Marketing · Weekend build
Build your own Buffer
A queue, a calendar, and your own terrible posts. Buffer charges $18–$36 per month — that’s $216–$432 a year — for something you can replace with focused software of your own. Here is the honest scope, the honest timeline, and the exact prompt to hand your coding agent.
Who this replacement is for
This build targets one creator publishing to two social accounts. The goal: draft posts, see the schedule, and publish automatically at the chosen time. If you need more than that, keep paying — the point of building it yourself is owning a tool shaped exactly like your workflow, not re-implementing a venture-funded roadmap.
Same build, different logo: this v1 also replaces Typefully, Hypefury and Later — they all solve the same core job.
How long it actually takes
One number would be a lie, so here are three. Each tier is a real, usable product — pick the one that matches how much of Buffer you actually use.
| Estimate | What you get |
|---|---|
| 8 hours | post queue, one network, scheduled publish |
| 3 days | calendar drag-reschedule, previews, retries, second network |
| 1 month+ | every network api, approvals, analytics, ai writing — the part you should probably skip |
What a minimal Buffer alternative needs
- draft, queued, published, and failed post states
- a weekly calendar with drag-to-reschedule
- text, link, and one-image attachments
- per-channel previews and character warnings
- retry controls and a readable publishing log
Data model
Channel, Post, MediaAsset, PublishAttempt
Integrations
one social network API first, Cloudflare Cron Triggers
Capability context
Astro, Workers, R2
The guardrail
Encrypt provider tokens and make publishing jobs idempotent.
Deliberate non-goals
Do not add AI writing, social listening, approval workflows, or every network in v1.
The complete build prompt
Copy this into your coding agent of choice. It is scoped for a useful v1 — journeys, screens, business rules, data model, security, tests, and acceptance scenarios included. Pick your stack:
You are building a production-ready software product named “Queuebird”, a deliberately focused alternative to Buffer. Build a complete, usable vertical slice—not a landing page, static mockup, or disconnected collection of components. WORKING AGREEMENT Before writing implementation code, produce a short technical plan that names the routes or pages, server actions or endpoints, data tables, important state transitions, authorization boundaries, background jobs, and external adapters. Resolve contradictions in favor of the narrow audience and non-goals below. Prefer a small, legible architecture over speculative abstraction, but do not omit persistence, validation, error handling, or tests. PRODUCT BRIEF Primary user: one creator publishing to two social accounts. Primary outcome: draft posts, see the schedule, and publish automatically at the chosen time. Product principle: optimize the exact workflow below instead of copying the full breadth of Buffer. A first-time user should understand what to do from the interface itself, without a tour or documentation. END-TO-END USER JOURNEYS Implement all of these flows through the real interface and persistent data layer: 1. The owner connects a supported social account, defines recurring queue times, drafts a post, previews it, and adds it to the next open slot. 2. The owner drags a queued post to a different day, resolves a channel-specific length warning, and confirms the new publish time. 3. A scheduled job publishes the post, records the provider response, and either marks success or exposes a retryable failure with a useful reason. SCREENS AND INFORMATION ARCHITECTURE Build these as coherent responsive views. Each screen must specify its primary action, secondary actions, visible status, validation feedback, empty state, loading or pending state, success confirmation, and recoverable failure state. 1. Calendar: week view, channel filter, queue slots, drafts, scheduled posts, published markers, failures, and drag-to-reschedule feedback. 2. Composer: channel selector, text, link, image upload, per-channel preview, character count, schedule choice, and save-draft action. 3. Queue settings: timezone, recurring time slots per weekday, connected accounts, token health, and disconnect controls. 4. Publishing log: post, target channel, attempt time, status, provider message, retry count, and safe manual retry. CORE CAPABILITIES 1. draft, queued, published, and failed post states 2. a weekly calendar with drag-to-reschedule 3. text, link, and one-image attachments 4. per-channel previews and character warnings 5. retry controls and a readable publishing log DETAILED BEHAVIOR AND BUSINESS RULES Treat these as server-enforced product requirements, not interface suggestions: 1. Every post targets one connection in v1; validate text length, media type, dimensions, and publish time before it enters the queue. 2. Assign a stable idempotency key to each scheduled publication and never publish twice after worker retries or uncertain provider responses. 3. Moving or deleting a post must atomically release its old slot; display all scheduling in the owner’s configured timezone. 4. Refresh provider credentials server-side, encrypt stored secrets, and pause the queue with a visible reconnect state when authorization fails. DATA MODEL AND LIFECYCLE Design a small relational schema centered on Channel, Post, MediaAsset, PublishAttempt. Before implementing it, document: 1. Each table’s purpose, primary key, ownership or tenant boundary, timestamps, status fields, and important attributes. 2. Foreign keys, uniqueness constraints, check constraints, indexes needed by the named screens, and transaction boundaries for multi-record changes. 3. The allowed lifecycle or state transitions, who may trigger each transition, which transitions are terminal or reversible, and what audit history must remain immutable. 4. Archive, retention, and deletion behavior, including what happens to dependent records and external files. 