Use this guide to create, structure, and run Carbon toolchain tests with the `file_test` infrastructure. It explains test headers, split cases, failure prefixes, focused SemIR output, and how to regenerate expected output with the updater.
Use this skill to guide an AI assistant working in the Carbon repository on viewing, searching, and editing files with specialized environment tools. It also sets rules for temporary files and when custom programs may be used.
Follow the Carbon project's Bazel workflow through Bazelisk, a version-managing launcher. Learn commands for building targets, running tests and binaries, enabling AddressSanitizer, and refreshing cached state after system dependency changes.
Use this guide to manage Carbon repository changes with Jujutsu (jj), a Git-compatible version control system. It covers status, diffs, commits, remote syncing, and change stacks, including how to identify a stack's base and handle history safely.
Use this skill to write a complete report of changes in Carbon toolchain testdata. It shows how to identify diffs, extract input and output changes, group related edits, list affected files, and validate that every change is represented.
Prepare and manage Carbon evolution proposals using the project’s template and conventions. Connect the proposal to project goals, explain alternatives and tradeoffs, incorporate decisions from a lead issue, and keep its abstract aligned with the pull request description.
Use this skill to implement builtin functions in the Carbon compiler, from registering a function name and checking its signature to evaluating constant calls and generating LLVM IR for runtime calls. It also covers prelude bindings and focused tests.
Apply Carbon toolchain conventions for formatting Bazel, C++, Carbon, Markdown, and Python files. The skill also covers clear comments and documentation, accurate names, design choices, and concise commit descriptions.
Use this skill to read GitHub issue details and comments from the command line with `gh`. It covers issues referenced by number or URL, including issues in other repositories, and keeps access read-only so issue state is not changed.
Run `prek`, Carbon's pre-submit style and lint checker, across all files or selected changes. The skill explains its Jujutsu helper, how to handle hooks that rewrite files, and a `gpkg` workaround for dependency or security policy errors.
Use this skill to add or revise diagnostics in the Carbon toolchain. It explains how to register message kinds, format typed arguments, attach source labels and context, and verify that diagnostics follow the project’s wording and test coverage rules.
Use `gh`, the GitHub command-line tool, to list, inspect, and search issues, pull requests, repositories, and code. The skill also explains read-only REST and GraphQL queries, pagination, and ways to filter or format returned data.
Use this skill to review changes in compiler test output and decide whether they match the intended code change. It explains how to assess user-visible diagnostics separately from internal output, spot hidden regressions, and verify tests after automatic updates.
Use this skill when developing Carbon’s language server or its VS Code extension. It describes request handling, document types, the SemIR text reader, and how to write and update file-based tests that exercise LSP requests and responses.
Use this skill to navigate and work on the Carbon compiler toolchain. It explains the compiler phases, code organization, build and test commands, debugging practices, and implementation conventions so you can make and investigate changes consistently.
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