+## Contributing
+
+- Whenever possible, one commit per feature.
+- If feature/pull-request branches have only one developer, please regularly
+ rebase them onto master until they are merged in.
+- Don't merge branches with meaningless commit messages; always squash them
+ instead.
+- Wait for discussion of big changes. Your branches will still be here
+ tomorrow.
+
+Helpful tip for those merging PRs: you can browse the tree a merge would
+result in by navigating to
+`https://github.com/freenode/web-7.0/tree/pull/XYZ/merge`, where `XYZ` is the
+pull request number.
+
+You can also go to `https://freenode.net/web-7.0/BRANCHNAME/` to see a
+build of any particular branch. This also works for *internal* pull requests
+(they are named `pull-X`).
+
+## Architecture / Orientation
+
+The site is generated from
+[Markdown](https://daringfireball.net/projects/markdown/) sources and
+[Jinja2](http://jinja.pocoo.org/) templates, found in `content/` and
+`templates/` respectively. The Travis build deploys to GitHub Pages
+automatically on every push.
+
+Various modules convert the sources to a useful output structure. Eventually
+cms7 will document this process, but for now:
+
+- `content/pages/` contains plain pages which are rendered in `out/` using
+ `page.html`.
+- `content/news/` contains blog/news posts which are rendered in `out/news/`
+ using `article.html`.
+- `content/kb/` contains KB categories: each directory `content/kb/X/`
+ has the entries for category `X`. These are rendered in `out/kb/answers/`
+ with `kb.html`.
+
+ Indexes of these entries are rendered in `out/kb/` with `kb_index.html`,
+ according to a list in `config/kb.yml`.
+
+
+### Markdown metadata
+
+cms7 uses the markdown metadata extension, and recognises some special keys:
+
+- `title` sets the page title
+- `slug` overrides the target URL: `pages/hello` with `slug: banana` would
+ become `out/banana.html`
+- `template` overrides the template with which to render this Markdown file
+
+Blog-specific:
+
+- `author`
+- `date`
+
+
+### Internal linking
+
+Everything that ends up in the final output has a name that identifies it to
+the rest of the website. If a file is derived directly from an input file,
+generally its name is derived from the name of the *input*.
+
+- Markdown files like `content/pages/hello.md` are named their own name
+ relative to the content directory, minus their extension: `pages/hello`.
+- static resources like `static/img/cat.jpg` are named their own name
+ relative to the repository root: `static/img/cat.jpg`.
+- Templates that are rendered from nothing (e.g. to make the index page) are
+ named whatever the config file says to name them.
+- KB indexes are named `kb/index/X`, where X is the name of the index in
+ `config/kb.yml`.
+
+cms7 can generate a relative URL to anything with a name from any page. This
+should always be preferred over manually writing links. To generate a relative
+link from a Markdown document, just link to a name:
+
+```markdown
+[A page about frogs](pages/frog)
+```
+
+To do the same from a template, call `url_for`:
+
+```html+jinja
+<a href="{{ url_for('pages/frog') }}">A page about frogs</a>
+```