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Cursor can search a React repository, edit related files, run terminal commands, and suggest code as you work. But those capabilities do not establish that it improved a particular codebase—or that seven changes happened instantly. Without the actual before-and-after diff and verification results, it would be misleading to present seven improvements as observed facts.
What Cursor can do with an existing React project
Cursor’s documentation describes an AI coding editor designed to help developers understand repositories, build features, find and fix bugs, review changes, and work with developer tools. Its documentation presents these as product workflows, not guarantees that a generated change is correct.
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For a React project, repository context could help investigate component ownership, shared hooks, routing, or where a behavior is implemented. Those are useful questions to ask of a codebase, not verified outcomes from the experiment implied by the original title.
Three distinct ways to work with the code
| Workflow | What Cursor documents | What that does not prove |
|---|---|---|
| Agent | Searches code, edits across files, runs terminal commands, and can work on features, refactors, bugs, and tests. Cursor’s Agent guide describes this workflow. | That the edits are correct, accepted, or an improvement in a particular project. |
| Tab | Autocomplete that can predict code and suggest multi-line edits, as described on Cursor’s features page. | That suggestions were used or reduced work in a measured way. |
| Inline Edit | Applies a natural-language instruction to selected code or generates code; Cursor’s quickstart introduces it alongside Tab and Agent. | That an edit was better than the original without reviewing and testing it. |
These workflows differ in scope and autonomy. A selected-code edit is not the same as asking an agent to search and modify several files; autocomplete is different again. Cursor’s quickstart also demonstrates asking Agent to create and run tests, but that example is not evidence that tests passed in any other project.
How project rules can shape React edits
Cursor documents reusable project instructions in version-controlled .cursor/rules files and through AGENTS.md. Rules can describe conventions, domain knowledge, or workflows so that an agent has project-specific guidance. Cursor’s rules documentation explains the supported approach.
Rules can tell an assistant how a team expects code to be organized; their presence alone does not show that code became more consistent. A defensible account would identify the rules in use and point to the specific diff they influenced.
What evidence would support “seven improvements”
To report seven concrete results, each item needs a traceable before-and-after account. The useful evidence is:
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- The files changed and the resulting diff, including whether the author accepted or revised the edits.
- The Cursor version and model used, so readers know the setup behind the result.
- The checks actually run—such as relevant tests, linting, type checking, or a build—and their outcomes.
- Elapsed time only if it was measured, with the measurement method stated.
A diff shows what changed; passing checks provide evidence about specific failure modes, not proof that every change is sound. Human review still matters. Cursor describes reviewing diffs and running checks as part of its workflows in its documentation; an article should report the checks the author actually performed rather than treating an agent’s claim of success as verification.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What Cursor says about repository indexing
Cursor’s security page says codebase indexing is enabled by default but can be disabled, and that files matched by .gitignore or .cursorignore are excluded. The page describes scanning the opened folder, syncing a Merkle tree of file hashes, periodically checking for hash mismatches, and storing embeddings with obfuscated relative paths and line ranges. These are Cursor’s own descriptions of its system; implementation and settings can change, so consult the live page before deciding what to index.
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