5. Idempotency strategy for submissions, jobs, imports, notifications, webhooks, or retries where applicable. Use migrations rather than ad-hoc schema creation. Store time instants consistently and retain named timezone context whenever local schedules or dates matter. Never rely on a counter, disabled button, or client-side check to preserve a business invariant. USERS, AUTHENTICATION, AND PERMISSIONS Implement only the roles required by the stated audience. Make the ownership and visibility model explicit before coding. Enforce authorization in every server-side query and mutation, including search, exports, attachments, live updates, and guessed URLs—not merely by hiding controls. Use secure session defaults, protect state-changing requests, and provide an understandable signed-out, expired-session, and forbidden state. Seed distinct users when multiple roles are required so permissions can be demonstrated and tested. INTERACTION AND VISUAL DIRECTION The product should feel fast, calm, focused, and credible rather than like a generic admin template. Use a clear visual hierarchy, restrained color, readable typography, generous hit targets, and consistent placement for primary actions. Start with server-rendered HTML and progressively enhance only the interactions that benefit from it. The core workflow must remain understandable if enhancement fails. Start with server-rendered Astro pages and ordinary HTML forms. Use HTMX for form submissions, partial navigation, and server-driven updates, then Alpine.js only for small local browser state. The core workflow must remain understandable if either enhancement layer fails. Design mobile layouts intentionally instead of simply stacking desktop panels. Support keyboard navigation, visible focus, semantic landmarks, explicit labels, useful page titles, reduced-motion preferences, and screen-reader announcements for asynchronous results. Never use color alone to communicate state. Destructive actions require clear scope and confirmation; safe repeated actions should be idempotent. TECHNICAL DIRECTION Build this version with the AHA stack: Astro for routing, layouts, and server-rendered pages; HTMX for interactions that benefit from HTML fragment responses; and Alpine.js for small, local interface state. Prefer Cloudflare D1 for relational persistence, R2 for object storage, Workers for server endpoints and scheduled work, Durable Objects only for coordinated real-time state, and Workflows or Queues for durable background jobs—but only when the product requirements call for them. Keep domain rules in testable server-side modules instead of route handlers or UI components. Separate persistence, external providers, and background work behind small interfaces without building a framework. Prefer ordinary HTML forms and URLs for durable navigation; use optimistic interaction only when failure can be reconciled clearly. The product brief currently identifies Astro, Workers, R2 as capability context. Preserve any required native, browser-only, edge, storage, real-time, or background-processing capability through a narrow adapter appropriate to the selected framework. If the core workflow genuinely requires native or browser APIs, keep that runtime as the primary execution surface rather than simulating inaccessible capabilities or inventing an unnecessary web surface. Integrate with one social network API first and Cloudflare Cron Triggers. For every integration: - List required environment variables in an .env.example without real secrets. - Add a small adapter with timeouts, normalized errors, and a deterministic local fake or development path. - Verify inbound signatures and deduplicate provider events where supported. - Keep credentials server-side, encrypt long-lived provider tokens at rest, and redact secrets and sensitive payloads from logs. - Define retry, backoff, and idempotency behavior for any side effect that can be repeated. SECURITY AND PRIVACY Encrypt provider tokens and make publishing jobs idempotent. Validate, normalize, and length-limit all untrusted input on the server. Escape rendered content by default, sanitize any intentionally accepted markup, rate-limit public or abuse-prone actions, and use private object storage plus short-lived authorized URLs for sensitive files. Collect the minimum personal data necessary for the named workflow. Document retention and deletion behavior. Add specific protections for the riskier surfaces in this app, such as uploads, redirects, outbound requests, email delivery, OAuth, webhooks, CSV import or export, and real-time connections. ACCEPTANCE SCENARIOS Automate these app-specific scenarios at the most appropriate level: 1. A queued post publishes once at the intended instant and moves from calendar queue to published history with the provider URL. 2. An expired token marks the attempt as authorization failed, leaves the post recoverable, and guides the owner to reconnect before retrying. 3. Dragging one post onto an occupied queue slot offers swap or choose-another-time behavior instead of silently overwriting either post. TESTING Add focused unit tests for state transitions, authorization predicates, normalization, date or money calculations, and other risky domain rules. Add integration tests for persistence constraints and each external adapter’s success, timeout, retry, and rejection paths. Add at least one browser-level test for every end-to-end journey above, including one small-screen viewport. Tests must use isolated data and run through a documented single command. OPERATIONS AND FAILURE RECOVERY Add structured server logs with request, job, or event correlation IDs but no secrets or unnecessarily sensitive data. Make failures actionable in both the interface and logs. Background work must expose pending, succeeded, failed, and retrying states where relevant; do not silently swallow errors. Include safe database migration and rollback guidance, seed data, backup and restore notes, external-data cleanup behavior, and a basic health or diagnostic path appropriate to the stack. DELIVERABLES Ship the working application, migrations, representative seed data, tests, .env.example, and a concise README. The README must cover prerequisites, local setup, environment variables, migrations, seed and test commands, deployment, integration setup, backup and restore, security decisions, and known limitations. Seed data should exercise the happy path plus at least one empty, failed, overdue, expired, archived, or permission-restricted state relevant to the product. DEFINITION OF DONE The app is complete when a fresh developer can follow the README, create and migrate the database, run the app, sign in as each relevant role, complete every named journey using real persisted data, refresh without losing state, recover from common failures, and use the core interface on phone and desktop. All acceptance scenarios pass, permission boundaries are covered by tests, and no core screen is left as a placeholder. NON-GOALS Do not add AI writing, social listening, approval workflows, or every network in v1.
