Building the agentic future of
agency management.

Production websites and custom software, engineered for clients on a platform we build ourselves.

Terminal, the Stacklumen site builder, in its light frame: one bar with the site and page, four breakpoint layers, zoom, Preview and Publish; the Insert panel of section presets; a client page on the canvas; and the inspector with its state tray and property groups. A short demo plays: the cursor opens Typography, drags the heading from 46 to 58 pixels, retypes its last words on the canvas, then walks the page through Tablet and Phone and back. Between those steps the window changes to StackIDE, the Stacklumen desktop app, with the same site open: the page opens from its folder, Claude Code tightens the heading from a terminal, the heading is rewritten and saved, and the Designer tab shows it live; another time the site is published from the sidebar and Pulse counts up the week. StackIDE comes with links to download it and to read about it.

NorthgateSite / Home DesktopLaptopTabletPhone Fill Light 57% Preview Publish AK

Insert

{INSERT_SECS.map((s, i) => ( {s} ))}

Search⌘K

Navigation

Banner 48 Navbar 72

Hero

Hero, centred 520 Hero, split 520

Content

Feature grid 440 Call to action 300

Commerce

Pricing, three up 560

Forms

Contact form 640 Newsletter 280

Footer

Footer 420

Home · Desktop 1200pxbase styles

Buildings that hold their light.

Homes, schools and libraries, drawn around the daylight.

See the work

Twelve years, three kinds of building.

HomesHouses drawn around the light each room gets, season by season.SchoolsClassrooms that stay calm at nine and bright at three.LibrariesReading rooms with long views and quiet corners.

h1.cs-split__title

Inspector h1

h1 cs-split__title + class h1 DefaultHoverFocusActive

Style Interact Settings

Layout

Display BlockFlexGridNone

Inline—

{g.rows?.map((r) => ( <div class="slt-prop" data-set={r.set ? '' : undefined} data-kind={r.k}> {r.k === 'fold' ? ( <ChevronRight />{r.l} ) : ( {r.l} )} {r.k === 'select' && ( {r.v}<ChevronDown />{r.tok && <Braces className="slt-tok" />} )} {(r.k === 'input' || r.k === 'unit') && ( {r.v}{r.unit && {r.unit}}{r.tok && <Braces className="slt-tok" />} )} {r.k === 'swatch' && ( {r.v}{r.tok && <Braces className="slt-tok" />} )} {r.k === 'seg' && ( {r.opts!.map(({t, on, icon: Ico, cls: oc}) => ( {Ico ? <Ico /> : oc?.includes('is-line') ? : t} ))} )} {r.k === 'actions' && ( {r.opts!.map((o) => {o.t})} )} {r.k === 'pair' && ( {r.pair![0]}0 {r.pair![1]}0 )} {r.k === 'scale' && ( ⇔0×0 )} {r.k === 'aligns' && ( <AlignStartVertical /><AlignCenterVertical /><AlignEndVertical /> <AlignStartHorizontal /><AlignCenterHorizontal /><AlignEndHorizontal /> )} {r.k === 'range' && ( {r.v} )} </div> ))}

In parent layout

Grow0

Shrink1

Basisauto—

Align self—

Column span1

Row span1

The parent is a block box, so there is nothing to set here.

The page root has no parent layout.

Spacing

Margin 0 0 0 0 Padding 0 0 0 0 0 × 0

Margin0

Size

Frame W0 H0

Width auto—

Height auto—

Min width auto—

Max width min(480px, 100%)—

Ratio 16 / 9

Scale ⇔0×0

Align

Position

Position —

Top auto—

Right auto—

Bottom auto—

Left auto—

Z-index 0

Typography

Font inherited

Weight

Size px

Line height

Colour

Align LeftCentreRightJustify

Letter spacing em

Case {Ico ? <Ico /> : oc?.includes('is-line') ? : t}{Ico ? <Ico /> : oc?.includes('is-line') ? : t}{Ico ? <Ico /> : oc?.includes('is-line') ? : t}{Ico ? <Ico /> : oc?.includes('is-line') ? : t}

