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 # `dev`
-
 `dev` uses `pkgx` and shellcode to automatically, install and activate the
 packages you need for different projects as you navigate in your shell.
-
 Ensure you are using the same versions of tools for your entire stack, during
 dev, across your team and in production.
-
 > [!NOTE]
 > Packages are installed to `~/.pkgx` and not available to your wider system
 > without using a tool from the `pkgx` tooling ecosystem.
-
 ## Getting Started
-
 Since `dev` v1.8.0 we integrate with `pkgm` (^0.11) and this is the recommended
 way to use `dev`.
-
 > [!IMPORTANT]
->
 > Both `dev` and the packages you want to be `dev`-aware must be installed to
 > `/usr/local/` for this to work. (`dev` (but only `dev`) can be a `pkgm shim`).
->
 > ```sh
 > sudo pkgm install dev node@22
 > ```
-
 ```sh
 $ cd my-project
 $ ls
 package.json
-
 $ node --version
 command not found: node
-
 $ sudo pkgm install dev node
 $ node --version && which node
 v23.11.0
 /usr/local/bin/node
-
 $ cat package.json | jq .engines
 {
   "node": "^20"
 }
-
 $ dev .
 activated `~/my-project` (+node^20)
-
 $ node --version && which node
 v20.19.0
 /usr/local/bin/node
-
 $ cd ..
 $ node --version && which node
 v23.11.0
 /usr/local/bin/node
-
 $ cd -
 $ node --version && which node
 v20.19.0
 /usr/local/bin/node
 ```
-
 `pkgm` installs `dev`-aware packages to `/usr/local/bin`. Provided you have
 `/usr/local/bin/dev` installed and you have activated `dev` in your project
 directories the `node` that is invoked is swapped out _when invoked_.
-
 This is the recommended way to use `dev` because it works everywhere and not
 just the terminal.
-
 ## `dev` via Shellcode
-
 Using `dev` via shellcode requires hooks to be installed in your shell. It is
 handy in that no tool needs to be installed. It is problematic in that shell
 hooks are more invasive and don’t work in other tools like editors.
-
 ---
-
 <details>
 <summary>Using <code>dev</code> via shellcode…</summary>
-
 A great advantage of the shellcode is not needing to install tools you may never
 need again when exploring new open source projects.
-
 ```sh
 pkgx dev integrate
 ```
-
 `dev` requires `pkgx` but at your preference:
-
 ```sh
 brew install pkgxdev/made/dev
 dev integrate
 ```
-
 We support macOS & Linux, **Bash** & **Zsh**. PRs are very welcome to support
 more shells.
-
 > [!NOTE]
->
 > `dev integrate` looks for and edits known `shell.rc` files adding one line:
->
 > ```sh
 > eval "$(dev --shellcode)"
 > ```
->
 > If you don’t trust us (good on you), then do a dry run first:
->
 > ```sh
 > pkgx dev integrate --dry-run
 > ```
 >
 > If you like, preview the shellcode: `pkgx dev --shellcode`. This command only
 > outputs shellcode, it doesn’t modify any files or do anything else either.
-
 ### Usage
-
 ```sh
 $ cd my-project
-
 my-project $ ls
 package.json
-
 my-project $ dev
 +nodejs.org
 # ^^ installs node to ~/.pkgx/nodejs.org/v22.12.0 if not already installed
-
 my-project $ node --version
 v22.12.0
-
 $ which node
 ~/.pkgx/nodejs.org/v22.12.0/bin/node
-
 $ cd ..
 -nodejs.org
-
 $ node
 command not found: node
 ```
-
 > [!TIP]
->
 > #### Try Before You `vi`
->
 > Modifying your `shell.rc` can be… _intimidating_. If you just want to
 > temporarily try `dev` out before you `:wq`—we got you:
->
 > ```sh
 > $ cd my-project
 > $ eval "$(pkgx dev)"
@@ -153,46 +109,34 @@ command not found: node
 > ```
 >
 > The devenv will only exist for the duration of your shell session.
-
 </details>
-
 ---
-
 ## How Packages are Determined
-
 - We look at the files you have and figure out the packages you need.
 - Where possible we also determine the versions you need if such things can be
   determined by looking at configuration files.
-
 ## Specifying Versions
-
 We allow you to add YAML front matter to all files to specify versions more
 precisely:
-
 ```toml
 # ---
 # pkgx:
 #   dependencies:
 #     openssl.org: 1.1.1n
 # ---
-
 [package]
 name = "my cargo project"
 # snip…
 ```
-
 We allow more terse expressions including eg:
-
 ```toml
 # ---
 # pkgx:
 #   dependencies: openssl.org@1.1.1n deno^2 npm
 # ---
 ```
-
 The major exception being json since it doesn’t support comments, in this case
 we read a special `pkgx` node:
-
 ```json
 {
   "pkgx": {
@@ -204,13 +148,9 @@ we read a special `pkgx` node:
   }
 }
 ```
-
 You can also make a `pkgx.yaml` file.
-
 ## Adding Custom Environment Variables
-
 You can add your own environment variables if you like:
-
 ```toml
 # ---
 # pkgx:
@@ -220,31 +160,22 @@ You can add your own environment variables if you like:
 #     MY_VAR: my-value
 # ---
 ```
-
 > [!NOTE]
 >
 > - Adding environment variables only works via the `shellcode` route.
 > - The environment variable's value is sanitized, so expressions like
 >   `MY_VAR: $(sudo rm -rf --no-preserve-root /)` will throw an error.
 > - We recommend `direnv` instead of this route.
-
 ## `dev` & Editors
-
 The sure fire way for things to work in editors is to use the `dev`/`pkgm`
 combo. Having said this most editors if opened via the Terminal will inherit
 that Terminal’s environment.
-
 ## GitHub Actions
-
 ```yaml
 - uses: pkgxdev/dev@v1
 ```
-
 Our action installs needed packages (via `pkgx`) and sets up the environment the
 same as `dev` does in your terminal.
-
 ## Contributing
-
 We use `deno`, so either install that or—you know—type `dev`.
-
 Edit [./src/sniff.ts](src/sniff.ts) to add new dev types.