--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.dependency-cruiser.js	Fri May 05 21:22:35 2023 -0700
@@ -0,0 +1,449 @@
+/** @type {import('dependency-cruiser').IConfiguration} */
+module.exports = {
+  forbidden: [
+    /* rules from the 'recommended' preset: */
+    {
+      name: 'no-circular',
+      severity: 'warn',
+      comment:
+        'This dependency is part of a circular relationship. You might want to revise ' +
+        'your solution (i.e. use dependency inversion, make sure the modules have a single responsibility) ',
+      from: {},
+      to: {
+        circular: true
+      }
+    },
+    {
+      name: 'no-orphans',
+      comment:
+        "This is an orphan module - it's likely not used (anymore?). Either use it or " +
+        "remove it. If it's logical this module is an orphan (i.e. it's a config file), " +
+        "add an exception for it in your dependency-cruiser configuration. By default " +
+        "this rule does not scrutinize dot-files (e.g. .eslintrc.js), TypeScript declaration " +
+        "files (.d.ts), tsconfig.json and some of the babel and webpack configs.",
+      severity: 'warn',
+      from: {
+        orphan: true,
+        pathNot: [
+          '(^|/)\\.[^/]+\\.(js|cjs|mjs|ts|json)$', // dot files
+          '\\.d\\.ts$',                            // TypeScript declaration files
+          '(^|/)tsconfig\\.json$',                 // TypeScript config
+          '(^|/)(babel|webpack)\\.config\\.(js|cjs|mjs|ts|json)$' // other configs
+        ]
+      },
+      to: {},
+    },
+    {
+      name: 'no-deprecated-core',
+      comment:
+        'A module depends on a node core module that has been deprecated. Find an alternative - these are ' +
+        "bound to exist - node doesn't deprecate lightly.",
+      severity: 'warn',
+      from: {},
+      to: {
+        dependencyTypes: [
+          'core'
+        ],
+        path: [
+          '^(v8\/tools\/codemap)$',
+          '^(v8\/tools\/consarray)$',
+          '^(v8\/tools\/csvparser)$',
+          '^(v8\/tools\/logreader)$',
+          '^(v8\/tools\/profile_view)$',
+          '^(v8\/tools\/profile)$',
+          '^(v8\/tools\/SourceMap)$',
+          '^(v8\/tools\/splaytree)$',
+          '^(v8\/tools\/tickprocessor-driver)$',
+          '^(v8\/tools\/tickprocessor)$',
+          '^(node-inspect\/lib\/_inspect)$',
+          '^(node-inspect\/lib\/internal\/inspect_client)$',
+          '^(node-inspect\/lib\/internal\/inspect_repl)$',
+          '^(async_hooks)$',
+          '^(punycode)$',
+          '^(domain)$',
+          '^(constants)$',
+          '^(sys)$',
+          '^(_linklist)$',
+          '^(_stream_wrap)$'
+        ],
+      }
+    },
+    {
+      name: 'not-to-deprecated',
+      comment:
+        'This module uses a (version of an) npm module that has been deprecated. Either upgrade to a later ' +
+        'version of that module, or find an alternative. Deprecated modules are a security risk.',
+      severity: 'warn',
+      from: {},
+      to: {
+        dependencyTypes: [
+          'deprecated'
+        ]
+      }
+    },
+    {
+      name: 'no-non-package-json',
+      severity: 'error',
+      comment:
+        "This module depends on an npm package that isn't in the 'dependencies' section of your package.json. " +
+        "That's problematic as the package either (1) won't be available on live (2 - worse) will be " +
+        "available on live with an non-guaranteed version. Fix it by adding the package to the dependencies " +
+        "in your package.json.",
+      from: {},
+      to: {
+        dependencyTypes: [
+          'npm-no-pkg',
+          'npm-unknown'
+        ]
+      }
+    },
+    {
+      name: 'not-to-unresolvable',
+      comment:
+        "This module depends on a module that cannot be found ('resolved to disk'). If it's an npm " +
+        'module: add it to your package.json. In all other cases you likely already know what to do.',
+      severity: 'error',
+      from: {},
+      to: {
+        couldNotResolve: true
+      }
+    },
+    {
+      name: 'no-duplicate-dep-types',
+      comment:
+        "Likely this module depends on an external ('npm') package that occurs more than once " +
+        "in your package.json i.e. bot as a devDependencies and in dependencies. This will cause " +
+        "maintenance problems later on.",
+      severity: 'warn',
+      from: {},
+      to: {
+        moreThanOneDependencyType: true,
+        // as it's pretty common to have a type import be a type only import 
+        // _and_ (e.g.) a devDependency - don't consider type-only dependency
+        // types for this rule
+        dependencyTypesNot: ["type-only"]
+      }
+    },
+
+    /* rules you might want to tweak for your specific situation: */