You are building a production-ready software product named “Queuebird”, a deliberately focused alternative to Buffer. Build a complete, usable vertical slice—not a landing page, static mockup, or disconnected collection of components. WORKING AGREEMENT Before writing implementation code, produce a short technical plan that names the routes or pages, server actions or endpoints, data tables, important state transitions, authorization boundaries, background jobs, and external adapters. Resolve contradictions in favor of the narrow audience and non-goals below. Prefer a small, legible architecture over speculative abstraction, but do not omit persistence, validation, error handling, or tests. PRODUCT BRIEF Primary user: one creator publishing to two social accounts. Primary outcome: draft posts, see the schedule, and publish automatically at the chosen time. Product principle: optimize the exact workflow below instead of copying the full breadth of Buffer. A first-time user should understand what to do from the interface itself, without a tour or documentation. END-TO-END USER JOURNEYS Implement all of these flows through the real interface and persistent data layer: 1. The owner connects a supported social account, defines recurring queue times, drafts a post, previews it, and adds it to the next open slot. 2. The owner drags a queued post to a different day, resolves a channel-specific length warning, and confirms the new publish time. 3. A scheduled job publishes the post, records the provider response, and either marks success or exposes a retryable failure with a useful reason. SCREENS AND INFORMATION ARCHITECTURE Build these as coherent responsive views. Each screen must specify its primary action, secondary actions, visible status, validation feedback, empty state, loading or pending state, success confirmation, and recoverable failure state. 1. Calendar: week view, channel filter, queue slots, drafts, scheduled posts, published markers, failures, and drag-to-reschedule feedback. 2. Composer: channel selector, text, link, image upload, per-channel preview, character count, schedule choice, and save-draft action. 3. Queue settings: timezone, recurring time slots per weekday, connected accounts, token health, and disconnect controls. 4. Publishing log: post, target channel, attempt time, status, provider message, retry count, and safe manual retry. CORE CAPABILITIES 1. draft, queued, published, and failed post states 2. a weekly calendar with drag-to-reschedule 3. text, link, and one-image attachments 4. per-channel previews and character warnings 5. retry controls and a readable publishing log DETAILED BEHAVIOR AND BUSINESS RULES Treat these as server-enforced product requirements, not interface suggestions: 1. Every post targets one connection in v1; validate text length, media type, dimensions, and publish time before it enters the queue. 2. Assign a stable idempotency key to each scheduled publication and never publish twice after worker retries or uncertain provider responses. 3. Moving or deleting a post must atomically release its old slot; display all scheduling in the owner’s configured timezone. 4. Refresh provider credentials server-side, encrypt stored secrets, and pause the queue with a visible reconnect state when authorization fails. DATA MODEL AND LIFECYCLE Design a small relational schema centered on Channel, Post, MediaAsset, PublishAttempt. Before implementing it, document: 1. Each table’s purpose, primary key, ownership or tenant boundary, timestamps, status fields, and important attributes. 2. Foreign keys, uniqueness constraints, check constraints, indexes needed by the named screens, and transaction boundaries for multi-record changes. 3. The allowed lifecycle or state transitions, who may trigger each transition, which transitions are terminal or reversible, and what audit history must remain immutable. 4. Archive, retention, and deletion behavior, including what happens to dependent records and external files. 5. Idempotency strategy for submissions, jobs, imports, notifications, webhooks, or retries where applicable. Use migrations rather than ad-hoc schema creation. Store time instants consistently and retain named timezone context whenever local schedules or dates matter. Never rely on a counter, disabled button, or client-side check to preserve a business invariant. USERS, AUTHENTICATION, AND PERMISSIONS Implement only the roles required by the stated audience. Make the ownership and visibility model explicit before coding. Enforce authorization in every server-side query and mutation, including search, exports, attachments, live updates, and guessed URLs—not merely by hiding controls. Use secure session defaults, protect state-changing requests, and provide an understandable signed-out, expired-session, and forbidden state. Seed distinct users when multiple roles are required so permissions can be demonstrated and tested. INTERACTION AND VISUAL DIRECTION The product should feel fast, calm, focused, and credible rather than like a generic admin template. Use a clear visual hierarchy, restrained color, readable typography, generous hit targets, and consistent placement for primary actions. Start with server-rendered HTML and progressively enhance only the interactions that benefit from it. The core workflow must remain understandable if enhancement fails. Render with React Server Components by default. Use Server Actions for authenticated form mutations and add Client Components only for interactions that genuinely require browser state, browser APIs, drag-and-drop, or live updates. The core workflow must remain understandable before client-side JavaScript finishes loading. Design mobile layouts intentionally instead of simply stacking desktop panels. Support keyboard navigation, visible focus, semantic landmarks, explicit labels, useful page titles, reduced-motion preferences, and screen-reader announcements for asynchronous results. Never use color alone to communicate state. Destructive actions require clear scope and confirmation; safe repeated actions should be idempotent. TECHNICAL DIRECTION Build this version with Next.js, the App Router, and TypeScript. Use Server Components by default, Server Actions for authenticated mutations, and Route Handlers for public APIs, OAuth callbacks, webhooks, feeds, uploads, and downloads. Use PostgreSQL through Drizzle ORM with versioned migrations and an isolated test database. Access S3-compatible object storage through a server-only adapter, and run slow or retryable work in a real job or workflow system instead of the request lifecycle. Keep domain rules in testable server-side modules instead of route handlers or UI components. Separate persistence, external providers, and background work behind small interfaces without building a framework. Prefer ordinary HTML forms and URLs for durable navigation; use optimistic interaction only when failure can be reconciled clearly. The product brief currently identifies Astro, Workers, R2 as capability context. Preserve any required native, browser-only, edge, storage, real-time, or background-processing capability through a narrow adapter appropriate to the selected framework. If the core workflow genuinely requires native or browser APIs, keep that runtime as the primary execution surface rather than simulating inaccessible capabilities or inventing an unnecessary web surface. Integrate