fusion-plan

fusion-plan is a skill for Claude Code, Codex from duolahypercho/fusion-fable. It costs 266 tokens per session (3,010 once invoked), scanned A, original, MIT.

A planning tool that gathers requirements and then develops an implementation, architecture, or strategy plan through several review rounds.

In plain words
What is it for?
Use it to plan software changes, system architecture, or broader technical strategies, including work carried out without live user questions.
Why use it?
It helps turn an unclear request into a checked, concise plan before implementation begins.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: reads .claude/ paths; mentions subagents; names the AskUserQuestion tool.

Good fit Use it to plan software changes, system architecture, or broader technical strategies, including work carried out without live user questions.

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Install with agentmods
npx agentmods add skills/duolahypercho/fusion-fable/fusion-plan
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 duolahypercho/fusion-fable --skill fusion-plan
Clone the repo
git clone --depth 1 https://github.com/duolahypercho/fusion-fable

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 fusion-plan

README.md
[![agentmods](https://agentmods.dev/badge/skills/duolahypercho/fusion-fable/fusion-plan/github.svg)](https://agentmods.dev/skills/duolahypercho/fusion-fable/fusion-plan)
Your own site
<a href="https://agentmods.dev/skills/duolahypercho/fusion-fable/fusion-plan"><img src="https://agentmods.dev/badge/skills/duolahypercho/fusion-fable/fusion-plan/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 fusion-plan

Your own site · 80×15
<a href="https://agentmods.dev/skills/duolahypercho/fusion-fable/fusion-plan"><img src="https://agentmods.dev/badge/skills/duolahypercho/fusion-fable/fusion-plan.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 266 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,010 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 3 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Agent Snooping · line 82
    Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.
    Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
  • high Agent Snooping · line 83
    Skill reads from agent configuration directories (.claude/, .codex/, .gemini/). These directories may contain API keys, personal settings, and other credentials that the skill has no legitimate need to access.
    Fix: Remove all code or instructions that access agent configuration directories (.claude/, .codex/, .gemini/). If configuration values are needed, pass them explicitly as parameters or environment variabl
  • medium Rogue Agent · line 119
    Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.
    Fix: Remove any persistence mechanisms (cron jobs, startup scripts, state files). Skills should not maintain state across sessions without explicit user consent.
How audits are shown
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 $0.00266 $0.03010
Opus 5 $0.00133 $0.01505
Sonnet 5 $0.00053 $0.00602
Haiku 4.5 $0.00027 $0.00301

Measured 11d ago against content hash 39b5381d72b4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

fusion-plan 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 11d 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/fusion-plan/SKILL.md · 197 lines

How it starts

The opening of the file, as written. The whole thing — 197 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Fusion-Plan — OMC interview, then a 3-round iterative panel

This skill follows the OMC plan system: requirements are gathered by OMC's real interview FIRST, then the fusion panel deepens the resulting plan, and the output flows back into OMC's review → execution pipeline. The fusion panel replaces only the plan-thinking step; storage, format, the quality gate, and execution all stay on OMC's rails.

Hard rule (same as fusion): Opus 4.8 always judges and synthesizes. You are the judge — stay separate from the panelists. The Opus panelist is always a spawned subagent, never you.

Step 0 — Requirements (pick the mode FIRST)

Decide interactive vs non-interactive before doing anything — this determines whether you may interview.

  • Non-interactive when ANY of these is true: invoked with --no-interview; running autonomously while executing a larger plan; running inside a spawned sub-agent; or you otherwise cannot reach a human who will answer. This is the default during plan execution.
  • Interactive only when a human is clearly present and able to answer right now — typically the user typed /fusion-plan ... directly in the main session at the start of a planning session.

Non-interactive mode (autonomous / sub-agent / --no-interview)

HARD RULE: do NOT interview. Do NOT call AskUserQuestion. Do NOT auto-chain the omc-plan interview. There is no one to answer — blocking on a question would hang the run. Requirements were already gathered upstream, so derive SEED_PLAN from the context that already exists, in this order:

  1. The task/story doc if one exists (e.g. docs/stories/STORY-<id>.md).
  2. The larger plan that flagged this task (e.g. the relevant .omc/plans/*.md section).
  3. The task description / prompt args you were given.

If that context is genuinely insufficient to plan, do NOT guess and do NOT ask — stop and return a short note listing exactly what's missing, so the human (or the orchestrator) resolves it. Then go to Step 1.

Read the full file on GitHub · 197 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. 11d ago First seen · 197 lines · 266 tokens per session scan A 39b5381d72b4

Subscribe to this mod's changes

fusion-plan is a skill published in the GitHub repository duolahypercho/fusion-fable (471 stars, last pushed 1mo ago), licensed MIT. It adds 266 tokens to every session and 3,010 once invoked, about $0.0013 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 2026-08-30.

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