Add comprehensive JSDoc documentation to src/api.d.ts

[Copilot]

Overview

This PR adds comprehensive JSDoc documentation to src/api.d.ts, the stable public API for the Jupyter extension. The enhancements significantly improve the developer experience for third-party extension authors who integrate with Jupyter functionality in VS Code.

Changes

📝 Documentation Enhancements (868 lines added)

1. File-Level Documentation

Added a detailed @fileoverview that explains:

• The API's purpose and structure
• Two main API areas: Jupyter Server Collections and Kernels API
• Design principles (versioning, activation timing, cancellation support)
• Practical example of accessing the API from other extensions

/**
 * @fileoverview Public API for the Jupyter extension for VS Code.
 * 
 * This file defines the stable public API that third-party extensions can use to interact
 * with Jupyter functionality in VS Code...
 */

2. Enhanced Interface Documentation

Jupyter Server Collections API:

• JupyterServerConnectionInformation - Detailed authentication options (token-based vs header-based) with OAuth and API key examples
• JupyterServer - Explained eager vs lazy connection info patterns with use cases
• JupyterServerProvider - Comprehensive documentation of lifecycle, timing, performance, and caching behavior
• JupyterServerCommand - Detailed auto-selection behavior with practical examples
• JupyterServerCommandProvider - Thorough explanation of return value semantics (undefined vs CancellationError)
• JupyterServerCollection - Complete lifecycle management and disposal patterns

Kernels API:

• KernelStatus - Documented status lifecycle and state transitions
• Kernel - Explained execution characteristics, limitations, and status monitoring patterns
• Output/OutputItem - Detailed mime types, special formats, and data encoding information
• Kernels - Usage patterns, access limitations, and practical examples

3. Code Examples (15+)

Added practical, working examples throughout:

• Creating server collections with custom authentication
• OAuth bearer token and API key authentication patterns
• Command handling with back button behavior
• Kernel code execution with output streaming
• Querying variable values programmatically
• Error handling and cancellation patterns
• Event subscription patterns

Example of the enhanced documentation:

/**
 * Executes code in the kernel without affecting the execution count & execution history.
 *
 * @param code - The code to be executed in the kernel.
 * @param token - Cancellation token to abort the execution.
 * @returns An async iterable of outputs that yields results as they are produced.
 *
 * @remarks
 * **Important characteristics:**
 * - Does NOT increment the kernel's execution counter
 * - Does NOT add to kernel's execution history
 * - Runs in the same kernel session as notebook cells
 * - Can access and modify variables from notebook cells
 *
 * @example
 * ```typescript
 * const kernel = await jupyterApi.kernels.getKernel(notebookUri);
 * if (kernel && kernel.status === 'idle') {
 *     for await (const output of kernel.executeCode('print("Hello")', token)) {
 *         // Process outputs...
 *     }
 * }
 * ```
 */
executeCode(code: string, token: CancellationToken): AsyncIterable<Output>;

4. Documentation Quality Standards

• Consistent JSDoc formatting across all interfaces
• Comprehensive @param, @returns, @remarks, and @example tags
• Detailed edge case documentation
• Error handling patterns clearly explained
• Platform-specific considerations noted
• Cross-references between related types using {@link}

Impact

This documentation enhancement provides:

• Discoverability: IntelliSense shows comprehensive documentation
• Clarity: Clear explanations of complex behaviors (lazy loading, error handling, cancellation)
• Examples: Practical code that developers can copy and adapt
• Best Practices: Guidance on timing, performance, and proper usage patterns

Testing

• ✅ TypeScript compilation successful (npm run compile-tsc)
• ✅ ESLint checks passed (npm run lint)
• ✅ Prettier formatting applied (npm run format-fix)
• ✅ Code review completed with no issues
• ✅ No security vulnerabilities detected

Backward Compatibility

All changes are non-breaking and purely documentation-focused. No functional code changes were made.

Statistics

• Original: 244 lines → Enhanced: 1,048 lines (4.3x increase)
• Documentation added: 868 lines
• Interfaces fully documented: 11
• Code examples added: 15+

Original prompt

add comments to the file src/api.d.ts

[Chronological Review: The conversation began with a user request to explain the contents of the `src/api.d.ts` file. Following that, the user requested to add comments to the same file. The next command indicated a need to proceed with changes, highlighting that uncommitted changes were detected in the repository.]

