License under GPLv3

Add SPDX headers to the source, a License section to the README, the
OFL notice for the bundled fonts, and ship LICENSE in the Docker image.

.dockerignore

@@ -1,4 +1,5 @@
 *
 !go.mod
+!LICENSE
 !*.go
 !web

Dockerfile

@@ -10,6 +10,7 @@ FROM alpine:3.22
 # git is needed at runtime to clone GitHub repositories.
 RUN apk add --no-cache git ca-certificates && adduser -D -H app
 COPY --from=build /codenavigator /usr/local/bin/codenavigator
+COPY LICENSE /usr/share/licenses/codenavigator/LICENSE
 USER app
 ENV PORT=4177
 EXPOSE 4177

README.md

@@ -77,3 +77,15 @@ docker run --rm -p 4177:4177 codenavigator:latest
 - [GitHub App setup](docs/GITHUB_APP.md): private repos and security alerts
 - [Deployment](docs/DEPLOYMENT.md): Docker, systemd, nginx, operating limits
 - [Development](docs/DEVELOPMENT.md): running, testing, benchmarking, project layout
+
+## License
+
+Copyright (C) 2026 Andy Dixon
+
+CodeNavigator is free software: you can redistribute it and/or modify it under the terms of the
+GNU General Public License as published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version. It is distributed WITHOUT ANY WARRANTY; see
+[LICENSE](LICENSE) for the full text.
+
+The bundled fonts in `web/fonts/` (Archivo Black, Atkinson Hyperlegible, Space Mono) are licensed
+under the SIL Open Font License 1.1; see [web/fonts/OFL.txt](web/fonts/OFL.txt).

github.go

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
+
 package main
 
 import (

github_test.go

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
+
 package main
 
 import (

indexer.go

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
+
 package main
 
 import (

indexer_test.go

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
+
 package main
 
 import (

main.go

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
+
 package main
 
 import (

main_test.go

@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
+
 package main
 
 import (

web/api.mjs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
 export function apiFetch(url, options = {}) {
   const headers = new Headers(options.headers);
   headers.set('ngrok-skip-browser-warning', 'true');

web/app.js

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
 import { LandscapeRenderer, KIND } from './renderer.js';
 import { layoutCity, squarifiedLayout, spatialIndex, pickRay, stepCamera, collide, blockAt, groundHit, flatQuad, wallSigns, folderBlades, folderLabel, facadeQuad, heading, tourStops, encodePlace, decodePlace, joystick, buildNavGrid, routesFrom, spawnWanderers, stepWanderers, alertsByPath, burns, tapeQuads, cityWalls, posterQuads, seededRandom, WALL, ROUTE_KIND, enterBuilding, assignDoors, routeThroughDoors, streetFurniture, furnitureBoxes, DOOR, MOVE, trafficLoops, spawnCars, carBoxes, stepCars } from './city.js';
 import { LabelAtlas, PosterAtlas } from './labels.js';

web/camera.js

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
 // Minimal column-major 4x4 matrix helpers and the cameras built on them. World axes: x right,
 // y "down" the 2D map, z up. Every 3D view renders and projects through one view-projection
 // matrix, so WebGL, the overlay and picking agree exactly.

web/city.js

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
 // Code as a city: folders become districts and blocks separated by roads, files become buildings.
 // Everything here is plain data and maths in metres, so it can be tested without a browser.
 

web/config.js

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
 window.CODENAVIGATOR_CONFIG = {
   // Empty means same origin: the Go server serves both the frontend and the API.
   backendUrl: '',

web/fonts/OFL.txt

@@ -0,0 +1,95 @@
+Copyright 2017 The Archivo Black Project Authors (https://github.com/Omnibus-Type/ArchivoBlack)
+Copyright 2020 Braille Institute of America, Inc.
+Copyright 2016 The Space Mono Project Authors (https://github.com/googlefonts/spacemono)
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.

web/labels.js

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
 // Text for the 3D city: labels are rasterised once into a shared atlas and drawn as textured quads,
 // so signs are depth-tested against buildings instead of floating over them like DOM or 2D overlays.
 

web/people.js

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
 // Residents' identities. Everything is derived from a seed, so the same resident is always the same
 // person. Name data from nymshift's England/Wales name set; occupations and the rest from its taxonomy.
 import { seededRandom } from './city.js';

web/renderer.js

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
 import { perspective, lookAt, multiply, transform, invert, orbitPose, direction, ORBIT_FOV } from './camera.js';
 import { ribbonVertices } from './city.js';
 

web/styles.css

@@ -1,3 +1,5 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+   Copyright (C) 2026 Andy Dixon */
 /* CodeNavigator: a hand-cut dev zine. Flat ink, hard edges, stickers, a little chaos. */
 @font-face { font-family: "Archivo Black"; font-weight: 400; font-display: swap; src: url("./fonts/archivo-black.woff2") format("woff2"); }
 @font-face { font-family: "Atkinson Hyperlegible"; font-weight: 400; font-display: swap; src: url("./fonts/atkinson-400.woff2") format("woff2"); }

webtest/camera.test.mjs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
 import { perspective, lookAt, multiply, transform, invert, orbitPose, ORBIT_FOV } from '../web/camera.js';

webtest/city.test.mjs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
 import { layoutCity, buildingHeight, spatialIndex, rayBox, pickRay, CITY } from '../web/city.js';

webtest/infrastructure.test.mjs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
 import { layoutCity, buildNavGrid, routesFrom, assignDoors, routeThroughDoors, ribbonVertices, streetFurniture, furnitureBoxes, walkable, DOOR, seededRandom, trafficLoops, spawnCars, carBoxes, carPose, stepCars, wallSigns } from '../web/city.js';

webtest/labels.test.mjs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
 import { ShelfPacker } from '../web/labels.js';

webtest/nav.test.mjs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
 import { buildNavGrid, routesFrom, walkable } from '../web/city.js';

webtest/people.test.mjs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
 import { personFor, residentSeed, NAMES, OCCUPATIONS, EMPLOYERS, BLOOD_TYPES, EYE_COLOURS, HAIR_COLOURS } from '../web/people.js';

webtest/place.test.mjs

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (C) 2026 Andy Dixon
 import { test } from 'node:test';
 import assert from 'node:assert/strict';
 import { tourStops, encodePlace, decodePlace, joystick } from '../web/city.js';