Italic {Ico ? <Ico /> : oc?.includes('is-line') ? : t}I

Decoration {Ico ? <Ico /> : oc?.includes('is-line') ? : t}SUO

Background

Fill {Ico ? <Ico /> : oc?.includes('is-line') ? : t}{Ico ? <Ico /> : oc?.includes('is-line') ? : t}{Ico ? <Ico /> : oc?.includes('is-line') ? : t}

Colour —

Images ImageScrim

Size —

Borders

Radius 0px

Side {Ico ? <Ico /> : oc?.includes('is-line') ? : t}{Ico ? <Ico /> : oc?.includes('is-line') ? : t}{Ico ? <Ico /> : oc?.includes('is-line') ? : t}{Ico ? <Ico /> : oc?.includes('is-line') ? : t}{Ico ? <Ico /> : oc?.includes('is-line') ? : t}

Style {Ico ? <Ico /> : oc?.includes('is-line') ? : t}

Width 1pxpx

Colour currentColor

Effects

Opacity 1

Blend mode —

Box shadows

Text shadow

2D & 3D transforms

Transitions

Cursor —

Custom CSS

transform: rotate(3deg);
box-shadow: 0 8px 24px rgba(0,0,0,.12);

Declarations the groups above do not edit. One per line, applied when you click away.

h1.cs-split__title snap objects · grid 57%

Home Publish

DesktopLaptopTabletPhone

Home · Phone 390px≤ 480px

Buildings that hold their light.

Homes, schools and libraries, drawn around the daylight.

See the work

Twelve years, three kinds of building.

HomesHouses drawn around the light each room gets, season by season.SchoolsClassrooms that stay calm at nine and bright at three.LibrariesReading rooms with long views and quiet corners.

h1.cs-split__title

Inspector h1

h1 cs-split__title Typography

Size46px

Line height1.06

Frame W0 H0

h1.cs-split__title

What you set is what ships. To the pixel.

The canvas, the preview and the published page read the same values. Size the heading, set the padding, pick an accent, then bind the cards to a collection.

Inspector

h1.hero-title

Heading size 40px

Section padding 40px

Accent

Open Terminal

Staging free · {PRICE.terminalSitesFrom}

Every site in a folder. Every agent in the terminal.

StackIDE is the Stacklumen desktop app for Mac and Windows. Each site syncs to a folder both ways. Claude Code, Codex and the other agents run in a real terminal, and in a synced site’s folder they’re already connected to the workspace. Publish is one click away in the status bar.

Download StackIDE Explore StackIDE

Mac (Apple silicon and Intel) and Windows · Sign in to download

One workspace behind every client. From the board to the bill.

Open the Hub See pricing

{PRICE.hubFrom}

What is late, what is unbilled, and which client it belongs to.

Client work by stage, with the timer on the card.

Every client, and what each one has running.

Clients

Who the work is for

Roster 4 clients

{c.n .split(/\s+/) .filter((w) => /^[A-Za-z]/.test(w)) .slice(0, 2) .map((w) => w[0]) .join('')} Meridian Group Law firm Guests invited Onboarding

{c.n .split(/\s+/) .filter((w) => /^[A-Za-z]/.test(w)) .slice(0, 2) .map((w) => w[0]) .join('')} Lumen Dental Dental practice 1 site · 14h this month Active

{c.n .split(/\s+/) .filter((w) => /^[A-Za-z]/.test(w)) .slice(0, 2) .map((w) => w[0]) .join('')} Northwind Logistics Warehousing 2 sites · 9.5h this month Active

{c.n .split(/\s+/) .filter((w) => /^[A-Za-z]/.test(w)) .slice(0, 2) .map((w) => w[0]) .join('')} Alvarez & Co Retail No active work Paused

One plan for the agency across every app, and a plan for each site on its own domain.

One suite, one account. Each app hands its work to the next.

NorthgateSite / Home Desktop Laptop Tablet Phone 65% Preview Publish

Layers

body Body

section Navbar

a .cs-nav__home

nav .cs-nav__links

section Hero

div .cs-hero__copy

h1 .cs-hero__title

p .cs-hero__lede

div .cs-hero__actions

section Feature grid

h2 .cs-features__title

div .cs-features__row

div .cs-card

40 520

Home · Desktop 1200px · base styles

Northgate Work About Journal Enquire

h1.cs-hero__title

Buildings that hold their light.

