Implement the following plan:

Connected Sidenotes + Footnote Positioning Fix

Overview

Redesign sidenotes so they connect to specific underlined text in the reading. On wide screens, sidenotes appear in the margins with the anchor text underlined. On narrow screens, sidenotes are hidden and the underlined text acts as a hover/click trigger (like a footnote) showing a popover. Also fix footnote tooltips to open downward when near the top of the viewport.

MDX Authoring Format

Sidenote definition — block-level, with an id prop:

<Sidenote id="thesis">
McLuhan's opening argument is the thesis of the entire book...
</Sidenote>

Anchor in text — markdown link with sn: prefix (not a real URI, can't be confused with a link):

In a culture like ours, long accustomed to [splitting and dividing all things](sn:thesis) as a means of control...

Sidenotes without anchors — still supported (no id prop, no anchor link). These render as margin notes on wide screens and inline asides on narrow screens, as they do now. Used for the reading-tips sidenote at the top.

Architecture

New: SidenoteProvider (client context)

File: apps/web/components/mdx/sidenote-provider.tsx

• Wraps article content (added in prose.tsx alongside FootnoteProvider)
• Holds a Map<string, ReactNode> of sidenote content by ID
• Exposes registerSidenote(id, content) and getSidenoteContent(id) via context
• Components use useSidenote(id) hook to retrieve content

Modified: Sidenote component (becomes client component)

File: apps/web/components/mdx/sidenote.tsx

• Accepts optional id prop
• If id provided: registers children into SidenoteProvider context on mount
• Wide screens (xl+): renders as margin float (current CSS behavior)
• Narrow screens (<xl): if has id, renders display: none (content shown via anchor popover). If no id, renders as inline bordered aside (current fallback)

New: SidenoteRef component (client component)

File: apps/web/components/mdx/sidenote-ref.tsx

• Renders underlined anchor text (dotted accent underline)
• Wide screens: decorative underline only (sidenote visible in margin nearby)
• Narrow screens: hover/click shows popover with sidenote content (read from context)
• Popover positioning: below by default, above if near bottom of viewport (reuse logic from footnote fix)
• Close on click outside, Escape key

Modified: mdx-components.tsx a override

Add sn: prefix detection before existing link handling:

if (href?.startsWith("sn:")) {
  const sidenoteId = href.slice(3);
  return <SidenoteRef id={sidenoteId}>{children}</SidenoteRef>;
}

Modified: prose.tsx

Wrap FootnoteProvider children in SidenoteProvider:

<FootnoteProvider>
  <SidenoteProvider>{children}</SidenoteProvider>
</FootnoteProvider>

Modified: Footnote component

File: apps/web/components/mdx/footnote.tsx

• Check buttonRef.current.getBoundingClientRect().top when showing tooltip
• If top < 200px: position tooltip below (top-full mt-2) instead of above (bottom-full mb-2)
• Same close-on-outside-click and Escape behavior

CSS updates

File: apps/web/styles/globals.css

Keep existing XL+ margin positioning (alternating left/right floats, max-height, expand on hover). Add:

/* Anchor underline styling */
.sidenote-ref {
  text-decoration: underline;
  text-decoration-style: dotted;
  text-decoration-color: var(--accent);
  text-underline-offset: 3px;
  text-decoration-thickness: 1.5px;
}

/* Narrow screens: connected sidenotes hidden (shown via popover) */
@media (max-width: 1279px) {
  .sidenote[data-sidenote-id] {
    display: none;
  }
  .sidenote-ref {
    cursor: help;
  }
}

MDX Content Update

Update content/spring2026/readings/understanding-media-ch1.mdx:

• Add id props to all <Sidenote> blocks that have corresponding anchor text
• Add [anchor text](sn:id) markers in the prose for each connected sidenote
• Keep the first sidenote (reading tips) without an id — it's a general note, not connected to specific text

Example transformation:

<!-- Before -->
The restructuring of human work and association was shaped by the technique
of fragmentation that is the essence of machine technology.

<Sidenote>
McLuhan's opening argument is the thesis of the entire book...
</Sidenote>

<!-- After -->
The restructuring of human work and association was shaped by the
[technique of fragmentation](sn:thesis) that is the essence of machine technology.

<Sidenote id="thesis">
McLuhan's opening argument is the thesis of the entire book...
</Sidenote>

Files to create/modify

Verification

1. bun run tsc + bun run lint — no errors
2. Wide screen: sidenotes in alternating margins, anchor text underlined with dotted accent line, sidenotes truncated with expand on hover
3. Narrow screen: sidenotes hidden, underlined text shows popover on hover/click with sidenote content
4. Sidenotes without id (reading tips): render as margin note on wide, inline aside on narrow
5. Footnotes: open below when near top of screen, above when near bottom
6. Popover closes on outside click and Escape

If you need specific details from before exiting plan mode (like exact code snippets, error messages, or content you generated), read the full transcript at: ~/.claude/projects/-Users-challen-www-usingandunderstanding-ai/0baa8e5c-a085-4550-90f0-29377f926bac.jsonl

OK! Looking better. A few notes. First, when I hover over the outline for a Sidenote anchor, let's open it just like when I hover over it in full-width mode. Second, the footnote numbering is broken. When I hover they keep increasing! :-) Otherwise this is coming along nicely.

Some footnotes are sneaking through into the main text: ^[E. H. Gombrich (1909-2001), art historian whose Art and Illusion (1960) analyzed how we perceive and interpret images.]

We actually want to make sure that footnote contents also support Markdown. I'm pretty sure I got that to work in ../geoffreychallen.com, so you might look there for inspiration.

Sorry, more footnote problems: ^[McLuhan uses Narcissus throughout the book — not as vanity, but as numbness. In the myth, Narcissus was paralyzed by his own reflection, unable to recognize it as an extension of himself. McLuhan argues we are similarly numb to our own technological extensions.]

I restarted the server but do not see the change. Examine: https://[local-hostname]/spring2026/readings/understanding-media-ch1.

Can we use an e2e test for this?

This session is being continued from a previous conversation that ran out of context. The summary below covers the earlier portion of the conversation.

Analysis: Let me go through the conversation chronologically to capture all important details.

