trovex vs repomix / files-to-prompt
Packing the whole repo into a prompt is great for one-shot questions. Here's where it gets expensive — and what trovex does instead.
repomix and files-to-prompt pack your repo (or a filtered subset) into one big prompt for an LLM. That's the right tool when you want to hand a model a whole codebase at once. For repeated, targeted lookups it floods the context window on every prompt — the opposite of token-efficient. trovex retrieves: it returns the one current doc that answers a query, down to the section, for about 60% fewer tokens per lookup. Packing is for one-shot global context; trovex is for the everyday "which doc answers this?" loop.
What do repomix and files-to-prompt do?
They concatenate your files into a single, prompt-ready blob. repomix packs a repository into one structured file (XML, markdown, or plain text) with a token count, optimized for pasting into an LLM. files-to-prompt does the same for a set of files or directories. Both are excellent at one job: getting a lot of code in front of a model in one shot — a whole-repo audit, onboarding an LLM to an unfamiliar project, or a question that truly needs the global picture.
Where does packing get expensive?
When the same context is sent again and again. Packing has three costs that compound:
- You pay for everything, every time. A packed repo includes all the files on every prompt, whether or not the question needed them — across every session and every agent.
- Bigger context isn't better context. Flooding the window with the whole repo dilutes the relevant part and can make answers worse, not just costlier.
- It's a snapshot, not a source of truth. A pack is a point-in-time dump with no freshness signal and no place for an agent to write back what it learned.
How is trovex different?
trovex is retrieval, not packing. It indexes your markdown once, then answers a query with the single canonical doc that addresses it — a path:line pointer and the section that matters, with a freshness marker so stale and duplicate copies are skipped. Instead of re-sending the repo on every question, an agent gets a short, current answer for short-answer tokens. And what one agent learns is written back through one shared point, so the next agent reads it instead of re-deriving it.
| Capability | repomix / files-to-prompt | trovex |
|---|---|---|
| Core model | Pack the repo into one prompt | Retrieve the one doc that answers |
| Best for | ✓ one-shot whole-repo questions | ✓ repeated, targeted lookups |
| Tokens on a repeated lookup | — whole pack, every time | ~60% fewer — one section served |
| Routes a query to the right doc | — sends everything | ✓ one canonical answer |
| Freshness signal | — static snapshot | ✓ canonical / stale / duplicate |
| Write-back / shared memory | — | ✓ agents record once, all read it |
| Runs locally, no keys | ✓ | ✓ SQLite + ONNX, no cloud |
When should you reach for repomix instead?
When the task genuinely needs the whole codebase in one prompt: a one-time audit, sharing a repo with a model that's never seen it, or a question whose answer depends on global structure. For that, packing is simpler and exactly right. trovex is for the other 90% of the day — the steady stream of specific questions where re-sending the repo each time is what burns the tokens. Many people use both: repomix to bootstrap, trovex for the ongoing lookups.
FAQ
What is the difference between trovex and repomix?
repomix packs your whole repository into one big prompt for an LLM. trovex does the opposite: it indexes the repo and returns only the one current doc that answers a given query. repomix is built for a one-shot question about an entire codebase; trovex is built for repeated lookups across sessions, where loading everything each time is expensive.
When should I use repomix or files-to-prompt instead of trovex?
Use repomix or files-to-prompt when you want to hand an LLM a whole codebase at once — a one-time audit, onboarding a model to an unfamiliar repo, or a question that genuinely needs global context. Use trovex when agents ask many targeted questions over time and you don't want to pay to re-send the whole repo on every one.
Why is packing the whole repo into a prompt expensive?
Because the cost is paid every time. A packed repo sends all the files on every prompt, whether or not the question needed them, and a bigger context window is not a more current or more correct one. trovex sends the one section that answers, so a short answer costs short-answer tokens — about 60% fewer per lookup.
Stop re-sending the repo on every question.
Index once. trovex serves the one current answer per query.
trovex is in private beta — request access and we'll bring you in.
Open source. No cloud, no API keys. Your docs never leave your machine.