with one social network API first and Cloudflare Cron Triggers. For every integration: - List required environment variables in an .env.example without real secrets. - Add a small adapter with timeouts, normalized errors, and a deterministic local fake or development path. - Verify inbound signatures and deduplicate provider events where supported. - Keep credentials server-side, encrypt long-lived provider tokens at rest, and redact secrets and sensitive payloads from logs. - Define retry, backoff, and idempotency behavior for any side effect that can be repeated. SECURITY AND PRIVACY Encrypt provider tokens and make publishing jobs idempotent. Validate, normalize, and length-limit all untrusted input on the server. Escape rendered content by default, sanitize any intentionally accepted markup, rate-limit public or abuse-prone actions, and use private object storage plus short-lived authorized URLs for sensitive files. Collect the minimum personal data necessary for the named workflow. Document retention and deletion behavior. Add specific protections for the riskier surfaces in this app, such as uploads, redirects, outbound requests, email delivery, OAuth, webhooks, CSV import or export, and real-time connections. ACCEPTANCE SCENARIOS Automate these app-specific scenarios at the most appropriate level: 1. A queued post publishes once at the intended instant and moves from calendar queue to published history with the provider URL. 2. An expired token marks the attempt as authorization failed, leaves the post recoverable, and guides the owner to reconnect before retrying. 3. Dragging one post onto an occupied queue slot offers swap or choose-another-time behavior instead of silently overwriting either post. TESTING Add focused unit tests for state transitions, authorization predicates, normalization, date or money calculations, and other risky domain rules. Add integration tests for persistence constraints and each external adapter’s success, timeout, retry, and rejection paths. Add at least one browser-level test for every end-to-end journey above, including one small-screen viewport. Tests must use isolated data and run through a documented single command. OPERATIONS AND FAILURE RECOVERY Add structured server logs with request, job, or event correlation IDs but no secrets or unnecessarily sensitive data. Make failures actionable in both the interface and logs. Background work must expose pending, succeeded, failed, and retrying states where relevant; do not silently swallow errors. Include safe database migration and rollback guidance, seed data, backup and restore notes, external-data cleanup behavior, and a basic health or diagnostic path appropriate to the stack. DELIVERABLES Ship the working application, migrations, representative seed data, tests, .env.example, and a concise README. The README must cover prerequisites, local setup, environment variables, migrations, seed and test commands, deployment, integration setup, backup and restore, security decisions, and known limitations. Seed data should exercise the happy path plus at least one empty, failed, overdue, expired, archived, or permission-restricted state relevant to the product. DEFINITION OF DONE The app is complete when a fresh developer can follow the README, create and migrate the database, run the app, sign in as each relevant role, complete every named journey using real persisted data, refresh without losing state, recover from common failures, and use the core interface on phone and desktop. All acceptance scenarios pass, permission boundaries are covered by tests, and no core screen is left as a placeholder. NON-GOALS Do not add AI writing, social listening, approval workflows, or every network in v1.
You are building a production-ready software product named “Queuebird”, a deliberately focused alternative to Buffer. Build a complete, usable vertical slice—not a landing page, static mockup, or disconnected collection of components. WORKING AGREEMENT Before writing implementation code, produce a short technical plan that names the routes or pages, server actions or endpoints, data tables, important state transitions, authorization boundaries, background jobs, and external adapters. Resolve contradictions in favor of the narrow audience and non-goals below. Prefer a small, legible architecture over speculative abstraction, but do not omit persistence, validation, error handling, or tests. PRODUCT BRIEF Primary user: one creator publishing to two social accounts. Primary outcome: draft posts, see the schedule, and publish automatically at the chosen time. Product principle: optimize the exact workflow below instead of copying the full breadth of Buffer. A first-time user should understand what to do from the interface itself, without a tour or documentation. END-TO-END USER JOURNEYS Implement all of these flows through the real interface and persistent data layer: 1. The owner connects a supported social account, defines recurring queue times, drafts a post, previews it, and adds it to the next open slot. 2. The owner drags a queued post to a different day, resolves a channel-specific length warning, and confirms the new publish time. 3. A scheduled job publishes the post, records the provider response, and either marks success or exposes a retryable failure with a useful reason. SCREENS AND INFORMATION ARCHITECTURE Build these as coherent responsive views. Each screen must specify its primary action, secondary actions, visible status, validation feedback, empty state, loading or pending state, success confirmation, and recoverable failure state. 1. Calendar: week view, channel filter, queue slots, drafts, scheduled posts, published markers, failures, and drag-to-reschedule feedback. 2. Composer: channel selector, text, link, image upload, per-channel preview, character count, schedule choice, and save-draft action. 3. Queue settings: timezone, recurring time slots per weekday, connected accounts, token health, and disconnect controls. 4. Publishing log: post, target channel, attempt time, status, provider message, retry count, and safe manual retry. CORE CAPABILITIES 1. draft, queued, published, and failed post states 2. a weekly calendar with drag-to-reschedule 3. text, link, and one-image attachments 4. per-channel previews and character warnings 5. retry controls and a readable publishing log DETAILED BEHAVIOR AND BUSINESS RULES Treat these as server-enforced product requirements, not interface suggestions: 1. Every post targets one connection in v1; validate text length, media type, dimensions, and publish time before it enters the queue. 2. Assign a stable idempotency key to each scheduled publication and never publish twice after worker retries or uncertain provider responses. 3. Moving or deleting a post must atomically release its old slot; display all scheduling in the owner’s configured timezone. 4. Refresh provider credentials server-side, encrypt stored secrets, and pause the queue with a visible reconnect state when authorization fails. DATA MODEL AND LIFECYCLE Design a small relational schema centered on Channel, Post, MediaAsset, PublishAttempt. Before implementing it, document: 1. Each table’s purpose, primary key, ownership or tenant boundary, timestamps, status fields, and important attributes. 2. Foreign keys, uniqueness constraints, check constraints, indexes needed by the named screens, and transaction boundaries for multi-record changes. 