1. Initial Plan Implementation: The user provided a detailed plan for implementing connected sidenotes + footnote positioning fix. The plan included:

   • New SidenoteProvider context
   • New SidenoteRef component
   • Modified Sidenote component with id prop
   • Modified Footnote with smart positioning
   • Modified prose.tsx and mdx-components.tsx
   • CSS updates
   • MDX content updates with sidenote anchors

2. First Implementation Round: I created/modified all the files according to the plan. Key files:

   • Created sidenote-provider.tsx - context with Map for sidenote content
   • Created sidenote-ref.tsx - anchor text with popover
   • Modified sidenote.tsx - added id prop, register into context
   • Modified footnote.tsx - smart top/bottom positioning
   • Modified prose.tsx - wrapped in SidenoteProvider
   • Modified mdx-components.tsx - added sn: href detection
   • Modified globals.css - added sidenote-ref styles and narrow-screen hiding
   • Modified understanding-media-ch1.mdx - added ids and anchor markers to 16 sidenotes
   • Fixed lint error: ternary expression in sidenote-ref.tsx

3. User Feedback Round 1: User said:

   • "When I hover over the outline for a Sidenote anchor, let's open it just like when I hover over it in full-width mode"
   • "The footnote numbering is broken. When I hover they keep increasing!"

4. Fixes for Round 1:

   • Footnote numbering: Changed useFootnoteIndex to use useState(() => ctx?.getNextIndex() ?? 0) to capture index once
   • Sidenote anchor hover: Added hoveredId/setHoveredId to SidenoteProvider context, SidenoteRef sets it on hover, Sidenote applies sidenote-hover class, CSS expanded to include .sidenote-hover alongside :hover

5. User Feedback Round 2: User reported footnotes "sneaking through" as raw text, specifically ^[E. H. Gombrich...] and wanted Markdown support in footnotes

6. Footnote Markdown Support Attempt 1: Rewrote remark-inline-footnotes.mjs to scan across sibling AST nodes when ^[...] spans multiple nodes (due to emphasis parsing splitting them). The plugin was rewritten to:

   • Visit all nodes with children (not just text nodes)
   • Scan across sibling nodes for matching ]
   • Collect text, emphasis, link nodes as footnote children

7. User Feedback Round 3: Still seeing broken footnotes - ^[McLuhan uses Narcissus...] showing as raw text. User noted "Quite a few are not being parsed properly" and "I see some of them though. It's weird."

8. Footnote Markdown Support Attempt 2: Realized the fundamental issue is that the Markdown parser runs BEFORE any remark plugin, so ^[content with *emphasis*] gets split across AST nodes unpredictably. The remark-level approach is inherently fragile.

   Solution: Replace the remark plugin with a webpack pre-loader (mdx-footnote-loader.cjs) that converts ^[...] to <Footnote>...</Footnote> in raw MDX source BEFORE the MDX parser runs. This way:

   • Bracket matching happens on raw string (reliable)
   • MDX parser sees JSX tags and parses Markdown inside naturally
   • Handles code blocks and inline code spans

9. E2E Test: User asked "Can we use an e2e test for this?" to verify the footnote rendering. I created:

   • testing/e2e/tests/reading-footnotes.spec.ts - tests using auth fixture
   • Added reading-footnotes project to playwright config

10. E2E Test Result: The test FAILED, revealing that ^[ markers are still appearing in the rendered page text. The test output shows many footnotes rendered correctly (no ^[ visible) but some still breaking through as raw text, specifically near the end of the document. Examples from test output:

    • Professor J. U. Nef^[John U. Nef (1899-1988)...]
    • C. G. Jung:^[Carl Jung (1875-1961)...]

This confirms the webpack pre-loader approach is NOT working as expected. The enforce: "pre" webpack rule may not be running before the MDX loader, OR there's a caching issue, OR the loader isn't being applied to the MDX files at all.

Key files in their current state:

• apps/web/lib/mdx-footnote-loader.cjs - NEW webpack pre-loader (may not be working)
• apps/web/lib/remark-inline-footnotes.mjs - OLD remark plugin (still on disk but removed from config)
• apps/web/next.config.ts - Removed remark plugin, added webpack pre-loader with enforce: "pre"
• The old remark plugin is still on disk but not referenced in config

The test clearly shows that the webpack loader is NOT processing all the footnotes. Some work (plain text ones from the original remark plugin that may be cached) and some don't (ones with emphasis or ones not cached).

Summary:

1. Primary Request and Intent:

   • Implement connected sidenotes that link to specific underlined text in readings, with margin display on wide screens and popover on narrow screens
   • Fix footnote tooltips to open downward when near the top of the viewport
   • Fix footnote numbering bug (numbers incrementing on hover)
   • Make sidenote anchors trigger sidenote expansion on hover (wide screens)
   • Enable Markdown support inside ^[...] footnotes (emphasis, links, etc.)
   • Create an e2e test to verify footnote rendering
   • The user's most recent request was to use an e2e test to verify the footnote/reading page behavior

2. Key Technical Concepts:

   • MDX component rendering pipeline (remark plugins → rehype plugins → React components)
   • Webpack pre-loaders with enforce: "pre" for preprocessing MDX before the MDX parser
   • React Context pattern for sidenote registry (SidenoteProvider)
   • useState for stable footnote index capture (avoiding re-increment on re-renders)
   • CSS-based sidenote margin positioning with float left/right alternation
   • Playwright e2e testing with authenticated sessions via fixture pattern
   • The fundamental issue: Markdown parser runs BEFORE remark plugins, splitting ^[content with *emphasis*] across AST nodes

3. Files and Code Sections:

   • apps/web/components/mdx/sidenote-provider.tsx (CREATED)

