Text Diff

Overview

Computes a structured diff between two text inputs using Myers algorithm. Supports line, word, and character granularity. Returns hunks, operations, unified diff output, and summary statistics. Accepts file input via file_ref — no need to extract file content first.

LLMs cannot reliably compute precise line- or word-level diffs. We use Myers' algorithm to give you exact, structured change information every time.

When to use it

Scope

Non-goals

• Does not apply patches or merge changes
• Does not perform three-way merge or conflict resolution
• Does not compare binary content

Properties

Capabilities

Cost & billing

Flat rate per invocation

File handling

File limits

Constraints this skill applies to your input and generated files. The “Limited by” column shows the static source of each cap; none of these can be raised by upgrading your plan.

How we handle your data

Input schema

Output schema

API contract

curl -sS -X POST "$BASE/v1/execute" -H "Authorization: Bearer $KEY" -H 'Content-Type: application/json' -d '{"skillKey":"text.diff_text","input":{"oldText":"hello world","newText":"hello there world"}}'

import { Squillify } from "@squillify/sdk";

const sq = new Squillify({ apiKey: process.env.SQUILLIFY_API_KEY });

const { output } = await sq.execute("text.diff_text", {"oldText":"line1\nline2\nline3","newText":"line1\nline2 modified\nline3\nline4"});

Errors

Other limits

Limitations

• Does not apply patches or merge changes
• Does not perform three-way merge or conflict resolution
• Does not compare binary content
• Applying or merging diffs programmatically
• Binary file comparison
• Three-way merge or conflict resolution

How to call

POST /v1/execute (requires authentication)

{
  "skillKey": "text.diff_text",
  "input": {
    "oldText": "line1\nline2\nline3",
    "newText": "line1\nline2 modified\nline3\nline4"
  }
}

Examples

{
  "oldText": "line1\nline2\nline3",
  "newText": "line1\nline2 modified\nline3\nline4"
}

{
  "stats": {
    "changed": 1,
    "added": 1,
    "removed": 0,
    "unchanged": 2
  },
  "granularity": "line",
  "unifiedDiff": "--- old\n+++ new\n@@ -1,3 +1,4 @@\n line1\n-line2\n+line2 modified\n line3\n+line4",
  "identical": false,
  "hunks": [
    {
      "sourcePosition": 2,
      "sourceLines": [
        "line2"
      ],
      "type": "change",
      "targetLines": [
        "line2 modified"
      ],
      "targetPosition": 2
    },
    {
      "sourcePosition": 4,
      "sourceLines": [],
      "type": "insert",
      "targetLines": [
        "line4"
      ],
      "targetPosition": 4
    }
  ]
}

{
  "granularity": "word",
  "newText": "hello there world",
  "oldText": "hello world"
}

{
  "identical": false,
  "granularity": "word",
  "stats": {
    "changed": 0,
    "added": 2,
    "removed": 0,
    "unchanged": 3
  },
  "hunks": [
    {
      "source": [],
      "type": "insert",
      "target": [
        "there",
        " "
      ]
    }
  ]
}

Recommended use cases

• Compare document or configuration versions
• Track prompt or template evolution over time
• Audit generated content for unexpected regressions

Avoid for

• Applying or merging diffs programmatically
• Binary file comparison
• Three-way merge or conflict resolution

Related skills

Composable with

Safety & privacy

• Runs without calling any external service.
• Your payloads are never stored permanently.
• Telemetry captures metadata only — never your payload contents.
• We never train models on your payloads.
• No human reviews your payloads.

Tags