Tool Sd

tool-sd

When To Use

• Apply straightforward search-and-replace updates in files.
• Replace fragile sed one-liners with readable syntax.
• Pair with fd or rg to run controlled batch edits.

Trusted Commands

sd 'old' 'new' file.ts
sd -p 'old' 'new' file.ts
sd 'v(\\d+)' 'version-$1' file.txt
fd -e ts -x sd 'old' 'new' {}
rg -l 'old_api' | xargs sd 'old_api' 'new_api'

Safe Defaults

• Use -p preview mode before in-place bulk replacements.
• Scope candidate files first with fd or rg -l.
• Use -F for literal matching when regex should be disabled.

Common Pitfalls

• sd uses regex by default and may over-match literal text.
• In-place edits can change many files quickly without warning.
• Large batch replacements are risky without diff review.

Output Interpretation

• Standard mode edits files in place and prints minimal output.
• Preview mode (-p) shows what would change without writing.

Why It Matters For Agents

• Faster and safer than sed for common multi-file text migrations.
• Integrates cleanly with fd/rg-driven candidate selection.

Repo Conventions

• Prefer sd over brittle sed expressions for cross-platform replacement.
• Keep bulk edits tightly scoped to task-relevant files.

Trigger Examples

• Should trigger: "Replace this deprecated flag name in all docs files."
• Should trigger: "Batch-update import path strings safely."
• Should not trigger: "Analyze AST-level method call patterns."