Anthropic cuts Claude Code prompt 80%, adds /doctor

// 1h agoPRODUCT UPDATE

Anthropic cuts Claude Code prompt 80%, adds /doctor

Anthropic updated the Claude Code agent harness, reducing its default system prompt size by 80% in favor of progressive skill disclosure. The update introduces a `/doctor` command to help developers right-size context, eliminate over-constrained rules, and optimize prompt configuration files such as `CLAUDE.md`.

// ANALYSIS

Trimming system prompt overhead is a major win for developer velocity and context window efficiency in agentic coding environments.

* Cutting prompt overhead by 80% preserves valuable context tokens for codebase reasoning and reduces output latency.

* Progressive skill disclosure enables agents to retrieve instructions dynamically only when needed rather than loading monolithic prompts upfront.

* The `/doctor` command provides actionable insights for developers to clean up legacy rules and maintain lightweight configuration files.

// TAGS

anthropicclaude-codeai-codingsystem-promptdevtoolcontext-optimization

DISCOVERED

1h ago

2026-07-26

PUBLISHED

1h ago

2026-07-26

RELEVANCE

9/ 10

AUTHOR

Discover AI

// KEEP READING

More AI developer news from the feed

EXPLORE FULL FEED

OPEN SOURCE3h ago

ctx indexes local coding agent history into SQLite

ctx is an open-source Rust CLI tool designed to index transcript histories from local AI coding agents like Claude Code and Codex into a local SQLite database. By unifying transcripts across tools, ctx enables developers to run fast keyword and file-based queries directly from their terminal to retrieve context without manual log digging.

OPEN SOURCE3h ago

CodeAlmanac converts agent sessions into repo wiki

CodeAlmanac is an open-source documentation tool that captures implicit repository context from finished AI coding agent sessions. By transforming agent transcripts into a structured almanac directory containing architectural rationale, execution flows, system invariants, and known gotchas, it maintains a living repository wiki.

UPDATE5h ago

Ruff v0.16.0 expands default rules, adds Markdown formatting

Astral released Ruff v0.16.0, expanding its default Python linting rules from 59 to 413 to catch syntax errors and runtime bugs out of the box. The update also adds support for formatting embedded Python code blocks in Markdown and Quarto files alongside new line-level suppression comments.