Analyze session tool diversity in Claude Code — how many tools does each session mix?
npx cc-mix
Zero dependencies. Reads ~/.claude/projects/ directly.
cc-mix — Session Tool Diversity Analyzer
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Sessions: 1,835 (≥5 tool calls)
Unique Tools per Session
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1 tool ██████░░░░░░░░░░░░░░ 160 (8.7%)
2 tools ██████████████░░░░░░ 377 (20.5%)
3 tools ████████████████████ 545 (29.7%) ← mode
4 tools ███████████████░░░░░ 402 (21.9%)
5 tools ████░░░░░░░░░░░░░░░░ 102 (5.6%)
...
10+ tools ███░░░░░░░░░░░░░░░░░ 89 (4.9%)
p10 2 median 3 mean 3.8 p90 7 max 20
Solo Sessions (1 tool only)
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Bash ████████████████ 84 (53% of solo)
Read ████████░░░░░░░░ 40 (25% of solo)
WebSearch ██████░░░░░░░░░░ 32 (20% of solo)
Toolset Lock-in (when is the full toolset decided?)
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By 10% through ███░░░░░░░░░░░░░ 320 (17.4%)
By 25% through ██████░░░░░░░░░░ 703 (38.3%)
By 50% through ██████████░░░░░░ 1124 (61.3%)
By 75% through ████████████░░░░ 1410 (76.8%)
Median lock-in: 38% through the session
- 3 is the magic number: 29.7% of sessions use exactly 3 tools — the most common count by far
- 8.7% are solo sessions: Bash (53%), Read (25%), WebSearch (20%). Pure-focus work
- Toolset decided early: by the halfway mark, 61% of sessions have introduced all their tools. You pick your toolkit in the first third
- Power sessions: 4.9% use 10+ tools — full-stack days with planning, research, coding, and verification
- Top 3-tool combo: Bash+Grep+Read (33.8%) — the "search and understand" session
npx cc-mix --count=3 # what tool combos use exactly 3 tools
npx cc-mix --count=1 # what tool is used in solo sessions
npx cc-mix --count=10 # what do power sessions look like
npx cc-mix --json # raw datayurukusa.github.io/cc-mix — drag and drop your projects folder. Includes a lock-in timeline visualization.
Part of cc-toolkit — tools for understanding your Claude Code sessions.
Claude Code Ops Kit ($19) — 16 production hooks + 5 templates + 3 tools. Built from 160+ hours of autonomous operation.
Source: yurukusa/cc-mix