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Cut Your Claude Code Token Usage in Half
48 diagnostic symptoms for Claude Code cost — subagents, MCP server overhead, context window bloat and cache misses: what each looks like, what it costs, and what to change.
This book is 100% completeLast updated on 2026-08-21
Claude Code users routinely spend more on tokens than they expect, and cannot see where the money goes. Chapter 8 catalogues 48 diagnostic symptoms — what each one looks like, what it costs you, and what to change — with a fix where a fix exists, and an honest "unresolved" where none does yet. Chapter 7 puts before-and-after numbers against the changes, measured on the author's own unattended runs, and Chapter 9 collects the settings templates.
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This book is part of the Claude Code Operator's Library (4 books). Through September 17, 2026, that bundle is in Leanpub's monthly sale at $14.50 for all four, against $51.96 if bought separately. Coupon link: https://leanpub.com/b/cc-operators-library/c/LeanpubMonthlySale202609010
Claude Code users routinely spend more on tokens than they expect, and cannot see where the money goes. This guide diagnoses specific token-waste patterns with real cost data from the author's own production Claude Code operation, then gives measured fixes: why costs spike overnight and the first settings to check; the hidden costs of sub-agents, thinking tokens, and context-window bloat; and a chapter-by-chapter diagnostic workflow with real dollar figures. Chapter 8 alone is a catalogue of 48 diagnosable symptoms, each with what it looks like, what causes it, and what to change. Revised edition of 2026-08-21: 11 chapters, 89 pages. Chapter 10 adds the April 2026 incidents — the cache TTL silent change, the v2.1.100 cache_creation inflation, and a $1,446 unauthorized transfer traced to its cause. Chapter 11 adds May 2026, the month single failures became clusters: silent skips, silent model swaps, sub-agent boundary gaps, and a $6,000 overnight quota burn. Not theory and not prompt packs: symptoms you can match against your own session, copy-paste templates, and measurements rather than reasoning. Written against Claude Code as it stood through mid-2026 — what carries over is the diagnostic method and the numbers behind it. Updates are free to buyers.
Written by an independent operator who runs Claude Code autonomously and maintains cc-safe-setup, a free MIT-licensed collection of 914 example safety hooks: https://github.com/yurukusa/cc-safe-setup
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Author
About the Author
yurukusa
Everything I publish starts from something that actually broke.
I run Claude Code on real projects, often unattended, and I have lost work to it. Most of what the books catalogue did not happen to me, though. It happened to other people, in public: every incident is tied to a numbered issue you can open and read, including the ones that were closed without a fix. The hooks in cc-safe-setup (MIT, open source) exist because I wanted a floor under an agent nobody was watching, and I would rather show you a stranger's incident with a link than a story of my own without one.
Two things I hold myself to. If a number in one of my books is not something I measured, it says so. And if a command is printed, the output beside it came back from an actual run — failures included, because a check that cannot fail is not a check.
I am not selling certainty. Most of what I know here, I learned by breaking my own setup.
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