chore: import upstream snapshot with attribution

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+# CLI Package
+
+The `trigger.dev` CLI package, published as `trigger.dev` on npm. Executable: `trigger`.
+
+## Dev vs Deploy
+
+### Dev Mode (`src/dev/`)
+Runs tasks locally in the user's Node.js process. No containers involved. Uses `src/dev/` for the dev command, connects to the local webapp for coordination.
+
+### Deploy Mode (`src/deploy/`)
+Bundles task code and builds Docker images for production:
+1. **Bundle**: `src/build/` bundles worker code using the build system
+2. **Archive**: `src/deploy/archiveContext.ts` packages files for deployment
+3. **Build image**: `src/deploy/buildImage.ts` creates Docker images (local Docker/Depot or remote builds)
+4. **Push**: Pushes image to registry, registers with webapp API
+
+## Customer Task Images
+
+Code in `src/entryPoints/` runs **inside customer containers** - this is a different runtime environment from the CLI itself. Changes here affect deployed task execution directly.
+
+The build system (`src/build/`) uses the config from `trigger.config.ts` in user projects to determine what to bundle, which build extensions to apply, and how to structure the output.
+
+## Commands
+
+CLI command definitions live in `src/commands/`. Key commands:
+- `dev.ts` - Local development mode
+- `deploy.ts` - Production deployment
+- `init.ts` - Project initialization
+- `login.ts` - Authentication
+- `promote.ts` - Deployment promotion
+
+## MCP Server
+
+`src/mcp/` provides an MCP server for AI-assisted task development.
+
+## SDK Documentation Rules
+
+The `rules/` directory at the repo root contains versioned SDK documentation that gets installed alongside customer projects. Update both `rules/` and `.claude/skills/trigger-dev-tasks/` when SDK features change.