     • React context holding sidenote content map + hover state

     "use client";
     import { createContext, useContext, useRef, useCallback, useState, type ReactNode } from "react";
     
     interface SidenoteContextValue {
       registerSidenote: (id: string, content: ReactNode) => void;
       getSidenoteContent: (id: string) => ReactNode | undefined;
       hoveredId: string | null;
       setHoveredId: (id: string | null) => void;
     }
     
     const SidenoteContext = createContext<SidenoteContextValue | null>(null);
     
     export function useSidenote(id: string): ReactNode | undefined {
       const ctx = useContext(SidenoteContext);
       if (!ctx) return undefined;
       return ctx.getSidenoteContent(id);
     }
     
     export function useSidenoteRegister(): ((id: string, content: ReactNode) => void) | null {
       const ctx = useContext(SidenoteContext);
       if (!ctx) return null;
       return ctx.registerSidenote;
     }
     
     export function useSidenoteHover(): {
       hoveredId: string | null;
       setHoveredId: (id: string | null) => void;
     } {
       const ctx = useContext(SidenoteContext);
       return {
         hoveredId: ctx?.hoveredId ?? null,
         setHoveredId: ctx?.setHoveredId ?? (() => {}),
       };
     }
     
     export function SidenoteProvider({ children }: { children: ReactNode }) {
       const mapRef = useRef<Map<string, ReactNode>>(new Map());
       const [hoveredId, setHoveredId] = useState<string | null>(null);
       const registerSidenote = useCallback((id: string, content: ReactNode) => {
         mapRef.current.set(id, content);
       }, []);
       const getSidenoteContent = useCallback((id: string) => {
         return mapRef.current.get(id);
       }, []);
       return (
         <SidenoteContext value={{ registerSidenote, getSidenoteContent, hoveredId, setHoveredId }}>
           {children}
         </SidenoteContext>
       );
     }
     

   • apps/web/components/mdx/sidenote-ref.tsx (CREATED)

     • Client component: dotted underline anchor text, narrow-screen popover, sets hoveredId on hover
     • Key behavior: onMouseEnter calls setHoveredId(id) + show(), onMouseLeave clears both
     • Popover has xl:hidden class so only shows on narrow screens
     • Smart positioning: above if near viewport bottom, below otherwise

   • apps/web/components/mdx/sidenote.tsx (MODIFIED)

     • Now a "use client" component with optional id prop
     • Registers children into SidenoteProvider on mount via useEffect
     • Reads hoveredId from context, applies sidenote-hover class when matched
     • Adds data-sidenote-id attribute for CSS targeting

   • apps/web/components/mdx/footnote.tsx (MODIFIED)

     • Added positionBelow state, checks getBoundingClientRect().top < 200 on show
     • Tooltip class switches between top-full mt-2 (below) and bottom-full mb-2 (above)

   • apps/web/components/mdx/footnote-provider.tsx (MODIFIED)

     • Fixed numbering bug: useFootnoteIndex now uses useState(() => ctx?.getNextIndex() ?? 0) to capture index once on mount

   • apps/web/components/prose.tsx (MODIFIED)

     • Added SidenoteProvider wrapping inside FootnoteProvider:

     <FootnoteProvider>
       <SidenoteProvider>{children}</SidenoteProvider>
     </FootnoteProvider>
     

   • apps/web/mdx-components.tsx (MODIFIED)

     • Added SidenoteRef import
     • Added sn: href detection before existing link handling:

     if (href?.startsWith("sn:")) {
       const sidenoteId = href.slice(3);
       return <SidenoteRef id={sidenoteId}>{children}</SidenoteRef>;
     }
     

   • apps/web/styles/globals.css (MODIFIED)

     • Added .sidenote-ref-trigger underline styles (dotted accent)
     • Added narrow-screen hiding: .sidenote[data-sidenote-id] { display: none; }
     • Added .sidenote.sidenote-hover alongside :hover in expand rules

   • apps/web/lib/mdx-footnote-loader.cjs (CREATED - current approach, NOT WORKING)

     • Webpack pre-loader converting ^[...] to <Footnote>...</Footnote> in raw source
     • Handles fenced code blocks, inline code spans
     • Uses /* global module */ for ESLint compatibility
     • This is the current problematic approach - the loader may not be running

   • apps/web/lib/remark-inline-footnotes.mjs (MODIFIED but now UNUSED)

     • Was rewritten to scan across sibling AST nodes
     • Removed from remarkPlugins in next.config.ts
     • Still exists on disk

   • apps/web/next.config.ts (MODIFIED)

     • Removed remark-inline-footnotes.mjs from remarkPlugins
     • Added webpack pre-loader rule:

     config.module.rules.push({
       test: /\.mdx$/,
       enforce: "pre",
       use: [path.resolve(__dirname, "./lib/mdx-footnote-loader.cjs")],
     });
     

   • content/spring2026/readings/understanding-media-ch1.mdx (MODIFIED)

     • Added id props to 16 sidenotes (all except first reading-tips one)
     • Added [anchor text](sn:id) markers in prose for each connected sidenote
     • IDs: thesis, electric-light, content-blinds, shakespeare, selye, sarnoff, sequence-simultaneity, cubism, tocqueville, narcissus-trance, reason-literacy, inundation, intelligence, meat-burglar, effects-below-opinion, become-behold, schramm, equilibrium, staples, jung-closing

   • testing/e2e/tests/reading-footnotes.spec.ts (CREATED)

     • E2e test checking: no ^[ in page text, footnote buttons exist, tooltip on click, sidenote refs exist, connected sidenotes have data-sidenote-id, first sidenote has no id

   • testing/e2e/playwright.config.ts (MODIFIED)

     • Added reading-footnotes project

4. Errors and Fixes:

   • Lint error: no-unused-expressions in sidenote-ref.tsx ternary: Changed visible ? setVisible(false) : show() to if/else block
   • Footnote numbering incrementing on hover: useFootnoteIndex() called getNextIndex() on every render. Fixed by wrapping in useState(() => ...) to capture once on mount
   • Sidenote anchor hover not expanding sidenote on wide screens: Added hoveredId state to SidenoteProvider, sidenote-hover CSS class
   • Self-referential sidenote anchors: Shakespeare and Jung sidenotes had [anchor text](sn:id) inside their own sidenote content. Moved anchors to prose text.
   • Footnotes with Markdown not rendering: Remark plugin operates after Markdown parsing, so ^[text *emphasis*] splits across AST nodes. First fix (multi-node scanning in remark plugin) was insufficient. Second fix: webpack pre-loader to convert ^[...] to <Footnote>...</Footnote> in raw source.
   • ESLint no-undef for module in CJS file: Used /* global module */ comment (flat config doesn't support /* eslint-env */)
   • CURRENT: Webpack pre-loader NOT WORKING - e2e test confirms ^[ still appearing in rendered page. The enforce: "pre" rule may not be applied correctly, or caching, or the loader isn't matching MDX files processed by @next/mdx.

