Archify

Archify Skill

Create professional technical diagrams as self-contained HTML files with inline SVG, a theme toggle, and a built-in image/SVG export menu.

Every diagram ships with a dark/light theme toggle (persists in localStorage, respects prefers-color-scheme), an export menu (copy PNG to clipboard; download PNG/JPEG/WebP rasterized natively at up to 4× resolution; download a dual-theme SVG that follows the embedding host's prefers-color-scheme — ideal for GitHub READMEs), and a CSS-variable color system that keeps both themes consistent.

Setup

No dependency installation is required. The distributed skill includes standalone validators compiled from all five JSON Schemas, so schema and layout validation work immediately after installation. The generated HTML and the renderer runtime are both dependency-free.

Run node bin/archify.mjs doctor to verify an installation. Run node bin/archify.mjs demo [output-directory] to generate a ready-to-open example before creating the first custom diagram.

If you have no shell access at all (e.g. the skill was added as project knowledge), fall back to architecture mode for every request: hand-place SVG into assets/template.html following the Design System below, and run the self-review checklist before delivering.

Choosing a Diagram Type

Trigger phrases: "architecture/system/cloud diagram" → architecture (unless clearly process-oriented). "workflow/flow/process/runbook/approval/CI-CD/incident" → workflow. "sequence/interaction/call chain/who calls whom" → sequence. "data flow/pipeline/ETL/lineage/PII/governance" → dataflow. "state/status/lifecycle/state machine/retry/terminal" → lifecycle.

Mermaid as an Input Dialect

When the user pastes Mermaid code, do NOT try to render or parse it mechanically — read it for structure and lay out from scratch in the matching archify mode:

Drop Mermaid styling; keep only the topology and meaning. You choose grouping, lane order, and what deserves emphasis — that judgment is the product.

Layout principles (read before placing)

Archify's readability comes from spatial narrative, not from drawing every dependency as an arrow. Before you write coordinates or edge lists, plan one clear story:

1. One main path — left → right (architecture) or lane → column (workflow). The reader should trace the happy path without crossing lines.
2. Few labeled edges — label only cross-boundary or non-obvious transitions on the main path. Adjacent steps stay unlabeled.
3. Short side branches — permissions, storage, bots, CI: connect up or down from the nearest node on the main path. Never route a secondary edge diagonally across unrelated components.
4. Cards for detail — policies, tech stack notes, and "also connects to X" belong in summary cards, not as extra arrows.
5. Mode fit — process / approval / tool-call stories → workflow or sequence. Component maps with ≤12 nodes → architecture. If the diagram needs 20+ edges, remove edges until the main path is obvious.

The bundled examples/web-app.architecture.json demonstrates this pattern end to end.

When validation fails on label overlap, read the Suggested fix lines (coordinates / labelAt / labelDy) and apply them directly — do not guess offsets blindly.

Renderer Modes (architecture / workflow / sequence / dataflow / lifecycle)

All five modes follow the same loop:

1. Read first: the schema (schemas/<type>.schema.json) and the complete worked example (examples/*.{architecture,workflow,sequence,dataflow,lifecycle}.json) — copy its patterns instead of guessing field shapes.
2. Write <name>.<type>.json.
3. Render: node bin/archify.mjs render <type> <input>.json <output>.html (paths relative to this skill's folder).
4. Validate the generated artifact: node bin/archify.mjs validate <type> <input>.json --json, or check an existing HTML file with node bin/archify.mjs check <output>.html. This catches malformed SVG output, non-finite SVG values, two-point diagonal arrows, and arrows crossing the legend.
5. If either step fails, the error names the JSON path or the fix (thresholds, valid ranges, which knob to change). Fix the JSON and re-run; never edit the renderer.

Schema violations exit non-zero with path-prefixed messages like /nodes/3 (id/label: "router") must NOT have additional properties. The renderers additionally fail fast on layout problems: node/state overlap (including cross-lane), labels colliding with nodes or other labels, labels wider than their node, out-of-range columns/rows, too-short edges, workflow edges crossing unrelated nodes, and legends outside the viewBox. CJK text is measured at double width automatically.

Set meta.animation: "trace" only when the user asks for motion or a presentation/demo view. It adds lightweight SVG/CSS trace animation to renderer-marked arrows and nodes, respects prefers-reduced-motion, and leaves the default static output unchanged.

Workflow

{
  "schema_version": 1,
  "diagram_type": "workflow",
  "meta": { "title": "Release Workflow", "subtitle": "PR to production", "output": "release.html" },
  "lanes": [
    { "id": "dev", "label": "Developer" },
    { "id": "ci", "label": "CI" },
    { "id": "exceptions", "label": "Exception Handling", "variant": "exception" }
  ],
  "phases": [{ "id": "intake", "label": "Intake", "fromCol": 0, "toCol": 1 }],
  "groups": [
    { "id": "checks", "label": "Parallel checks", "lane": "ci", "fromCol": 1, "toCol": 3, "variant": "emphasis" }
  ],
  "mainPath": ["pr", "build"],
  "nodes": [
    { "id": "pr", "lane": "dev", "col": 0, "type": "frontend", "label": "Open PR", "sublabel": "feature branch" },
    {
      "id": "build",
      "lane": "ci",
      "col": 1,
      "type": "backend",
      "label": "Build",
      "sublabel": "lint + test",
      "tag": "blocking"
    }
  ],
  "edges": [
    {
      "from": "pr",
      "to": "build",
      "label": "webhook",
      "variant": "emphasis",
      "fromSide": "bottom",
      "toSide": "top",
      "route": "drop"
    }
  ],
  "cards": []
}