3. The allowed lifecycle or state transitions, who may trigger each transition, which transitions are terminal or reversible, and what audit history must remain immutable. 4. Archive, retention, and deletion behavior, including what happens to dependent records and external files. 5. Idempotency strategy for submissions, jobs, imports, notifications, webhooks, or retries where applicable. Use migrations rather than ad-hoc schema creation. Store time instants consistently and retain named timezone context whenever local schedules or dates matter. Never rely on a counter, disabled button, or client-side check to preserve a business invariant. USERS, AUTHENTICATION, AND PERMISSIONS Implement only the roles required by the stated audience. Make the ownership and visibility model explicit before coding. Enforce authorization in every server-side query and mutation, including search, exports, attachments, live updates, and guessed URLs—not merely by hiding controls. Use secure session defaults, protect state-changing requests, and provide an understandable signed-out, expired-session, and forbidden state. Seed distinct users when multiple roles are required so permissions can be demonstrated and tested. INTERACTION AND VISUAL DIRECTION The product should feel fast, calm, focused, and credible rather than like a generic admin template. Use a clear visual hierarchy, restrained color, readable typography, generous hit targets, and consistent placement for primary actions. Start with server-rendered HTML and progressively enhance only the interactions that benefit from it. The core workflow must remain understandable if enhancement fails. Start with server-rendered Blade views and ordinary forms. Use Livewire for focused server-driven interactions and Alpine.js only for small local interface state. The core workflow must remain understandable without relying on a client-side application shell. Design mobile layouts intentionally instead of simply stacking desktop panels. Support keyboard navigation, visible focus, semantic landmarks, explicit labels, useful page titles, reduced-motion preferences, and screen-reader announcements for asynchronous results. Never use color alone to communicate state. Destructive actions require clear scope and confirmation; safe repeated actions should be idempotent. TECHNICAL DIRECTION Build this version with Laravel, PHP, Blade, Livewire, and Alpine.js. Use controllers and Blade forms for durable navigation, Livewire for focused interactions, Form Requests for validation, Policies and Gates for authorization, and small application actions or services for domain transitions. Use Eloquent with migrations, database constraints, and transactions; Laravel Storage for private S3-compatible files; queued Jobs for retryable work; the Scheduler for recurring work; and Notifications or Mail for email. Keep domain rules in testable server-side modules instead of route handlers or UI components. Separate persistence, external providers, and background work behind small interfaces without building a framework. Prefer ordinary HTML forms and URLs for durable navigation; use optimistic interaction only when failure can be reconciled clearly. The product brief currently identifies Astro, Workers, R2 as capability context. Preserve any required native, browser-only, edge, storage, real-time, or background-processing capability through a narrow adapter appropriate to the selected framework. If the core workflow genuinely requires native or browser APIs, keep that runtime as the primary execution surface rather than simulating inaccessible capabilities or inventing an unnecessary web surface. Integrate with one social network API first and Cloudflare Cron Triggers. For every integration: - List required environment variables in an .env.example without real secrets. - Add a small adapter with timeouts, normalized errors, and a deterministic local fake or development path. - Verify inbound signatures and deduplicate provider events where supported. - Keep credentials server-side, encrypt long-lived provider tokens at rest, and redact secrets and sensitive payloads from logs. - Define retry, backoff, and idempotency behavior for any side effect that can be repeated. SECURITY AND PRIVACY Encrypt provider tokens and make publishing jobs idempotent. Validate, normalize, and length-limit all untrusted input on the server. Escape rendered content by default, sanitize any intentionally accepted markup, rate-limit public or abuse-prone actions, and use private object storage plus short-lived authorized URLs for sensitive files. Collect the minimum personal data necessary for the named workflow. Document retention and deletion behavior. Add specific protections for the riskier surfaces in this app, such as uploads, redirects, outbound requests, email delivery, OAuth, webhooks, CSV import or export, and real-time connections. ACCEPTANCE SCENARIOS Automate these app-specific scenarios at the most appropriate level: 1. A queued post publishes once at the intended instant and moves from calendar queue to published history with the provider URL. 2. An expired token marks the attempt as authorization failed, leaves the post recoverable, and guides the owner to reconnect before retrying. 3. Dragging one post onto an occupied queue slot offers swap or choose-another-time behavior instead of silently overwriting either post. TESTING Add focused unit tests for state transitions, authorization predicates, normalization, date or money calculations, and other risky domain rules. Add integration tests for persistence constraints and each external adapter’s success, timeout, retry, and rejection paths. Add at least one browser-level test for every end-to-end journey above, including one small-screen viewport. Tests must use isolated data and run through a documented single command. OPERATIONS AND FAILURE RECOVERY Add structured server logs with request, job, or event correlation IDs but no secrets or unnecessarily sensitive data. Make failures actionable in both the interface and logs. Background work must expose pending, succeeded, failed, and retrying states where relevant; do not silently swallow errors. Include safe database migration and rollback guidance, seed data, backup and restore notes, external-data cleanup behavior, and a basic health or diagnostic path appropriate to the stack. DELIVERABLES Ship the working application, migrations, representative seed data, tests, .env.example, and a concise README. The README must cover prerequisites, local setup, environment variables, migrations, seed and test commands, deployment, integration setup, backup and restore, security decisions, and known limitations. Seed data should exercise the happy path plus at least one empty, failed, overdue, expired, archived, or permission-restricted state relevant to the product. DEFINITION OF DONE The app is complete when a fresh developer can follow the README, create and migrate the database, run the app, sign in as each relevant role, complete every named journey using real persisted data, refresh without losing state, recover from common failures, and use the core interface on phone and desktop. All acceptance scenarios pass, permission boundaries are covered by tests, and no core screen is left as a placeholder. NON-GOALS Do not add AI writing, social listening, approval workflows, or every network in v1.