5. Problem Solving:

   • Successfully implemented the sidenote connection system (SidenoteProvider, SidenoteRef, modified Sidenote)
   • Successfully fixed footnote positioning and numbering
   • Successfully added sidenote hover expansion from anchor text
   • UNRESOLVED: Footnotes with Markdown content still showing as raw ^[...] text. The webpack pre-loader approach (mdx-footnote-loader.cjs with enforce: "pre") is not working. The e2e test confirmed this - some ^[ markers still appear in the rendered page.

6. All User Messages:

   • "Implement the following plan: [detailed plan for connected sidenotes + footnote positioning fix]"
   • "OK! Looking better. A few notes. First, when I hover over the outline for a Sidenote anchor, let's open it just like when I hover over it in full-width mode. Second, the footnote numbering is broken. When I hover they keep increasing! :-) Otherwise this is coming along nicely."
   • "Some footnotes are sneaking through into the main text: ^[E. H. Gombrich (1909-2001), art historian whose Art and Illusion (1960) analyzed how we perceive and interpret images.]"
   • "We actually want to make sure that footnote contents also support Markdown. I'm pretty sure I got that to work in ../geoffreychallen.com, so you might look there for inspiration."
   • "Sorry, more footnote problems: ^[McLuhan uses Narcissus throughout the book — not as vanity, but as numbness. In the myth, Narcissus was paralyzed by his own reflection, unable to recognize it as an extension of himself. McLuhan argues we are similarly numb to our own technological extensions.]"
   • "Quite a few are not being parsed properly."
   • "I see some of them though. It's weird."
   • "I restarted the server but do not see the change. Examine: https://[local-hostname]/spring2026/readings/understanding-media-ch1."
   • "Can we use an e2e test for this?"

7. Pending Tasks:

   • Fix the footnote rendering so ALL ^[...] markers are properly converted to <Footnote> components with Markdown support inside
   • The webpack pre-loader approach (mdx-footnote-loader.cjs) is not working and needs to be debugged or replaced
   • The e2e test exists and correctly catches the bug — it should pass once the fix works

8. Current Work: I was working on getting footnotes with Markdown content to render properly. The webpack pre-loader (mdx-footnote-loader.cjs) was created and configured in next.config.ts with enforce: "pre", but the e2e test proves it's not working — ^[ markers still appear in rendered output.

   The e2e test (testing/e2e/tests/reading-footnotes.spec.ts) failed with raw ^[ text visible on the page. From the test output, specific failures include ^[John U. Nef (1899-1988)...] and ^[Carl Jung (1875-1961)...] appearing as raw text.

   The user asked "Can we use an e2e test for this?" and I created and ran the test, which confirmed the bug.

9. Optional Next Step: Debug why the webpack pre-loader (mdx-footnote-loader.cjs) is not processing MDX files. The enforce: "pre" rule added via config.module.rules.push() may not interact correctly with @next/mdx's loader chain. Options include:

   • Investigate the webpack rule structure created by @next/mdx and ensure the pre-loader runs before it
   • Consider an alternative approach: put the remark plugin back but fix it, or use a different mechanism to preprocess the MDX source
   • The old remark plugin (remark-inline-footnotes.mjs) is still on disk and could be restored if needed, but it has the fundamental limitation of running after Markdown parsing

   The user's last explicit action was asking to use an e2e test, and the test revealed the footnote rendering is still broken. The immediate task is to fix the footnote preprocessing so the e2e test passes.

If you need specific details from before compaction (like exact code snippets, error messages, or content you generated), read the full transcript at: ~/.claude/projects/-Users-challen-www-usingandunderstanding-ai/0c63a79b-92ff-4444-8c8d-6076f94f3533.jsonl Please continue the conversation from where we left it off without asking the user any further questions. Continue with the last task that you were asked to work on.

Should we just use webpack for both dev and production? I think we moved away from turbopack for production due to a crash, but it would be nice not to have a difference here.

It's not working: @repo/api:dev: [23:37:11.037] INFO (ingest/72323): Content indexing complete @repo/web:dev: ▲ Next.js 16.1.6 (Turbopack) @repo/web:dev: - Local: http://localhost:2000 @repo/web:dev: - Network: http://[ip]:2000

Turbopack may be the default now?

Your task

First, run git status, git diff, and git log --oneline -10 to understand the current state.

Then add and commit all modified files with a descriptive message. Break the changes into multiple commits if appropriate. If there are untracked files, ask if they should be added or added to the appropriate .gitignore file. The user may also want to take over at this point, so provide an abort option as well. Always check changes for unnecessary debugging statements or logging that might have been accidentally included. Prompt the user if you find any, and offer to remove each one by one. Do not use interactive git staging (git add -p) as it does not work.

1

OK. But now I'm still not happy with this approach. What's wrong with how it's done by ../geoffreychallen.com? That seems to work and doesn't require webpack. I'd like to be able to use Turbopack in development and at some point in production once they fix whatever bug we're hitting.

I think you need to use the same pinned version. The newer ones are broken.

Continue.

