find-duplicates

find-duplicates is a skill for Claude Code from obsfx/trekker-claude-code. It costs 21 tokens per session (399 once invoked), scanned A, a copy of find-duplicates, MIT.

A duplicate-checking task workflow that searches existing tasks before a new task is created. It uses keyword search and requires reviewing possible matches.

In plain words
What is it for?
Use it before creating any task, including when reporting an issue, grooming a backlog, or starting a feature.
Why use it?
It prevents duplicate tasks and helps connect new reports to related work already tracked. This avoids splitting one issue across several backlog entries.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: names the TodoWrite tool.

Part of the trekker plugin — 7 skills, 13 commands, 1 agent, 4 hooks shipped together

Good fit Use it before creating any task, including when reporting an issue, grooming a backlog, or starting a feature.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/obsfx/trekker-claude-code/find-duplicates
Install

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.

Any agent
npx skills add obsfx/trekker-claude-code --skill find-duplicates
Clone the repo
git clone --depth 1 https://github.com/obsfx/trekker-claude-code

Made for: Claude Code.

Or install trekker, the plugin that ships this one along with the rest of its 7 skills, 13 commands, 1 agent, 4 hooks.

Wrote 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.

agentmods badge for find-duplicates

README.md
[![agentmods](https://agentmods.dev/badge/skills/obsfx/trekker-claude-code/find-duplicates/github.svg)](https://agentmods.dev/skills/obsfx/trekker-claude-code/find-duplicates)
Your own site
<a href="https://agentmods.dev/skills/obsfx/trekker-claude-code/find-duplicates"><img src="https://agentmods.dev/badge/skills/obsfx/trekker-claude-code/find-duplicates/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for find-duplicates

Your own site · 80×15
<a href="https://agentmods.dev/skills/obsfx/trekker-claude-code/find-duplicates"><img src="https://agentmods.dev/badge/skills/obsfx/trekker-claude-code/find-duplicates.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 21 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 399 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 100% copy Near-identical to another mod in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00021 $0.00399
Opus 5.5 $0.00008 $0.00160
Sonnet 5.5 $0.00004 $0.00080
Haiku 4.5 $0.00002 $0.00040

Measured today against content hash 8ce762abc700, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

find-duplicates 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 today.

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.

Origin

This is a copy

100% identical to find-duplicates — 6 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/find-duplicates/SKILL.md · 66 lines

What it actually says

CRITICAL: Search Before Creating ANY Task

You MUST search before creating any task.

trekker search "<task description you're about to create>"

When to Use (MANDATORY)

  • BEFORE creating ANY new task - non-negotiable
  • User reports issue - check if already tracked
  • Grooming backlog - find consolidation opportunities
  • Starting new feature - find related past work

IMPORTANT: FTS5 Search Tips

Search uses FTS5 (not semantic). Use single keywords for best recall:

  • Multi-word queries require ALL words present (AND logic = fewer results)
  • Search multiple times with different keywords

Commands

# Search with single keywords - try the most distinctive word
trekker search "authentication"
trekker search "login"

# Search specific type
trekker search "timeout" --type task

# Search by status
trekker search "performance" --status todo

MANDATORY Workflow

1. SEARCH: trekker search "<single keyword>" (try 2-3 keywords separately)
2. REVIEW results
3. DECIDE:
   - Found exact match → DO NOT create, update existing task
   - Found related work → Review carefully, may need to link
   - No results → Safe to create new
4. CREATE in Trekker FIRST (if no duplicate)
5. MIRROR to TodoWrite after

Anti-Patterns (DO NOT)

  • Creating task without searching first
  • Ignoring search results
  • Creating in TodoWrite without checking Trekker first

Trekker is Primary

Always:

  1. Check Trekker for duplicates FIRST
  2. Create in Trekker FIRST
  3. Then mirror to TodoWrite
Changes

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.

  1. today First seen · 66 lines · 21 tokens per session scan A 8ce762abc700

Subscribe to this mod's changes

find-duplicates is a skill published in the GitHub repository obsfx/trekker-claude-code (4 stars, last pushed yesterday), licensed MIT. It adds 21 tokens to every session and 399 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to find-duplicates, differing in 6 lines, and is treated as a copy.

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