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When Copilot needs to understand a symbol's implementation during code analysis or generation tasks, it invokes this tool which queries the C/C++ extension's IntelliSense index to retrieve the definition location, type information, and associated metadata. This enables Copilot to ground its reasoning in actual codebase structure rather than relying on pattern matching or generic knowledge.","intents":["Help Copilot understand what a C++ function or class does by fetching its actual definition","Enable Copilot to generate code that correctly uses project-specific types and APIs","Allow Copilot to trace symbol origins when analyzing code dependencies"],"best_for":["C++ developers using GitHub Copilot for code generation and refactoring","Teams building large C++ codebases where Copilot needs project-specific context"],"limitations":["Depends entirely on C/C++ extension's IntelliSense indexing — incomplete or stale indexes will return incomplete symbol metadata","Symbol resolution limited to workspace scope; cannot resolve external library symbols unless headers are indexed","No effect if GitHub Copilot is not installed or active"],"requires":["GitHub Copilot extension (mandatory)","Microsoft C/C++ extension for VS Code","VS Code 1.60+ (inferred from extension dependencies)"],"input_types":["symbol name (string)","file context (optional)"],"output_types":["definition location (file path + line number)","symbol metadata (type, scope, declaration)"],"categories":["tool-use-integration","code-generation-editing"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"vscode-ms-vscode-cpp-devtools__cap_1","uri":"capability://tool.use.integration.workspace.wide.c.symbol.reference.discovery.for.copilot.reasoning","name":"workspace-wide c++ symbol reference discovery for copilot reasoning","description":"Exposes a tool that finds all references to a given C++ symbol across the entire workspace, enabling Copilot to understand usage patterns and dependencies. When Copilot needs to refactor code or understand impact analysis, it queries this tool which leverages the C/C++ extension's symbol index to return all locations where a symbol is referenced, helping Copilot reason about breaking changes or safe refactoring boundaries.","intents":["Help Copilot understand how widely a function or variable is used before suggesting changes","Enable Copilot to identify all callers of a function for impact analysis","Allow Copilot to suggest refactorings with confidence by knowing all usage sites"],"best_for":["C++ developers refactoring large codebases with Copilot assistance","Teams needing impact analysis before API changes"],"limitations":["Reference discovery limited to indexed workspace — external dependencies and dynamically-loaded symbols not included","Performance degrades on very large codebases (100k+ lines) due to full-workspace scanning","Macro expansions and template instantiations may be missed or incorrectly attributed"],"requires":["GitHub Copilot extension","Microsoft C/C++ extension with active IntelliSense indexing","Workspace must be fully indexed (may take seconds to minutes on large projects)"],"input_types":["symbol name (string)","optional scope filter (file or namespace)"],"output_types":["array of reference locations (file path + line number + context)"],"categories":["tool-use-integration","search-retrieval"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"vscode-ms-vscode-cpp-devtools__cap_10","uri":"capability://automation.workflow.cmake.configuration.state.awareness.for.tool.execution.context","name":"cmake configuration state awareness for tool execution context","description":"Maintains awareness of the active CMake configuration in the VS Code workspace and uses this configuration as the execution context for all build and test operations. 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Copilot uses this to reason about control flow, identify bottlenecks, or understand execution paths when analyzing or generating code that interacts with existing functions.","intents":["Help Copilot understand the execution context and callers of a function","Enable Copilot to identify which functions a given function depends on","Allow Copilot to suggest optimizations by understanding call patterns"],"best_for":["C++ developers optimizing performance-critical code with Copilot","Teams analyzing call chains for refactoring or debugging"],"limitations":["Call hierarchy limited to statically-resolvable calls; virtual function calls and function pointers may not be fully resolved","Indirect calls through callbacks or function pointers not reliably captured","Performance impact on large codebases with deep call chains (100+ levels)"],"requires":["GitHub Copilot extension","Microsoft C/C++ extension with IntelliSense enabled","Function must be defined in indexed workspace"],"input_types":["function name (string)","optional file context"],"output_types":["incoming calls array (callers)","outgoing calls array (callees)","each with location and context"],"categories":["tool-use-integration","planning-reasoning"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"vscode-ms-vscode-cpp-devtools__cap_3","uri":"capability://tool.use.integration.cmake.driven.project.build.execution.triggered.by.copilot.agent","name":"cmake-driven project build execution triggered by copilot agent","description":"Exposes the ability to execute a project build using the active CMake configuration as a callable tool within Copilot's agent reasoning. 