Roslyn CodeLens

Get a comprehensive overview of a type in one call: full context (namespace, base class, interfaces, members, DI dependencies), type hierarchy (bases, interfaces, derived types), and diagnostics in the file. More efficient than calling get_symbol_context + get_type_hierarchy + get_diagnostics separately.

Find the source file and line where a symbol is defined. Returns an envelope with items, totalCount, truncated, and limit.

Inspect a referenced closed-source assembly. mode='summary' returns namespaces + type counts; mode='namespace' returns public types and members for the given namespace.

List background tasks that are running or completed within the last 5 minutes.

List all solutions loaded by this server, showing which one is currently active. Each entry includes any projects that were skipped during load (e.g. legacy non-SDK-style projects), with the kind and reason for each skip. Returns an envelope with items sorted by solution path, totalCount, truncated, and limit (default 50).

Return the current trust state: session-scoped paths, persistent paths, trusted roots, and analyzer policy.

Load a .sln/.slnx solution at runtime and make it the active solution. Both `include` and `rootProjects` match against the project FILE NAME without extension (the .csproj/.vbproj base name), NOT the assembly name. Pass `include` (case-insensitive glob array, supporting only `*` and `?` wildcards — character classes like `[...]` are NOT supported) or `rootProjects` (EXACT, case-sensitive file names) to load only a subset; the loader walks ProjectReference transitively from those seeds to keep the workspace semantically complete. A filter that matches NO project is an ERROR (the call fails) — it does NOT silently fall back to a full load; if unsure of exact names, do a no-filter load first and call list_solutions to discover them. If the same `path` is already loaded, providing a new filter disposes the previous workspace (replace semantics). If the solution is already loaded with no filter, it simply activates it (~instant). New solutions take ~3 seconds to load and compile. For very large solutions (hundreds of projects) that take minutes to open, pass `background: true` to return a taskId immediately instead of blocking; poll it with get_task_status until it succeeds (its result carries the loaded/skipped counts). The new solution only becomes active once the background load finishes, so other tools keep working against the current solution meanwhile.

Return ilasm-style IL for a single method in a referenced closed-source assembly. Input must be a fully-qualified method name with parameter types.

Force a full reload of the analyzed solution — re-opens the .sln, recompiles all projects, and rebuilds all indexes. Use after changing Directory.Build.props, adding/removing NuGet packages, or when diagnostics seem stale.

Safely rename a type or member across the entire solution (Roslyn Renamer). Cascades to references, constructors, overrides, nameof, and XML doc crefs. Defaults to preview mode (returns edits without writing files); set preview=false to apply. New compiler errors the rename would introduce are reported as Conflicts, and apply mode refuses to write them unless force=true. Locals/parameters and file renames are not supported.

Map a pasted .NET stack trace to file/line/symbol against the loaded solution, undoing compiler name mangling: async/iterator state machines (`<M>d__N.MoveNext`), lambdas (`<>c` / `<>c__DisplayClass`), local functions (`g__Name|`), generic arity. Handles Exception.ToString() output, log-prefixed lines, inner-exception chains, and Ben.Demystifier-style traces. Frames without 'in file:line' get the declaration site; frames with it keep the exact location. External frames resolve with origin=metadata. Items are in original trace order.

Remove a previously trusted solution path or trusted root. Removes both session and persistent entries.

Search for types, methods, properties, and fields by name (case-insensitive substring match). Returns an envelope with items sorted by match quality (exact → prefix → substring), totalCount, truncated, limit (default 200), and a byKind summary.

Switch the active solution. All subsequent tool calls will operate on the selected solution. Use a partial, case-insensitive name (e.g. 'MyProject' matches 'C:/code/MyProject/MyProject.sln'). Returns the full path of the newly active solution.

Queue a long-running tool to run in the background. Returns a taskId; poll with get_task_status. Allowed tools: rebuild_solution.

Mark a solution path (or directory root) as trusted for analyzer execution. Required before get_diagnostics will load Roslyn analyzer DLLs from the solution. Always confirm with the user before calling this tool — analyzer DLLs run as in-process code.

Unload a previously loaded solution to free memory. Use a partial, case-insensitive name (e.g. 'DcpCore' matches the full path). If the unloaded solution was active, another loaded solution becomes active. Use this when you're done analyzing a codebase and want to reclaim memory.