Error evaluating Node.js code @repo/web:dev: Error: Cannot find module 'remark-footnotes' @repo/web:dev: Require stack: @repo/web:dev: - /www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js @repo/web:dev: - /www/usingandunderstanding.ai/node_modules/.bun/next@16.1.6+f27840211c12abb1/node_modules/next/dist/compiled/loader-runner/LoaderRunner.js @repo/web:dev: - /www/usingandunderstanding.ai/apps/web/.next/dev/build/chunks/[root-of-the-server]__6e020478._.js @repo/web:dev: - /www/usingandunderstanding.ai/apps/web/.next/dev/build/chunks/[turbopack]_runtime.js @repo/web:dev: - /www/usingandunderstanding.ai/apps/web/.next/dev/build/webpack-loaders.js @repo/web:dev: [at Module._resolveFilename (node:internal/modules/cjs/loader:1421:15)] @repo/web:dev: [at require.resolve (node:internal/modules/helpers:163:19)] @repo/web:dev: [at importPluginForPath (/www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js:9:24)] @repo/web:dev: [at importPlugin (/www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js:20:23)] @repo/web:dev: [at /www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js:44:37] @repo/web:dev: [at <anonymous>] @repo/web:dev: [at getOptions (/www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js:44:21)] @repo/web:dev: [at Object.nextMdxLoader (/www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js:61:3)] @repo/web:dev: [at LOADER_EXECUTION (/www/usingandunderstanding.ai/node_modules/.bun/next@16.1.6+f27840211c12abb1/node_modules/next/dist/compiled/loader-runner/LoaderRunner.js:1:4134)] @repo/web:dev: [at runSyncOrAsync (/www/usingandunderstanding.ai/node_modules/.bun/next@16.1.6+f27840211c12abb1/node_modules/next/dist/compiled/loader-runner/LoaderRunner.js:1:4145)] @repo/web:dev:

Nope: Starting... @repo/web:dev: ✓ Ready in 822ms @repo/web:dev: ⨯ ./content/spring2026/readings/understanding-media-ch1.mdx @repo/web:dev: Error evaluating Node.js code @repo/web:dev: Error: Cannot find module 'remark-footnotes' @repo/web:dev: Require stack: @repo/web:dev: - /www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js @repo/web:dev: - /www/usingandunderstanding.ai/node_modules/.bun/next@16.1.6+f27840211c12abb1/node_modules/next/dist/compiled/loader-runner/LoaderRunner.js @repo/web:dev: - /www/usingandunderstanding.ai/apps/web/.next/dev/build/chunks/[root-of-the-server]__6e020478._.js @repo/web:dev: - /www/usingandunderstanding.ai/apps/web/.next/dev/build/chunks/[turbopack]_runtime.js @repo/web:dev: - /www/usingandunderstanding.ai/apps/web/.next/dev/build/webpack-loaders.js @repo/web:dev: [at Module._resolveFilename (node:internal/modules/cjs/loader:1421:15)] @repo/web:dev: [at require.resolve (node:internal/modules/helpers:163:19)] @repo/web:dev: [at importPluginForPath (/www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js:9:24)] @repo/web:dev: [at importPlugin (/www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js:20:23)] @repo/web:dev: [at /www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js:44:37] @repo/web:dev: [at <anonymous>] @repo/web:dev: [at getOptions (/www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js:44:21)] @repo/web:dev: [at Object.nextMdxLoader (/www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js:61:3)] @repo/web:dev: [at LOADER_EXECUTION (/www/usingandunderstanding.ai/node_modules/.bun/next@16.1.6+f27840211c12abb1/node_modules/next/dist/compiled/loader-runner/LoaderRunner.js:1:4134)] @repo/web:dev: [at runSyncOrAsync (/www/usingandunderstanding.ai/node_modules/.bun/next@16.1.6+f27840211c12abb1/node_modules/next/dist/compiled/loader-runner/LoaderRunner.js

No no no. This never works: ✓ Starting... @repo/web:dev: Error: loader ~/www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js for match "{*,next-mdx-rule}" does not have serializable options. Ensure that options passed are plain JavaScript objects and values.

Can you do some more research about how to do this properly? I feel like we're not approaching this correctly.

Now we're back to this: ✓ Starting... @repo/web:dev: ✓ Ready in 819ms @repo/web:dev: ⨯ ./content/spring2026/readings/understanding-media-ch1.mdx @repo/web:dev: Error evaluating Node.js code @repo/web:dev: Error: Cannot find module 'remark-footnotes' @repo/web:dev: Require stack: @repo/web:dev: - /www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js @repo/web:dev: - /www/usingandunderstanding.ai/node_modules/.bun/next@16.1.6+f27840211c12abb1/node_modules/next/dist/compiled/loader-runner/LoaderRunner.js @repo/web:dev: - /www/usingandunderstanding.ai/apps/web/.next/dev/build/chunks/[root-of-the-server]__6e020478._.js @repo/web:dev: - /www/usingandunderstanding.ai/apps/web/.next/dev/build/chunks/[turbopack]_runtime.js @repo/web:dev: - /www/usingandunderstanding.ai/apps/web/.next/dev/build/webpack-loaders.js @repo/web:dev: [at Module._resolveFilename (node:internal/modules/cjs/loader:1421:15)] @repo/web:dev: [at require.resolve (node:internal/modules/helpers:163:19)] @repo/web:dev: [at importPluginForPath (/www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js:9:24)] @repo/web:dev: [at importPlugin (/www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js:20:23)] @repo/web:dev: [at /www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js:44:37] @repo/web:dev: [at <anonymous>] @repo/web:dev: [at getOptions (/www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js:44:21)] @repo/web:dev: [at Object.nextMdxLoader (/www/usingandunderstanding.ai/node_modules/.bun/@next+mdx@16.1.6+321d56e5e4b893af/node_modules/@next/mdx/mdx-js-loader.js:61:3)] @repo/web:dev: [at LOADER_EXECUTION (/www/usingandunderstanding.ai/node_modules/.bun/next@16.1.6+f27840211c12abb1/node_modules/next/dist/compiled/loader-runner/LoaderRunner.js:1:4134)] @repo/web:dev: [at runSyncOrAsync (/www/usingandunderstanding.ai/node_modules/.bun/next@16.1.6+f27840211c12abb1/node_modules/next/dist/compiled/loader-runner/LoaderRunner.js:1:4145)]

Is it possible that it's not an ESM module?

That works! Yuck though.

Yes! Now, there's a problem with the sidenotes. They are not aligning properly with the underlined content.

In HTML, <p> cannot be a descendant of <p>. This will cause a hydration error.

Ah, now we have a new problem with them overlapping. Also they don't open on hover.

This session is being continued from a previous conversation that ran out of context. The summary below covers the earlier portion of the conversation.

Analysis: Let me go through the conversation chronologically to capture all important details.