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This enables Copilot to verify that generated code compiles and integrates correctly with the project's build system.","intents":["Allow Copilot to validate generated code by building it against the actual project","Enable Copilot to iterate on code generation based on build failures","Help Copilot understand project-specific build requirements and compiler flags"],"best_for":["C++ developers using Copilot for code generation who want automated build validation","Teams with complex CMake configurations needing Copilot to respect build settings"],"limitations":["Build execution is synchronous and blocking — large builds (5+ minutes) will timeout or hang Copilot reasoning","CMake-only; other build systems (Make, Bazel, Ninja standalone) not supported","Requires active CMake configuration in VS Code — will fail if no CMakeLists.txt or configuration is set","Build output captured but not streamed; Copilot sees only final status and error messages"],"requires":["GitHub Copilot extension","Microsoft CMake Tools extension","CMakeLists.txt in workspace root","Active CMake configuration (must be configured before build can execute)"],"input_types":["optional target name (string) — if omitted, builds default target"],"output_types":["build status (success/failure)","build output (stdout/stderr)","exit code (integer)"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"vscode-ms-vscode-cpp-devtools__cap_4","uri":"capability://tool.use.integration.ctest.based.test.execution.and.validation.via.copilot.agent","name":"ctest-based test execution and validation via copilot agent","description":"Exposes the ability to execute the project's test suite using CTest (CMake's test runner) as a callable tool within Copilot's agent reasoning. When Copilot generates code or refactors existing code, it can invoke this tool to run tests using the active CTest configuration, capturing test results and failure details. This enables Copilot to validate that generated or modified code does not break existing functionality.","intents":["Allow Copilot to run tests after generating code to ensure correctness","Enable Copilot to iterate on code generation based on test failures","Help Copilot understand test coverage and requirements through test execution"],"best_for":["C++ developers using Copilot for test-driven development or refactoring","Teams with comprehensive test suites who want Copilot to validate changes"],"limitations":["Test execution is synchronous and blocking — large test suites (10+ minutes) will timeout or hang Copilot reasoning","CTest-only; other test runners (Google Test CLI, Catch2 standalone) not directly supported unless wrapped in CTest","Requires active CMake configuration with tests registered via add_test()","Test output captured but not streamed; Copilot sees only summary and failure messages"],"requires":["GitHub Copilot extension","Microsoft CMake Tools extension","CMakeLists.txt with add_test() or enable_testing() directives","Active CMake configuration with tests registered"],"input_types":["optional test filter (string) — if omitted, runs all tests"],"output_types":["test results (passed/failed count)","failure details (test name, assertion, output)","exit code (integer)"],"categories":["tool-use-integration","automation-workflow"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"vscode-ms-vscode-cpp-devtools__cap_5","uri":"capability://tool.use.integration.cmake.build.target.enumeration.for.copilot.context","name":"cmake build target enumeration for copilot context","description":"Exposes a tool that lists all available CMake build targets in the project, enabling Copilot to understand what can be built and make informed decisions about which targets to build or reference. 