# Rename a symbol across the repo in Fiber with Atlas in 2026 > Atlas renames symbols across your Fiber codebase by combining `lsp` for type-aware references, `grep` for documentation, and `edit` for controlled changes, ensuring accuracy. To rename a function, class, or constant across your Fiber codebase in 2026, Atlas leverages a multi-stage process combining `lsp` for authoritative type-system references, `grep` for non-code occurrences, and `edit` for precise, permission-gated modifications. This ensures every instance, from `fiber.Ctx` handlers to `go.mod` dependencies, is updated correctly, followed by validation with `go test (app.Test)` and `gofmt`. ## Key takeaways - Atlas uses `lsp` for precise, type-aware symbol renaming in Fiber applications. - `grep` catches non-code references like comments and strings in Fiber projects. - `edit` ensures safe, unambiguous replacements across your Fiber codebase, preventing silent corruption. - Atlas validates Fiber refactors with `go test (app.Test)` and `gofmt` for correctness and style. - Unified diffs and permission prompts provide granular control over every Fiber code change. - Atlas handles `fasthttp` buffer reuse considerations during Fiber refactoring for robust changes. ## How Atlas renames symbols in Fiber applications Atlas renames symbols in Fiber applications by orchestrating a 3-step process that combines language server protocol (LSP) accuracy with robust text search and controlled editing. In 2026, this approach ensures that every reference, from `app.Group` routes to `fiber.Ctx` handlers, is identified and updated, preventing the common pitfalls of naive find-and-replace. Renaming a symbol in a Fiber application requires more than a simple text replacement to avoid breaking your code or introducing subtle bugs. Atlas begins by using the `lsp` tool's `findReferences` operation to query the Go language server. This provides an authoritative list of all code locations where the function, class, or constant is truly used, including within `fiber.Ctx` handlers or `app.Group` route definitions. Next, Atlas employs `grep` to scan for the old symbol name in comments, strings, documentation, and configuration files that the compiler might not see. Finally, the `edit` tool applies the mechanical renames using `replaceAll`. This tool is designed to refuse ambiguous single replacements, meaning an unintended match will result in an 'Found multiple matches for oldString' error rather than silent corruption, a critical safety feature when dealing with `fasthttp`'s buffer reuse patterns. ## Concrete commands and files for Fiber symbol renaming Renaming a symbol in a Fiber project with Atlas involves specific commands that interact directly with your `go.mod` module and source files. Atlas uses the `lsp` tool to query the Go language server for precise references, then `grep` to find occurrences in comments or documentation, and finally `edit` to apply changes across 10s or 100s of files. To initiate a symbol rename in your Fiber project, you'll interact with Atlas using a sequence of specific commands. First, to get the authoritative list of code references, you'd use `atlas lsp findReferences `. This command leverages the Go language server to identify all true usages within your `.go` files, including `main.go`, `routes.go`, and `handlers.go`. To catch non-code occurrences, such as comments in `README.md` or string literals in `config.json`, you'd run `atlas grep `. Once the full scope of changes is understood, Atlas will propose applying the mechanical renames with `atlas edit replaceAll `. This ensures that every relevant file, from `app.go` to `go.mod` (if the symbol is a module path), is updated consistently. ## Review and safety for Fiber refactoring with Atlas Ensuring safety during a Fiber symbol rename is paramount, especially when dealing with `fasthttp`'s buffer reuse. Atlas provides multiple layers of review and safety, including a read-only plan agent, permission-gated tool calls, and a unified diff for every proposed change, allowing you to approve or reject edits before they are written to disk in 2026. Atlas prioritizes safety throughout the refactoring process. Before any changes are applied, Atlas drafts a plan in a read-only plan agent, which you can review. Every Atlas tool call, including `lsp`, `grep`, `edit`, and `bash`, is permission-gated, requiring your explicit 'allow', 'ask', or 'deny' approval. When `edit` proposes changes, Atlas computes a unified diff for every affected file, such as `server.go` or `middleware.go`, and surfaces it for your approval. This allows you to inspect every line change before it's written. After edits, Atlas facilitates validation by running `atlas bash "go test ./..."