yc-duan/fastctx
Fast, context-efficient repository tools for AI agents (MCP) observed · 2026-08-28
Health v2 · maintenance only
80/100
- Activity 99
- Release rhythm 99
- Longevity 3
Flags: young
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: 2.5
- age_days: 47
- days_rel: 10
- days_push: 10
- n_releases_24m: 9
Adoption not part of the score
1203 stars · 50 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
FastCtx is a Rust-based local runtime that exposes fast, context-efficient repository tools (file reading, grep, glob, batch replacement, shell execution) to AI coding agents via MCP. It runs a persistent shared control center behind thin stdio proxies, reducing tool-call overhead and context consumption for agents like Codex.
Use cases
- give coding agents fast file search and read tools via mcp
- reduce context window usage when agents explore a repository
- replace ad-hoc shell commands with structured tool calls for ai agents
- connect repository tools to codex cli or chatgpt
- batch replace code across a repo from an ai agent
When to choose
- you use MCP-based coding agents and want fewer, cheaper tool calls
- you want stable structured inputs/outputs for repo operations instead of shell escaping
- you need reliable sessions with cancellation and reconnect behavior
When to avoid
- you need a general-purpose IDE or standalone code search tool without an AI agent
- you only use agents without MCP support and cannot run fastctx serve
Facets
cli-tool · maturity active
mcp search-engine developer-tools cli file-system parser developer-tools large-language-models rust cli cross-platform mcp-server coding-agents context-efficiency repository-tools codex file-search command-line ai-agents nodejs
1 source
- readme: https://github.com/yc-duan/fastctx · fetched 2026-08-28 · f32b0fc07143
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| yc-duan/fastctx | main | 80 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem