feat: add copy-to-clipboard functionality to markdown code blocks and…

[rohitbathi]

Add copy button to code blocks & remove conditional padding from session surface

Summary

• Added a functional copy button to Markdown code blocks.
• Enabled the code block header to stay sticky to the chat viewport during vertical scrolling.
• Removed the conditional top padding (pt-16 / pt-4 when findOpen is active) from the chat session surface container.

Why

• Implements request [Feature Request] Add a copy button to code blocks #2478 to allow users to quickly copy code from the chat interface.
• Ensures the copy button stays visible while reading long blocks of code.
• Cleaned up conditional surface padding calculation in the session surface layout.

Issue

• Closes [Feature Request] Add a copy button to code blocks #2478

Scope

• apps/app/src/components/markdown/markdown.tsx (HTML wrapper container structure, copy click listener, DOMPurify whitelisting)
• apps/app/src/react-app/domains/session/surface/session-surface.tsx (Session surface padding layout change)

Out of scope

• Customizing code syntax highlighting color schemes or individual token colors (controlled natively by the global Shiki theme settings).

Testing

Ran

• pnpm typecheck
• pnpm --filter @openwork/app test

Result

• pass/fail: pass
• details: 117 pass 0 fail 229 expect() calls Ran 117 tests across 24 files. [458.00ms]

CI status

• pass: pass
• code-related failures: None
• external/env/auth blockers: None

Manual verification

1. Start the desktop client (pnpm dev).
2. Open a session and ask the model for code (e.g. write a hello world in python).
3. Click "Copy" on the new header bar, confirm the checkmark icon animates for 500ms, and verify clipboard contents.
4. Scroll the chat page up/down to confirm the header stays stuck to the viewport header until the code block leaves the page.

Evidence

Risk

• Low. Purely frontend layout and event interception changes.

Rollback

• Revert commits to markdown.tsx and session-surface.tsx.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
openwork-landing	Ready	Preview, Comment, Open in v0	Jul 7, 2026 6:54pm

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[Pablosinyores]

The copy button itself works, but a few things below the line before this is ready.

• [high] The change to session-surface.tsx removes the findOpen ? "pt-16" : "pt-4" top padding entirely. That padding is intentional — its own comment says it keeps the find bar from covering the first message on short transcripts that cannot scroll it clear. Dropping it reintroduces that bug, and it is unrelated to copy-to-clipboard, so it should come out of this PR.
• [high] The base (non-highlighted) code renderer now returns a multi-line template with the <code> indented on its own line inside <pre>. <pre> preserves whitespace, so this injects a leading newline + indentation into every non-highlighted code block (visible during streaming before Shiki takes over). Also that renderer only gained a wrapper <div> — no copy button — while the button lives solely in the Shiki container, so the two code paths are inconsistent. Either keep <pre><code> on one line, or move the button into a shared wrapper both paths use.
• [medium] The sticky header hardcodes bg-white, and both SVGs hardcode stroke="#000000". In dark mode the header renders white and the icons black. Use theme tokens (e.g. bg-gray-1 / stroke-current or currentColor) so it follows the active theme — there is active theme work in flight here (#2447/#2466/#2329).
• [minor] z-2 is not a default Tailwind utility; unless it is in your scale it is a no-op. Use z-[2] (or a real scale value) so the sticky header layers as intended.
• [nit] The clipboard failure path only does console.log('Copy failed') — leftover log, and the user gets no feedback. Consider surfacing a brief failure state on the button (mirroring the success check-mark swap).

[rohitbathi]

The copy button itself works, but a few things below the line before this is ready.

