cc-streak — Error-Free Streaks in Claude Code

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median successful tool calls between errors
6,221 streaks across 1,994 sessions · longest: 829

1,994

Sessions

6,221

Streaks

Median

22.3

Mean

P90

829

Max

Streak length distribution

How long Claude runs before the next error

1-2 calls

16.7%

1,036

3-5

15.3%

954

6-20

36.2%

2,254

21-50

21.3%

1,328

51-100

7.3%

455

101+

3.1%

194

Streak breakers

Which tool ends the error-free run?

Bash

51.5%

3,358

Read

24.0%

1,562

Edit

9.5%

617

WebFetch

5.8%

380

Write

2.8%

180

What this means

Median 12 calls between errors — Claude hits roughly 1 error every 12 tool calls
36% of streaks are 6-20 calls — the sweet spot. Long enough to make progress, short enough to be typical
Bash breaks 52% of all streaks — shell commands are the #1 source of streak-ending errors
3.1% reach 100+ calls — marathon streaks exist but are rare. The longest: 829 consecutive successes
Mean (22) > Median (12) — right-skewed distribution. A few very long streaks pull the average up