diff --git a/backend/druks/durable/schemas.py b/backend/druks/durable/schemas.py
index df69efbf..a872d94b 100644
--- a/backend/druks/durable/schemas.py
+++ b/backend/druks/durable/schemas.py
@@ -132,9 +132,8 @@ def from_run(
 # takes either and is always a string.
 SubjectId = Annotated[str, BeforeValidator(str)]
 
-# The one line a board row and a detail page show a subject as. Blank is rejected
-# rather than rendered: a title nobody can read is the thing this field exists to
-# prevent.
+# The one line a board row and a detail page show a subject as; blank is
+# rejected rather than rendered.
 SubjectLabel = Annotated[str, StringConstraints(strip_whitespace=True, min_length=1)]
 
 
diff --git a/frontend/src/components/Control.tsx b/frontend/src/components/Control.tsx
index 756d3472..3f69acc4 100644
--- a/frontend/src/components/Control.tsx
+++ b/frontend/src/components/Control.tsx
@@ -6,10 +6,8 @@ import type {
   TextareaHTMLAttributes,
 } from 'react'
 
-// The control frames the shell draws, as components. Omitting ``className`` is
-// the point: the class name stops being a contract typed by hand, so it can be
-// renamed without breaking a caller. Layout stays the page's — position a
-// control from the parent's own rules, not by passing it a class.
+// Dropping ``className`` is the point: the class name stops being a contract
+// callers type by hand. Position a control from the parent's own rules.
 type Bare<P> = Omit<P, 'className'>
 
 export function TextInput(props: Bare<InputHTMLAttributes<HTMLInputElement>>) {
@@ -29,7 +27,6 @@ interface ButtonProps extends Bare<ButtonHTMLAttributes<HTMLButtonElement>> {
 }
 
 export function Button({ variant = 'ghost', ...props }: ButtonProps) {
-  // ``type`` ahead of the spread so a form's submit button can override it.
   return <button type="button" {...props} className={`set-btn ${variant}`} />
 }
 
@@ -40,8 +37,7 @@ interface FieldProps {
   children?: ReactNode
 }
 
-// A labelled control with its help and error lines. Every slot is optional, so
-// a bare <Field error={…} /> is the error line on its own.
+// Every slot is optional: a bare <Field error={…} /> is the error line alone.
 export function Field({ label, help, error, children }: FieldProps) {
   return (
     <div className="set-field">
diff --git a/frontend/src/components/SettingField.tsx b/frontend/src/components/SettingField.tsx
index da2e6afb..dc898c3e 100644
--- a/frontend/src/components/SettingField.tsx
+++ b/frontend/src/components/SettingField.tsx
@@ -1,20 +1,17 @@
 import { CronField } from './CronField'
 import { Field, Select, Textarea, TextInput } from './Control'
 
-// One declared field, rendered from its kind. Both places that draw a declared
-// field go through here: the settings panes and a service's connect form, which
-// speak the same field vocabulary on the wire.
+// One declared field, rendered from its kind — the settings panes and a
+// service's connect form both draw through here.
 interface SettingFieldProps {
   label: string
   help?: string
-  // The wire's field kind: str | int | bool | enum | secret | cron. ``bool`` is
-  // not drawn here — a toggle is a row, not a labelled control, so the panes
-  // pull those out and render them as switches.
+  // str | int | bool | enum | secret | cron. ``bool`` is not drawn here: a
+  // toggle is a row, not a labelled control, so the panes pull those out.
   type: string
   choices?: string[] | null
   multiline?: boolean
-  // For a secret: whether one is already stored. The value itself never leaves
-  // the backend, so the box shows set-ness and takes a replacement.
+  // Whether a secret is already stored; the value itself never leaves the server.
   secretSet?: boolean | null
   value: string
   onChange: (next: string) => void
@@ -43,8 +40,7 @@ function FieldControl({
   disabled,
 }: ControlProps) {
   if (type === 'enum') {
-    // An enum without its choice set is a broken declaration, not a text field —
-    // say so rather than drawing a box that silently accepts anything.
+    // A broken declaration, not a text field: say so rather than accept anything.
     if (!choices?.length) {
       return <span className="set-field-error">{label} declares no choices</span>
     }
diff --git a/frontend/src/components/StatusGlyph.tsx b/frontend/src/components/StatusGlyph.tsx
index 162d1f9b..e903f68b 100644
--- a/frontend/src/components/StatusGlyph.tsx
+++ b/frontend/src/components/StatusGlyph.tsx
@@ -6,9 +6,7 @@ interface Props {
   size?: number
 }
 
-// A run that is still going anywhere pulses: it is moving, or it is waiting on
-// you. The rule lives here rather than on a ``pulse`` prop, so every board
-// reads the same state the same way.
+// Here rather than on a prop, so every board reads the same state the same way.
 const PULSING: RunState[] = ['scheduled', 'running', 'parked']
 
 export function StatusGlyph({ state, size = 10 }: Props) {
diff --git a/frontend/src/runtime/druks-ui.test.ts b/frontend/src/runtime/druks-ui.test.ts
index 2b9046f5..1290e3a4 100644
--- a/frontend/src/runtime/druks-ui.test.ts
+++ b/frontend/src/runtime/druks-ui.test.ts
@@ -2,12 +2,8 @@ import { describe, expect, it } from 'vitest'
 
 import * as ui from './druks-ui'
 
