copilot: remove unused code and orphaned dependencies by dmitrivMS · Pull Request #348381 · microsoft/vscode

Dmitriy Vasyura (dmitrivMS) · 2026-11-15T05:00:52Z

Remove unused helpers, types, constants, internal methods, and legacy notebook-generation prompts from the built-in Copilot Chat extension.
Remove internal production code referenced only by its own tests, including obsolete prompt rendering, indentation-tree utilities, an OpenAI simulation adapter, and diff-generation code, together with exclusive tests and fixtures.
Delete obsolete tests and unused mocks and test helpers.
Recursively prune orphaned telemetry and file-stat plumbing, replay timing infrastructure, folding bookkeeping, caches, state, dependencies, and configuration entries.
Remove obsolete language-server context statistics and prompt telemetry metadata while retaining recording operation lookup with focused regression coverage.
Remove orphaned parser query registrations and semantic-chunking code, unused TypeScript-context APIs, and obsolete session/worktree helpers.

Remove unreferenced internal helpers, types, legacy notebook prompts, and obsolete tool-extension registration support. Follow recursive dependencies to remove orphaned members, caches, and bookkeeping while preserving active registrations and public APIs. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Copilot

🟢 Approval recommended

No active review issues remain for the unused-code and dependency cleanup.

No open issues 🎉

What changed in this PR

This PR reduces maintenance overhead in the built-in Copilot extension by removing unused internal code and dependencies left behind by those removals. No user-facing behavior change is intended.

Changes:

Removes unused helpers, types, constants, and internal methods across platform services, prompts, completions, and chat sessions.
Removes legacy notebook-generation prompts, replay timing support, folding-parent bookkeeping, recent-document caching, and tool-extension registration.
Simplifies affected imports, constructors, and error handling while retaining query-registration side effects.

Paths below are relative to extensions/copilot/src/.

