Borrowing it
Nothing to install: this file belongs to istarwyh/mcpadvisor. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/istarwyh/mcpadvisor/main/.claude/commands/BMad/tasks/create-brownfield-story.mdgit clone --depth 1 https://github.com/istarwyh/mcpadvisorWrote 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.
[](https://agentmods.dev/commands/istarwyh/mcpadvisor/create-brownfield-story)<a href="https://agentmods.dev/commands/istarwyh/mcpadvisor/create-brownfield-story"><img src="https://agentmods.dev/badge/commands/istarwyh/mcpadvisor/create-brownfield-story/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.
<a href="https://agentmods.dev/commands/istarwyh/mcpadvisor/create-brownfield-story"><img src="https://agentmods.dev/badge/commands/istarwyh/mcpadvisor/create-brownfield-story.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00000 | $0.02038 |
| Opus 5.5 | $0.00000 | $0.00815 |
| Sonnet 5.5 | $0.00000 | $0.00408 |
| Haiku 4.5 | $0.00000 | $0.00204 |
Grade C, and why
create-brownfield-story scanned grade C 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 19d 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.
Hidden instructionshighPrompt injection
Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.
<!-- Context: Brownfield enhancement to {{existing system}} --> Copies of this mod
4 near-identical copies found in the catalogue:
- create-brownfield-story — 98% identical, 2 lines differ
- create-brownfield-story — 94% identical, 4 lines differ
- create-brownfield-story — 94% identical, 4 lines differ
- create-brownfield-story — 94% identical, 4 lines differ
How it starts
The opening of the file, as written. The whole thing — 319 lines — stays where its author put it; the contents beside it link to each section on GitHub.
/create-brownfield-story Task
When this command is used, execute the following task:
Create Brownfield Story Task
Purpose
Create detailed, implementation-ready stories for brownfield projects where traditional sharded PRD/architecture documents may not exist. This task bridges the gap between various documentation formats (document-project output, brownfield PRDs, epics, or user documentation) and executable stories for the Dev agent.
For a tiny, isolated enhancement requiring only one focused session, use brownfield-create-story.md instead. Keep this task for detailed stories that need documentation discovery and additional context.
When to Use This Task
Use this task when:
- Working on brownfield projects with non-standard documentation
- Stories need to be created from document-project output
- Working from brownfield epics without full PRD/architecture
- Existing project documentation doesn't follow BMad v4+ structure
- Need to gather additional context from user during story creation
Use create-next-story when:
- Working with properly sharded PRD and v4 architecture documents
- Following standard greenfield or well-documented brownfield workflow
- All technical context is available in structured format
Task Execution Instructions
0. Documentation Context
Check for available documentation in this order:
-
Sharded PRD/Architecture (docs/prd/, docs/architecture/)
- If found, recommend using create-next-story task instead
-
Brownfield Architecture Document (docs/brownfield-architecture.md or similar)
- Created by document-project task
- Contains actual system state, technical debt, workarounds
-
Brownfield PRD (docs/prd.md)
- May contain embedded technical details
-
Epic Files (docs/epics/ or similar)
- Created by brownfield-create-epic task
-
User-Provided Documentation
- Ask user to specify location and format
1. Story Identification and Context Gathering
1.1 Identify Story Source
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.
- 19d ago First seen · 319 lines · 0 tokens per session scan C f9a11cd4335a
create-brownfield-story is a command published in the GitHub repository istarwyh/mcpadvisor (89 stars, last pushed 4d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,038 tokens. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-12.
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