dex

dex is a skill for Claude Code, Codex from markerikson/opencode-config-example. It costs 26 tokens per session (1,723 once invoked), scanned A, a copy of dex, MIT.

A guide to using the dex command-line tool to manage structured work tickets. A ticket records the task, its background and requirements, and the result, so work can be understood later.

In plain words
What is it for?
Use it to break work into subtasks, preserve context between sessions, record decisions, and coordinate implementation across multiple sessions.
Why use it?
It keeps decisions, context, and handoffs from being lost when work is complex or continues across sessions. It also explains when a simple one-off task does not need ticket tracking.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions Claude Code.

Good fit Use it to break work into subtasks, preserve context between sessions, record decisions, and coordinate implementation across multiple sessions.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/markerikson/opencode-config-example/dex
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 markerikson/opencode-config-example --skill dex
Clone the repo
git clone --depth 1 https://github.com/markerikson/opencode-config-example

Made for: Claude Code, Codex.

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 dex

README.md
[![agentmods](https://agentmods.dev/badge/skills/markerikson/opencode-config-example/dex/github.svg)](https://agentmods.dev/skills/markerikson/opencode-config-example/dex)
Your own site
<a href="https://agentmods.dev/skills/markerikson/opencode-config-example/dex"><img src="https://agentmods.dev/badge/skills/markerikson/opencode-config-example/dex/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 dex

Your own site · 80×15
<a href="https://agentmods.dev/skills/markerikson/opencode-config-example/dex"><img src="https://agentmods.dev/badge/skills/markerikson/opencode-config-example/dex.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,723 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 89% 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 $0.00026 $0.01723
Opus 5.5 $0.00010 $0.00689
Sonnet 5.5 $0.00005 $0.00345
Haiku 4.5 $0.00003 $0.00172

Measured 1mo ago against content hash 2e9ae75dc0f3, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

dex 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 1mo 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.

Origin

This is a copy

89% identical to dex — 52 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.

config/skill/dex/SKILL.md · 217 lines

How it starts

The opening of the file, as written. The whole thing — 217 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Coordination with dex

Version: 0.16+ (this doc assumes 0.16 features)

Command Invocation

Use dex directly for all commands. If not on PATH, use npx @zeeg/dex instead.

command -v dex &>/dev/null && echo "use: dex" || echo "use: npx @zeeg/dex"

Core Principle: Tickets, Not Todos

Dex tasks are tickets - structured artifacts with comprehensive context:

  • Name: One-line summary (issue title)
  • Description: Full background, requirements, approach (issue body)
  • Result: Implementation details, decisions, outcomes (PR description)

Think: "Would someone understand the what, why, and how from this task alone?"

Dex Tasks are Ephemeral

Never reference dex task IDs in external artifacts (commits, PRs, docs). Task IDs like abc123 become meaningless once tasks are completed. Describe the work itself, not the task that tracked it.

When to Use dex

Use dex when:

  • Breaking down complexity into subtasks
  • Work spans multiple sessions
  • Context needs to persist for handoffs
  • Recording decisions for future reference

Skip dex when:

  • Work is a single atomic action
  • Everything fits in one session with no follow-up
  • Overhead exceeds value

dex vs Built-in Task Tools

Some AI agents (like Claude Code) have built-in task tools. These are session-only and not the same as dex.

dex Built-in Task Tools
Persistence Files in .dex/ Session-only
Context Rich (description + context + result) Basic
Hierarchy 3-level (epic → task → subtask) Flat

Use dex for persistent work. Use built-in task tools for ephemeral in-session tracking only.

Basic Workflow

Start Working on a Task

dex list                  # See pending tasks
dex start <id>            # Mark task as in progress
dex show <id>             # Full details
dex list --in-progress    # Show in-progress tasks

Read the full file on GitHub · 217 lines

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. 1mo ago First seen · 217 lines · 26 tokens per session scan A 2e9ae75dc0f3

Subscribe to this mod's changes

dex is a skill published in the GitHub repository markerikson/opencode-config-example (48 stars, last pushed 5mo ago), licensed MIT. It adds 26 tokens to every session and 1,723 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 89% identical to dex, differing in 52 lines, and is treated as a copy.

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