diff --git a/wiki/main/help/plugin/1.markdown b/wiki/main/help/plugin/1.markdown
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+# Plugin system RFC
+MycorrhizaWiki engine does not provide all the functionality a wiki may need and not need. Instead, it relies on the system of plugins.
+
+## Types of plugins
+- **Parser.** They add support for displaying different MIME-types.
+- **Utilities.** They add hyphae to the `:spec` mycelium. These hyphae provide administrative functionality.
+- **Macros.** Something like [moinmoin ones](http://moinmo.in/HelpOnMacros), I guess.
+
+## Default plugins
+Default MycorrhizaWiki distributive is shipped with several plugins installed.
+
+- **parser/markdown.** Support for `text/markdown`.
+- **parser/gemini.** Support for `text/gemini`.
+- *what other markups to ship? I don't want to have markdown as the main one. Textile? ReST? Asciidoc is too complex, so let's not choose it.*
+- **utility/rename.** Renaming of non-user hyphae.
+- *what else?*
+- **macro/toc.** Table of contents.
+- *what else?*
+
+## Plugin implementation
+All plugins are written in Go and are compiled together with MycorrhizaWiki. If a wiki's admin decides to add a plugin, they shall recompile the engine with the plugin.
+
+> Reminds of [something](http://suckless.org/), right?
+
+*But compiling the engine just to add a plugin is stupid!!* Not really. Also, it makes the architecture more simple and secure.
+
+*What if an admin doesn't know how to program?* Plugin installation is basically limited to putting some files into a folder, editing the config and running a shell command. No programming required to install a plugin.
+
+
diff --git a/wiki/main/help/plugin/meta.json b/wiki/main/help/plugin/meta.json
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+{
+	"views": 0,
+	"deleted": false,
+	"revisions": {
+		"1": {
+			"tags": [
+				""
+			],
+			"name": "Plugin",
+			"comment": "Update :Main/Help/Plugin",
+			"author": "",
+			"time": 1593806875,
+			"text_mime": "text/markdown",
+			"binary_mime": "",
+			"text_name": "1.markdown",
+			"binary_name": ""
+		}
+	}
+}
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diff --git a/wiki/main/help/wikilink/1.markdown b/wiki/main/help/wikilink/1.markdown
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+# Wikilink RFC
+
+All parsers for MycorrhizaWiki provide hyperlink support. Usually, they follow HTML convention.
+
+- `http://example.org/absolute-path`
+- `/rooted-path`
+- `same-folder-path`
+- `../parent-folder-path`
+
+This is not really convenient for wikis where most of links are either rooted or links to children!
+
+All parsers of MycorrhizaWiki are expected to support these types of links and convert them to rooted paths.
+
+- `http://example.org/absolute-path`
+- `hypha in main mycelium`
+- `::hypha in the same mycelium`
+- `:mycelium/hypha in an explicit mycelium`
+- `/subhypha`
+- `./subhypha`
+- `../sibling-hypha`
+
+**TODO:** create a package that implements this thing. NB: to generate a correct link, it is required to know full name of hypha where the link is used.
+
+## Markdown extension
+
+> This is an extension to markdown's syntax that is used in MycorrhizaWiki and nowhere else.
+
+Text wrapped in `[[` and `]]` is a link that has same text and url. *For some reason it's not possible in Markdown without duplicating url*
+
+```
+[[x]] == [x](x)
+```
+
+## Examples
+
+All examples assume that `:example/test` is the current hypha.
+
+```
+wikilink    actual path
+foo      == /foo
+::foo    == /:example/foo
+:bar/foo == /:bar/foo
+/baz     == /:example/baz
+./baz    == /:example/baz
+../qux   == /:example/qux
+```
diff --git a/wiki/main/help/wikilink/meta.json b/wiki/main/help/wikilink/meta.json
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+{
+	"views": 0,
+	"deleted": false,
+	"revisions": {
+		"1": {
+			"tags": [
+				""
+			],
+			"name": "Wikilink",
+			"comment": "Update :Main/Help/Wikilink",
+			"author": "",
+			"time": 1593807908,
+			"text_mime": "text/markdown",
+			"binary_mime": "",
+			"text_name": "1.markdown",
+			"binary_name": ""
+		}
+	}
+}
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