bloggen

instruqt

A TypeScript ESM module for AI agents and context engineering. This tool provides structured development workflows, configuration management, and utilities for building maintainable, scalable applications with comprehensive error handling.

Features

• Context Engineering: Structured approach to AI-assisted development
• TypeScript ESM Module: Modern module architecture with tree-shaking support
• Single Responsibility Principle: One function per file for maintainability
• Comprehensive Error Handling: Built with qerrors for robust error management
• Testing Framework: Integrated testing with qtests runner
• Configuration Management: Centralized constants and environment variables
• Universal I/O: All callable helpers accept a single data object and return objects

Quick Start

npm install
npm test
npm run build

Requirements

• Node.js 20+ recommended when using Google Gen AI SDK features (per @google/genai requirements). Core utilities that do not call the SDK work on earlier Node versions, but generating content/images requires Node 20+.

Migration Guide (Breaking Changes)

The following helper functions now follow the Universal I/O convention: they accept a single data object as input and return results as an object.

• buildTextPrompt

  • Before: buildTextPrompt(opts) → string
  • Now: buildTextPrompt({ opts }) → { prompt: string }
  • Example:
    • Before: const s = buildTextPrompt({ topic, author, minLinks, maxLinks, tone });
    • Now: const { prompt } = buildTextPrompt({ opts: { topic, author, minLinks, maxLinks, tone } });

• buildImagePrompt

  • Before: buildImagePrompt(title, topic) → string
  • Now: buildImagePrompt({ title, topic, style? }) → { prompt: string }
  • Example:
    • Before: const s = buildImagePrompt(title, topic);
    • Now: const { prompt } = buildImagePrompt({ title, topic, style: 'photo-realistic' });

• countLinks

  • Before: countLinks(html) → number
  • Now: countLinks({ html }) → { count: number }
  • Example:
    • Before: const n = countLinks(html);
    • Now: const { count } = countLinks({ html });

• extractImageFromParts

  • Before: extractImageFromParts(parts) → { mimeType, base64 } | null
  • Now: extractImageFromParts({ parts }) → { mimeType, base64 } | null

• generateStructuredPost

  • Before: generateStructuredPost(ai, model, prompt) → object
  • Now: generateStructuredPost({ ai, model, prompt }) → object

• generateHeroImage

  • Before: generateHeroImage(ai, model, prompt) → object
  • Now: generateHeroImage({ ai, model, prompt }) → object

Unchanged APIs

• buildBlogSchema() returns a JSON schema object.
• getLogger() returns an object with info, warn, error methods.

Rationale

• Aligns all public helpers with the repo’s Universal I/O pattern.
• Improves future extensibility and call-site clarity.

Architecture

• /lib - Core functionality with single-responsibility functions
• /config - Configuration files and environment management
• /tests - Integration tests and test setup
• /agentRecords - AI agent work records and documentation

Public API

• Functions:
  • generateBlog(data) → Promise<BlogPost>
  • createGenerateBlog(deps) → (data) => Promise<BlogPost> (factory for DI + reuse)
  • buildTextPrompt({ opts }) → { prompt: string }
  • buildImagePrompt({ title, topic, style? }) → { prompt: string }
  • countLinks({ html }) → { count: number }
  • extractImageFromParts({ parts }) → { mimeType: string; base64: string } | null
  • buildBlogSchema() → schema object
  • getLogger() → { info, warn, error }
  • generateStructuredPost({ ai, model, prompt }) → object
  • generateHeroImage({ ai, model, prompt }) → { mimeType, base64 }

Privacy & Logging

• This module does not persist or transmit user data beyond returning results to the caller. However, the high‑level generateBlog function performs informational logging by default (e.g., topic and author) through the qerrors logger.
• For compliance‑sensitive use cases (GDPR/CCPA, internal privacy policies), prefer generateBlogCore and inject a logger that redacts or suppresses PII. Example: { logger: { info: () => {}, warn: () => {}, error: console.error } }.
• Consumers are responsible for consent, data subject requests, and log retention policies in their applications.

Error Handling Guidance

• Library functions may throw errors with descriptive messages (e.g., missing configuration). Treat these as server‑side diagnostics. Do not pass raw error messages directly to end users.
• Recommended pattern:
  • Catch errors, log details server‑side with a correlation ID, and return a generic error message to clients.
  • For advanced control, use generateBlogCore and inject a logger and error wrapper that align with your organization’s standards.

Runtime Dependencies

• Published artifacts are limited to dist/ (see exports and files in package.json). Demo/server code is not published.
• Runtime dependencies for consumers are kept minimal (e.g., @google/genai, qerrors). Demo/server tooling (e.g., express, winston) lives in devDependencies to reduce supply‑chain surface for module users.

