epic-breakdown

epic-breakdown is a skill for Claude Code, Codex from quanghoangf/vibedoc. It costs 169 tokens per session (2,983 once invoked), scanned A, original, MIT.

A planning tool that turns one large roadmap item, called an epic, into a short ordered list of implementation tasks for a coding agent.

In plain words
What is it for?
Use it to choose an epic from a VibeDoc roadmap and create self-contained task files with scope, effort, quality, and verification details.
Why use it?
It removes vague handoffs by recording what to build, where it belongs, how it should match the existing code, and how to check the result.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions CLAUDE.md; names the AskUserQuestion tool; mentions AGENTS.md.

Good fit Use it to choose an epic from a VibeDoc roadmap and create self-contained task files with scope, effort, quality, and verification details.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/quanghoangf/vibedoc/epic-breakdown
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 quanghoangf/vibedoc --skill epic-breakdown
Clone the repo
git clone --depth 1 https://github.com/quanghoangf/vibedoc

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 epic-breakdown

README.md
[![agentmods](https://agentmods.dev/badge/skills/quanghoangf/vibedoc/epic-breakdown/github.svg)](https://agentmods.dev/skills/quanghoangf/vibedoc/epic-breakdown)
Your own site
<a href="https://agentmods.dev/skills/quanghoangf/vibedoc/epic-breakdown"><img src="https://agentmods.dev/badge/skills/quanghoangf/vibedoc/epic-breakdown/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 epic-breakdown

Your own site · 80×15
<a href="https://agentmods.dev/skills/quanghoangf/vibedoc/epic-breakdown"><img src="https://agentmods.dev/badge/skills/quanghoangf/vibedoc/epic-breakdown.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 169 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,983 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00169 $0.02983
Opus 5.5 $0.00068 $0.01193
Sonnet 5.5 $0.00034 $0.00597
Haiku 4.5 $0.00017 $0.00298

Measured yesterday against content hash 2a038e61953d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-30, from the pricing page.

Security

Grade A, and why

epic-breakdown scanned grade A with 1 finding 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 yesterday.

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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

<exact commands from this project: build, lint, tests, a curl or a page to open>
skills/epic-breakdown/SKILL.md · 171 lines

How it starts

The opening of the file, as written. The whole thing — 171 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Epic breakdown

Turn one epic into a short, ordered list of tasks. A coding agent should be able to pick up any one of them cold and finish it. This skill is a follow-up to roadmap-planner: epics are roadmap items that have a **Parent:** (horizon), and their body often already contains In scope / Out of scope / Done when.

The tasks are the product of this skill. Someone who reads a task file should know what to build, where it goes, how it follows the codebase's patterns, and how to prove it works, without asking anyone. A vague task gets a vague implementation.

1. Pick the epic

Argument given: resolve it.

  • An id: R004, r4.
  • A path: plans/roadmap/R004-billing.md.
  • A title fragment: match it against the titles.

Read the file. If what you read is a horizon (it has no **Parent:**), say so and treat it as "no argument", listing only that horizon's epics.

No argument: list the epics and let the user choose.

  1. Get every item with vibedoc_get_roadmap (MCP), or read plans/roadmap/R*.md. Epics are the items that have a parent.

  2. Print a compact table: id, title, horizon, status, and linked task count with their done count. For example:

    ID    Epic                 Horizon  Status       Tasks
    R005  Self-serve billing   Now      in-progress  2/5 done
    R006  Team workspaces      Now      planned      —
    R009  Public API           Next     planned      —
    
  3. Ask one single-select AskUserQuestion with the 3–4 most likely candidates, in this order: in-progress epics first, then planned epics with no tasks in the earliest horizon. Leave out done epics. The user can pick "Other" to type any id.

If the chosen epic already has linked tasks, show them and ask whether to add the missing tasks or stop. Never rewrite existing task files, because an agent may already be working from them.

A spec instead of an epic: the user pastes a feature spec (or describes a feature) rather than naming an epic. Use the spec as the epic body in the steps below, and first ask one single-select question about where the tasks go:

Read the full file on GitHub · 171 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. yesterday First seen · 171 lines · 169 tokens per session scan A 2a038e61953d

Subscribe to this mod's changes

epic-breakdown is a skill published in the GitHub repository quanghoangf/vibedoc (5 stars, last pushed today), licensed MIT. It adds 169 tokens to every session and 2,983 once invoked, about $0.0007 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-29.