Archrompt — Local-First AI Prompt Engineering Workspace
Write prompts that say what you mean. Archrompt provides a private, offline-first prompt engineering environment that inspects structure, clarity, and constraints as you type — catching misunderstandings before they reach the model.
- Private by Default: Prompt text never leaves your device without explicit per-action consent.
- Offline-First Resilience: Full IndexedDB local storage operating reliably without an active internet connection.
- Model-Agnostic Design: Author structured instructions for any model or assistant.
- Deterministic Quality Floor: Instant rule-based metanalysis running locally with zero LLM hallucinations and zero added API cost.
Core Prompt Authoring Features
Archrompt bridges the gap between ad-hoc text input and rigorous prompt engineering with specialized authoring surfaces tailored to modern AI workflows.
Multi-Format Document Support
Author prompts in standard Markdown, structured XML blocks, or normalized JSON schema representations with instant, lossless format conversions.
- Markdown Editor: Syntax-aware prompt editing with real-time issue markers, token counting, and custom format templates.
- Structured Prompt Schema: Dedicated fields for Goal, Objectives, Context, Constraints, Output Format, and Few-Shot Examples.
- XML Fragment Generation: Clean XML output ready for injection into modern LLM system prompts without boilerplate wrappers.
Workspace & Asset Organization
Keep prompts, guidelines, and context organized inside project-scoped workspaces designed for repeatable engineering.
- Project Spaces: Isolate prompts, chat histories, memory items, and settings per project.
- Prefab Libraries: Reusable prompt blocks, system instructions, and standard guidelines inserted in one keystroke.
- Version Control & History: Track revisions locally and branch variations with instant diffs.
Deterministic Metanalysis Engine
Archrompt features an on-device, deterministic quality linter that identifies structural gaps and clarity defects before prompt execution — ensuring high consistency across model runs.
Real-Time Prompt Quality Signals
The metanalysis engine evaluates your draft against proven prompt engineering heuristics using pattern recognition and lexical analysis without remote API calls.
- Structural Completeness: Flags missing tasks, omitted source material, unstated output formats, and absent success criteria.
- Clarity & Specificity: Detects ambiguous terms, vague instructions, and conflicting constraints before the model guesses.
- Readability & Noise Reduction: Pinpoints repetitive phrasing, verbose filler, and cognitive overload that consume token budgets.
- Prompt Security & Boundaries: Identifies potential prompt injection vectors, delimiter collisions, and jailbreak susceptibility.
Local-First Architecture & Privacy
Unlike conventional AI web tools that stream every keystroke through a remote backend, Archrompt treats your device as the primary source of truth.
Client-Side Persistence & Control
Your prompts, projects, folders, and preferences reside directly within your local client environment.
- IndexedDB Storage: Zero cloud dependency for core application functions. All documents persist locally with near-zero latency.
- No Mandatory Accounts: Start authoring immediately without account creation, sign-ins, or credential setup.
- Zero Keystroke Telemetry: Your prompts are never tracked, logged, or analyzed on third-party servers while you type.
- JSON Data Portability: Export and restore full workspaces with complete fidelity for simple backups and team handoffs.
Multi-Platform Cross-Device Runtime
Archrompt is engineered to deliver native performance and unified state across web, desktop, and mobile platforms.
Web & Progressive Web App (PWA)
Accessible via modern web browsers with full offline capabilities powered by service workers and local caching.
Desktop Native (Electron)
Packaged application for Windows, macOS, and Linux featuring OS shortcuts, local file system access, and dedicated windows.
Mobile (Android via Capacitor)
Touch-optimized interface built for on-the-go prompt drafting with mobile keyboard ergonomics and native sharing.
Cloud AI & Server Workflows
When additional intelligence is needed, Archrompt unlocks hosted generative capabilities under strict user consent and transparent budgeting.
Consent-Gated Hosted Services
External model interactions are strictly optional, consent-gated, and metered through a unified credit pool.
- Cloud Chat Sessions: Multi-turn conversational prompt refining and critique powered by hosted cloud AI models.
- One-Click Automated Rewrites: Resolve flagged metanalysis findings with model-generated improvements applied directly to your draft.
- Multi-Space Cloud Synchronization: Synchronize workspaces and assets securely across all your authorized devices.
- Zero Data Retention: Cloud interactions execute under Google's Zero Data Retention terms — your prompt text is never stored or used for model training.
Transparent Pricing & Plans
The core prompt editor and deterministic metanalysis are completely free forever. Upgrades unlock hosted AI capabilities and multi-device cloud sync.
Free Tier
The complete local prompt editor with Markdown, XML, and structured editing, offline IndexedDB storage, deterministic metanalysis, and JSON backup/restore. No account required.
- Full prompt authoring environment
- Real-time deterministic metanalysis
- Offline IndexedDB persistence
- Default Space cloud sync (10 MB quota)
Solo Tier
Designed for professional prompt engineers requiring cloud AI assistance, multi-Space synchronization, and expanded storage.
- Everything in the Free tier
- Hosted cloud AI chat sessions
- Automated AI prompt rewrites and critique
- Multi-Space cloud sync across devices
- 1 GB account storage quota
- Unified monthly AI credit pool