sed

Stream editor for deterministic, line-oriented text transformation and filtering.

Quick Start

1. Verify sed is available: sed --version or man sed
2. Establish the command surface: man sed or sed --help
3. Start with a read-only probe: sed 's/old/new/' file.txt

Intent Router

Load only the reference file needed for the active request.

• references/install-and-setup.md — Installing sed (GNU, BSD) on macOS, Linux, Windows
• references/cheatsheet.md — Common flags, substitution, line selection, deletion, extended regex
• references/advanced-usage.md — Multi-line patterns, address ranges, branching, hold space, GNU vs BSD differences
• references/troubleshooting.md — Regex escaping, in-place edit failures, performance, encoding issues