ModelSelection } from "@t3tools/contracts"; import type { TextGenerationError } from "@t3tools/contracts"; /** Providers that support git text generation (commit messages, PR content, branch names). */export type TextGenerationProvider = "codex" | "claudeAgent" | "cursor" | "opencode"; export interface CommitMessageGenerationInput {  cwd: string;  branch: string | null;  stagedSummary: string;  stagedPatch: string;  /** When true, the model also returns a semantic branch name for the change. */  includeBranch?: boolean;  /** What model and provider to use for generation. */  modelSelection: ModelSelection;} export interface CommitMessageGenerationResult {  subject: string;  body: string;  /** Only present when `includeBranch` was set on the input. */  branch?: string | undefined;} export interface PrContentGenerationInput {  cwd: string;  baseBranch: string;  headBranch: string;  commitSummary: string;  diffSummary: string;  diffPatch: string;  /** What model and provider to use for generation. */  modelSelection: ModelSelection;} export interface PrContentGenerationResult {  title: string;  body: string;} export interface BranchNameGenerationInput {  cwd: string;  message: string;  attachments?: ReadonlyArray<ChatAttachment> | undefined;  /** What model and provider to use for generation. */  modelSelection: ModelSelection;} export interface BranchNameGenerationResult {  branch: string;} export interface ThreadTitleGenerationInput {  cwd: string;  message: string;  attachments?: ReadonlyArray<ChatAttachment> | undefined;  /** What model and provider to use for generation. */  modelSelection: ModelSelection;} export interface ThreadTitleGenerationResult {  title: string;} export interface TextGenerationService {  generateCommitMessage(    input: CommitMessageGenerationInput,  ): Promise<CommitMessageGenerationResult>;  generatePrContent(input: PrContentGenerationInput): Promise<PrContentGenerationResult>;  generateBranchName(input: BranchNameGenerationInput): Promise<BranchNameGenerationResult>;  generateThreadTitle(input: ThreadTitleGenerationInput): Promise<ThreadTitleGenerationResult>;} /** * TextGenerationShape - Service API for commit/PR text generation. */export interface TextGenerationShape {  /**   * Generate a commit message from staged change context.   */  readonly generateCommitMessage: (    input: CommitMessageGenerationInput,  ) => Effect.Effect<CommitMessageGenerationResult, TextGenerationError>;   /**   * Generate pull request title/body from branch and diff context.   */  readonly generatePrContent: (    input: PrContentGenerationInput,  ) => Effect.Effect<PrContentGenerationResult, TextGenerationError>;   /**   * Generate a concise branch name from a user message.   */  readonly generateBranchName: (    input: BranchNameGenerationInput,  ) => Effect.Effect<BranchNameGenerationResult, TextGenerationError>;   /**   * Generate a concise thread title from a user's first message.   */  readonly generateThreadTitle: (    input: ThreadTitleGenerationInput,  ) => Effect.Effect<ThreadTitleGenerationResult, TextGenerationError>;} /** * TextGeneration - Service tag for commit and PR text generation. */export class TextGeneration extends Context.Service<TextGeneration, TextGenerationShape>()(  "t3/git/Services/TextGeneration",) {}