File	Description
`util/common/timeTravelScheduler.ts`	Removes unused scheduler and queue inspection methods.
`util/common/markdown.ts`	Removes inline-code extraction helper.
`util/common/diff.ts`	Removes unused sequence and change helpers.
`platform/workspaceRecorder/common/resolvedRecording/resolvedRecording.ts`	Removes operation and document lookup helpers.
`platform/workspaceRecorder/common/resolvedRecording/documentHistory.ts`	Removes operation-index bookkeeping and lookup.
`platform/workspaceChunkSearch/node/workspaceFileIndex.ts`	Removes fast content-version helper.
`platform/telemetry/common/telemetry.ts`	Removes redundant telemetry properties type.
`platform/parser/node/treeSitterQueries.ts`	Removes unused export while preserving query registration.
`platform/parser/node/parserService.ts`	Removes context type re-export.
`platform/parser/node/indentationStructure.ts`	Removes folding-parent computation and lookup machinery.
`platform/parser/node/chunkGroupTypes.ts`	Removes block-name tree interface.
`platform/notebook/vscode/notebookServiceImpl.ts`	Removes alternative-content scheme constant.
`platform/networking/common/openai.ts`	Removes chat-role enum and text extraction helper.
`platform/networking/common/fetch.ts`	Removes unused response-part types and guards.
`platform/networking/common/anthropic.ts`	Removes interleaved-thinking model helper.
`platform/languages/common/languageDiagnosticsService.ts`	Removes diagnostic severity helper.
`platform/inlineEdits/common/workspaceEditTracker/workspaceDocumentEditTracker.ts`	Removes recent-document cache and associated helpers.
`platform/inlineEdits/common/statelessNextEditProvider.ts`	Removes edit callback type.
`platform/inlineEdits/common/inlineEditLogContext.ts`	Removes unused test-data interface.
`platform/inlineEdits/common/dataTypes/textEditLengthHelper/length.ts`	Removes unused length comparison and conversion helpers.
`platform/inlineEdits/common/dataTypes/languageContext.ts`	Removes bulk diagnostic serialization helper.
`platform/github/common/githubService.ts`	Removes team identifier constant.
`platform/github/common/githubAPI.ts`	Removes unused response interfaces.
`platform/env/common/packagejson.ts`	Removes engine-version export.
`platform/embeddings/common/embeddingsIndex.ts`	Removes cache rebuilding method.
`platform/editSurvivalTracking/common/arcTracker.ts`	Removes debug helpers and retained edit field.
`platform/editing/common/offsetLineColumnConverter.ts`	Removes line-start lookup helper.
`platform/editing/common/abstractText.ts`	Removes offset-range conversion helper.
`platform/customInstructions/common/promptTypes.ts`	Removes prompt-file extension constant.
`platform/configuration/common/validator.ts`	Removes object-properties type alias.
`platform/authentication/common/copilotToken.ts`	Removes unused token and notification types.
`extension/xtab/common/lintErrors.ts`	Removes lint context interface.
`extension/typescriptContext/vscode-node/tsContextService.ts`	Removes runnable-result lookup method.
`extension/typescriptContext/vscode-node/ts7/tsContextService.ts`	Removes handling for deleted budget exception.
`extension/typescriptContext/vscode-node/ts7/contextProvider.ts`	Removes budget exception helpers and rejection tracking.
`extension/typescriptContext/vscode-node/ts7/baseContextProviders.ts`	Removes node predicates and related imports.
`extension/typescriptContext/serverPlugin/src/node/create.ts`	Removes handling for deleted budget exception.
`extension/typescriptContext/serverPlugin/src/common/utils.ts`	Removes most-recently-used cache implementation.
`extension/typescriptContext/serverPlugin/src/common/typescripts.ts`	Removes symbol helpers and stale import-state bookkeeping.
`extension/typescriptContext/serverPlugin/src/common/sourceFileContextProvider.ts`	Removes scope-symbol type.
`extension/typescriptContext/serverPlugin/src/common/contextProvider.ts`	Simplifies import-state construction and budget support.
`extension/tools/vscode-node/toolsService.ts`	Removes tool-extension instantiation and overrides.
`extension/tools/node/applyPatch/parser.ts`	Removes change assembly helper.
`extension/tools/node/applyPatch/parseApplyPatch.ts`	Removes legacy parser while retaining patch constants.
`extension/tools/common/virtualTools/virtualToolTypes.ts`	Removes summarizer error class.
`extension/tools/common/virtualTools/virtualToolsConstants.ts`	Removes unused grouping constants.
`extension/tools/common/toolsRegistry.ts`	Removes tool-extension registration and storage.
`extension/renameSuggestions/node/renameSuggestionsProvider.ts`	Removes prefix detection helper.
`extension/prompts/node/panel/newNotebook.tsx`	Removes legacy generation and improvement prompts.
`extension/prompts/node/panel/currentEditor.tsx`	Removes inactive notebook-cell rendering path and dependency.
`extension/prompts/node/inline/workingCopies.ts`	Removes unused edit projection and snapshot helpers.
`extension/prompts/node/inline/summarizedDocument/projectedText.ts`	Removes offset and edit projection helpers.
`extension/prompts/node/codeMapper/codeMapperService.ts`	Removes resource-edit type alias.
`extension/prompts/node/agent/promptRegistry.ts`	Removes prompt constructor alias.
`extension/prompts/node/agent/backgroundTodoAgent/backgroundTodoAgentProcessor.ts`	Removes unused policy input interface.
`extension/prompt/node/intents.ts`	Removes null intent implementation.
`extension/prompt/node/indentationGuesser.ts`	Removes indentation buffer interface.
`extension/prompt/node/feedbackReporter.ts`	Removes null reporter singleton.
`extension/prompt/node/editGeneration.ts`	Removes line-range type.
`extension/prompt/node/chatParticipantTelemetry.ts`	Removes telemetry lookup method.
`extension/prompt/common/conversation.ts`	Removes message accessor and conversation-state interface.
`extension/mcp/vscode-node/nuget.ts`	Removes unused server status and configuration types.
`extension/intents/node/searchIntent.ts`	Removes example prompt constant.
`extension/intents/node/newNotebookIntent.ts`	Removes legacy notebook cell-generation functions.
`extension/inlineEdits/vscode-node/utils/virtualTextDocumentProvider.ts`	Removes unused document convenience methods.
`extension/inlineEdits/vscode-node/utils/translations.ts`	Removes external text-edit conversion helper.
`extension/inlineEdits/vscode-node/features/diagnosticsBasedCompletions/diagnosticsCompletions.ts`	Removes diagnostic range and distance helpers.
`extension/inlineEdits/common/observableWorkspaceRecordingReplayer.ts`	Removes timed replay and simplifies synchronous stepping.
`extension/conversation/vscode-node/chatParticipants.ts`	Removes debug state and simplifies disposal return value.
`extension/context/node/resolvers/selectionContextHelpers.ts`	Removes filepath marker predicate.
`extension/context/node/resolvers/extensionApi.tsx`	Removes string-rendering helper.
`extension/configuration/vscode-node/configurationMigration.ts`	Removes unused configuration metadata declarations.
`extension/completions/common/config.ts`	Removes server-trimming helper.
`extension/completions-core/vscode-node/prompt/src/prompt.ts`	Removes prompt allocation aliases.
`extension/completions-core/vscode-node/prompt/src/indentation/description.ts`	Removes indentation-tree encoding helper.
`extension/completions-core/vscode-node/lib/src/suggestions/partialSuggestions.ts`	Removes copied partial-accept enum.
`extension/completions-core/vscode-node/lib/src/snippy/telemetryHandlers.ts`	Removes no-op telemetry reporter.
`extension/completions-core/vscode-node/lib/src/prompt/render/utils.ts`	Removes node-cost callback type.
`extension/completions-core/vscode-node/lib/src/prompt/render/renderNode.ts`	Removes snapshot helper and empty-node constant.
`extension/completions-core/vscode-node/lib/src/prompt/completionsPromptFactory/componentsCompletionsPromptFactory.tsx`	Removes unused concrete prompt factory.
`extension/completions-core/vscode-node/lib/src/prompt/asyncUtils.ts`	Removes event-to-promise helper.
`extension/completions-core/vscode-node/lib/src/openai/fetch.ts`	Removes speculation request interface.
`extension/completions-core/vscode-node/lib/src/networkingTypes.ts`	Removes request-header alias.
`extension/completions-core/vscode-node/lib/src/networking.ts`	Removes legacy fetcher abstraction.
`extension/completions-core/vscode-node/lib/src/language/languages.ts`	Removes language metadata type.
`extension/completions-core/vscode-node/lib/src/ghostText/ghostText.ts`	Removes multiline override class.
`extension/completions-core/vscode-node/lib/src/config.ts`	Removes editor filter type and import.
`extension/completions-core/vscode-node/extension/src/panelShared/baseSuggestionsPanel.ts`	Removes solution-reset method.
`extension/completions-core/vscode-node/extension/src/panelShared/basePanelTypes.ts`	Removes webview configuration interface.
`extension/completions-core/vscode-node/extension/src/copilotPanel/common.ts`	Removes navigation enum.
`extension/completions-core/vscode-node/extension/src/constants.ts`	Removes comparison-panel context constant.
`extension/chatSessions/vscode/chatSessionsUriHandler.ts`	Removes unused URI handler mapping.
`extension/chatSessions/vscode-node/pullArtifactResolver.ts`	Removes resolver options interface.
`extension/chatSessions/copilotcli/node/userInputHelpers.ts`	Removes request alias and SDK import.
`extension/chatSessions/copilotcli/node/copilotcliSessionService.ts`	Removes request alias and mutex inspection method.
`extension/chatSessions/common/chatSessionMetadataStore.ts`	Removes worktree session entry interface.
`extension/byok/common/byokProvider.ts`	Removes unused model registry, configuration, and key-update helpers.

