Docs are meant to be diffed read.

your agent

Your agent writes plans.
Review them like a coworker's.

The whole loop — including the instructions to hand your agent — is worked through on the agents page. Margin notes are in beta and on by default; the docs cover the mechanics.

why

Prose isn't code.
Stop reviewing it like code.

“The reading room next to the workshop.”

reviewing

The whole docs review, from the rendered page.

Switch between inline and side-by-side layouts, drop to the raw Source Diff, or preview the final Result — all from the toolbar, which also walks you file to file and back to the PR without touching the sidebar. YAML front matter renders as a quiet metadata table, not a wall of bold prose — so config-heavy docs diff cleanly too. A brand-new document reads as a document — one note says it's all new, instead of tinting every block green. Existing review threads appear under the blocks they discuss. Hover any block, click the bubble, and comment on the whole block or exactly the lines you pick. When you're done, Approve, Request Changes, or Comment right from the overview — with or without line comments — and drop file-level or plain conversation comments too. The overview shows where the PR stands: approved or changes requested, every reviewer's verdict, CI checks with a click-through to any check's logs, and the full conversation as a readable timeline. Open PRs are checked every minute; if the branch moves, one click refreshes and your drafts survive.

reading

A proper reader for the Markdown already on your disk.

Your notes, your READMEs, your team's docs folder — open a file or a whole directory and read it the way it was meant to look. Everything re-renders the moment it changes on disk, relative images and links just resolve, and if GitHub renders it, PullMark renders it:

Bold, italic, strikethrough, inline code, highlight, H₂O, mc², e^iπ + 1 = 0, links with hover previews, footnotes[1], task lists — plus tables, Mermaid diagrams, syntax-highlighted code, > [!NOTE] alerts, offline KaTeX math, [toc], and YAML front matter folded into a tidy metadata table.

• History in the margin — a quiet blame gutter: one avatar per run of blocks; hover for author, date, and commit; click for the full line history.
• Always current — save from any editor and the page has already re-rendered.
• Diff against history — one click compares the working file with any recent commit or branch, rendered like a PR diff, live as the file keeps changing; pullmark --diff does it from a terminal — the fastest "what did the agent just change to my doc".
• Browse without burying yourself — single-click through a folder or a repo and each file shows as a preview: one italicized entry in Open Files that the next click replaces. Double-click (or just start editing) to keep it.
• Outline sidebar — a navigator-style map of your headings, one toggle away.
• Find anything — ⌘F steps through matches on the page; ⇧⌘F searches every file in the sidebar at once.
• Zoom that reflows — ⌘+ and ⌘− (or a pinch) scale text, images, and the reading column together, remembered across launches; the navigation grows with it.
• Click to inspect — images, Mermaid diagrams, and block formulas open in a focused pan-and-zoom overlay, so complex diagrams aren't stuck at column width — and save or share exactly what you're inspecting (diagrams as real SVGs).
• Take it anywhere — export as PDF or a single self-contained HTML file; ⌘C pastes rich into Docs and Slack, ⌥⌘C gives the Markdown back.
• Three reading themes — Editorial, GitHub, and Terminal, with live previews in Settings — or drop in your own CSS. Light & dark restyle everything, Mermaid included, and the line length is yours: Standard, Wide, or Full Width.
• GitHub links open in-app — click a github.com link to a Markdown file and PullMark renders it, with an always-visible repo @ branch provenance bar; ⌘-click sends it to the browser instead.
• Open Quickly — ⌘K jumps to any heading, file, or PR, fuzzy-matched — or paste a PR URL, a repo URL, or a file path and it opens that directly.
• Moved means moved — a paragraph relocated verbatim renders once with a quiet violet chip, not red-plus-green noise.
• Picks up where you left off — your files, PRs, and reading position restore at launch.

Those are the highlights. The docs cover the rest — every feature, every setting, every icon, the full keyboard map, and the pullmark command.

Read by default. Edit in place.

Press ⌘E and the page becomes the editor: the block under your cursor reveals its raw Markdown in place — same type, same position, nothing jumps — and you're typing immediately. Arrow through blocks, merge with Backspace, split with a blank line; leaving a block saves it through the same guarded, versioned path as everything else. Reading stays the default; the mode boundary is the save gesture.

GitHub is a place your docs live. Read it like one.

Click a github.com link to a Markdown file and PullMark fetches and renders it in-app — your first click asks which behavior you want, and ⌘-click always does the other. A provenance bar above the page says exactly which repo and branch you're reading, pinned to the commit it resolved to; relative links keep resolving against the repo, the whole Markdown tree is one click away in the sidebar, and private repos use the GitHub sign-in your PRs already use — nothing fetched ever touches disk. Branches are a chip on every repo: switch in place, open another branch as its own sidebar entry, or hop into a local worktree. And if the repo is already cloned on your Mac on that branch, the link opens your local file instead.

native

A Mac app that acts like one.