You are building a production-ready software product named “Queuebird”, a deliberately focused alternative to Buffer. Build a complete, usable vertical slice—not a landing page, static mockup, or disconnected collection of components. WORKING AGREEMENT Before writing implementation code, produce a short technical plan that names the routes or pages, server actions or endpoints, data tables, important state transitions, authorization boundaries, background jobs, and external adapters. Resolve contradictions in favor of the narrow audience and non-goals below. Prefer a small, legible architecture over speculative abstraction, but do not omit persistence, validation, error handling, or tests. PRODUCT BRIEF Primary user: one creator publishing to two social accounts. Primary outcome: draft posts, see the schedule, and publish automatically at the chosen time. Product principle: optimize the exact workflow below instead of copying the full breadth of Buffer. A first-time user should understand what to do from the interface itself, without a tour or documentation. END-TO-END USER JOURNEYS Implement all of these flows through the real interface and persistent data layer: 1. The owner connects a supported social account, defines recurring queue times, drafts a post, previews it, and adds it to the next open slot. 2. The owner drags a queued post to a different day, resolves a channel-specific length warning, and confirms the new publish time. 3. A scheduled job publishes the post, records the provider response, and either marks success or exposes a retryable failure with a useful reason. SCREENS AND INFORMATION ARCHITECTURE Build these as coherent responsive views. Each screen must specify its primary action, secondary actions, visible status, validation feedback, empty state, loading or pending state, success confirmation, and recoverable failure state. 1. Calendar: week view, channel filter, queue slots, drafts, scheduled posts, published markers, failures, and drag-to-reschedule feedback. 2. Composer: channel selector, text, link, image upload, per-channel preview, character count, schedule choice, and save-draft action. 3. Queue settings: timezone, recurring time slots per weekday, connected accounts, token health, and disconnect controls. 4. Publishing log: post, target channel, attempt time, status, provider message, retry count, and safe manual retry. CORE CAPABILITIES 1. draft, queued, published, and failed post states 2. a weekly calendar with drag-to-reschedule 3. text, link, and one-image attachments 4. per-channel previews and character warnings 5. retry controls and a readable publishing log DETAILED BEHAVIOR AND BUSINESS RULES Treat these as server-enforced product requirements, not interface suggestions: 1. Every post targets one connection in v1; validate text length, media type, dimensions, and publish time before it enters the queue. 2. Assign a stable idempotency key to each scheduled publication and never publish twice after worker retries or uncertain provider responses. 3. Moving or deleting a post must atomically release its old slot; display all scheduling in the owner’s configured timezone. 4. Refresh provider credentials server-side, encrypt stored secrets, and pause the queue with a visible reconnect state when authorization fails. DATA MODEL AND LIFECYCLE Design a small relational schema centered on Channel, Post, MediaAsset, PublishAttempt. Before implementing it, document: 1. Each table’s purpose, primary key, ownership or tenant boundary, timestamps, status fields, and important attributes. 2. Foreign keys, uniqueness constraints, check constraints, indexes needed by the named screens, and transaction boundaries for multi-record changes. 3. The allowed lifecycle or state transitions, who may trigger each transition, which transitions are terminal or reversible, and what audit history must remain immutable. 4. Archive, retention, and deletion behavior, including what happens to dependent records and external files. 5. Idempotency strategy for submissions, jobs, imports, notifications, webhooks, or retries where applicable. Use migrations rather than ad-hoc schema creation. Store time instants consistently and retain named timezone context whenever local schedules or dates matter. Never rely on a counter, disabled button, or client-side check to preserve a business invariant. USERS, AUTHENTICATION, AND PERMISSIONS Implement only the roles required by the stated audience. Make the ownership and visibility model explicit before coding. Enforce authorization in every server-side query and mutation, including search, exports, attachments, live updates, and guessed URLs—not merely by hiding controls. Use secure session defaults, protect state-changing requests, and provide an understandable signed-out, expired-session, and forbidden state. Seed distinct users when multiple roles are required so permissions can be demonstrated and tested. INTERACTION AND VISUAL DIRECTION The product should feel fast, calm, focused, and credible rather than like a generic admin template. Use a clear visual hierarchy, restrained color, readable typography, generous hit targets, and consistent placement for primary actions. Start with server-rendered HTML and progressively enhance only the interactions that benefit from it. The core workflow must remain understandable if enhancement fails. Start with server-rendered Rails views and ordinary forms. Use Turbo for navigation, submissions, and server-driven updates, then Stimulus only for small browser-side behavior. Do not turn the product into a client-side SPA, and keep the core workflow usable when enhancement fails. Design mobile layouts intentionally instead of simply stacking desktop panels. Support