Files
BMAD-METHOD/docs/how-to/brownfield/add-feature-to-existing.md
forcetrainer 12d3492e0c Add link auditor, reorganize documentation, and README update (#1277)
* feat: add link auditor tools and fix broken docs links

- Add audit-doc-links.js to scan docs for broken links with auto-resolution
- Add fix-doc-links.js to apply suggested fixes (dry-run by default)
- Remove stale "Back to Core Concepts" breadcrumb links
- Update BMad acronym to "Breakthrough Method of Agile AI Driven Development"
- Update README links to docs.bmad-method.org
- Simplify upgrade callout in getting-started tutorial

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* docs: reorganize docs structure and archive v4 tutorial

- Remove unused section index files (tutorials, how-to, explanation, reference)
- Move getting-started-bmadv4.md to _archive
- Update quick-start-bmgd.md to remove archived file reference
- Update upgrade-to-v6.md
- Update astro.config.mjs for new structure

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* fix: ignore underscore directories in link checker

Update check-doc-links.js to skip _archive, _planning, and other
underscore-prefixed directories when validating links.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* docs: add v4 users section to README

Add links to v4 documentation archive and upgrade guide for users
migrating from previous versions.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* feat: convert docs to site-relative links and add validation tools

- Convert all relative links (./  ../) to site-relative paths (/path/)
- Strip .md extensions and use trailing slashes for Astro/Starlight
- Add fix-doc-links.js to convert relative links to site-relative
- Add validate-doc-links.js to check links point to existing files
- Remove old audit-doc-links.js and check-doc-links.js
- Update build-docs.js to use new validation script
- Add npm scripts: docs:fix-links, docs:validate-links
- Update style guide with validation steps

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* docs: standardize acronym to BMad across documentation

Replace incorrect "BMAD" with correct "BMad" in text and frontmatter
while preserving "BMAD-METHOD" in GitHub URLs.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* docs: fix BMad acronym and remove draft README

- Correct acronym to "Breakthrough Method of Agile AI Driven Development"
- Remove unused README-draft.md

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* docs: standardize BMad acronym in README

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* docs: standardize FAQ format across all FAQ pages

- Add TOC with jump links under "## Questions"
- Use ### headers for questions (no Q: prefix)
- Direct answers without **A:** prefix
- Remove horizontal rules and "Related Documentation" sections
- End each FAQ with issue/Discord CTA
- Update style guide with new FAQ guidelines
- Delete redundant faq/index.md (sidebar handles navigation)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* fix: use repo-relative links with .md for GitHub compatibility

Convert all documentation links to repo-relative format (/docs/path/file.md)
so they work when browsing on GitHub. The rehype plugin strips /docs/ prefix
and converts .md to trailing slash at build time for Astro/Starlight.

- Update rehype-markdown-links.js to strip /docs/ prefix from absolute paths
- Update fix-doc-links.js to generate /docs/ prefixed paths with .md extension
- Convert 217 links across 64 files to new format

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* fix: handle /docs/ prefix in link validator

Update resolveLink to strip /docs/ prefix from repo-relative links
before checking if files exist.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* docs: restore FAQ index page

Re-add the FAQ index page that was accidentally deleted, with
updated repo-relative link format.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: Alex Verkhovsky <alexey.verkhovsky@gmail.com>
2026-01-10 02:55:33 +08:00

2.3 KiB

title, description
title description
How to Add a Feature to an Existing Project How to add new features to an existing brownfield project

Add new functionality to your brownfield codebase while respecting existing patterns and architecture.


When to Use This

  • Adding a new feature to an existing codebase
  • Major enhancements that need proper planning
  • Features that touch multiple parts of the system

Prerequisites

  • BMad Method installed
  • Existing project documentation (run document-project first if needed)
  • Clear understanding of what you want to build

Steps

1. Run workflow-init

Run workflow-init

The workflow should recognize you're in an existing project. If not, explicitly clarify that this is brownfield development.

2. Choose Your Approach

Feature Scope Recommended Approach
Small (1-5 stories) Quick Flow with tech-spec
Medium (5-15 stories) BMad Method with PRD
Large (15+ stories) Full BMad Method with architecture

3. Create Planning Documents

For Quick Flow:

  • Load PM agent
  • Run tech-spec workflow
  • The agent will analyze your existing codebase and create a context-aware spec

For BMad Method:

  • Load PM agent
  • Run PRD workflow
  • Ensure the agent reads your existing documentation
  • Review that integration points are clearly identified

4. Consider Architecture Impact

If your feature affects system architecture:

  • Load Architect agent
  • Run architecture workflow
  • Ensure alignment with existing patterns
  • Document any new ADRs (Architecture Decision Records)

5. Implement

Follow the standard Phase 4 implementation workflows:

  1. sprint-planning - Organize your work
  2. create-story - Prepare each story
  3. dev-story - Implement with tests
  4. code-review - Quality assurance

Tips

  • Always ensure agents read your existing documentation
  • Pay attention to integration points with existing code
  • Follow existing conventions unless deliberately changing them
  • Document why you're adding new patterns (if any)