• [high] The change to session-surface.tsx removes the findOpen ? "pt-16" : "pt-4" top padding entirely. That padding is intentional — its own comment says it keeps the find bar from covering the first message on short transcripts that cannot scroll it clear. Dropping it reintroduces that bug, and it is unrelated to copy-to-clipboard, so it should come out of this PR.
• [high] The base (non-highlighted) code renderer now returns a multi-line template with the <code> indented on its own line inside <pre>. <pre> preserves whitespace, so this injects a leading newline + indentation into every non-highlighted code block (visible during streaming before Shiki takes over). Also that renderer only gained a wrapper <div> — no copy button — while the button lives solely in the Shiki container, so the two code paths are inconsistent. Either keep <pre><code> on one line, or move the button into a shared wrapper both paths use.
• [medium] The sticky header hardcodes bg-white, and both SVGs hardcode stroke="#000000". In dark mode the header renders white and the icons black. Use theme tokens (e.g. bg-gray-1 / stroke-current or currentColor) so it follows the active theme — there is active theme work in flight here (fix(app): render code blocks with theme-aware Shiki palette #2447/fix(app): replace color classes that are missing from the Tailwind palette #2466/fix(settings): keep theme previews independent of active theme #2329).
• [minor] z-2 is not a default Tailwind utility; unless it is in your scale it is a no-op. Use z-[2] (or a real scale value) so the sticky header layers as intended.
• [nit] The clipboard failure path only does console.log('Copy failed') — leftover log, and the user gets no feedback. Consider surfacing a brief failure state on the button (mirroring the success check-mark swap).

I am working on it, thanks for the feedback.

[rohitbathi]

I've updated the PR to address the comments:

• Replaced the hardcoded white/black styles with theme tokens (used bg-gray-1 and stroke="currentColor").
• Resolved z-2 to z-[2].
• Created a shared generateCodeBlockContainer helper function so the copy button is consistent across both fallback and highlighted paths.
• Added a visual red X-mark failure state on clipboard copy failure.
• Fixed the find-bar padding issue using a spacer div dynamic height approach.

---

fraimz — ✅ PASSED

1 passed · 0 failed · 0 skipped — run 2026-07-07T06-56-01-979Z

Full frame proof with validated screenshots: evals/results/2026-07-07T06-56-01-979Z/fraimz.html (re-run: pnpm fraimz --flow core-flow)

✅ core-flow — Open app, send a message, get a response, reopen with session intact

1. App boots clean to a known route

— 4 validations passed 2. **A new session is created and becomes active** - — 3 validations passed 3. **The composer accepts a message and the agent responds** - ✅ Visible text does not include "Something went wrong" - — 4 validations passed 4. **Reopening restores the session and its message history** - — 4 validations passed

[Pablosinyores]

Thanks for the quick turnaround — most of it is handled. Went through the updated diff:

• find-bar padding (spacer div) — works; top padding on a scroll container scrolls with the content anyway, so the h-16/h-4 spacer is equivalent. Minor: <div className={findOpen ? "h-16" : "h-4"} /> is a touch cleaner than the two-branch ternary.
• shared generateCodeBlockContainer + single-line <pre><code> — good, the leading-newline-in-<pre> issue is gone and both the fallback and highlighted paths get the button now.
• z-[2], stroke="currentColor" on the copy icon, and the red-X failure state — all addressed.

Two things left:

• [medium] The sticky header uses bg-currentColor, which isn't a stock Tailwind class — the utility for currentColor is bg-current, and even that would paint the text color as the background. So the header ends up with no surface and the code scrolls visibly under it, which defeats the sticky masking. You mentioned switching to bg-gray-1, but the header <div> still reads bg-currentColor; setting it to bg-gray-1 (matching the container surface) fixes it.
• [minor] The non-highlighted code path now double-wraps chrome: generateCodeBlockContainer already carries rounded-lg border border-border/70 bg-gray-1/80 p-4, and the inner <pre> it wraps still has its own rounded-[18px] border border-border/70 bg-gray-1/80 px-4 py-3, so those blocks render a bordered box inside a bordered box. Dropping the border/bg/rounded from the inner <pre> (letting the container own the chrome) would match the highlighted path.

Nothing major — fix the bg-currentColor and it's basically there.

[rohitbathi]

Thanks for catching those! I've gone ahead and addressed both:

• Switched the sticky header background from bg-currentColor to bg-gray-1 (matching the container's surface color).
• Cleaned up the non-highlighted code path by stripping the duplicate border, background, padding, and rounding styles from the inner pre tag so the outer container owns it.

Let me know if everything looks good now, thanks again.