<!-- SPDX-License-Identifier: MIT -->
<!-- SPDX-FileCopyrightText: 2025-2026 Marcus Quinn -->

# Task Brief: t15075 - Tighten agent doc Concurrency Patterns

## Session Origin
- GitHub Issue: #15075 (https://github.com/marcusquinn/aidevops/issues/15075)

## What
- Simplify and restructure `.agents/tools/programming/modern-javascript-skill/concurrency.md`.
- Classification: Reference corpus.
- Action: Extract major sections into chapter files and replace the original with a slim index.

## Why
- The file is 221 lines long and has been flagged for simplification.
- Restructuring into chapters improves readability and maintainability.

## How
1. Create a directory `.agents/tools/programming/modern-javascript-skill/concurrency/`.
2. Extract each major section into its own file in that directory:
   - `01-sequential.md`
   - `02-parallel.md`
   - `03-batched.md`
   - `04-pool.md`
   - `05-retry.md`
   - `06-timeout.md`
   - `07-debounce.md`
   - `08-throttle.md`
   - `09-async-iteration.md`
   - `10-cancellation.md`
   - `11-semaphore.md`
3. Replace `.agents/tools/programming/modern-javascript-skill/concurrency.md` with a slim index containing a table of contents and file pointers.
4. Ensure zero content loss.

## Acceptance Criteria
- All code blocks, URLs, task ID references, and command examples are preserved.
- No broken internal links or references.
- `wc -l` total of chapter files >= original line count minus index overhead.
- PR opened and merged.

## Context
- This file was previously simplified (PR #13349) but has since been modified.
- The content hash no longer matches the post-simplification state.
