Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add terrylica/cc-skills --skill code-clone-assistantgit clone --depth 1 https://github.com/terrylica/cc-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/terrylica/cc-skills/code-clone-assistant)<a href="https://agentmods.dev/skills/terrylica/cc-skills/code-clone-assistant"><img src="https://agentmods.dev/badge/skills/terrylica/cc-skills/code-clone-assistant.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00033 | $0.01691 |
| Opus 5 | $0.00016 | $0.00846 |
| Sonnet 5 | $0.00007 | $0.00338 |
| Haiku 4.5 | $0.00003 | $0.00169 |
Grade A, and why
code-clone-assistant scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 169 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Code Clone Assistant
Detect code clones and guide refactoring using PMD CPD (exact duplicates) + Semgrep (patterns).
Self-Evolving Skill: This skill improves through use. If instructions are wrong, parameters drifted, or a workaround was needed — fix this file immediately, don't defer. Only update for real, reproducible issues.
Tools
- PMD CPD v7.17.0+: Exact duplicate detection
- Semgrep v1.140.0+: Pattern-based detection
Tested: October 2025 - 30 violations detected across 3 sample files Coverage: ~3x more violations than using either tool alone
When to Use This Skill
Use this skill when:
- Finding duplicate code in a codebase
- Detecting DRY violations
- Refactoring similar code patterns
- Identifying copy-paste code
Why Two Tools?
PMD CPD and Semgrep detect different clone types:
| Aspect | PMD CPD | Semgrep |
|---|---|---|
| Detects | Exact copy-paste duplicates | Similar patterns with variations |
| Scope | Across files ✅ | Within/across files (Pro only) |
| Matching | Token-based (ignores formatting) | Pattern-based (AST matching) |
| Rules | ❌ No custom rules | ✅ Custom rules |
Result: Using both finds ~3x more DRY violations.
Clone Types
| Type | Description | PMD CPD | Semgrep |
|---|---|---|---|
| Type-1 | Exact copies | ✅ Default | ✅ |
| Type-2 | Renamed identifiers | ✅ --ignore-* |
✅ |
| Type-3 | Near-miss with variations | ⚠️ Partial | ✅ Patterns |
| Type-4 | Semantic clones (same behavior) | ❌ | ❌ |
Quick Start Workflow
# Step 1: Detect exact duplicates (PMD CPD)
pmd cpd -d . -l python --minimum-tokens 20 -f markdown > pmd-results.md
# Step 2: Detect pattern violations (Semgrep)
semgrep --config=clone-rules.yaml --sarif --quiet > semgrep-results.sarif
# Step 3: Analyze combined results (Claude Code)
# Parse both outputs, prioritize by severity
# Step 4: Refactor (Claude Code with user approval)
# Extract shared functions, consolidate patterns, verify tests
What ships with it
5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 169 lines · 33 tokens per session scan A 56b18a24393a
code-clone-assistant is a skill published in the GitHub repository terrylica/cc-skills (62 stars, last pushed yesterday), licensed MIT. It adds 33 tokens to every session and 1,691 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-05.
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