What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
To reduce avoidable token use in a new Claude Code session, give it the task, the result you need, only the project context it cannot infer, and any essential constraint or check. Keep recurring project guidance concise in CLAUDE.md, and leave occasional procedures to on-demand skills. There is no published, reliable percentage for how many tokens this approach saves.
Write a compact prompt that still gives Claude what it needs
A short prompt is useful only if it preserves the information needed to do the work correctly. Anthropic’s prompting guidance recommends clear, direct instructions, with relevant context, output format, and constraints stated explicitly: Claude prompting best practices.
![Claude AI for Beginners Bible: [5 in 1] The Ultimate Guide to Automate Your Work, Save Hours Every Week, and Use AI for Real-World Results](https://m.media-amazon.com/images/I/415+fSJacsL._SL160_.jpg)
- Task: Name the concrete change or question.
- Outcome: Say what you want back, such as a code change, explanation, or report.
- Necessary context: Include project facts Claude cannot reliably infer.
- Constraints and checks: Specify important boundaries and how to verify the result.
For example: “In this repository, update the login form to validate email addresses. Follow the existing component patterns, add or update focused tests, and report the files changed and test result. First inspect the relevant component and its tests; do not summarize unrelated parts of the repository.” This is a practical illustration, not a tested token-minimization formula.
Avoid broad repository tours, generic coding advice, and unrelated history from previous tasks when the code or project instructions already provide that information. Do not omit acceptance criteria or project-specific constraints merely to make the prompt shorter.
#1 Best Overall
Trim the context Claude Code loads automatically
Claude Code reads applicable CLAUDE.md files as session context. These files hold persistent project, personal, or organization guidance; they are instructions, not enforced configuration. Files in the current and parent directory hierarchy can all apply, and their contents are concatenated. See Anthropic’s Claude Code memory documentation.
Keep always-loaded instructions focused
Anthropic recommends targeting fewer than 200 lines per CLAUDE.md. This is guidance, not a tool-enforced limit. Put durable, broadly useful material there: build and test commands, coding conventions, architecture decisions, naming rules, and recurring workflows. Long instruction files consume context and may be followed less consistently.
Scope instructions to the work that needs them
Rules for one part of a codebase can live in path-scoped instructions rather than applying to every task. In a monorepo, check which parent and project instruction files are loaded; where appropriate, use claudeMdExcludes to exclude irrelevant ancestor or other-team files. Nested instruction files are discovered as Claude enters relevant subdirectories. Starting Claude Code from the intended project root or subproject can also avoid loading guidance from an unnecessarily broad parent directory.
Move occasional procedures into skills
Instructions needed only for particular workflows can be placed in skills, which load on demand, rather than in always-loaded CLAUDE.md content. This is most useful for procedures that are detailed but infrequently needed. Claude Code also has auto memory; Anthropic’s current documentation says each session loads only its first 200 lines or 25KB.
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Check and manage context during a session
Use Claude Code’s slash commands to see what is in context and avoid carrying irrelevant history into later work:
/usageshows current token usage./contextshows what is consuming context./clearstarts a fresh session, which is appropriate when switching to unrelated work./compactsummarizes a continuing session. You can specify what the summary should retain, such as code samples, API usage, test output, or changes made.
Anthropic says Claude Code automatically uses prompt caching for repeated content and auto-compaction near context limits. These mechanisms do not make unnecessary context free: the amount of context still matters. See the current Claude Code cost guidance.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Choose models and tools for the task
Anthropic recommends Sonnet for most coding tasks and reserving Opus for complex architectural decisions or multi-step reasoning. Its cost guidance also recommends disabling MCP servers that are not actively used and preferring a CLI tool when practical, since CLI tools do not add per-tool listing overhead in the same way.
Reasoning controls are model-specific. Anthropic’s current prompting guidance says Opus 4.6 can explore extensively at high effort, increasing thinking-token use and response time; when that behavior is undesirable, constrain reasoning explicitly or lower effort. Do not assume the same behavior or setting applies to every model or version: consult the current documentation for the model in use.
Best Value
- Book - 1, 000 books to read before you die: a life-changing list (1000 before you die)
- Language: english
- Binding: hardcover
What token savings can you expect?
Anthropic’s cited documentation does not publish a fixed token-savings percentage for rewriting the first Claude Code prompt. The practical aim is to remove irrelevant prompt and session context while retaining the task information needed for a correct result—not to target an unsupported savings number.
One separate finding in Anthropic’s long-context prompting guidance says queries placed at the end can improve response quality by up to 30% in certain tests. That is a response-quality result, not a token-reduction estimate. For a long input, put the source material before the specific request; do not treat the figure as a promise for Claude Code sessions.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
