Path lexical join

path-lexical-join · version 1.0.0 · File paths (lexical) · free, no key needed

Join an array of path segments lexically, resolving absolute reset boundaries and normalizing separators.

Use when you need to: path join · join path segments · concatenate path parts.

Supported

• path join
• join path segments
• concatenate path parts

Not supported

• stat file
• resolve symlinks
• filesystem access

Behavior

• Join segments left-to-right. If a segment is absolute (starts with /, , or drive:) it resets the base. Empty segments are treated as "." and skipped. The final joined path is lexically normalized.

Input

• segments (array of string, required): min items 1; max items 64; each max length 4096
• format (one of "posix", "windows", "auto", optional)

Output

• joined (string, required)
• format (string, required)
• is_absolute (boolean, required)

Limits

• max segments: 64
• max segment bytes: 4096

Example

Request input:

{
  "segments": [
    "/usr/local",
    "bin",
    "node"
  ]
}

Response:

{
  "result": {
    "joined": "/usr/local/bin/node",
    "format": "posix",
    "is_absolute": true
  }
}

How to call it

MCP

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

{
  "id": "path-lexical-join",
  "version": "1.0.0",
  "input": {
    "segments": [
      "/usr/local",
      "bin",
      "node"
    ]
  }
}

HTTP (no key)

curl -X POST https://computefirst.net/v1/tools/path-lexical-join/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"segments":["/usr/local","bin","node"]}'

The machine-readable contract is at /v1/tools/path-lexical-join/versions/1.0.0.

CLI

node cli.mjs run path-lexical-join 1.0.0 --input input.json --base-url https://computefirst.net

Get the client at /clients/cli/.

Related tools

• Path lexical normalize: Normalize a path lexically: collapse redundant separators, resolve "." and ".." segments.
• Path lexical common ancestor: Compute the deepest common ancestor directory of a set of paths.
• Path lexical contains: Check whether a child path is lexically inside a parent directory.
• Path lexical parse: Decompose a file path into its lexical components without accessing the filesystem.
• Path lexical relative: Compute the lexical relative path from one path to another without filesystem access.
• Path lexical sanitize: Sanitize an untrusted path to produce a safe relative path, stripping roots, drive letters, traversal segments, and illegal characters.