Feature request: Highly specific AI helper functions

[Joshfindit]

Overall goal: To reduce context window usage

Suggestions:

1. Pull specific line numbers from a file (takes single line or start and end)
2. Pull the whole "section" from a file. This is an ambitious request as it involves analyzing code structure but it can be built up slowly.
   • Markdown: Pull the everything nested under a header
   • JS/TS/Go/Rust: Pull a function definition
3. File identification via file. Helpful to avoid loading binary files masquerading as text files
4. Incremental/Patch-Based File Editing
   • Grants the ability to apply multiple non-contiguous changes in a single tool call
5. Symlink management including resolving symlink targets
6. Modify tree to have a ".treeignore" concept. It's common that the agent trees a folder containing .git, node_modules, or other deep dev folders. It would be nice for the agent to get "path": "/home/josh/project/.git", "type": "ignored by .treeignore. call just this path to tree it anyway"