[Intent Mapping:

1. "explain the contents of src/api.d.ts" - The user seeks an understanding of the file's purpose and structure.
2. "/delegate add comments to the file src/api.d.ts" - The user intends to enhance the file with comments for clarity or documentation.
3. "Proceed: 'Uncommitted changes detected'" - The user is indicating readiness to move forward with changes despite uncommitted modifications.]

[Technical Inventory:

• Repository: vscode-jupyter
• Current Branch: main
• Default Branch: main
• File of Interest: src/api.d.ts]

[Code Archaeology:

• File: src/api.d.ts
• Purpose: To define the API structure and types used within the project.
• Recent Changes: User requested comments to be added, indicating a need for better documentation.]

[Progress Assessment:

• Completed Tasks: User has made requests regarding the src/api.d.ts file.
• Partially Complete Work: Adding comments to the file is pending.
• Validated Outcomes: No specific outcomes have been confirmed yet as the requests are still in progress.]

[Context Validation: All critical information for continuation is captured, including the user's requests and the state of the repository.]

[Recent Commands Analysis:

• Last Agent Commands:
  1. "explain the contents of src/api.d.ts"
  2. "/delegate add comments to the file src/api.d.ts"
  3. "Proceed: 'Uncommitted changes detected'"
• Tool Results Summary: The commands indicate a focus on understanding and documenting the src/api.d.ts file. The mention of uncommitted changes suggests that there are modifications that need to be addressed before proceeding.
• Pre-Summary State: The agent was actively working on adding comments to the src/api.d.ts file when the token budget was exceeded.
• Operation Context: These commands were executed to enhance the documentation of the API file and to ensure that any changes are properly committed.]

1. Conversation Overview: - Primary Objectives: 1. "explain the contents of src/api.d.ts" - Understanding the file's purpose. 2. "/delegate add comments to the file src/api.d.ts" - Adding documentation to the file. 3. "Proceed: 'Uncommitted changes detected'" - Moving forward with changes. - Session Context: The conversation has focused on the `src/api.d.ts` file, with requests for explanation and documentation. - User Intent Evolution: The user started with a request for explanation, then moved to enhancing the file with comments, indicating a desire for clarity and documentation.

2. Technical Foundation:

• Repository: vscode-jupyter
• Current Branch: main
• Default Branch: main
• File of Interest: src/api.d.ts

3. Codebase Status:

• File Name: src/api.d.ts
• Purpose: Defines the API structure and types used within the project.
• Current State: User has requested comments to be added, indicating a need for better documentation.
• Key Code Segments: Not specified yet, as the user is seeking an explanation.
• Dependencies: Relates to the overall API structure of the project.

4. Problem Resolution:

• Issues Encountered: Uncommitted changes detected in the repository.
• Solutions Implemented: None yet, as the user is still in the process of adding comments.
• Debugging Context: No ongoing troubleshooting efforts mentioned.
• Lessons Learned: The importance of documentation is highlighted by the user's request for comments.

5. Progress Tracking:

• Completed Tasks: User has made requests regarding the src/api.d.ts file.
• Partially Complete Work: Adding comments to the file is pending.
• Validated Outcomes: No specific outcomes confirmed yet.

6. Active Work State:

• Current Focus: Adding comments to the src/api.d.ts file.
• Recent Context: User has requested an explanation of the file and to add comments.
• Working Code: Not specified yet, as the user is seeking an explanation.
• Immediate Context: The user is addressing uncommitted changes in the repository.

7. Recent Operations:

• Last Agent Commands:
  1. "explain the contents of src/api.d.ts"
  2. "/delegate add comments to the file src/api.d.ts"
  3. "Proceed: 'Uncommitted changes detected'"
• Tool Results Summary: The commands indicate a focus on understanding and documenting the src/api.d.ts file.
• Pre-Summary State: The agent was actively working on adding comments to the src/api.d.ts file when the token budget was exceeded.
• Operation Context: These commands were executed to enhance the documentation of the API file and to ensure that any changes are properly committed.

8. Continuation Plan:

• [Pending Task 1]: Add comments to the src/api.d.ts file.
• [Pending Task 2]: Review and commi...

Created from VS Code via the GitHub Pull Request extension.

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.