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Introduction

What is PRECC?

PRECC (Claude Code için Tahminsel Hata Düzeltme) is a Rust tool that intercepts Claude Code bash commands via the official PreToolUse hook mechanism. It fixes errors before they happen, saving tokens and eliminating retry loops.

Topluluk kullanıcıları için ücretsiz.

The Problem

Claude Code wastes significant tokens on preventable mistakes:

  • Wrong-directory errors – Running cargo build in a parent directory that has no Cargo.toml, then retrying after reading the error.
  • Retry loops – A failed command produces verbose output, Claude reads it, reasons about it, and retries. Each cycle burns hundreds of tokens.
  • Verbose output – Commands like find or ls -R dump thousands of lines that Claude must process.

The Four Pillars

Bağlam Düzeltme (cd-prepend)

cargo build veya npm test gibi komutların yanlış dizinde çalıştığını algılar ve yürütmeden önce cd /doğru/yol && ekler.

GDB Debugging

Detects opportunities to attach GDB for deeper debugging of segfaults and crashes, providing structured debug information instead of raw core dumps.

Session Mining

Mines Claude Code session logs for failure-fix pairs. When the same mistake recurs, PRECC already knows the fix and applies it automatically.

Automation Skills

A library of built-in and mined skills that match command patterns and rewrite them. Skills are defined as TOML files or SQLite rows, making them easy to inspect, edit, and share.

How It Works (30-Second Version)

  1. Claude Code is about to run a bash command.
  2. The PreToolUse hook sends the command to precc-hook as JSON on stdin.
  3. precc-hook runs the command through the pipeline (skills, directory correction, compression) in under 3 milliseconds.
  4. The corrected command is returned as JSON on stdout.
  5. Claude Code executes the corrected command instead.

Claude never sees the error. No tokens wasted.

Adaptive Compression

Bir komut sıkıştırmadan sonra başarısız olursa, PRECC bir sonraki denemede sıkıştırmayı otomatik olarak atlar ve Claude hata ayıklama için tam sıkıştırılmamış çıktıyı alır.

Live Usage Statistics

MetricValue
Hook invocations–
Tokens saved–
Saving ratio–%
RTK rewrites–
CD corrections–
Hook latency– ms (p50)

Rakamlar tahmindir. Her önlenen hata tam bir yeniden deneme döngüsünü önler: hata çıktısı, model akıl yürütmesi ve yeniden deneme komutu. These numbers update automatically from anonymized telemetry.