Configuration & Environment

The module can infer provider configuration from environment variables if cfg is omitted in generateBlog({ opts, cfg }):

• GOOGLE_GENAI_USE_VERTEXAI: 'true' | 'false' — when 'true', Vertex AI is used; otherwise AI Studio API key is used.
• GOOGLE_CLOUD_PROJECT: GCP project ID for Vertex AI.
• GOOGLE_CLOUD_LOCATION: GCP region (defaults to 'us-central1').
• GEMINI_API_KEY: AI Studio API key (server-side only).

Defaults used when not specified via opts/env:

• Text model: 'gemini-2.5-flash'
• Image model: 'gemini-2.5-flash-image-preview'
• Author: 'Anonymous'
• Min/Max links: 3 / 5

Usage

import {
  generateBlog,
  buildTextPrompt,
  buildImagePrompt,
  countLinks,
  extractImageFromParts
} from 'bloggen';

// Generate a full blog post
const post = await generateBlog({
  opts: { topic: 'X', author: 'A', minLinks: 3, maxLinks: 5, tone: 'friendly', style: 'photo-realistic' },
  cfg: { useVertexAI: false, apiKey: process.env.GEMINI_API_KEY! }
});

// Use helpers directly
const { prompt: textPrompt } = buildTextPrompt({
  opts: { topic: 'X', author: 'A', minLinks: 3, maxLinks: 5 }
});
const { prompt: imagePrompt } = buildImagePrompt({ title: 'T', topic: 'X', style: 'watercolor' });
const { count } = countLinks({ html: post.html });

Demo Server

A simple demo server is included to exercise the API from a browser UI.

Run:

node server.js

Open: http://localhost:5000/ (default port 5000)

Endpoints exposed and used by the demo UI:

• POST /api/generate-blog
  • Optional: set returnImageUrl=true (query or body) to return imageUrl instead of inline base64 image
• POST /api/util/build-text-prompt
• POST /api/util/build-image-prompt
• POST /api/util/count-links
• GET /api/util/build-blog-schema
• POST /api/util/extract-image-from-parts
• POST /api/util/generate-structured-post
• POST /api/util/generate-hero-image
• GET /api/util/generate-hero-image-binary (binary streaming variant)
• GET /health

Static assets are served from public/ (demo HTML/JS lives there) with ETag and Cache-Control: max-age=3600; / redirects to /demo.html.

Transport options for images (Demo only)

• Default response from /api/generate-blog includes { image: { mimeType, base64, alt } }.
• For lower payload size and better performance in the demo, use returnImageUrl=true to receive an imageUrl pointing to GET /api/util/generate-hero-image-binary?model=...&prompt=..., which streams image/* bytes with cache headers.
  • Note: These HTTP endpoints are part of the demo server only; the npm module does not expose HTTP routes.

Performance Notes

• The GenAI SDK is lazy‑loaded only when needed by generateBlog, reducing cold‑start time and baseline memory when consumers import this package but only use pure helpers.

HTTP Meta (.meta)

• Each exported endpoint function carries a .meta object for host frameworks to auto‑wire routes, auth, and validation.
• Highlights:
  • POST /api/generate-blog → requires user role, apiKeyRequired: true with Zod schema for { opts, cfg }.
  • POST /api/util/generate-structured-post → user + API key; { model, prompt } schema.
  • POST /api/util/generate-hero-image → user + API key; { model, prompt } schema.
  • POST /api/util/build-text-prompt → public; { opts } schema.
  • POST /api/util/build-image-prompt → public; { title, topic, style? } schema.
  • POST /api/util/count-links → public; { html } schema.
  • GET /api/util/build-blog-schema → public; no input schema.

Hosts that support .meta can use these to enforce role checks, validate inputs via Zod, and generate API docs automatically.

Context Engineering

The rules folders for Cline Code & Kilocode are symlinked to the folder for Roo Code rules. 00-general.md in Roo Code rules is symlinked to AGENTS.md

ln -s "$(pwd)/.roo/rules" "$(pwd)/.kilocode/rules"

ln -s "$(pwd)/.roo/rules" "$(pwd)/.clinerules/"

ln -s "$(pwd)/AGENTS.md" "$(pwd)/.roo/rules/00-general.md"

Replacement Installation of other apps (only to over-write this project entirely, in order to get them Replit Agent)

git remote set-url origin https://github.com/yourusername/yourrepo.git

git remote -v

git fetch

git reset origin/main --hard