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When Copilot needs to understand test coverage or generate test-related code, it queries this tool to retrieve the list of tests registered with CTest.","intents":["Help Copilot understand what tests are available in the project","Enable Copilot to generate test commands that reference valid test cases","Allow Copilot to suggest appropriate tests to run based on code changes"],"best_for":["C++ developers with comprehensive test suites who want Copilot to understand test structure","Teams using CTest for test management and validation"],"limitations":["Returns only test names; does not include test properties, fixtures, or dependencies","Requires active CMake configuration with tests registered","Does not include test source files or test code"],"requires":["GitHub Copilot extension","Microsoft CMake Tools extension","CMakeLists.txt with add_test() directives","Active CMake configuration"],"input_types":[],"output_types":["array of test names (strings)","optional test properties (labels, fixtures)"],"categories":["tool-use-integration","data-processing-analysis"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"vscode-ms-vscode-cpp-devtools__cap_7","uri":"capability://tool.use.integration.github.copilot.agent.mode.integration.for.c.tooling","name":"github copilot agent mode integration for c++ tooling","description":"Provides the foundational integration layer that exposes all C++ and CMake tools as callable functions within GitHub Copilot's agent reasoning mode. This capability acts as a bridge between Copilot's agent loop and VS Code's C++ development environment, registering tools that Copilot can invoke during multi-step reasoning tasks. The extension implements the tool registration protocol that allows Copilot to discover, invoke, and consume results from C++ symbol resolution, build, and test tools.","intents":["Enable Copilot to reason about C++ code with access to real project context","Allow Copilot to execute build and test operations as part of multi-step code generation workflows","Provide Copilot with structured data about project structure and dependencies"],"best_for":["C++ developers using GitHub Copilot for code generation and refactoring","Teams wanting Copilot to understand project-specific build and test context"],"limitations":["Requires GitHub Copilot extension — extension has no effect without it","Tool invocation is synchronous; long-running operations (builds, tests) block Copilot reasoning","No custom model support — tightly coupled to GitHub Copilot's models and reasoning engine","Tool availability depends on VS Code extension ecosystem (C/C++ and CMake Tools must be installed)"],"requires":["GitHub Copilot extension (mandatory)","Microsoft C/C++ extension","Microsoft CMake Tools extension","VS Code 1.60+ (inferred)"],"input_types":["tool invocation requests from Copilot agent"],"output_types":["structured tool results (JSON or text)"],"categories":["tool-use-integration","planning-reasoning"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"vscode-ms-vscode-cpp-devtools__cap_8","uri":"capability://memory.knowledge.vs.code.intellisense.backed.c.code.understanding.for.copilot","name":"vs code intellisense-backed c++ code understanding for copilot","description":"Leverages the Microsoft C/C++ extension's IntelliSense engine to provide Copilot with accurate, real-time symbol information, type definitions, and code structure data. Rather than relying on pattern matching or generic LLM knowledge, this capability grounds Copilot's reasoning in the actual parsed and indexed C++ codebase, including type information, scope resolution, and declaration/definition relationships.","intents":["Provide Copilot with accurate type information for code generation","Enable Copilot to understand scope and namespace relationships in C++ code","Allow Copilot to generate code that respects project-specific type definitions and APIs"],"best_for":["C++ developers with complex type systems and custom APIs","Teams with large codebases where generic LLM knowledge is insufficient"],"limitations":["IntelliSense indexing quality depends on C/C++ extension configuration — incomplete indexes limit accuracy","Symbol resolution limited to workspace scope; external libraries not indexed unless headers are in workspace","Indexing latency on large codebases (100k+ lines) may cause delays in Copilot reasoning","Template instantiation and macro expansion may be incomplete or incorrect"],"requires":["Microsoft C/C++ extension with IntelliSense enabled","GitHub Copilot extension","Workspace must be indexed (automatic but may take time on first load)"],"input_types":["symbol names, file paths, code locations"],"output_types":["type information, definitions, references, call hierarchies"],"categories":["memory-knowledge","code-generation-editing"],"confidence":0.5,"matches":0,"success_rate":0},{"id":"vscode-ms-vscode-cpp-devtools__cap_9","uri":"capability://safety.moderation.telemetry.controlled.usage.tracking.for.extension.and.copilot.interactions","name":"telemetry-controlled usage tracking for extension and copilot interactions","description":"Collects and reports usage data about how developers interact with the C++ DevTools extension and its Copilot integration, sending telemetry to Microsoft. 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