1. Context from previous session: The conversation continues from a previous session where a plan was implemented for connected sidenotes + footnote positioning fix. Key issues from before:

   • Sidenote system with SidenoteProvider, SidenoteRef, modified Sidenote component
   • Footnote numbering bug fixed
   • Footnote smart positioning (top/bottom)
   • Webpack pre-loader for ^[...] footnote syntax wasn't working because dev server uses Turbopack
   • E2E test for reading-footnotes was created

2. Session start: The assistant identified the root cause - dev server uses --turbopack and Turbopack doesn't support custom webpack loaders. The mdx-footnote-loader.cjs was proven to work correctly (all 30 footnotes converted) but webpack enforce: "pre" rule was ignored by Turbopack.

3. First fix attempt: Added remark plugin back to remarkPlugins config. Tested with MDX compiler - all footnotes converted successfully. But couldn't test with full e2e (Docker not running).

4. User feedback: "Should we just use webpack for both dev and production?" - User suggested using webpack everywhere instead of Turbopack.

5. Switching to webpack: Changed package.json dev script from --turbopack to removing the flag. But Next.js 16 defaults to Turbopack, so it still showed (Turbopack). User pointed this out. Fixed by adding --webpack flag.

6. User changed direction: "OK. But now I'm still not happy with this approach. What's wrong with how it's done by ../geoffreychallen.com?" - User wants the geoffreychallen.com approach which uses remark-footnotes package.

7. geoffreychallen.com research: Found it uses remark-footnotes@4.0.1 with { inlineNotes: true } and a fixfootnotes remark plugin. User noted "geoffreychallen.com uses a separate builder, not @next/mdx."

8. remark-footnotes approach:

   • Installed remark-footnotes@4.0.1
   • Created fix-footnotes.mjs plugin
   • User said to use pinned version 4.0.1 ("I think you need to use the same pinned version. The newer ones are broken.")
   • Multiple errors with Turbopack:
     • "Cannot find module 'remark-footnotes'" - even after installing at root
     • Tried importing function directly → "does not have serializable options" (Turbopack serialization boundary)
     • User noted: "No no no. This never works"

9. Research on Turbopack plugin resolution: Found that Turbopack has a Rust/JS serialization boundary - only JSON-serializable values survive. Function references fail. String names should work but remark-footnotes wasn't being resolved by the sandboxed require.

10. Final fix for plugin resolution: Used createRequire(import.meta.url) to get require.resolve("remark-footnotes") at config time, passing the absolute path as a string. User confirmed "That works! Yuck though."

11. Sidenote alignment issue: User reported "there's a problem with the sidenotes. They are not aligning properly with the underlined content." Root cause: <Sidenote> blocks appear after paragraphs in document flow, so CSS floats position them at the wrong vertical position.

12. Fix: Render margin notes from SidenoteRef: Changed architecture so margin notes are rendered from within SidenoteRef (inline, next to anchor text) instead of from the block-level <Sidenote>. Used CSS float initially.

13. Hydration error: "In HTML, <p> cannot be a descendant of <p>." - Sidenote content contains <p> tags but was rendered inside <span> inside <p>. User also noted "there's line breaks now after the underlined bits."

14. Portal approach: Used createPortal to render margin notes into a separate container div outside the paragraph flow. Measured anchor position and used absolute positioning.

15. Current issues: User reported "Ah, now we have a new problem with them overlapping. Also they don't open on hover."

• Overlapping: absolute positioned sidenotes don't know about each other
• Hover: portal container or overflow settings preventing mouse events

16. Last assistant action: Updated SidenoteProvider with registerMarginPosition for non-overlapping layout, and updated SidenoteRef to use the position registration. Also updated CSS to remove pointer-events-none from portal container. But this was the LAST code change before the user said the two issues remain (overlapping + no hover).

Wait, actually re-reading: the user said "Ah, now we have a new problem with them overlapping. Also they don't open on hover." AFTER the portal approach was implemented but BEFORE the overlap-fix code was written. Then the assistant wrote the overlap-fix code (registerMarginPosition). So the most recent code changes are the overlap-fix attempt, and we haven't gotten user feedback on those yet.

Let me re-check the sequence:

1. Portal approach written (sidenote-ref.tsx with createPortal, CSS with absolute positioning)
2. User says: "Ah, now we have a new problem with them overlapping. Also they don't open on hover."
3. Assistant writes new code with registerMarginPosition in provider and updated sidenote-ref.tsx
4. Then the summary request comes

So the most recent code hasn't been tested by the user yet.

Key files in their current state:

next.config.ts: Uses createRequire to resolve remark-footnotes path at config time, no webpack pre-loader, no --turbopack flag

package.json: "dev": "exec next dev -p 2000" (defaults to Turbopack in Next.js 16), has remark-footnotes@4.0.1 dependency

fix-footnotes.mjs: Simple plugin converting "footnote" AST nodes to Footnote JSX elements

sidenote-provider.tsx: Has registerMarginPosition for non-overlapping layout, marginContainerRef for portal target

sidenote-ref.tsx: Uses createPortal to render margin notes, measures anchor position, registers for overlap prevention

sidenote.tsx: Simplified - just registers content in context, renders hidden aside with data-sidenote-id

globals.css: .sidenote-margin uses absolute positioning, .sidenote[data-sidenote-id] is display:none

Files removed: mdx-footnote-loader.cjs (webpack pre-loader), remark-inline-footnotes.mjs (old remark plugin)

The commit from earlier (a296a02) included the pre-remark-footnotes state. Since then, many files have been modified but not committed.