+    {
+      name: 'not-to-spec',
+      comment:
+        'This module depends on a spec (test) file. The sole responsibility of a spec file is to test code. ' +
+        "If there's something in a spec that's of use to other modules, it doesn't have that single " +
+        'responsibility anymore. Factor it out into (e.g.) a separate utility/ helper or a mock.',
+      severity: 'error',
+      from: {},
+      to: {
+        path: '\\.(spec|test)\\.(js|mjs|cjs|ts|ls|coffee|litcoffee|coffee\\.md)$'
+      }
+    },
+    {
+      name: 'not-to-dev-dep',
+      severity: 'error',
+      comment:
+        "This module depends on an npm package from the 'devDependencies' section of your " +
+        'package.json. It looks like something that ships to production, though. To prevent problems ' +
+        "with npm packages that aren't there on production declare it (only!) in the 'dependencies'" +
+        'section of your package.json. If this module is development only - add it to the ' +
+        'from.pathNot re of the not-to-dev-dep rule in the dependency-cruiser configuration',
+      from: {
+        path: '^(src)',
+        pathNot: '\\.(spec|test)\\.(js|mjs|cjs|ts|ls|coffee|litcoffee|coffee\\.md)$'
+      },
+      to: {
+        dependencyTypes: [
+          'npm-dev'
+        ]
+      }
+    },
+    {
+      name: 'optional-deps-used',
+      severity: 'info',
+      comment:
+        "This module depends on an npm package that is declared as an optional dependency " +
+        "in your package.json. As this makes sense in limited situations only, it's flagged here. " +
+        "If you're using an optional dependency here by design - add an exception to your" +
+        "dependency-cruiser configuration.",
+      from: {},
+      to: {
+        dependencyTypes: [
+          'npm-optional'
+        ]
+      }
+    },
+    {
+      name: 'peer-deps-used',
+      comment:
+        "This module depends on an npm package that is declared as a peer dependency " +
+        "in your package.json. This makes sense if your package is e.g. a plugin, but in " +
+        "other cases - maybe not so much. If the use of a peer dependency is intentional " +
+        "add an exception to your dependency-cruiser configuration.",
+      severity: 'warn',
+      from: {},
+      to: {
+        dependencyTypes: [
+          'npm-peer'
+        ]
+      }
+    }
+  ],
+  options: {
+
+    /* conditions specifying which files not to follow further when encountered:
+       - path: a regular expression to match
+       - dependencyTypes: see https://github.com/sverweij/dependency-cruiser/blob/master/doc/rules-reference.md#dependencytypes-and-dependencytypesnot
+       for a complete list
+    */
+    doNotFollow: {
+      path: 'node_modules'
+    },
+
+    /* conditions specifying which dependencies to exclude
+       - path: a regular expression to match
+       - dynamic: a boolean indicating whether to ignore dynamic (true) or static (false) dependencies.
+          leave out if you want to exclude neither (recommended!)
+    */
+    exclude : {
+      path: '.*\.test\.ts',
+    //   dynamic: true
+    },
+
+    /* pattern specifying which files to include (regular expression)
+       dependency-cruiser will skip everything not matching this pattern
+    */
+    // includeOnly : '',
+
+    /* dependency-cruiser will include modules matching against the focus
+       regular expression in its output, as well as their neighbours (direct
+       dependencies and dependents)
+    */
+    // focus : '',
+
+    /* list of module systems to cruise */
+    // moduleSystems: ['amd', 'cjs', 'es6', 'tsd'],
+
+    /* prefix for links in html and svg output (e.g. 'https://github.com/you/yourrepo/blob/develop/'
+       to open it on your online repo or `vscode://file/${process.cwd()}/` to 
+       open it in visual studio code),
+     */
+    // prefix: '',
+
+    /* false (the default): ignore dependencies that only exist before typescript-to-javascript compilation
+       true: also detect dependencies that only exist before typescript-to-javascript compilation
+       "specify": for each dependency identify whether it only exists before compilation or also after
+     */
+    tsPreCompilationDeps: true,
+    
+    /* 
+       list of extensions to scan that aren't javascript or compile-to-javascript. 
+       Empty by default. Only put extensions in here that you want to take into
+       account that are _not_ parsable. 
+    */
+    // extraExtensionsToScan: [".json", ".jpg", ".png", ".svg", ".webp"],
+
+    /* if true combines the package.jsons found from the module up to the base
+       folder the cruise is initiated from. Useful for how (some) mono-repos
+       manage dependencies & dependency definitions.