keyboard navigation, visible focus, semantic landmarks, explicit labels, useful page titles, reduced-motion preferences, and screen-reader announcements for asynchronous results. Never use color alone to communicate state. Destructive actions require clear scope and confirmation; safe repeated actions should be idempotent. TECHNICAL DIRECTION Build this version with Ruby on Rails and Hotwire: Turbo for navigation, form submissions, and server-driven updates, and Stimulus for small browser-side behavior. Use RESTful controllers with strong parameters and explicit authorization, with domain transitions in testable models or small application services. Use Active Record migrations plus database-level constraints and transactions; Active Storage with an S3-compatible service for private files; Active Job with a durable queue backend for retryable work; Action Mailer for email; and Action Cable only when live updates are required. Keep domain rules in testable server-side modules instead of route handlers or UI components. Separate persistence, external providers, and background work behind small interfaces without building a framework. Prefer ordinary HTML forms and URLs for durable navigation; use optimistic interaction only when failure can be reconciled clearly. The product brief currently identifies Astro, Workers, R2 as capability context. Preserve any required native, browser-only, edge, storage, real-time, or background-processing capability through a narrow adapter appropriate to the selected framework. If the core workflow genuinely requires native or browser APIs, keep that runtime as the primary execution surface rather than simulating inaccessible capabilities or inventing an unnecessary web surface. Integrate with one social network API first and Cloudflare Cron Triggers. For every integration: - List required environment variables in an .env.example without real secrets. - Add a small adapter with timeouts, normalized errors, and a deterministic local fake or development path. - Verify inbound signatures and deduplicate provider events where supported. - Keep credentials server-side, encrypt long-lived provider tokens at rest, and redact secrets and sensitive payloads from logs. - Define retry, backoff, and idempotency behavior for any side effect that can be repeated. SECURITY AND PRIVACY Encrypt provider tokens and make publishing jobs idempotent. Validate, normalize, and length-limit all untrusted input on the server. Escape rendered content by default, sanitize any intentionally accepted markup, rate-limit public or abuse-prone actions, and use private object storage plus short-lived authorized URLs for sensitive files. Collect the minimum personal data necessary for the named workflow. Document retention and deletion behavior. Add specific protections for the riskier surfaces in this app, such as uploads, redirects, outbound requests, email delivery, OAuth, webhooks, CSV import or export, and real-time connections. ACCEPTANCE SCENARIOS Automate these app-specific scenarios at the most appropriate level: 1. A queued post publishes once at the intended instant and moves from calendar queue to published history with the provider URL. 2. An expired token marks the attempt as authorization failed, leaves the post recoverable, and guides the owner to reconnect before retrying. 3. Dragging one post onto an occupied queue slot offers swap or choose-another-time behavior instead of silently overwriting either post. TESTING Add focused unit tests for state transitions, authorization predicates, normalization, date or money calculations, and other risky domain rules. Add integration tests for persistence constraints and each external adapter’s success, timeout, retry, and rejection paths. Add at least one browser-level test for every end-to-end journey above, including one small-screen viewport. Tests must use isolated data and run through a documented single command. OPERATIONS AND FAILURE RECOVERY Add structured server logs with request, job, or event correlation IDs but no secrets or unnecessarily sensitive data. Make failures actionable in both the interface and logs. Background work must expose pending, succeeded, failed, and retrying states where relevant; do not silently swallow errors. Include safe database migration and rollback guidance, seed data, backup and restore notes, external-data cleanup behavior, and a basic health or diagnostic path appropriate to the stack. DELIVERABLES Ship the working application, migrations, representative seed data, tests, .env.example, and a concise README. The README must cover prerequisites, local setup, environment variables, migrations, seed and test commands, deployment, integration setup, backup and restore, security decisions, and known limitations. Seed data should exercise the happy path plus at least one empty, failed, overdue, expired, archived, or permission-restricted state relevant to the product. DEFINITION OF DONE The app is complete when a fresh developer can follow the README, create and migrate the database, run the app, sign in as each relevant role, complete every named journey using real persisted data, refresh without losing state, recover from common failures, and use the core interface on phone and desktop. All acceptance scenarios pass, permission boundaries are covered by tests, and no core screen is left as a placeholder. NON-GOALS Do not add AI writing, social listening, approval workflows, or every network in v1.
Build just one piece
Not ready to replace all of Buffer? Fine. These are the peculiar sub-problems hiding inside it — the parts that are actually interesting to build. Each one is a standalone prompt, scoped to an evening, no strings attached to the full build.
