Practice English speaking with AI in real scenarios, then get a review report
Problem
Many learners memorize vocabulary and textbooks yet freeze when they actually need to speak. Most speaking apps either use fixed scripts or give no feedback after practice, leaving users unsure what went wrong and how to improve. Someone built a speaking coach for their wife and realized that the review after practice is the real key, but most tools stop at conversation.
Solution
An AI speaking coach where users pick a real-life scenario (ordering coffee, hotel check-in, airport immigration, job interview, casual chat) and talk naturally with AI. The AI follow-ups are not scripted and users can interrupt or rephrase anytime. After each session it generates a review report with full transcript, flagged issues, better phrasings, and recurring grammar or word-choice problems.
Turn Cloudflare Workers free tier into temporary file sharing with live quota tracking
Problem
People often want to share files quickly with colleagues or friends without signing up for cloud storage, uploading to public servers or worrying about files lingering forever. Some have noticed Cloudflare Workers offers a generous free tier and want an ephemeral QQ-style drop, but no convenient tool exists and building one manually is too much hassle.
Solution
A temporary file-sharing site built entirely on Cloudflare Workers and R2 free tiers. Users drag and drop files to generate short-lived share links that auto-delete on expiry or first download. A dashboard shows real-time free quota usage and remaining uploads. No server maintenance required.
Select code in JetBrains IDEs and send precise references to Codex App in one click
Problem
Developers using Codex App alongside their IDE must manually copy file paths, count line numbers and switch to the Codex window to paste context. After selecting multiple lines the reference format is error-prone, breaking flow and making the whole loop tedious.
Solution
A JetBrains IDE plugin that adds a 'Send to Codex App' action in the editor toolbar and context menu. It opens the current project in Codex App with one click, and when code is selected it automatically attaches the file path and exact line range. The reference is only inserted into the input box, not auto-sent, so users can add more context.
Many developers call LLMs through cheap relays or shared subscriptions without knowing whether requests are routed to a cheaper model or throttled during peak load. Some users discovered through fingerprint tests that the client was not running the advertised model, while others complain that subscription accounts get noticeably slower and dumber at certain hours. This uncertainty directly affects production quality, yet there is no easy day-to-day verification tool.
Solution
A lightweight model fingerprint and quality monitoring service that periodically probes your configured API endpoints with a set of standardized prompts, identifies the actual model version through response characteristics, self-reporting and behavioral fingerprints, and tracks latency, failure rate and output quality trends. When a model swap or quality drop is detected, it alerts via email or webhook.
Import raw tables and auto-generate business reports with saved logic
Problem
Business teams spend hours manually importing, copying, running VLOOKUPs, pivoting, and formatting data in Excel to produce reports. They want a solution that takes raw data and automatically outputs reports based on predefined logic, while still allowing easy customization and updates. Existing tools are either too heavy or not flexible enough for fast iteration.
Solution
An online tool where users upload CSV/Excel files, define calculation logic through a visual interface (formulas or simple flows), and generate reports saved as reusable templates. When the template is updated, new data imports automatically apply the latest logic.
Turn vague tasks into verifiable steps that save tokens and improve reliability
Problem
Developers are frustrated that long AI agent tasks burn huge amounts of tokens because prompts are vague and lack acceptance criteria. A V2EX post summarizes a 4-step method to cut token burn, centered on 'write acceptance criteria first' and 'split into checkable steps'; another thread suggests negative skill files (NEGATIVESKILLS) to stop agents from repeating mistakes.
Solution
An editor plugin or web tool where users enter a vague task goal, and it automatically generates a structured acceptance checklist and decomposition steps, plus common anti-pattern reminders, exportable as an agent-readable SOP file.
Track when and how your brand appears in AI assistant answers
Problem
Small business owners are starting to hear customers say 'I asked ChatGPT who does this and your name came up,' but nobody knows how common it is or how to track and improve it. Traditional web analytics can't see AI assistant traffic, and Google Search Console has no data for it.
Solution
A lightweight SaaS that periodically asks mainstream AI assistants the industry questions your customers use, logs how often your brand is mentioned and in what context, and generates shareable visibility reports.
Securely store and auto-switch logins for multiple CLI tools
Problem
Developers constantly switch between CLIs like Vercel, Codex, and GitHub, each with its own login flow, leaving tokens scattered and forcing frequent re-authentication. A post showcases a tool managing 10 CLI logins; another vents about an X account being locked out unexpectedly, highlighting anxiety around credential security and recoverability.
Solution
A cross-platform desktop app or CLI that encrypts each tool's tokens in the system keychain, supports one-click switching between accounts or environments, and auto-refreshes expiring tokens.
Monitor and stop AI agent budget blowouts from silent cache misses
Problem
AI coding agents silently re-bill entire conversations at cold-write prices when prompt cache breaks, with zero errors in logs. A V2EX post shares a 4-step method to reduce token burn on long agent tasks, showing deep user sensitivity to runaway spend; separate projects like Replay and Dep-radius are already tackling cache audits and dependency impact analysis, confirming a real engineering pain point.
Solution
A local-first CLI and dashboard that parses agent disk logs and API responses, detects prompt cache misses, and alerts when hit rates drop; it breaks down dollar cost per session and enforces hard budget caps for tools like Claude Code, Cursor, and Aider.