_{Review effort: Balanced}

Copilot

🟡 Changes recommended

The deletions leave unused telemetry state and pass-through parameters, along with obsolete file-stat methods and dependencies, that still need removal.

2 open issues

_{Review effort: Max}

Remove unused internal helpers and production paths referenced only by their own tests. Delete obsolete rendering, indentation, adapter, and diff-generation code with its exclusive tests and fixtures, and prune orphaned state, types, and configuration entries. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Copilot

🟡 Changes recommended

The cleanup leaves unused prompt telemetry computation and orphaned telemetry declarations in place, while the discarded doc-comment query still registers at module load.

1 open issue

Remove obsolete prompt telemetry stats and fields · New

2 resolved since last review

_{Review effort: Max}

Remove unused language-server context statistics and the orphaned prompt telemetry marker and result field. Retain recording operation lookup with focused regression coverage. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Copilot

🔵 Needs a closer look

Unpublished findings about lingering query registrations and orphaned APIs require human assessment of the cleanup’s completeness.

No open issues 🎉

1 resolved since last review

Remove obsolete prompt telemetry stats and fields

_{Review effort: Max}

Prune unused parser/context paths, session APIs, and exclusive test helpers while retaining persisted metadata and compatibility-sensitive contracts. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Copilot

🔵 Needs a closer look

The review is incomplete because one or more reviewers received a runtime budget-stop instruction.

No open issues 🎉

_{Review effort: Max}

Escape every newline, tab, and backtick in inline-edit log entries. Add focused regression coverage for repeated whitespace and fenced backticks. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Copilot

🟢 Approval recommended

The review identifies no active issues requiring changes to this unused-code cleanup.

No open issues 🎉

_{Review effort: Balanced}

Copilot AI balanced review requested due to automatic review settings November 15, 2026 05:00

Dmitriy Vasyura (dmitrivMS) self-assigned this Nov 15, 2026

Copilot started reviewing on behalf of Dmitriy Vasyura (dmitrivMS) November 15, 2026 05:01

View session

Dmitriy Vasyura (dmitrivMS) added debt Code quality issues chat labels Nov 15, 2026