Can Capacities be vibe coded?
Organize linked notes as typed objects such as people, books, meetings, and ideas
The core loop is small enough for a capable coding agent to produce a useful local version. For Capacities, organize linked notes as typed objects such as people, books, meetings, and ideas. The hard boundary is object-model polish, mobile capture, sync, calendar integration, and ai features, plus sync, collaboration, and capture polish.
Jump to the build brief ↓Checked Jul 2026
What you pay today, before any DIY hosting
high editorial confidence
Buildability by layer
Screens, forms, and focused interactions
The repeatable job the product performs
Availability and legality of required data
Uptime, queues, support, and maintenance
Security, compliance, and user confidence
The achievable core
- Capture linked notes as typed objects such as people, books, meetings, and ideas, search them instantly, surface backlinks, and export a normal Markdown folder.
- Capture, organise, search, link, and export personal notes.
- A responsive interface with real empty, loading, success, and error states.
The parts a prompt cannot buy
- object-model polish, mobile capture, sync, calendar integration, and AI features
- frictionless mobile capture
- real-time team editing
- hosted publishing
- The last 20 percent is sync, migration fidelity, speed, and edge cases.
Why people still pay
People still pay for Capacities because people keep paying when the note system is trusted across every device and disappears into their daily capture habits. The recurring cost buys file watching, conflict handling, indexing, mobile apps, encryption, backups, and migrations, not just the visible interface.
The last 20 percent is sync, migration fidelity, speed, and edge cases.
The brief
Context, requirements, acceptance criteria, non-goals, and the full production standard — as Markdown, ready for any coding agent.
Build brief — a focused alternative to Capacities
Context
**Capacities** — Organize linked notes as typed objects such as people, books, meetings, and ideas. It currently costs $12/mo.
The core loop is small enough for a capable coding agent to produce a useful local version. For Capacities, organize linked notes as typed objects such as people, books, meetings, and ideas. The hard boundary is object-model polish, mobile capture, sync, calendar integration, and ai features, plus sync, collaboration, and capture polish.
This brief describes a focused, single-operator replacement for the part of Capacities that is genuinely reproducible. It is deliberately narrower than the product it replaces, and it says so in writing. Build the useful core; do not pretend to have rebuilt the rest.
What you are building
Capture linked notes as typed objects such as people, books, meetings, and ideas, search them instantly, surface backlinks, and export a normal Markdown folder.
Capture, organise, search, link, and export personal notes.
A responsive interface with real empty, loading, success, and error states.
Requirements
Functional
MacOS, Windows, or Linux.
Local folder access.
Optional sync folder chosen by the user.
Non-functional
Accessibility: semantic markup, labelled controls, visible focus, and reduced-motion support.
Security: server-side secrets, validated input, and no credentials in the client bundle.
Reliability: retries with backoff on external calls, and a clear failure state when a provider is down.
Portability: the operator can export their data and leave without losing it.
Implementation brief
Build a personal replacement for Capacities in an empty repository.
Use Tauri 2, React, TypeScript, SQLite, and Markdown files as the source of truth; do not offer alternative stacks.
The core loop is: capture linked notes as typed objects such as people, books, meetings, and ideas, search them instantly, surface backlinks, and export a normal Markdown folder.
Make the first run work locally with one documented command.
Store all user data locally by default and make export straightforward.
Put secrets in .env, ship .env.example, and never commit credentials.
Store one Markdown file per note and a small SQLite index that can be rebuilt at any time.
Support wiki links, tags, backlinks, daily notes, pinned notes, and full-text search.
Add a fast command palette and keyboard-first create, rename, move, and link actions.
Render Markdown with task lists, code blocks, tables, and local image attachments.
Detect external file changes and show a safe conflict-resolution view.
Provide full-folder export, import, and an index-rebuild command.
Include clear empty, loading, success, and recoverable error states.
Add input validation, safe filenames, and graceful handling of unavailable APIs.
Write focused tests for the core transformation and one end-to-end happy path.
Create a README with setup, architecture, permissions, data location, and backup steps.
Do not add accounts, billing, telemetry, analytics, or a hosted control plane.
Deliberately leave out proprietary sync servers.
Deliberately leave out real-time multiplayer documents.
Deliberately leave out a plugin marketplace and hosted public sites.
Finish by running the tests and listing the exact commands used.
Delivery standard
Inspect the repository first, then write a short implementation plan before writing code.
Deliver the smallest complete end-to-end workflow first; every primary control must work against persisted data.
Use real validation and storage; never substitute fake dashboards, decorative controls, hard-coded success states, or mock integrations.
Include responsive layouts plus genuine empty, loading, success, validation, and failure states.
Keep secrets server-side in environment variables, provide .env.example, and never commit credentials or user data.
Add structured logs around every external call and return actionable errors without leaking sensitive details.
Write unit tests for the core logic and one automated test of the main user journey.
Finish with a README covering setup, architecture, data location, backups, tests, deployment, and known limitations.
Acceptance criteria
A clean install starts the app using only the README and .env.example.
The primary journey works from first visit through saved result, reload, edit, export, and deletion where applicable.
Invalid input, missing configuration, provider failure, and an empty database each have a usable state.
The interface works at 390px and 1440px, is keyboard navigable, and shows visible focus on every control.
Tests, type checking, linting, and a production build all pass with no ignored failures.
No part of the interface implies a live integration, security guarantee, or scale capability that was not actually built and verified.
Non-goals
Do not build these, and do not claim to have replaced them:
Object-model polish, mobile capture, sync, calendar integration, and AI features.
Frictionless mobile capture.
Real-time team editing.
Hosted publishing.
The last 20 percent is sync, migration fidelity, speed, and edge cases.
What you still own after launch
Run migrations, backups, restores, and dependency updates.
Test the critical journey after every model, API, or hosting change.
Monitor failures and fix the edge cases a first prompt will miss.
Risk
**Manageable.** A personal version is realistic if you test the critical journey and keep reliable backups.
Editorial confidence in this assessment: high. No independent one-shot implementation is linked yet.
Prior art
Working open-source software you can read, fork, or borrow from before starting:
[AppFlowy](https://github.com/AppFlowy-IO/AppFlowy) — Active open-source workspace with local-first documents and databases
Generated by [Can It Be Vibe Coded?](https://www.canitbevibecoded.com) · Full report: https://www.canitbevibecoded.com/capacities
You still own the product
- Run migrations, backups, restores, and dependency updates.
- Test the critical journey after every model, API, or hosting change.
- Monitor failures and fix the edge cases a first prompt will miss.
Open-source prior art
Before you start
Can Capacities be vibe coded?
Yes, for personal use. The core loop is small enough for a capable coding agent to produce a useful local version. For Capacities, organize linked notes as typed objects such as people, books, meetings, and ideas. The hard boundary is object-model polish, mobile capture, sync, calendar integration, and ai features, plus sync, collaboration, and capture polish.
What can an AI coding agent reproduce from Capacities?
Capture linked notes as typed objects such as people, books, meetings, and ideas, search them instantly, surface backlinks, and export a normal Markdown folder. Capture, organise, search, link, and export personal notes. A responsive interface with real empty, loading, success, and error states.
What will a DIY Capacities replacement still be missing?
object-model polish, mobile capture, sync, calendar integration, and AI features; frictionless mobile capture; real-time team editing; hosted publishing; The last 20 percent is sync, migration fidelity, speed, and edge cases.
What do I still own after building a Capacities alternative?
Run migrations, backups, restores, and dependency updates. Test the critical journey after every model, API, or hosting change. Monitor failures and fix the edge cases a first prompt will miss.