Archlang MCP server

Read from the package source without running it. The installed server may list more.

• compile

  Compile ArchLang `.arch` source (or a Plan-JSON object) to an SVG floor plan, or to a zero-dependency ASCII text plan (format:"txt"). Returns the rendered output plus diagnostics \u2014 each a byte span, line/col, catalogued E_/W_ code, and a machine-applicable fix. Errors are DATA, never exceptions: read `diagnostics` and correct the source. A MULTI-STOREY plan (`level <n> { \u2026 }`) is a set o

• complete

  Completion items in scope at a source BYTE offset (the LSP `completion()` core): keywords, element names, ids, enum values \u2014 for structured or assisted authoring.

• describe

  Semantic facts about a plan without rendering: rooms (areas, bboxes, adjacency, uses, and the exact shape \u2014 `floor_polygon` for a `room polygon`, `floor_circle` for a `room circle`, whose area is exact \u03C0R\xB2), doors (what they connect), windows, circulation (walk distance / bottleneck width / detour), zones, storeys (`levels[i]` carries the same facts per floor) with the shafts that joi

• fix

  Apply the machine-applicable fixes a compile attaches to its diagnostics \u2014 the SYNTACTIC corrector (off-wall openings \u2192 the attachment form, out-of-range positions clamped, \u2026), distinct from `repair`'s geometric solver. Bounded fixpoint (\u22644 passes; a pass that raises the error count is rolled back). `unsafe:true` also applies `maybe-incorrect` fixes. Returns { ok, passes, appli

• lint

  Advisory `W_*` soundness warnings as data: unreachable room, windowless bedroom, too-narrow door, blocked doorway, furniture through a wall, circuitous path, and more. `profile` selects a ruleset (e.g. "residential-basic", "accessibility-advisory").

• repair

  The explicit source-to-source corrector (ADR 0006): push furniture out of walls / doorways / swing arcs, separate overlaps, relocate wrong-room fixtures, snap floating pieces to walls. Returns corrected `.arch` source + a change log. It NEVER adds doors or windows \u2014 that is a design choice; use `suggest` for topology.

• score

  The continuous intent-satisfaction METER: check a brief's intent JSON (per /intent.schema.json) against a plan and report how much it satisfies. Returns { ok, satisfied, total, score, subscores, violations } where `score` is satisfied/total in [0,1] (an empty intent scores 1). It MEASURES, it never gates \u2014 so you can watch a plan approach the brief across edits. A malformed intent returns `{

• suggest

  Advisory topology suggestions as DATA \u2014 never applied (ADR 0005). For a room with no path back, a building with no entrance, a bath reachable only through a bedroom, or a windowless bedroom, returns ready-to-paste `door`/`window` statements (attachment form, furniture-aware) plus a rationale, for the agent to choose among and insert.

• validate

  The ship gate: parse + resolve + lint in one pass, no render. `strict:true` makes advisory warnings fail too. Optional `graph` checks the plan's interior-door adjacency against an intended room graph (`{ room: [neighbours] }`); a mismatch fails. Optional `intent` (a brief's expectations per /intent.schema.json) is checked against the plan \u2014 a failing GATING assertion (room count / existence /

• Code scan5 source files scanned25/25
• –Live reliabilityno gateway calls yet and no remote to proben/a
• –Tool poisoningtools not inspected (local package is not executed); not countedn/a
• Auth qualitylocal package, no credentials required12/15
• Maintenancelast push 2 days ago15/15
• Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10

Archlang: common questions

Is Archlang MCP server safe?

Yes, by our scan: it is graded A (92/100). Read the Archlang safety report

How do I install Archlang?

It runs on your machine. Copy the Claude Code, Claude Desktop or Cursor config from the install section.

Does Archlang need an API key?

Not as far as the registry entry and our scan can tell: no credentials are declared or required.

Is Archlang maintained?

The last commit was 2 days ago (2026-09-17). The latest release is v0.2.16.

What can I use instead of Archlang?

Servers from other publishers that do the same job: Semiotic MCP server.