Summary:

1. Primary Request and Intent:

   • Implement connected sidenotes that link underlined text to margin notes in a reading page
   • Fix footnote rendering so ^[...] syntax works with Markdown inside (emphasis, links)
   • Use an approach compatible with Turbopack (Next.js 16 default dev mode) — NOT webpack-only
   • Adopt the remark-footnotes@4.0.1 approach from ../geoffreychallen.com for footnote parsing
   • Sidenotes should align visually with their anchor text on wide screens
   • Sidenotes should show as popovers on narrow screens
   • No hydration errors from invalid HTML nesting

2. Key Technical Concepts:

   • Turbopack serialization boundary: Turbopack (Rust-based) serializes loader options across a Rust/JS boundary. Only JSON-serializable values survive — function references fail with "does not have serializable options"
   • Turbopack sandboxed require: Turbopack's loader sandbox can't resolve npm packages via require.resolve the same way Node.js can, even when packages are installed. Fix: pre-resolve paths at config time using createRequire(import.meta.url)
   • remark-footnotes@4.0.1 with { inlineNotes: true }: Parses ^[...] at the micromark tokenizer level (before Markdown inline parsing), so emphasis/links inside footnotes work naturally
   • fixfootnotes pattern: Simple remark plugin that visits "footnote" AST nodes and converts them to mdxJsxTextElement with name "Footnote"
   • HTML nesting constraint: <p> cannot be descendant of <p> — sidenote content (with MDX paragraphs) rendered inside inline elements causes hydration errors
   • createPortal for margin notes: Renders margin notes into a separate container div outside paragraph flow to avoid nesting violations, using absolute positioning to align with anchor text
   • Non-overlapping margin layout: Position registration system in SidenoteProvider to prevent absolutely-positioned margin notes from overlapping

3. Files and Code Sections:

   • apps/web/next.config.ts — MDX pipeline configuration. Uses createRequire to pre-resolve remark-footnotes path for Turbopack compatibility. No webpack pre-loader. Removed remark-inline-footnotes plugin.

     import type { NextConfig } from "next";
     import createMDX from "@next/mdx";
     import path from "path";
     import { createRequire } from "module";
     
     const require = createRequire(import.meta.url);
     
     const nextConfig: NextConfig = {
       output: "standalone",
       transpilePackages: ["@repo/types"],
       pageExtensions: ["js", "jsx", "ts", "tsx", "md", "mdx"],
       allowedDevOrigins: ["[local-hostname]"],
       logging: { incomingRequests: false },
       env: {
         NEXT_PUBLIC_VERSION: process.env.npm_package_version ?? "dev",
         NEXT_PUBLIC_BUILD_TIME: new Date().toISOString(),
       },
       webpack: (config) => {
         config.resolve.alias = {
           ...config.resolve.alias,
           "@content": path.resolve(__dirname, "../../content"),
         };
         return config;
       },
     };
     
     const withMDX = createMDX({
       options: {
         remarkPlugins: [
           [require.resolve("remark-footnotes"), { inlineNotes: true }],
           path.resolve(__dirname, "./lib/fix-footnotes.mjs"),
           "remark-gfm",
           "remark-frontmatter",
           "remark-mdx-frontmatter",
         ],
         rehypePlugins: [
           "rehype-slug",
           ["rehype-autolink-headings", { behavior: "wrap", content: [], test: ["h2", "h3", "h4", "h5", "h6"] }],
         ],
       },
     });
     
     export default withMDX(nextConfig);
     

   • apps/web/package.json — Dev script uses default Turbopack (exec next dev -p 2000), has remark-footnotes@4.0.1 as dependency. Also installed at monorepo root for resolution.

   • apps/web/lib/fix-footnotes.mjs — NEW. Converts remark-footnotes AST nodes to <Footnote> JSX elements.

     import { visit } from "unist-util-visit";
     
     export default function fixFootnotes() {
       return (tree) => {
         visit(tree, "footnote", (node) => {
           Object.assign(node, {
             type: "mdxJsxTextElement",
             name: "Footnote",
             attributes: [],
             children: node.children,
             data: { _mdxExplicitJsx: true },
           });
         });
       };
     }
     

   • apps/web/components/mdx/sidenote-provider.tsx — Context provider with sidenote content registry, portal container ref, and margin position registration for non-overlapping layout.

     "use client";
     import { createContext, useContext, useRef, useCallback, useState, type ReactNode, type RefObject } from "react";
     
     interface MarginPosition { anchorTop: number; adjustedTop: number; height: number; }
     interface SidenoteContextValue {
       registerSidenote: (id: string, content: ReactNode) => void;
       getSidenoteContent: (id: string) => ReactNode | undefined;
       marginContainerRef: RefObject<HTMLDivElement | null>;
       registerMarginPosition: (id: string, anchorTop: number, height: number) => number;
     }
     // ... exports: useSidenote, useSidenoteRegister, useMarginContainer, useRegisterMarginPosition
     // Provider renders: <div className="relative">{children}<div ref={marginContainerRef} className="absolute inset-0 overflow-visible" /></div>
     

   • apps/web/components/mdx/sidenote-ref.tsx — Renders underlined anchor text. Uses createPortal to render margin notes into portal container. Measures anchor position with getBoundingClientRect. Registers position for overlap prevention. Shows popover on narrow screens.

     // Key: margin note rendered via portal
     const marginNote = content && marginContainer?.current
       ? createPortal(
           <aside ref={marginRef} className="sidenote-margin" data-sidenote-id={id}
             style={{ top: marginTop ?? -9999 }}>
             {content}
           </aside>,
           marginContainer.current,
         )
       : null;
     

   • apps/web/components/mdx/sidenote.tsx — Simplified. Registers content in context via useEffect. Renders hidden <aside> with data-sidenote-id (display:none via CSS). No hover tracking.

   • apps/web/styles/globals.css — Sidenote CSS:

     • .sidenote[data-sidenote-id] → display: none (content shown from SidenoteRef instead)
     • .sidenote-ref-trigger → dotted underline styling
     • .sidenote-margin → position: absolute; right: -16rem; width: 14rem; with max-height, overflow hidden, expand on hover
     • Narrow screens: .sidenote-margin { display: none }, .sidenote-ref-trigger { cursor: help }

   • apps/web/components/mdx/footnote.tsx — Smart positioning (below when near top of viewport), fixed numbering via useState(() => ctx?.getNextIndex() ?? 0)

   • apps/web/components/mdx/footnote-provider.tsx — Fixed numbering bug with stable index capture

   • apps/web/mdx-components.tsx — Added sn: href detection for sidenote refs

   • apps/web/components/prose.tsx — Wraps children in FootnoteProvider > SidenoteProvider

   • Files REMOVED: apps/web/lib/mdx-footnote-loader.cjs (webpack pre-loader), apps/web/lib/remark-inline-footnotes.mjs (old remark plugin)

   • testing/e2e/tests/reading-footnotes.spec.ts — E2E test checking no ^[ markers, footnote buttons exist, sidenote refs exist

