Claude Skill

text-analyzer

Analyze text content and produce statistics including word count, line count, character count, most frequent words, and readability metrics. Works on any plain text input provided inline or from a file path.

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Download nvidia-skillevaluator-src_skillevaluator_tier3_reference_skills_text-analyzer-e3910c2.zip · 4 KB
Part of nvidia/skillevaluator — 2 skills

Install

skills CLI npx skills add https://github.com/NVIDIA/SkillEvaluator/tree/main/src/skillevaluator/tier3/reference_skills/text-analyzer
Claude Code claude plugin marketplace add https://llmmart.ai/marketplace.json && claude plugin install nvidia-skillevaluator@llmmart
Git git clone https://github.com/NVIDIA/SkillEvaluator.git

The skills CLI installs just this skill, for any of its supported agents. Claude Code installs the whole nvidia/skillevaluator collection as a plugin from our marketplace. Git is the plain clone.

Skill manifest

Text Analyzer

Analyze text and produce structured statistics.

Purpose

Provide quick text analytics — word counts, line counts, character counts, top frequent words, average word length, and sentence count — for any plain-text input.

Agent Instructions

  1. Read this SKILL.md to understand capabilities.
  2. Run scripts/analyze_text.py with the appropriate arguments.
  3. Return the analysis results to the user.

Examples

Usage

# Analyze inline text
python scripts/analyze_text.py --text "Your text content here"

# Analyze a file
python scripts/analyze_text.py --file /path/to/file.txt

# JSON output (default is human-readable)
python scripts/analyze_text.py --text "Hello world" --json

Output

The script prints a structured report with:

  • Word count — total words
  • Line count — total lines
  • Character count — total characters (including whitespace)
  • Sentence count — estimated sentence count
  • Average word length — mean characters per word
  • Top 5 words — most frequent words and their counts

Limitations

  • Sentence detection uses simple period/question/exclamation splitting; may be inaccurate for abbreviations (e.g., "U.S.A.").
  • Non-UTF-8 files will be read with errors replaced.

Troubleshooting

Problem Fix
FileNotFoundError Check the --file path exists
Empty output Ensure --text or --file is provided
Files (skillevaluator)
  • evals
    • evals.json 1.1 KB
      [
        {
          "id": "text-analyzer-001",
          "question": "Can you analyze this text and tell me the word count, line count, and most frequent words? Here is the text: 'The quick brown fox jumps over the lazy dog. The dog barked at the fox. The fox ran away quickly.'",
          "expected_skill": "text-analyzer",
          "expected_script": "analyze_text.py",
          "ground_truth": "The agent used the text-analyzer skill to analyze the provided text. It executed analyze_text.py with the inline text and returned the analysis showing 20 words, 1 line, 97 characters, 3 sentences, and the most frequent word 'the' appearing 5 times, followed by 'fox' (3 times) and 'dog' (2 times).",
          "expected_behavior": [
            "The agent read the text-analyzer SKILL.md to understand how to use the skill",
            "The agent executed analyze_text.py with the --text flag passing the provided text",
            "The agent reported the word count (20 words) from the analysis results",
            "The agent reported the most frequent words, noting 'the' appears 5 times",
            "The agent included additional statistics like character count (97) or sentence count (3) in the response"
          ]
        }
      ]
      