Inspectorh1

h1 cs-hero__title + class

Default Hover Focus Active

Style Interact Settings

Layout

In parent layout

Spacing

Margin

Padding 480 × 98

Size

Typography

Background

body › section.cs-hero › h1.cs-hero__title snap objects · grid · 65%

Open Terminal

Shipped. {clientCount} client sites, one case study each.

See all work

Engineered for you. Scoped and priced in writing first.

YourVision, the brief a client answers in the Stacklumen Hub, drawn with its questions beside it: company, design style, colour, project type, timeline, and whether the site needs a CMS or logins. The answers fill a one-page brief. On Finish, the brief shows what follows: a first reply within one business day and a written proposal in 3 business days, from $3,000 for a web build or $15,000 for custom software. A short demo plays through the steps; the pause button stops it, and every question can be answered by hand.

YourVision

Step 1 of 6

Let's get to know you

Company

Every answer is saved as you continue.

Start a project

Proposal in 3 business days

Everything the engagement touches. Read it before you send a brief.

See who we build for Every client site, and the case study behind it How a project runs Six steps from brief to launch, with a demo every week Deliberately not in scope Every proposal names what it leaves out, in writing Read the terms Who owns what, before you talk to anyone

Portfolio {CLIENT_WORK.length} client sites

{CLIENT_WORK.map((c) => ( <li class="hm-roster-row"> <img src={c.img} alt="" width="1200" height="900" loading="lazy" decoding="async" /> {c.name} {[c.sector, c.place].filter(Boolean).join(' · ')} Case study </li> ))}

Portfolio {CLIENT_WORK.length} client sites

Stacklumen

Hub

Search Stacklumen ⌘K

Clients

Northwind — six-week build.

Week 4 of 6 · demo Friday

W1 W2 W3 W4 W5 W6

Discovery & scope

Shipped

Design system

Shipped Baselumen

Build & integration

In build Terminal

Review & launch

Up next Baselumen

Stages, not dates. The same board the client sees in their portal — every bar moves when the work does, and nothing is entered twice.

Friday demo, 4:00pm — recorded and shared with the client, with the week's mockups queued for approval.

Stacklumen

Proposal

Not in scope.

Every proposal names what it does not cover, in writing, before anyone signs — so the answer arrives now rather than in week five.

SOC 2

Not certified. Every proposal says so in writing rather than leaving it to be assumed.

HIPAA / BAA

Not currently available. We can scope an engagement to avoid PHI; talk to us if you need a BAA.

Penetration testing

Self-tested internally; there is no third-party penetration test report yet.

DTC advertising

Calibrated for law firms, medical practices and warehousing — not direct-to-consumer.

No project is initiated, and no work is performed, without a signed proposal that supersedes anything shown here.

Northwind Logistics · proposal v2 · Sep 4, 2026

Stacklumen

Terms

Sections

01 Acceptance

02 Use

03 IP & content

04 Data & privacy

05 Billing

06 Warranty & liability

07 Term

08 Legal

09 Contact

Who owns what.

03.01 — Customer content

You retain all rights to the data, files, comments, and other content you submit to the products (“Customer Content”).

03.02 — Stacklumen IP & work product

For deliverables produced under a statement of work, ownership transfers to the client upon full payment as specified in that agreement, subject to Stacklumen’s retained right to use generic, non-confidential learnings and the pre-existing tools, libraries and patterns described above.

03.03 — Feedback license

Suggestions you send us may be used to improve the products, without obligation and without any claim on the result.

These terms supplement, but do not replace, a signed statement of work or other written agreement. Where a signed agreement conflicts with them, the signed agreement controls for that matter.

Last updated May 1, 2026 · v2.0

Building the agentic future ofagency management.

What you set is what ships. To the pixel.

Every site in a folder. Every agent in the terminal.

One workspace behind every client. From the board to the bill.

One suite, one account. Each app hands its work to the next.

Shipped. {clientCount} client sites, one case study each.

Engineered for you. Scoped and priced in writing first.

Everything the engagement touches. Read it before you send a brief.

Building the agentic future of
agency management.