   • content/spring2026/readings/understanding-media-ch1.mdx — Reading with 16 connected sidenotes using id props and [anchor text](sn:id) markers, plus ~30 inline footnotes using ^[...] syntax

4. Errors and Fixes:

   • Turbopack ignores webpack pre-loader: Dev server uses --turbopack (Next.js 16 default). enforce: "pre" webpack rules don't run. Fixed by switching to remark-footnotes package approach.
   • Next.js 16 defaults to Turbopack: Removing --turbopack flag isn't enough. Need --webpack to explicitly use webpack. User pointed this out: "Turbopack may be the default now?"
   • "Cannot find module 'remark-footnotes'": Turbopack's sandboxed require couldn't resolve the package even when installed at root. User confirmed it persisted even after root install. Fixed by pre-resolving with createRequire(import.meta.url) and passing absolute path.
   • "does not have serializable options": Importing remarkFootnotes function and passing directly fails because Turbopack serializes options across Rust/JS boundary. User said "No no no. This never works." Fixed by using string path from require.resolve() instead.
   • <p> cannot be descendant of <p>: Sidenote content (MDX paragraphs) inside inline <span> inside paragraph. User reported hydration error. Fixed with createPortal approach.
   • Line breaks after underlined text: Caused by rendering block-level sidenote content inline next to anchor. Fixed by portal approach.
   • Sidenotes not aligned with anchor text: CSS floats position from document flow position (after paragraph), not next to anchor. Fixed by rendering margin notes from SidenoteRef (inline position) instead of block <Sidenote>.
   • Overlapping sidenotes + no hover expand: Absolute positioned notes overlap when close together. Portal container may block pointer events. Last code change attempted to fix with registerMarginPosition — NOT YET TESTED by user.

5. Problem Solving:

   • Footnote rendering solved via remark-footnotes@4.0.1 + fix-footnotes.mjs plugin — handles ^[...] at tokenizer level
   • Turbopack plugin compatibility solved via require.resolve() at config time
   • HTML nesting solved via createPortal to render margin notes outside paragraph flow
   • Sidenote alignment solved by rendering margin content from SidenoteRef (at anchor position) instead of block <Sidenote>
   • Overlap prevention and hover: code written but NOT YET VERIFIED

6. All User Messages:

   • "Should we just use webpack for both dev and production? I think we moved away from turbopack for production due to a crash, but it would be nice not to have a difference here."
   • "It's not working: @repo/web:dev: ▲ Next.js 16.1.6 (Turbopack)" [still showing Turbopack]
   • "Turbopack may be the default now?"
   • "OK. But now I'm still not happy with this approach. What's wrong with how it's done by ../geoffreychallen.com? That seems to work and doesn't require webpack. I'd like to be able to use Turbopack in development and at some point in production once they fix whatever bug we're hitting."
   • "geoffreychallen.com uses a separate builder, not @next/mdx."
   • "I think you need to use the same pinned version. The newer ones are broken."
   • "Continue."
   • "Error evaluating Node.js code... Cannot find module 'remark-footnotes'" [first time]
   • "Nope: [same Cannot find module error]" [after root install]
   • "Now we're back to this: [Cannot find module error]" [after config change to string tuple]
   • "Is it possible that it's not an ESM module?"
   • "No no no. This never works: [serializable options error]"
   • "Can you do some more research about how to do this properly? I feel like we're not approaching this correctly."
   • "Now we're back to this: [Cannot find module error again]" [after research-based string tuple fix]
   • "That works! Yuck though." [after require.resolve at config time]
   • "Yes! Now, there's a problem with the sidenotes. They are not aligning properly with the underlined content."
   • "In HTML, <p> cannot be a descendant of <p>. This will cause a hydration error."
   • "Also there's line breaks now after the underlined bits." [sent while assistant was working]
   • "Ah, now we have a new problem with them overlapping. Also they don't open on hover."

7. Pending Tasks:

   • Fix sidenote margin notes overlapping each other
   • Fix sidenote margin notes not expanding on hover
   • The most recent code changes (registerMarginPosition, updated SidenoteRef with portal + position measurement) have NOT been tested by the user yet
   • E2E test (reading-footnotes) needs to be verified once full infrastructure is available
   • Git commit needed for all changes since a296a02

8. Current Work: The user reported two issues after the portal-based margin note approach: "Ah, now we have a new problem with them overlapping. Also they don't open on hover." The assistant then rewrote sidenote-provider.tsx with a registerMarginPosition system and updated sidenote-ref.tsx to measure anchor positions and register for non-overlapping layout. The CSS in globals.css had already removed pointer-events-none from the portal container and uses .sidenote-margin:hover for expand behavior. These changes have been written to disk but the user has NOT yet tested or provided feedback on them.

9. Optional Next Step: Wait for user feedback on the overlap/hover fixes. The two reported issues were:

   • "now we have a new problem with them overlapping" — addressed by registerMarginPosition in provider
   • "they don't open on hover" — the portal container div still has className="absolute inset-0 overflow-visible" without explicit pointer-events settings; the CSS .sidenote-margin:hover should work but the container might need adjustment. The overlap registration logic also has a potential issue: it runs in useEffect with requestAnimationFrame but the registerMarginPosition function's overlap check iterates existing positions — the order of registration depends on component mount order, which may not be document order. This could cause incorrect overlap calculations. May need to sort by anchorTop before adjusting.

If you need specific details from before compaction (like exact code snippets, error messages, or content you generated), read the full transcript at: ~/.claude/projects/-Users-challen-www-usingandunderstanding-ai/0c63a79b-92ff-4444-8c8d-6076f94f3533.jsonl Please continue the conversation from where we left it off without asking the user any further questions. Continue with the last task that you were asked to work on.

Your task

First, run git status, git diff, and git log --oneline -10 to understand the current state.

Then add and commit all modified files with a descriptive message. Break the changes into multiple commits if appropriate. If there are untracked files, ask if they should be added or added to the appropriate .gitignore file. The user may also want to take over at this point, so provide an abort option as well. Always check changes for unnecessary debugging statements or logging that might have been accidentally included. Prompt the user if you find any, and offer to remove each one by one. Do not use interactive git staging (git add -p) as it does not work.

Can we write e2e tests for these features?