# Ctx

> Instant recall for coding agents.

- **Website:** https://github.com/ctxrs/ctx/blob/main/README.md
- **Pricing:** open source
- **Categories:** Developer Tools, AI Agents
- **Tags:** developer-tools, ai-agents, design
- **Platforms:** macOS, Windows, Linux, CLI
- **Last verified:** 2026-09-10
- **Canonical page:** https://linkrena.com/tools/ctx

## About

Coding agents have git history, but their own session transcripts and tool call records remain sequestered away in verbose log files. Those log files are a treasure trove of useful data, but they aren't accessible in a legible format for agents.

That means less repeated agent work, lower token spend, and better task outcomes because each new session can use the history already on your machine.

This is different from “agent memory,” which usually compacts what happened into facts or summaries that can become stale. ctx gives agents instant recall of the real record without a lossy memory step.

By structuring agent history into sessions, events, metadata, and indexed fields, then returning ranked cited matches, agents can access meaningful history with far fewer tokens than raw search. Results vary by query and corpus, but raw search is often so token-heavy that it can be effectively the same as not having usable history.

Agents use ctx blame to recover context that no longer exists anywhere near the current session. Starting from a file, line range, commit, or PR, they can find the relevant historical agent sessions and recover the decisions, constraints, failed approaches, and assumptions recorded there.

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