parallel-task

parallel-task is a skill for Claude Code, Codex from jdrhyne/agent-skills. It costs 27 tokens per session (982 once invoked), scanned A, original, MIT.

A task coordinator for running independent coding tasks at the same time through multiple helper agents. It reads a Markdown plan and follows its task dependencies and validation rules.

In plain words
What is it for?
Use it with an explicit /parallel-task command to run a selected sprint or phase from a plan file in parallel.
Why use it?
It reduces waiting when several tasks can be worked on independently. It also prevents agents from editing the same files prematurely or claiming unfinished work is complete.

Skill for Claude CodeCodex

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/jdrhyne/agent-skills/parallel-task
Any agent
npx skills add jdrhyne/agent-skills --skill parallel-task
Clone the repo
git clone --depth 1 https://github.com/jdrhyne/agent-skills

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 parallel-task

README.md
[![agentmods](https://agentmods.dev/badge/skills/jdrhyne/agent-skills/parallel-task.svg)](https://agentmods.dev/skills/jdrhyne/agent-skills/parallel-task)
Your own site
<a href="https://agentmods.dev/skills/jdrhyne/agent-skills/parallel-task"><img src="https://agentmods.dev/badge/skills/jdrhyne/agent-skills/parallel-task.svg" alt="Measured on agentmods" height="20"></a>
Per session 27 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 982 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 $0.00027 $0.00982
Opus 5 $0.00014 $0.00491
Sonnet 5 $0.00005 $0.00196
Haiku 4.5 $0.00003 $0.00098

Measured 4d ago against content hash e6a3c38a4f28, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

parallel-task 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 4d 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/parallel-task/SKILL.md · 159 lines

How it starts

The opening of the file, as written. The whole thing — 159 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Parallel Task Runner

Use Orchestration Mode. Parse plan files and delegate tasks to parallel subagents.

Safety Boundaries

  • Do not launch subagents for tasks that share write scope until the dependency is resolved.
  • Do not continue past blockers silently; surface the blocked task and stop that branch of work.
  • Do not mark tasks complete until validation from the plan has actually been checked.
  • Do not run this skill unless the user explicitly invoked /parallel-task or clearly asked for parallel agent work.

Process

Step 1: Parse Request

Extract from user request:

  1. Plan file: The markdown plan to read
  2. Sprint/Phase (optional): Which section to run

If sprint not provided, ask user which to run.

Step 2: Read & Parse Plan

  1. Find sprint/phase section (e.g., ## Sprint 1:)
  2. Extract task subsections (e.g., ### Task 1.1:)
  3. For each task, extract:
    • Task ID and name
    • Full content (description, location, acceptance criteria, validation)
  4. Build task list

Step 3: Launch Subagents

For each task, launch subagent with:

  • description: "Implement task [ID]: [name]"
  • prompt: Use template below

If there are multiple unblocked tasks, launch multiple subagents in parallel.

Task Prompt Template

You are implementing a specific task from a development plan.

## Context
- Plan: [filename] - [sprint/phase]
- Goals: [relevant overview from plan]
- Dependencies: [prerequisites for this task]
- Related tasks: [tasks in same sprint]
- Constraints: [risks from plan]

## Your Task
**Task [ID]: [Name]**

Location: [File paths]
Description: [Full description]

Acceptance Criteria:
[List from plan]

Validation:
[Tests or verification from plan]

## Instructions
1. Examine and explore the plan, all relevant files & dependencies. Ensure ambiguities are cleared up.
2. Implement changes for all acceptance criteria
3. Keep work **atomic and committable**
4. For each file: read first, edit carefully, preserve formatting
5. Run validation if feasible
6. Return summary of:
   - Files modified/created
   - Changes made
   - How criteria are satisfied
   - Validation performed or deferred

## Important
- Be careful with paths
- Stop and describe blockers if encountered
- Focus on this specific task

Read the full file on GitHub · 159 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. 4d ago First seen · 159 lines · 27 tokens per session scan A e6a3c38a4f28

Subscribe to this mod's changes

parallel-task is a skill published in the GitHub repository jdrhyne/agent-skills (241 stars, last pushed 5d ago), licensed MIT. It adds 27 tokens to every session and 982 once invoked, about $0.0001 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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