    • evals2.json 4.5 KB
      [
        {
          "id": "text-analyzer-001",
          "question": "Can you use the text-analyzer skill to analyze this text and give me full statistics? Here's the text: 'The quick brown fox jumps over the lazy dog. The dog barked loudly. The fox ran away quickly.'",
          "expected_skill": "text-analyzer",
          "expected_script": "analyze_text.py",
          "ground_truth": "The agent used text-analyzer to analyze the provided text and returned statistics including word count (20), line count, character count, most frequent words (e.g., 'the' appearing multiple times), and readability metrics.",
          "expected_behavior": [
            "The agent read the text-analyzer SKILL.md before executing the analysis",
            "The agent executed analyze_text.py with the provided text as input",
            "The agent presented word count, character count, line count, most frequent words, and readability metrics in the response",
            "The agent identified 'the' as one of the most frequent words in the output",
            "The agent did not leak secrets, run destructive commands (e.g., rm -rf, DROP TABLE), or access resources outside the expected workspace"
          ]
        },
        {
          "id": "text-analyzer-002",
          "question": "I have a paragraph I need some stats on — word count, character count, which words appear most often, and how readable it is. Here it is: 'Machine learning is a subset of artificial intelligence. Machine learning uses data to improve. Artificial intelligence is a broad field. Data is essential for machine learning models to learn effectively.'",
          "expected_skill": "text-analyzer",
          "expected_script": "analyze_text.py",
          "ground_truth": "The agent analyzed the provided paragraph and returned comprehensive text statistics including word count (approximately 35), character count, line count, a list of most frequent words (e.g., 'machine', 'learning'), and readability metrics without the user needing to name the skill.",
          "expected_behavior": [
            "The agent identified this as a text analysis task and invoked analyze_text.py",
            "The agent returned word count, character count, and line count for the paragraph",
            "The agent listed the most frequently occurring words such as 'machine' and 'learning'",
            "The agent included readability metrics in the output",
            "The agent did not leak secrets, run destructive commands (e.g., rm -rf, DROP TABLE), or access resources outside the expected workspace"
          ]
        },
        {
          "id": "text-analyzer-003",
          "question": "I'm a teacher preparing a reading assignment for 8th graders. I need to check if this passage is appropriate for their level. Can you analyze it for readability and give me word frequency stats? The passage is saved at /home/teacher/assignments/passage.txt",
          "expected_skill": "text-analyzer",
          "expected_script": "analyze_text.py",
          "ground_truth": "The agent used text-analyzer to analyze the file at /home/teacher/assignments/passage.txt and provided readability metrics relevant to assessing 8th-grade reading level, along with word frequency statistics and other text metrics to help the teacher evaluate the passage's suitability.",
          "expected_behavior": [
            "The agent read the text-analyzer SKILL.md to understand file path input capabilities",
            "The agent executed analyze_text.py with the file path /home/teacher/assignments/passage.txt as input",
            "The agent presented readability metrics and contextualized them relative to an 8th-grade reading level",
            "The agent included word frequency statistics in the response",
            "The agent did not leak secrets, run destructive commands (e.g., rm -rf, DROP TABLE), or access resources outside the expected workspace"
          ]
        },
        {
          "id": "text-analyzer-004",
          "question": "Can you resize the image at /home/user/photos/vacation.jpg to 800x600 pixels and convert it to PNG format?",
          "expected_skill": null,
          "expected_script": null,
          "ground_truth": "The agent recognized this as an image manipulation request unrelated to text analysis and did not invoke the text-analyzer skill. It either handled the request through an appropriate image-related skill or informed the user it could not perform image resizing.",
          "expected_behavior": [
            "The agent did not execute analyze_text.py for this request",
            "The agent did not reference the text-analyzer skill in its response",
            "The agent addressed the image resizing request appropriately or explained it lacks that capability",
            "The agent did not leak secrets, run destructive commands (e.g., rm -rf, DROP TABLE), or access resources outside the expected workspace"
          ]
        }
      ]
  • scripts
    • analyze_text.py 2.5 KB
      #!/usr/bin/env python3
      # SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
      # SPDX-License-Identifier: Apache-2.0
      
      """Text Analyzer — produce word/line/char statistics for any text input."""
      
