Apps & prototypes Templates to fill in and copy
Debugging, tests, code explanations and rules files for coding agents. Each entry is a prompt: you paste it into an AI tool of your choice, which then creates the result.
Landing page with HTML and CSS New
Prompt for a simple, fast landing page in one file, mobile first, accessible and without heavy frameworks.
Design a data model New
Prompt for a first data model for your app: tables, fields, relations and open questions.
Build a regular expression from examples New
Prompt that builds a readable regular expression from matching and non-matching examples, explains it and checks it against every example.
Plan a rollout behind a feature flag New
Prompt for a staged rollout behind a feature flag with stop signals, a way back and a date for removal.
Plan caching for a slow endpoint New
Prompt that plans caching for a slow endpoint: what may be cached, where the cache sits and how stale entries are removed.
Make a job or webhook safe to retry New
Prompt that protects a job or webhook against double execution with an idempotency key, clear states and retry rules.
Implement a secure file upload New
Prompt that secures a file upload with checked file types, limits, own file names and controlled access.
Choose pagination for an API list New
Prompt that sets cursor or page numbers, stable sorting, page size and response format for an API list.
Receive and process webhooks safely New
Prompt that plans a webhook receiver with signature check, a quick response and protection against duplicate events.
Prepare app texts for translation New
Prompt that makes an application translatable: language files, placeholders, plurals and formats per language.
Build a secure password reset New
Prompt that plans password resets with short-lived links, neutral answers and ended sessions.
Plan search for an app New
Prompt that plans a search feature with weighting, typo tolerance, permission checks and help for zero results.
Write an API reference people can use right away New
Prompt that turns code and examples into a per-endpoint reference with error codes and working calls.
Handle money amounts correctly in code New
Prompt that reviews how money amounts are stored and rounded and sets rules with test cases.
Find the commit that introduced a bug with git bisect New
Prompt that plans a git bisect session with a reliable check, a good starting point and a clear reading of the result.
Write form error messages people understand New
Template that rewrites form error messages with problem, fix and placement instead of codes.
Answer code review comments clearly New
Prompt that sorts review comments, decides now, later or keep for each one and drafts calm replies.
Fix broken umlauts and special characters New
Prompt that finds the step where umlauts and special characters break and plans a fix and a repair.
Draft an API description from existing routes New
Template that turns existing routes and examples into an OpenAPI draft with a list of open points.
Find where a setting really comes from New
Prompt that traces a setting through all configuration layers and shows which value wins and why.
Choose the next version number for a release New
Prompt that sorts changes since the last release, proposes the next version number and drafts upgrade notes.
Compare and sort text with accents correctly New
Prompt that explains why text with accents does not match or sorts wrongly and sets clear rules.
Track down and prevent database deadlocks New
Prompt that reads a deadlock report, finds the conflicting lock order and proposes lasting fixes.
Choose the right ID type for records New
Prompt that compares ID types for a table or API and recommends one with reasons.
Fix garbled characters in imported files New
Prompt that finds where text gets garbled on its way from file to database and sets one encoding rule.
Clean up log levels and log messages New
Prompt that sorts log messages by purpose, fixes wrong levels and rewrites vague messages into searchable lines.
Shut down services gracefully New
Prompt that defines a shutdown sequence so deployments do not abort requests or lose jobs.
Keep dependencies reproducible with a lockfile New
Prompt that finds why builds pull different package versions and sets rules for the lockfile and updates.
Guard scheduled jobs against overlapping runs New
Prompt that protects scheduled jobs from double execution with a lock, a time limit and a rule for missed runs.
Normalise Unicode input before comparing New
Prompt that makes text input consistent before storing and comparing, so values that look the same are the same.
Size a database connection pool New
Prompt that adds up database connections across all instances and sets pool size and time limits.
Guard caches against stampede New
Prompt that protects caches from concurrent recomputation with coalescing and staggered expiry.
Plan backward-compatible schema changes New
Prompt that plans schema and API changes in compatible phases without breaking old clients.
Design reliable event publishing New
Prompt that stores business data and event intents in one step and makes delivery retryable.
Find N+1 queries New
Prompt that finds list-plus-per-item fetches and proposes batched queries.
Design circuit breakers for dependencies New
Prompt that plans open, half-open and fallback for a breaker in front of dependencies.
Clean up stale feature flags New
Prompt that finds stable or dead feature flags and sets a safe removal order.
Design fencing tokens for locks New
Prompt that designs fencing tokens for distributed locks and prevents split-brain after expiry.
Diagnose consumer lag and backpressure New
Prompt that separates consumer lag from missing backpressure and sets limits plus alerts.
Plan load shedding and admission New
Prompt that plans admission and load shedding so core paths answer under overload.
Plan retry-after and backoff New
Prompt that plans Retry-After, exponential backoff with jitter and a hard retry budget.
Plan shadow traffic before cutover New
Prompt that plans shadow traffic before cutover without double side effects.
Propagate request IDs across services New
Prompt that propagates one request ID across services, logs and queues.
Plan idempotency keys for writes New
Prompt that plans stable idempotency keys so write retries do not double side effects.
Quarantine poison messages in queues New
Prompt that quarantines repeatedly failing queue messages and defines safe replay.
Plan expand-contract schema migration New
Prompt that plans expand-contract schema migration with dual-write and a safe contract phase.
Rollback plan before a release New
Prompt for a rollback plan before a release: measurable triggers, steps, handling of data changes and checks afterwards.
Review a Dockerfile for size, security and build time New
Prompt that reviews a Dockerfile for image size, build cache, root privileges and secrets and returns an improved version with reasons.
Plan rate limits for an API New
Prompt that plans request limits for an API, with a method, the response when a limit is exceeded and how to announce it.
Plan a throttled data backfill New
Prompt that plans a data backfill in small, resumable batches with clear brakes.
Defuse hot keys in database and cache New
Prompt that finds hot keys in database and cache and spreads load without blindly giving up consistency.
Plan soft delete cleanly New
Prompt that plans soft delete with hiding, restore and final deletion.
You may use our prompts freely, including at work. Please do not republish them as your own collection. We give no warranty for AI results; check them yourself. Terms of use