mdmirror 0.2.0

Mirror a folder tree into Claude-optimal Markdown — single-file bundle by default, ghost-tree mode optional.

mdmirror

Turn any folder into Claude-optimal Markdown context with one command.

mdmirror repo                  # → ./repo.claude.md
mdmirror repo --stdout | pbcopy  # paste-ready clipboard

What it does

• Recursively walks a folder.
• Converts office docs / PDFs / HTML via markitdown.
• Source code (.py, .ts, .go, …) is fenced with the right language tag — no mangling.
• Each file gets a source: frontmatter so the LLM always knows where a chunk came from.
• Output is sorted by path: deterministic, diffable across runs.
• Token count is exact (via tiktoken), not a heuristic.
• Aggressive default ignore list: .git, node_modules, dist, lockfiles, fonts, images, archives. Honors .gitignore.

Install

pipx install mdmirror     # recommended — isolated env
# or
uv tool install mdmirror
# or
pip install mdmirror

Office formats (docx, xlsx, pptx, pdf, outlook) ship in the base install. For audio transcription via whisper:

pipx install '.[audio]'   # adds whisper, youtube-transcription
pipx install '.[all]'     # everything

Modes

Default — Claude bundle

mdmirror repo                # → ./repo.claude.md
mdmirror repo bundle.md      # → ./bundle.md
mdmirror repo --stdout       # stream to stdout

The bundle is a single .md with a header, a complete file tree, then every file in alphabetical order:

# Context bundle: repo

Source root: `/path/to/repo`

## File tree
```
README.md
src/lib/foo.ts
src/main.py
```

---
source: README.md
bytes: 312
---

# Hello

…

<!-- ────────────────────────────── -->

---
source: src/lib/foo.ts
bytes: 412
---

```ts
// file contents
```

Tree mirror

For when you want one .md per file on disk:

mdmirror repo --tree           # → ./repo_md/
mdmirror repo out --tree       # → ./out/
mdmirror repo out --tree --bundle   # tree AND ./repo.claude.md

Flags

Flag	Purpose
--tree	Mirror as a folder of .md files instead of one bundle
--bundle	With --tree, also emit a bundle at ./<input>.claude.md
--stdout	Stream the bundle to stdout (great for | pbcopy)
--overwrite	Replace existing output files
--dry-run	Report planned actions, write nothing
--workers N	Parallel worker processes
--skip-pattern PAT	Extra gitignore-style pattern (repeatable)
--include-hidden	Don't skip dotfiles / dotdirs
--follow-symlinks	Follow symlinks (cycle-safe)
--no-default-ignore	Disable the built-in skip list
--no-gitignore	Don't honor a root .gitignore
--no-frontmatter	Strip the source: YAML header
--no-fence	Disable code fencing (everything goes through markitdown)
-q, -v	Quiet / verbose logging

Behaviors worth knowing

• Naming (tree mode): report.docx becomes report.docx.md so a sibling report.pdf doesn't collide. *.md files pass through unchanged.
• Output safety: refuses to run if the output dir is inside the input dir.
• Failures don't crash the run. Each failed file is logged and counted; everything else still gets converted.
• Logs go to stderr. Stdout stays clean for --stdout piping.

Develop

uv pip install -e '.[dev]'
.venv/bin/pytest -q -m "not integration"   # fast (~0.5s)
.venv/bin/pytest -q                         # incl. real markitdown roundtrip