-// The lent frontend surface, pinned by exact equality — the twin of
-// backend/tests/test_author_surface.py. Every name here is public to every
-// installed app, forever: an app built against it keeps importing it, and
-// removing one rejects that app's entry.js at link time.
-//
-// Red means stop and ask. Never edit the list to match the code.
+// The twin of backend/tests/test_author_surface.py. Red means stop and ask —
+// never edit the list to match the code.
 const LENT = [
   'Button',
   'CancelRun',
diff --git a/frontend/src/runtime/druks-ui.ts b/frontend/src/runtime/druks-ui.ts
index a2e09615..c42ee980 100644
--- a/frontend/src/runtime/druks-ui.ts
+++ b/frontend/src/runtime/druks-ui.ts
@@ -1,12 +1,6 @@
-// Import-map target for the bare specifier '@druks/ui' — the shell components an
-// installed dist app borrows, so an app draws the shell's chrome instead of
-// retyping it (see vite.config.ts). Bundled extensions import the same specifier
-// through resolve.alias, which keeps the lent surface exercised by the shell's
-// own build and typecheck.
-//
-// This export list IS the contract. druks-ui.test.ts pins it by exact equality:
-// a name added here is public to every installed app, forever. Everything here
-// must render without a provider — an app mounts it outside the shell's tree.
+// Import-map target for '@druks/ui' (see vite.config.ts). This export list is
+// the contract: a name added here is public to every installed app, forever, and
+// must render without a provider.
 export { Page } from '../components/Page'
 export { PageHeader } from '../components/PageHeader'
 export { SectionHead } from '../components/Common'
@@ -14,9 +8,6 @@ export { EmptyState } from '../components/EmptyState'
 export { StatusGlyph } from '../components/StatusGlyph'
 export { RelTime } from '../components/RelTime'
 export { Button, Field, Select, TextInput } from '../components/Control'
-// A run's operator actions. Gates are a platform pillar, so an app that ships a
-// frontend has to be able to draw one — it loses the generic subject page that
-// would otherwise carry it.
 export { CancelRun, InAppReview, RetryRun } from '../components/RunControls'
 
 export type { InputRequest, RunState } from '../api/types'
diff --git a/frontend/src/styles.css b/frontend/src/styles.css
index a2230502..30b918e3 100644
--- a/frontend/src/styles.css
+++ b/frontend/src/styles.css
@@ -108,9 +108,8 @@ body[data-palette="mono"] {
   --accent-violet: var(--text);
 }
 
-/* The interactive accent every control reads. Declared on ``body``, not
-   ``:root``: the palettes retint --bucket-run on body[data-palette], and a
-   :root declaration would resolve against the base hue and skip them. */
+/* On ``body``, not ``:root``: the palettes retint --bucket-run on
+   body[data-palette], which a :root declaration would resolve past. */
 body { --accent: var(--bucket-run); }
 
 * { box-sizing: border-box; }
diff --git a/frontend/vite.config.ts b/frontend/vite.config.ts
index 97d4beef..579fc96a 100644
--- a/frontend/vite.config.ts
+++ b/frontend/vite.config.ts
@@ -14,10 +14,8 @@ const repoDist = fileURLToPath(
 // document. In a build the shims are extra entries — hashed like any asset,
 // with their shared code in the common chunks — and the import map (regenerated
 // into index.html per build) carries the hashed names. In dev the Vite server
-// serves the shim sources directly.
-//
-// Values carry their extension: the React shims are hand-written .js, while
-// @druks/ui is .ts because it re-exports the shell's .tsx components.
+// serves the shim sources directly. Values carry their extension: the React
+// shims are .js, @druks/ui is .ts because it re-exports .tsx.
 const SHARED_MODULES: Record<string, string> = {
   react: 'react.js',
   'react-dom': 'react-dom.js',
@@ -30,10 +28,8 @@ const shimUrl = (file: string) => new URL(`./src/runtime/${file}`, import.meta.u
 // The rollup entry name for a shim, and what transformIndexHtml matches on.
 const shimEntry = (file: string) => `runtime-${file.replace(/\.[jt]s$/, '')}`
 
-// Bundled extensions import '@druks/ui' exactly as an installed app does, so a
-// breaking change to the lent surface reddens the shell's own build, typecheck
-// and tests before it can reach an app. Exported because vitest.config.ts needs
-// the same alias and this is where it is decided.
+// Bundled extensions import '@druks/ui' as an installed app does, so breaking
+// the lent surface reddens the shell's own build first. Exported for vitest.
 export const shellAlias = {
   '@druks/ui': fileURLToPath(shimUrl(SHARED_MODULES['@druks/ui']!)),
 }