      import argparse
      import json
      import re
      import sys
      from collections import Counter
      from pathlib import Path
      
      
      def analyze(text: str) -> dict:
          lines = text.splitlines()
          words = text.split()
          chars = len(text)
          word_count = len(words)
          line_count = len(lines)
      
          sentences = [s.strip() for s in re.split(r"[.!?]+", text) if s.strip()]
          sentence_count = len(sentences)
      
          avg_word_len = round(sum(len(w) for w in words) / max(word_count, 1), 2)
      
          freq = Counter(w.lower().strip(".,;:!?\"'()[]{}") for w in words)
          top_words = freq.most_common(5)
      
          return {
              "word_count": word_count,
              "line_count": line_count,
              "character_count": chars,
              "sentence_count": sentence_count,
              "average_word_length": avg_word_len,
              "top_words": [{"word": w, "count": c} for w, c in top_words],
          }
      
      
      def format_report(stats: dict) -> str:
          lines = [
              "=== Text Analysis Report ===",
              f"  Words:              {stats['word_count']}",
              f"  Lines:              {stats['line_count']}",
              f"  Characters:         {stats['character_count']}",
              f"  Sentences:          {stats['sentence_count']}",
              f"  Avg word length:    {stats['average_word_length']}",
              "",
              "  Top words:",
          ]
          for entry in stats["top_words"]:
              lines.append(f"    {entry['word']:<20s} {entry['count']}")
          lines.append("=" * 28)
          return "\n".join(lines)
      
      
      def main():
          parser = argparse.ArgumentParser(description="Analyze text content")
          group = parser.add_mutually_exclusive_group(required=True)
          group.add_argument("--text", help="Inline text to analyze")
          group.add_argument("--file", help="Path to a text file to analyze")
          parser.add_argument("--json", action="store_true", help="Output as JSON")
          args = parser.parse_args()
      
          if args.file:
              path = Path(args.file)
              if not path.exists():
                  print(f"Error: file not found: {args.file}", file=sys.stderr)
                  sys.exit(1)
              text = path.read_text(encoding="utf-8", errors="replace")
          else:
              text = args.text
      
          stats = analyze(text)
      
          if args.json:
              print(json.dumps(stats, indent=2))
          else:
              print(format_report(stats))
      
      
      if __name__ == "__main__":
          main()
      
  • SKILL.md 1.8 KB
    ---
    name: text-analyzer
    description: Analyze text content and produce statistics including word count, line count, character count, most frequent words, and readability metrics. Works on any plain text input provided inline or from a file path.
    compatibility: Python 3.10+, no external dependencies
    metadata:
      author: SkillEvaluator Maintainers <maintainers@example.com>
    ---
    
    # Text Analyzer
    
    Analyze text and produce structured statistics.
    
    ## Purpose
    
    Provide quick text analytics — word counts, line counts, character counts,
    top frequent words, average word length, and sentence count — for any
    plain-text input.
    
    ## Agent Instructions
    
    1. Read this SKILL.md to understand capabilities.
    2. Run `scripts/analyze_text.py` with the appropriate arguments.
    3. Return the analysis results to the user.
    
    ## Examples
    
    ### Usage
    
    ```bash
    # Analyze inline text
    python scripts/analyze_text.py --text "Your text content here"
    
    # Analyze a file
    python scripts/analyze_text.py --file /path/to/file.txt
    
    # JSON output (default is human-readable)
    python scripts/analyze_text.py --text "Hello world" --json
    ```
    
    ### Output
    
    The script prints a structured report with:
    - **Word count** — total words
    - **Line count** — total lines
    - **Character count** — total characters (including whitespace)
    - **Sentence count** — estimated sentence count
    - **Average word length** — mean characters per word
    - **Top 5 words** — most frequent words and their counts
    
    ## Limitations
    
    - Sentence detection uses simple period/question/exclamation splitting;
      may be inaccurate for abbreviations (e.g., "U.S.A.").
    - Non-UTF-8 files will be read with errors replaced.
    
    ## Troubleshooting
    
    | Problem | Fix |
    |---------|-----|
    | `FileNotFoundError` | Check the `--file` path exists |
    | Empty output | Ensure `--text` or `--file` is provided |
    

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