compose:parallel

compose:parallel is a skill for Claude Code, Codex from sergezuber/FABULA-LLM-5. It costs 23 tokens per session (1,370 once invoked), scanned A, a copy of dispatching-parallel-agents, MIT.

A workflow for sending unrelated coding problems to separate agents at the same time. An agent is a helper process that investigates or changes code independently.

In plain words
What is it for?
Use it for independent failing tests, bugs, or subsystem issues that have no shared state or sequential dependency.
Why use it?
It reduces waiting when several failures or subsystems do not depend on one another. It also keeps each investigation focused on one problem.

Skill for Claude CodeCodex

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

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/sergezuber/fabula-llm-5/parallel
Any agent
npx skills add sergezuber/FABULA-LLM-5 --skill parallel
Clone the repo
git clone --depth 1 https://github.com/sergezuber/FABULA-LLM-5

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 compose:parallel

README.md
[![agentmods](https://agentmods.dev/badge/skills/sergezuber/fabula-llm-5/parallel.svg)](https://agentmods.dev/skills/sergezuber/fabula-llm-5/parallel)
Your own site
<a href="https://agentmods.dev/skills/sergezuber/fabula-llm-5/parallel"><img src="https://agentmods.dev/badge/skills/sergezuber/fabula-llm-5/parallel.svg" alt="Measured on agentmods" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,370 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 84% 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 $0.00023 $0.01370
Opus 5 $0.00012 $0.00685
Sonnet 5 $0.00005 $0.00274
Haiku 4.5 $0.00002 $0.00137

Measured 6d ago against content hash f4ce3f09bfa7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

compose:parallel 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 6d 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

84% identical to dispatching-parallel-agents — 55 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.

engine/packages/opencode/src/skill/compose/.bundle/parallel/SKILL.md · 169 lines

How it starts

The opening of the file, as written. The whole thing — 169 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Dispatching Parallel Agents

Overview

You delegate tasks to specialized agents with isolated context. By precisely crafting their instructions and context, you ensure they stay focused and succeed at their task. They should never inherit your session's context or history — you construct exactly what they need. This also preserves your own context for coordination work.

When you have multiple unrelated failures (different test files, different subsystems, different bugs), investigating them sequentially wastes time. Each investigation is independent and can happen in parallel.

Core principle: Dispatch one agent per independent problem domain. Let them work concurrently.

When to Use

  1. Multiple failures? — No → not applicable
  2. Are they independent? — No (related) → single agent investigates all
  3. Can they work in parallel? — No (shared state) → sequential agents / Yes → parallel dispatch

Use when:

  • 3+ test files failing with different root causes
  • Multiple subsystems broken independently
  • Each problem can be understood without context from others
  • No shared state between investigations

Don't use when:

  • Failures are related (fix one might fix others)
  • Need to understand full system state
  • Agents would interfere with each other

The Pattern

1. Identify Independent Domains

Group failures by what's broken:

  • File A tests: Tool approval flow
  • File B tests: Batch completion behavior
  • File C tests: Abort functionality

Each domain is independent - fixing tool approval doesn't affect abort tests.

2. Create Focused Agent Tasks

Each agent gets:

  • Specific scope: One test file or subsystem
  • Clear goal: Make these tests pass
  • Constraints: Don't change other code
  • Expected output: Summary of what you found and fixed

3. Dispatch in Parallel

Send one concurrent tool call per independent problem domain, all in the same turn. Use whichever subagent-dispatch tool is advertised in your tool list, following the syntax in that tool's own description (do not invent fields).

Read the full file on GitHub · 169 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. 6d ago First seen · 169 lines · 23 tokens per session scan A f4ce3f09bfa7

Subscribe to this mod's changes

compose:parallel is a skill published in the GitHub repository sergezuber/FABULA-LLM-5 (83 stars, last pushed 4d ago), licensed MIT. It adds 23 tokens to every session and 1,370 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 84% identical to dispatching-parallel-agents, differing in 55 lines, and is treated as a copy.

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