# Build brief — a focused alternative to Pumble

> **Verdict:** Partly, if you narrow it · **Buildability:** 38/100 · **Category:** Community
> **Source:** https://www.canitbevibecoded.com/pumble
> Independent editorial assessment from Can It Be Vibe Coded? Not affiliated with, endorsed by, or derived from Pumble. Verify current pricing and capabilities before acting.

## Context

**Pumble** — Run straightforward team channels, direct messages, threads, and file sharing. It currently costs $2.99/mo.

The core loop is buildable, but a dependable replacement becomes a substantially larger project. For Pumble, run straightforward team channels, direct messages, threads, and file sharing. The hard boundary is cross-platform apps, push, guest access, admin controls, and hosted reliability, plus network, moderation, and communication infrastructure.

This brief describes a focused, single-operator replacement for the part of Pumble 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

Host a private team space with channels, direct messages, threads, and file sharing, and keep membership and moderation under the owner's control.

- Build a focused single-user workflow with real persistence, search, and export.
- A responsive interface with real empty, loading, success, and error states.

## Requirements

### Functional

- Docker.
- PostgreSQL.
- Public HTTPS deployment.
- Email provider.
- Object storage for attachments.

### 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 Pumble in an empty repository.
Use Next.js 15, TypeScript, PostgreSQL, Drizzle ORM, WebSockets, and Docker Compose; do not offer alternative stacks.
The core loop is: host a private team space with channels, direct messages, threads, and file sharing, and keep membership and moderation under the owner's control.
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.
Implement spaces, channels, topics, replies, reactions, mentions, profiles, roles, and invitations.
Use WebSockets for live updates but preserve every message transactionally in PostgreSQL.
Add moderation queues, reports, blocks, rate limits, attachment limits, and an audit log.
Provide email digests, browser notifications, search, pinned content, and member export.
Add owner-controlled retention, account deletion, backup, restore, and health checks.
Ship Docker Compose with a seeded demo, migrations, and an emergency admin 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 public-network discovery and existing member liquidity.
Deliberately leave out production voice or video rooms.
Deliberately leave out native mobile applications, enterprise SSO, and 24-hour abuse operations.
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:

- Cross-platform apps, push, guest access, admin controls, and hosted reliability.
- Network effects.
- Native mobile apps.
- Video and voice infrastructure.
- Permissions, presence, and shared workflows are difficult to simplify.
- Reliability at the vendor's scale is an operations problem, not a prompt.

## 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

**Operational risk.** The code is achievable; dependable data, integrations, and ongoing operations are the real cost.

Editorial confidence in this assessment: medium. No independent one-shot implementation is linked yet.

## Prior art

Working open-source software you can read, fork, or borrow from before starting:

- [Discourse](https://github.com/discourse/discourse) — Mature open-source community discussion platform with strong moderation and search

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Generated by [Can It Be Vibe Coded?](https://www.canitbevibecoded.com) · Full report: https://www.canitbevibecoded.com/pumble