Read

Reading means the whole file, top to bottom. Grep, keyword search, and offset/limit reads are for locating files only, never as the reading itself.

Steps

1. List the files the task touches: the plan/doc for the feature, the files to change, their direct callers and callees, and their existing tests.
2. Read each one in full. If a file is over the Read limit, keep reading in consecutive chunks until the end. No file is skipped because it looks familiar. Skip only a file already read in full earlier in this session and unchanged since.
3. Say in one line which files you read. Name any you did not and why.
4. Only then plan or edit. If a later step pulls in a new file, read it in full too.