+     */
+    // combinedDependencies: false,
+
+    /* if true leave symlinks untouched, otherwise use the realpath */
+    // preserveSymlinks: false,
+
+    /* TypeScript project file ('tsconfig.json') to use for
+       (1) compilation and
+       (2) resolution (e.g. with the paths property)
+
+       The (optional) fileName attribute specifies which file to take (relative to
+       dependency-cruiser's current working directory). When not provided
+       defaults to './tsconfig.json'.
+     */
+    tsConfig: {
+      fileName: 'tsconfig.json'
+    },
+
+    /* Webpack configuration to use to get resolve options from.
+
+       The (optional) fileName attribute specifies which file to take (relative
+       to dependency-cruiser's current working directory. When not provided defaults
+       to './webpack.conf.js'.
+
+       The (optional) `env` and `arguments` attributes contain the parameters to be passed if
+       your webpack config is a function and takes them (see webpack documentation
+       for details)
+     */
+    // webpackConfig: {
+    //  fileName: './webpack.config.js',
+    //  env: {},
+    //  arguments: {},
+    // },
+
+    /* Babel config ('.babelrc', '.babelrc.json', '.babelrc.json5', ...) to use
+      for compilation (and whatever other naughty things babel plugins do to
+      source code). This feature is well tested and usable, but might change
+      behavior a bit over time (e.g. more precise results for used module 
+      systems) without dependency-cruiser getting a major version bump.
+     */
+    // babelConfig: {
+    //   fileName: './.babelrc'
+    // },
+
+    /* List of strings you have in use in addition to cjs/ es6 requires
+       & imports to declare module dependencies. Use this e.g. if you've
+       re-declared require, use a require-wrapper or use window.require as
+       a hack.
+    */
+    // exoticRequireStrings: [],
+    /* options to pass on to enhanced-resolve, the package dependency-cruiser
+       uses to resolve module references to disk. You can set most of these
+       options in a webpack.conf.js - this section is here for those
+       projects that don't have a separate webpack config file.
+
+       Note: settings in webpack.conf.js override the ones specified here.
+     */
+    enhancedResolveOptions: {
+      /* List of strings to consider as 'exports' fields in package.json. Use
+         ['exports'] when you use packages that use such a field and your environment
+         supports it (e.g. node ^12.19 || >=14.7 or recent versions of webpack).
+
+         If you have an `exportsFields` attribute in your webpack config, that one
+         will have precedence over the one specified here.
+      */ 
+      exportsFields: ["exports"],
+      /* List of conditions to check for in the exports field. e.g. use ['imports']
+         if you're only interested in exposed es6 modules, ['require'] for commonjs,
+         or all conditions at once `(['import', 'require', 'node', 'default']`)
+         if anything goes for you. Only works when the 'exportsFields' array is
+         non-empty.
+
+        If you have a 'conditionNames' attribute in your webpack config, that one will
+        have precedence over the one specified here.
+      */
+      conditionNames: ["import", "require", "node", "default"],
+      /*
+         The extensions, by default are the same as the ones dependency-cruiser
+         can access (run `npx depcruise --info` to see which ones that are in
+         _your_ environment. If that list is larger than what you need (e.g. 
+         it contains .js, .jsx, .ts, .tsx, .cts, .mts - but you don't use 
+         TypeScript you can pass just the extensions you actually use (e.g. 
+         [".js", ".jsx"]). This can speed up the most expensive step in 
+         dependency cruising (module resolution) quite a bit.
+       */
+      // extensions: [".js", ".jsx", ".ts", ".tsx", ".d.ts"],
+      /* 
+         If your TypeScript project makes use of types specified in 'types'
+         fields in package.jsons of external dependencies, specify "types"
+         in addition to "main" in here, so enhanced-resolve (the resolver
+         dependency-cruiser uses) knows to also look there. You can also do
+         this if you're not sure, but still use TypeScript. In a future version
+         of dependency-cruiser this will likely become the default.
+       */
+      mainFields: ["main", "types"],
+    },
+    reporterOptions: {
+      dot: {
+        /* pattern of modules that can be consolidated in the detailed
+           graphical dependency graph. The default pattern in this configuration
+           collapses everything in node_modules to one folder deep so you see
+           the external modules, but not the innards your app depends upon.
+         */
+        collapsePattern: 'node_modules/(@[^/]+/[^/]+|[^/]+)',
+
+        /* Options to tweak the appearance of your graph.See
+           https://github.com/sverweij/dependency-cruiser/blob/master/doc/options-reference.md#reporteroptions
+           for details and some examples. If you don't specify a theme
+           don't worry - dependency-cruiser will fall back to the default one.