Layout budget: 6 columns (col 0–5) at fixed x positions [88, 220, 300, 430, 500, 625] — columns 1↔2 and 3↔4 are only 70–80px apart, so default-width (92px) nodes in those adjacent columns of the same lane overlap; skip a column or shrink width. Lane content width is 640px. Omit meta.viewBox — the renderer sizes height to the lane count automatically. Use phases for top-of-diagram story beats, groups to frame parallel work or a branch inside one lane, and lane.variant: "exception" for error/retry/fallback lanes. mainPath is optional but recommended: list the happy-path node ids in order so the renderer can catch missing edges or accidental backward movement. Edge routes: straight, drop (bend between lanes; bias 0–1 picks where), outside-right, return-left, bottom-channel, up-channel, or explicit via points. Keep adjacent-step edges unlabeled; reserve labels for cross-lane transitions, approvals, async traces, and returns.

Sequence

{
  "schema_version": 1,
  "diagram_type": "sequence",
  "meta": { "title": "Cache Miss Request", "subtitle": "auth and cache fallback", "output": "cache-miss.html" },
  "participants": [
    { "id": "web", "type": "frontend", "label": "Web App", "sublabel": "React UI" },
    { "id": "api", "type": "backend", "label": "API", "sublabel": "handler" }
  ],
  "segments": [{ "from": 160, "to": 320, "label": "01 / AUTH" }],
  "messages": [
    { "from": "web", "to": "api", "y": 200, "label": "GET /data", "variant": "emphasis" },
    { "from": "api", "to": "web", "y": 290, "label": "200 JSON", "variant": "return" }
  ],
  "activations": [{ "participant": "api", "from": 190, "to": 300, "type": "backend" }],
  "cards": []
}

Layout budget: participants sit at x = 62 + index×108, so a 920-wide viewBox fits at most 8. Message y must stay within [160, viewBox_height − 83]; messages that share horizontal space need ≥28px vertical separation; arrows need ≥60px horizontal span. segments[].from/to and activations[].from/to are y pixel coordinates, not participant ids. A taller meta.viewBox (default [920, 760]) buys more timeline room. Keep labels short: "GET /path", "verify JWT", "cache miss", "200 JSON".

Dataflow

{
  "schema_version": 1,
  "diagram_type": "dataflow",
  "meta": { "title": "Product Analytics", "subtitle": "events to consumers", "output": "analytics.html" },
  "stages": [{ "label": "Sources" }, { "label": "Ingest" }, { "label": "Store" }],
  "nodes": [
    { "id": "web", "type": "frontend", "label": "Web App", "stage": 0, "row": 0, "sublabel": "clickstream" },
    { "id": "kafka", "type": "messagebus", "label": "Kafka", "stage": 1, "row": 0, "tag": "accepted events" }
  ],
  "flows": [{ "from": "web", "to": "kafka", "label": "events", "classification": "PII touch", "variant": "emphasis" }],
  "cards": []
}

Layout budget: 2–5 stages at x = 100 + stage×215; 5 rows (row 0–4) at y [128, 242, 356, 470, 584]; default node 112×58. Default viewBox [940, 720]. Flow labels are mandatory and asset-like ("clickstream", "identity map", "feature vectors"); put sensitivity in classification ("PII touch", "approved only", "non-PII"). Variants: emphasis = primary path, security = PII/policy/consent, dashed = async/batch.

Lifecycle

{
  "schema_version": 1,
  "diagram_type": "lifecycle",
  "meta": { "title": "Agent Run Lifecycle", "subtitle": "states and terminal outcomes", "output": "agent-run.html" },
  "lanes": [
    { "id": "main", "label": "Lifecycle phases" },
    { "id": "waiting", "label": "Interruptions" },
    { "id": "terminal", "label": "Terminal exits" }
  ],
  "states": [
    { "id": "queued", "type": "start", "label": "Queued", "lane": "main", "col": 0, "step": "01" },
    { "id": "running", "type": "active", "label": "Executing", "lane": "main", "col": 2, "step": "02" },
    { "id": "approval", "type": "waiting", "label": "Needs Approval", "lane": "waiting", "col": 0 },
    { "id": "done", "type": "success", "label": "Completed", "lane": "terminal", "col": 2 }
  ],
  "transitions": [
    { "from": "queued", "to": "running", "variant": "emphasis" },
    {
      "from": "running",
      "to": "approval",
      "label": "needs approval",
      "variant": "security",
      "fromSide": "bottom",
      "toSide": "right"
    },
    {
      "from": "running",
      "to": "done",
      "label": "success",
      "variant": "emphasis",
      "fromSide": "bottom",
      "toSide": "top"
    }
  ],
  "cards": []
}

Layout budget — lane ids are semantic and reserved: main is required and maps to the top phase band (cols 0–4); terminal maps to the bottom outcome band (cols 0–2); every other lane id shares the single middle event band (cols 0–2) — separate same-band states with different col or yOffset. Band headers render from your lane labels. Default viewBox [980, 660]. Keep transition labels event-like and sparse ("retry", "timeout", "cancel"); prefer state tags, step numbers, and summary cards over label-heavy arrows. Put terminal states in the terminal lane so endings are unambiguous.