A
licenseB
qualityD
maintenanceThis MCP server provides unified diffs of two text inputs using Python's standard library difflib.
1
8
MIT
mcp-vsdiff
The mcp-vsdiff server exposes VS Code's advanced diff algorithm as a single MCP tool, compute_diff, for computing highly accurate diffs between two text strings.
Key capabilities:
Compare two strings to get a detailed unified diff with standard
@@-style hunks and 3 lines of contextDetect moved code blocks, annotating deletions with
{moved to block #N}and insertions with{moved from block #N}Control whitespace sensitivity via
ignoreTrimWhitespace(defaulttrue) — lines differing only in leading/trailing whitespace appear as unchanged contextSummary footer showing total insertions, deletions, and moved block counts
Metrics block (default
true) reportinghunkCount,changedLines,movedBlocks, andhitTimeoutVerbose metrics for a per-hunk breakdown
Paginate large diffs using
maxDiffLinesandskipDiffLinesMetrics-only mode via
metricsOnlyto assess the scale of changes without returning diff text
Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@mcp-vsdiffShow diff with move detection between original and modified text"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
mcp-vsdiff
An MCP server that exposes VS Code's advanced diff algorithm as a tool.
What it does
Provides a single MCP tool, compute_diff, that computes a highly accurate unified diff between two strings using the same algorithm VS Code uses internally. Features include:
Move detection — identifies blocks of code that were moved, not just deleted/inserted
Unified diff output — standard
@@-style hunks with 3 lines of contextMove annotations — deleted lines show
{moved to block #N}and inserted lines show{moved from block #N}Summary footer — total insertions, deletions, and moved blocks at the end
Related MCP server: Git Stuff Server
Usage
Install
npm installRun
npm startThe server communicates over stdio and is compatible with any MCP client.
Tool: compute_diff
Parameter | Type | Required | Description |
| string | ✅ | The original text |
| string | ✅ | The modified text |
| boolean | Ignore leading/trailing whitespace differences per line (default: | |
| boolean | Append a JSON metrics block to the response (default: | |
| boolean | Add per-hunk breakdown to the metrics block (default: | |
| boolean | Return only the metrics block, no diff text — useful for large files (default: | |
| number | Truncate the diff text if it exceeds this number of lines (default: | |
| number | Number of diff text lines to skip from the beginning. Combine with |
Metrics fields
Field | Description |
| Number of separate change regions (lower = easier to review) |
| Real insertions + real deletions, excluding moved lines |
| Lines added, excluding moved lines |
| Lines removed, excluding moved lines |
| Number of detected move operations |
| Total lines involved in moves |
| Whether the diff computation hit the 5 s time limit |
ignoreTrimWhitespacegotcha: with the defaulttrue, a line whose only change is indentation (e.g. code moved into a deeperifblock) will appear as unchanged context, making the diff look cleaner than a plaingit diffwould. Set tofalseif indentation changes need to be visible.
MCP config example
{
"mcpServers": {
"vsdiff": {
"command": "node",
"args": ["/path/to/mcp-diff/index.js"]
}
}
}Dependencies
@modelcontextprotocol/sdk— MCP server frameworkvscode-diff— VS Code's diff algorithm, extracted as a standalone package
Maintenance
–Maintainers
–Response time
–Release cycle
–Releases (12mo)
Commit activity
Resources
Unclaimed servers have limited discoverability.
Looking for Admin?
If you are the server author, to access and configure the admin panel.
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