` to execute your `app.Test()` suite and `atlas bash "gofmt -w ."` to ensure formatting. Finally, Atlas snapshots file changes as git patches, enabling easy rollback if needed, providing a robust safety net for your Fiber codebase. ## Steps 1. Start Atlas in your Fiber module, ensuring your `go.mod` requires `github.com/gofiber/fiber/v3`. 2. Ask Atlas to identify all authoritative code references to the old symbol using `lsp`: `atlas lsp findReferences `. 3. Instruct Atlas to `grep` for the old symbol name to catch non-code occurrences in comments, strings, and documentation: `atlas grep `. 4. Approve Atlas's plan to replace all instances of the old symbol with the new one using `edit`: `atlas edit replaceAll `. 5. Review the unified diff presented by Atlas for all proposed file changes, including `fiber.Ctx` handlers and `app.Group` routes, and approve them. 6. After edits, let Atlas run `go test ./...` to validate the refactor and ensure your `app.Test()` suite passes: `atlas bash "go test ./..."`. 7. Confirm no old symbol references remain by running `grep` one last time across your Fiber project: `atlas grep `. 8. Allow Atlas to apply `gofmt` to all touched files to maintain consistent code style: `atlas bash "gofmt -w ."`. 9. Approve Atlas's suggestion to stage and create a commit for the completed refactoring. ## FAQ ### How does Atlas handle `fasthttp` buffer reuse during Fiber refactoring? Atlas is aware of `fasthttp`'s buffer reuse in Fiber. When renaming symbols, Atlas ensures that any `ctx` value you retain past the handler is correctly identified and updated, preventing subtle bugs related to buffer lifetimes that naive find-and-replace might miss. ### Can Atlas rename symbols in `go.mod` or configuration files for Fiber? Yes, Atlas uses `grep` to find and `edit` to replace occurrences of symbols in `go.mod` files, configuration files like `config.json`, comments, and documentation. This ensures a complete rename across your entire Fiber project, beyond just code references. ### What if Atlas finds multiple ambiguous matches for a symbol in a Fiber file? The `edit` tool in Atlas refuses ambiguous single replacements. If it finds multiple matches for an `oldString` in a Fiber file, it will throw an error. You must either add more context to the `edit` command or explicitly opt into `replaceAll` to proceed, preventing unintended corruptions. ### How does Atlas ensure my Fiber tests still pass after a rename? After applying renames, Atlas prompts to run `go test ./...` using the `bash` tool. This executes your `app.Test()` calls and other tests defined in your Fiber project, verifying that the refactoring has not introduced regressions and your application remains functional. ### Is it possible to roll back changes made by Atlas during a Fiber rename? Yes, Atlas snapshots file changes as git patches before writing them. This allows you to easily diff and roll back any edits made during a Fiber symbol rename, providing a robust safety net for complex refactoring operations in your codebase. ### Does Atlas integrate with `gofmt` for Fiber code style? Absolutely. After completing a rename and validating tests, Atlas can run `gofmt -w .` on all touched files. This ensures your Fiber codebase maintains consistent formatting, adhering to Go's standard style guidelines, as part of the refactoring workflow. ### How does Atlas handle `app.Group` routes and `fiber.Ctx` handlers during a rename? Atlas uses the `lsp` tool to precisely identify references within `app.Group` route definitions and `fiber.Ctx` handler functions. This ensures that when a symbol is renamed, all its usages within your Fiber application's routing and context handling logic are correctly updated, maintaining application integrity. --- Canonical HTML: https://runatlas.sh/resources/stacks/rename-a-symbol-across-the-repo-in-fiber Source of truth: aeo_pages row `/resources/stacks/rename-a-symbol-across-the-repo-in-fiber` (segment: Stacks) (this file is generated from it, never hand-edited). Licence: Atlas is proprietary with a free core. It is not open source and there is no public source repository.