dependency-mapping

dependency-mapping is a skill for Claude Code, Codex from britt/agent-skills. It costs 45 tokens per session (1,579 once invoked), scanned A, original, MIT.

A tool for showing which GitHub issues depend on other issues. GitHub issues are work items such as bugs, tasks, or feature requests, and the tool presents their relationships as Mermaid flowcharts.

In plain words
What is it for?
Use it during planning to map issue dependencies, identify blockers, and show which tasks can happen at the same time.
Why use it?
It makes blocked work and the order of tasks visible, helping teams find the critical path through a project.

Skill for Claude CodeCodex

Part of the agent-skills plugin — 27 skills shipped together

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.

agentmods
npx agentmods add skills/britt/agent-skills/dependency-mapping
Any agent
npx skills add britt/agent-skills --skill dependency-mapping
Clone the repo
git clone --depth 1 https://github.com/britt/agent-skills

Made for: Claude Code, Codex.

Or install agent-skills, the plugin that ships this one along with the rest of its 27 skills.

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 dependency-mapping

README.md
[![agentmods](https://agentmods.dev/badge/skills/britt/agent-skills/dependency-mapping.svg)](https://agentmods.dev/skills/britt/agent-skills/dependency-mapping)
Your own site
<a href="https://agentmods.dev/skills/britt/agent-skills/dependency-mapping"><img src="https://agentmods.dev/badge/skills/britt/agent-skills/dependency-mapping.svg" alt="Measured on agentmods" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,579 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found 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 $0.00045 $0.01579
Opus 5 $0.00023 $0.00790
Sonnet 5 $0.00009 $0.00316
Haiku 4.5 $0.00005 $0.00158

Measured 3d ago against content hash 213906fae010, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

dependency-mapping 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 3d 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.

skills/dependency-mapping/SKILL.md · 249 lines

How it starts

The opening of the file, as written. The whole thing — 249 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Dependency Mapping Skill

Generate Mermaid flowcharts that visualize GitHub issue dependencies, blocking relationships, and critical paths through the project.

When to Use

Activate this skill when:

  • User asks "show me the dependencies", "map the issue dependencies"
  • User wants to see which issues block others
  • During sprint planning to identify critical path
  • After issue decomposition to visualize relationships

CRITICAL: Mermaid Syntax Rules

NEVER use parentheses in node labels

Parentheses break GitHub rendering.

WRONG:

flowchart LR
    I1[#1 Setup (init)]

CORRECT:

flowchart LR
    I1[#1 Setup - init]

Issue Node Naming Convention

Use consistent naming for issue nodes:

flowchart LR
    I201[#201 Setup auth module]
    I202[#202 Implement login]
    I203[#203 Add password reset]

Format: I<number>[#<number> <short title>]

Dependency Graph Patterns

Linear Dependencies

Issues that must be done in sequence:

flowchart LR
    I1[#1 Setup project] --> I2[#2 Create database]
    I2 --> I3[#3 Add API endpoints]
    I3 --> I4[#4 Integration tests]

Parallel Work

Issues that can be done simultaneously:

flowchart TB
    I1[#1 Setup project]
    I1 --> I2[#2 Frontend setup]
    I1 --> I3[#3 Backend setup]
    I2 --> I4[#4 Integration]
    I3 --> I4

Complex Dependencies

Multiple blocking relationships:

flowchart TB
    subgraph Foundation
        I1[#1 Project setup]
        I2[#2 Database schema]
    end

    subgraph Features
        I3[#3 User auth]
        I4[#4 User profile]
        I5[#5 Settings page]
    end

    subgraph Integration
        I6[#6 End-to-end tests]
    end

    I1 --> I2
    I1 --> I3
    I2 --> I3
    I3 --> I4
    I3 --> I5
    I4 --> I6
    I5 --> I6

Critical Path Highlighting

Emphasize the longest dependency chain:

flowchart LR
    I1[#1 Setup]
    I2[#2 Database]
    I3[#3 Auth]
    I4[#4 API]
    I5[#5 Tests]

    I1 ==> I2
    I2 ==> I3
    I3 ==> I4
    I4 ==> I5

    I1 --> I6[#6 Docs]

    style I1 fill:#f96
    style I2 fill:#f96
    style I3 fill:#f96
    style I4 fill:#f96
    style I5 fill:#f96

Read the full file on GitHub · 249 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. 3d ago First seen · 249 lines · 45 tokens per session scan A 213906fae010

Subscribe to this mod's changes

dependency-mapping is a skill published in the GitHub repository britt/agent-skills (5 stars, last pushed 4d ago), licensed MIT. It adds 45 tokens to every session and 1,579 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 2026-08-31.

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