diagrams-drawio

TypeScript tools for deterministic Diagram IR-to-Draw.io generation, loss-aware round trips, transactional editing, semantic analysis, synchronization, offline publishing, and visual verification.

Built with TypeScript using @maxgraph/core — the official TypeScript successor to mxGraph (the library draw.io is built on) — for accurate XML parsing and absolute coordinate resolution.

Stack

Concern	Choice
Language	TypeScript (ESM, NodeNext)
Package manager	pnpm
XML / model parsing	@maxgraph/core v0.23
Node.js DOM polyfill	jsdom
<mxfile> decoding	pako (base64 + deflate)
Output	YAML (via js-yaml)

Install

cd scripts
pnpm install

Build

cd scripts
task build          # or: pnpm run build
# compiled output → scripts/dist/

Usage

cd scripts
task run -- --file="diagram.drawio" --action=<action> [--page <index>]
# or directly:
node dist/cli/commands.js --file diagram.drawio --action <action> [--page <index>]

# Build from semantic YAML/JSON Diagram IR:
node dist/cli/commands.js --action build --file architecture.yaml --output architecture.drawio

# Loss-aware import and transactional edit:
node dist/cli/commands.js --action import --file architecture.drawio --output architecture.yaml
node dist/cli/commands.js --action edit --file architecture.yaml --spec ../examples/edit-batch.yaml --output edited.drawio

Output is always YAML to stdout.

Actions

Authoring

build

Validates a versioned YAML Diagram IR and emits deterministic native Draw.io XML.

• v1 remains supported for single-page linear diagrams.
• v2 adds multiple pages, containers and semantic kinds, explicit geometry, edge waypoints, provenance/properties/extensions, and typed layout options.
• linear, layered, tree, grid, and manual layouts are supported. Layered/tree layouts use deterministic dependency-aware placement.
• Generated connectors receive deterministic obstacle-aware orthogonal waypoints when a clear route is available.
• Duplicate/reserved IDs, invalid dimensions, unknown parents, and unknown edge endpoints fail before output is written.

See examples/platform-v2.yaml and schemas/diagram-ir-v2.schema.json.

---

Semantic lifecycle

Action	Purpose	Key options
import	Loss-aware Draw.io to Diagram IR v2	`--output model.yaml
edit	Atomic stable-ID edit batch	--spec, --output, --dry-run
views	Linked executive/system/deployment/dataflow/security views	--views, --output
query	Kind/property filtering and deterministic shortest paths	--kind, --property, --from, --to
test	Seven built-in architecture policies	--spec, --strict
what-if	Failure propagation with isolation boundaries	--fail
sync	Three-way synchronization preserving manual presentation	--base, --spec, --output, --prune, --dry-run
story	Self-contained accessible offline HTML	--output, optional --fail
doctor	Report optional backend availability without launching it	no --file required

Commands fail closed on ambiguous identities, invalid view/policy names, input/output aliases, and malformed operations. See references/semantic-lifecycle.md for complete contracts and examples.

---

Native service libraries

The combined package also exposes tested TypeScript service APIs for capabilities that are not registered as CLI actions:

Family	Implemented native services
Safe source importers	Python, JavaScript/TypeScript, Go, Rust, Terraform, Kubernetes, Docker Compose, SQL, OpenAPI, and CI job DAG subsets
Toolbox	Five themes, generic offline shape search, Mermaid and Markdown reverse transforms, semantic diff, strict relabeling, and accessible metric heatmaps
Specialized profiles	C4, sequence, tube map, executive compression, runbook HTML, timelapse, and dependency-ordered build-up

These are conservative, bounded service contracts rather than claims of complete language parsers or peer-compatible command-line interfaces. See references/agents365-capability-coverage.md for the strict 42-tool comparison and remaining gaps.

---

Inventory

summary

Parses all pages (tabs) in the .drawio file and returns a full inventory of shapes and edges per page. Delegates per-page data to the same logic as page-summary.

Output: pageCount, pages[] (each page has the same structure as page-summary)

---

page-summary

Parses a single page. Use --page <index> (0-based, default 0).

Output: pageCount, pageIndex, pageName, page (width/height), summary (shapeCount, edgeCount, contentRight, contentBottom), shapes[], edges[]

---

page-hierarchy

Reads parentId from each shape and builds a recursive containment tree:

• Depth 0 — layers / top-level containers (direct children of the canvas)
• Depth 1 — subsystems / groups inside a layer
• Depth 2+ — leaf components and nested elements

Output: summary (totalShapes, maxDepth, depthCounts), tree[] (recursive: id, label, depth, childCount, children[])

---

page-connectors-summary

Returns a summary of all connectors (edges) on the page, classified by type and connectivity.

Connector types: directed (both endpoints connected), partial (one missing), floating (both missing)

Output: summary (total, directed, partial, floating, labelled, unlabelled, withWaypoints, straight), connectors[] (id, label, sourceId, sourceLabel, targetId, targetLabel, waypointCount, type)

---

Validation

quality

Runs objective visual-quality checks across every page: page clipping, likely text overflow, placeholder text, external image URLs, palette spread, page density, and edge density. Findings have explicit error or warning severity; the action never invents a minimum defect count.

Output: summary (pages, shapes, edges, errors, warnings), issues[]

---

page-connectors-validation

Detects two categories of layout defects on the first page:

1. Connector-shape overlaps — a connector segment passes through a shape it is not connected to
2. Connector crossings — two connectors intersect at an interior point

Uses 2 px tolerance. Output: summary (connectorShapeOverlaps, connectorCrossings, totalIssues), issues[]

---

page-labels-validation

Validates shape labels and flags:

1. empty_label — shape has no label (whitespace counts as empty)
2. duplicate_label — two or more shapes share the same label
3. long_label — label exceeds 80 characters

Edges/connectors are excluded. Output: config (maxLabelLength), summary (emptyLabels, duplicateLabels, longLabels, totalIssues), issues[]

---

page-shape-bbox-validation

Detects shapes whose bounding boxes overlap each other. Parent-child containment is intentional and is not flagged. Uses 2 px tolerance.

Output: summary (totalShapes, overlappingPairs), issues[] (shapeAId, shapeALabel, shapeBId, shapeBLabel, overlapX, overlapY)

---

page-orphans

Finds disconnected elements:

1. isolated_shape — shape with no edges connected to it
2. dangling_connector — edge missing its source and/or target shape

Output: summary (isolatedShapes, danglingConnectors, totalIssues), issues[]

---

Layout

page-recommendations

Computes the bounding box of all shapes and recommends the smallest standard landscape page size that fits with an 80 px margin (first page).

Standard sizes: A4 (1169×827), A3 (1654×1169), A2 (2339×1654), A1 (3307×2339). Falls back to custom rounded size.

Output: currentPage (width, height, orientation), contentBbox, required (min size needed), recommendedPage (name, width, height), checks (contentFitsCurrentPage, hasAdequateMargin, isLandscape)

---

Supported file formats

• Bare <mxGraphModel> XML files
• <mxfile><diagram>…</diagram></mxfile> wrappers (draw.io desktop format, base64+deflate encoded, multi-page supported)
• Loss-aware semantic import preserves unknown wrapper/page/model XML in explicit $drawio envelopes for deterministic round trips