Lesson 2.5Lesson 12 of 30

Built-in tools (Read, Write, Edit, Bash, Grep, Glob)

Select and apply built-in tools (Read, Write, Edit, Bash, Grep, Glob) effectively

Key points

1Grep searches file contents (callers, error messages). Glob matches file paths by pattern (**/*.test.tsx).
2Edit changes a file by matching a unique piece of text. Read and Write work with whole files.
3If Edit fails because the anchor text is not unique, fall back to Read + Write of the file.
4Build understanding step by step: Grep for the entry points, Read to follow imports. Don't read the whole codebase upfront.
5Behind a wrapper module, list what it exports, then Grep for each exported name.

What the exam guide checks here

Objective wording from the exam guide (English).

2.5.K1Grep searches file contents
2.5.K2Glob matches file paths by pattern
2.5.K3Read/Write for whole files; Edit for targeted changes via unique text match
2.5.K4When Edit fails on non-unique match, fall back to Read + Write
2.5.S1Use Grep to find callers or error messages across the codebase
2.5.S2Use Glob for naming patterns (**/*.test.tsx)
2.5.S3Read then Write when Edit has no unique anchor
2.5.S4Build understanding incrementally: Grep entry points, Read to follow imports, not read everything upfront
2.5.S5Trace usage through wrapper modules: list exported names, then search each

Answer scenario questions on this topic. Every option comes with an explanation.