+        */
+        // theme: {
+        //   graph: {
+        //     /* use splines: "ortho" for straight lines. Be aware though
+        //       graphviz might take a long time calculating ortho(gonal)
+        //       routings.
+        //    */
+        //     splines: "true"
+        //   },
+        //   modules: [
+        //     {
+        //       criteria: { matchesFocus: true },
+        //       attributes: {
+        //         fillcolor: "lime",
+        //         penwidth: 2,
+        //       },
+        //     },
+        //     {
+        //       criteria: { matchesFocus: false },
+        //       attributes: {
+        //         fillcolor: "lightgrey",
+        //       },
+        //     },
+        //     {
+        //       criteria: { matchesReaches: true },
+        //       attributes: {
+        //         fillcolor: "lime",
+        //         penwidth: 2,
+        //       },
+        //     },
+        //     {
+        //       criteria: { matchesReaches: false },
+        //       attributes: {
+        //         fillcolor: "lightgrey",
+        //       },
+        //     },
+        //     {
+        //       criteria: { source: "^src/model" },
+        //       attributes: { fillcolor: "#ccccff" }
+        //     },
+        //     {
+        //       criteria: { source: "^src/view" },
+        //       attributes: { fillcolor: "#ccffcc" }
+        //     },
+        //   ],
+        //   dependencies: [
+        //     {
+        //       criteria: { "rules[0].severity": "error" },
+        //       attributes: { fontcolor: "red", color: "red" }
+        //     },
+        //     {
+        //       criteria: { "rules[0].severity": "warn" },
+        //       attributes: { fontcolor: "orange", color: "orange" }
+        //     },
+        //     {
+        //       criteria: { "rules[0].severity": "info" },
+        //       attributes: { fontcolor: "blue", color: "blue" }
+        //     },
+        //     {
+        //       criteria: { resolved: "^src/model" },
+        //       attributes: { color: "#0000ff77" }
+        //     },
+        //     {
+        //       criteria: { resolved: "^src/view" },
+        //       attributes: { color: "#00770077" }
+        //     }
+        //   ]
+        // }
+      },
+      archi: {
+        /* pattern of modules that can be consolidated in the high level
+          graphical dependency graph. If you use the high level graphical
+          dependency graph reporter (`archi`) you probably want to tweak
+          this collapsePattern to your situation.
+        */
+        collapsePattern: '^(packages|src|lib|app|bin|test(s?)|spec(s?))/[^/]+|node_modules/(@[^/]+/[^/]+|[^/]+)',
+
+        /* Options to tweak the appearance of your graph.See
+           https://github.com/sverweij/dependency-cruiser/blob/master/doc/options-reference.md#reporteroptions
+           for details and some examples. If you don't specify a theme
+           for 'archi' dependency-cruiser will use the one specified in the
+           dot section (see above), if any, and otherwise use the default one.
+         */
+        // theme: {
+        // },
+      },
+      "text": {
+        "highlightFocused": true
+      },
+    }
+  }
+};
+// generated: dependency-cruiser@12.12.0 on 2023-05-05T19:06:19.143Z

--- a/.hgignore	Sun Mar 20 16:40:51 2022 -0700
+++ b/.hgignore	Fri May 05 21:22:35 2023 -0700
@@ -7,3 +7,4 @@
 .vscode/settings.json
 types/
 dist/
+deps.svg

--- a/package.json	Sun Mar 20 16:40:51 2022 -0700
+++ b/package.json	Fri May 05 21:22:35 2023 -0700
@@ -27,6 +27,7 @@
   },
   "devDependencies": {
     "@types/jest": "^27.4.0",
+    "dependency-cruiser": "^12.12.0",
     "jest": "^27.5.1",
     "stylus": "^0.56.0",
     "ts-jest": "^27.1.3",

--- a/tasks.py	Sun Mar 20 16:40:51 2022 -0700
+++ b/tasks.py	Fri May 05 21:22:35 2023 -0700
@@ -1,3 +1,4 @@
+import os
 from invoke import task  # pytype: disable=import-error
 
 
@@ -32,4 +33,9 @@
 
 @task
 def dev(ctx):
-    ctx.run('pnpm dev')
\ No newline at end of file
+    ctx.run('pnpm dev')
+
+@task
+def deps(ctx):
+    ctx.run('node_modules/.bin/depcruise --config .dependency-cruiser.js -T dot src | dot -Tsvg > deps.svg')
+    print(f"browse to file://{os.path.abspath('deps.svg')}")
\ No newline at end of file