Path set prefix strip

path-set-prefix-strip · version 1.0.0 · File paths (lexical) · free, no key needed

Strip a common directory prefix or base path from an array of paths lexically.

Use when you need to: strip path prefix · remove base directory · relativize paths.

Supported

• strip path prefix
• remove base directory
• relativize paths

Not supported

• stat file
• filesystem access

Behavior

• For each path, check if it starts with the prefix (lexically normalized, directory-boundary aware). Strip the prefix from matching paths, returning the relative subpath. not_matched: count of paths that did not start with prefix. Windows: case-insensitive comparison of normalized segments.

Input

• paths (array of string, required): min items 0; max items 10000; each min length 1; each max length 4096
• prefix (string, required): min length 1; max length 4096
• format (one of "posix", "windows", "auto", optional)
• skip_non_matching (boolean, optional)

Output

• stripped (array of string, required)
• not_matched (integer, required)
• format (string, required)

Limits

• max paths: 10000
• max path bytes: 4096

Example

Request input:

{
  "paths": [
    "/app/src/a.ts",
    "/app/src/b.ts",
    "/other/c.ts"
  ],
  "prefix": "/app/src"
}

Response:

{
  "result": {
    "stripped": [
      "a.ts",
      "b.ts",
      "/other/c.ts"
    ],
    "not_matched": 1,
    "format": "posix"
  }
}

How to call it

MCP

Connect https://computefirst.net/mcp (setup), then call execute with:

{
  "id": "path-set-prefix-strip",
  "version": "1.0.0",
  "input": {
    "paths": [
      "/app/src/a.ts",
      "/app/src/b.ts",
      "/other/c.ts"
    ],
    "prefix": "/app/src"
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/path-set-prefix-strip/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"paths":["/app/src/a.ts","/app/src/b.ts","/other/c.ts"],"prefix":"/app/src"}'

The machine-readable contract is at /v1/tools/path-set-prefix-strip/versions/1.0.0.

CLI

node cli.mjs run path-set-prefix-strip 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

Related tools

• Path set dedupe: Deduplicate an array of paths based on lexical equivalence while preserving first or last seen order.
• Path set hierarchy tree: Transform a flat array of file paths into a nested deterministic directory tree structure.
• Path set partition directory: Partition an array of file paths into buckets grouped by parent directory or directory at a specified depth.
• Path lexical common ancestor: Compute the deepest common ancestor directory of a set of paths.
• Path set classify: Classify an array of file paths by file extension, depth histogram, and path format.
• Path set difference: Compute the set difference (A \ B) of two path collections using lexical path equivalence.