Never post twice, even when the API times outIdempotency keys for a world where a timeout doesn’t mean failure.
Build the publish job for a social-post scheduler that never double-posts, even when the network gaslights you. Each scheduled publication gets a stable idempotency key at queue time. The worker claims a due post atomically (two workers must never grab the same one), records an attempt row before calling the provider, then makes the API call. The hard case is the uncertain outcome: a timeout after the request was sent might mean the post is live. Never blind-retry. Mark the attempt as unknown, and on the next run interrogate the provider — search recent posts for your idempotency marker, or use the provider's native idempotency support if it exists — before deciding whether to re-send. Success stores the provider's post id and URL; definite failure stores the reason and schedules a bounded retry with backoff. Crash-safety matters: a worker dying mid-publish must leave state from which the next run does the right thing. Done when: forced worker restarts and injected timeouts produce exactly one live post per publication, every attempt is visible in a log with its outcome, and unknown outcomes resolve without human archaeology.
The queue that always knows its next open slotRecurring slots, atomic releases, and drags that never eat a post.
Build the queue-slot scheduler for a social posting tool: recurring posting times that drafts flow into automatically. The owner defines slots per weekday in their timezone, say Mon, Wed, Fri at 9:00 and 16:00. An add-to-queue action assigns a post to the next unoccupied slot; the calendar shows weeks of concrete slot instances materialized from the recurring rules. Compute instances on the fly instead of pre-generating rows forever. The bookkeeping that bites: moving a post to a custom time must atomically release its old slot so the next queued post can claim it, and deleting does the same. Dragging a post onto an occupied slot offers a swap or a pick-another-time choice — never a silent overwrite of either post. Changing the slot schedule reflows only unpublished queued posts, never history. Display everything in the owner's configured timezone, including across DST shifts: a 9:00 slot stays 9:00 local. Done when: queueing five drafts fills the next five slots in order, any move or delete frees its slot for the next add-to-queue, and no drag can ever vaporize a post.
When the token dies, pause the queue, not the postsExpired tokens pause the channel, keep the posts, and beg for reconnection.
Build credential-failure handling for a scheduler that posts on your behalf while you sleep. Provider tokens expire, get revoked, and rot silently. Refresh them server-side before each publish window; store secrets encrypted at rest and never ship them to the browser. When a refresh or publish returns an authorization error, do not retry your way into a ban: mark the channel unhealthy, pause its queue, and convert the failed attempt into a recoverable state on the post — authorization failed, not lost. The dashboard needs an unmissable reconnect banner naming which channel broke and when. The re-auth flow, on success, revalidates the token with a cheap read call, marks the channel healthy, and offers to retry paused posts in their original order, recomputing times for any whose slot has already passed. Distinguish auth failures from rate limits and outages. Only auth failures pause the queue. Done when: an expired token pauses exactly its own channel with zero lost posts, reconnecting resumes the queue with sensible rescheduling, and no token ever appears in a log, error message, or client payload.
Character counting is never just string lengthURLs count as 23, emoji count double, and code units count as lies.
Build per-channel character counting for a post composer, and accept that length is not string length. Each channel has its own rules. Model the classic ones: every URL counts as a fixed 23 characters regardless of its real length (detect URLs roughly the way the platform does — schemes plus bare domains with known TLDs); astral-plane characters like emoji may count as 2; and count grapheme clusters, not UTF-16 code units, because a family emoji is one visible thing built from many code points. Show a live counter that turns amber near the limit and red past it, with the overflowing region highlighted inside the text itself. When one post targets a channel where it fits and another where it does not, warn per channel instead of blocking globally. Implement the counter as a pure function per channel — text in, weighted length and overflow ranges out — with a test table of real edge cases. Done when: a post with two long URLs and a flag emoji counts correctly under each channel's rules, the overflow highlight matches the counted overflow exactly, and the function passes your edge-case table.
Frequently asked questions
How long does it take to build your own Buffer?
A basic version — post queue, one network, scheduled publish — takes about 8 hours. Roughly 3 days gets you a solid v1 with calendar drag-reschedule, previews, retries, second network. Matching everything Buffer really does (every network api, approvals, analytics, ai writing) is closer to 1 month+, which is exactly why you should scope down instead.
How much does Buffer cost if I keep subscribing?
Buffer runs $18–$36 per month on public paid plans, which is $216–$432 per year. A focused self-built replacement costs your build time plus close-to-zero hosting.
What stack should I use to build a Buffer alternative?
The build prompt on this page ships in four flavors: the AHA stack (Astro, HTMX, Alpine.js), Next.js, Laravel, and Ruby on Rails. The capability context for this product is Astro, Workers, R2. Pick the stack you already know — the scope matters more than the framework.
What features does a minimal Buffer replacement need?
A useful v1 needs: draft, queued, published, and failed post states; a weekly calendar with drag-to-reschedule; text, link, and one-image attachments; per-channel previews and character warnings; retry controls and a readable publishing log. Everything else is scope creep until you personally miss it.
What should I deliberately not build?
Do not add AI writing, social listening, approval workflows, or every network in v1.
Does this build also replace Typefully, Hypefury and Later?
Yes. Buffer, Typefully, Hypefury and Later all solve the same core job — draft posts, see the schedule, and publish automatically at the chosen time. The scoped v1 on this page covers what most people use any of them for, so one focused build replaces whichever you currently pay for.