Mossy
A field atlas for connected work. Explore the connections between
organisations, projects, funders, people, places and ideas, with a source
record behind each recorded relationship.
Mossy is an Apache-2.0 licensed, local-first, general-purpose
technical alpha. It is not a product for one farming organisation: the
Progressive Farming Trust visual example and fictional neighbourhood network
are optional demonstrations.
What you can do
- Bring data: one Add data flow for 360Giving grants, the Charity
Commission register, Companies House, Kumu and any spreadsheet. Files join
on registered numbers and other identifiers, never on names, and you check
what each file adds before anything is saved. See Getting data in.
- Five lenses: explore the same records through Network, Map, Themes,
Funding and Timeline, with shared search, filters and selection.
- Follow evidence: inspect original source references and trace up to
five steps through recorded relationships.
- Keep claims honest: solid ink is recorded in a source; dotted pencil
is inference or suggestion; soft wash is only visual grouping.
Sharing a funder is not evidence of collaboration.
- Review suggestions: confirm an inferred relationship with a reviewer,
date and reason. The approval is a separate local annotation, not an edit
to the original import.
- Use complete data: large network and full funding analysis continue to
use the existing background workers. The older specialised studio remains
available through Detailed tools & full network.
- Back up and share: export local maps, perspectives and full-dataset
backups. Optional publishing needs a configured deployment and a privacy
review. A copied atlas URL does not contain browser-local graph data.
What is still changing
This is the first implementation slice of the Field Atlas proposal, not
the completed renderer migration. The Map lens plots source-given
coordinates with MapLibre, and approximate places from postcodes as hollow
marks. Themes groups by
source tags, not on-device semantic embeddings. Funding currently shows
recorded links rather than the proposed DuckDB-backed grant flows. The new
network uses the established worker/WebGL/Canvas implementation for large
graphs while a sigma.js comparison is prepared. Portable static stories,
reviewable community correction queues and live open-source profiles are
still planned.
See the Field Atlas implementation and migration plan
for shipped boundaries and remaining work.
Try it
Requires Node.js 22+ and npm.
git clone https://github.com/tomcwxyz/Mossline.git
cd Mossline
npm ci
npm run dev
Open http://localhost:3000, choose an example or import your data.
No hosted account, API key or model is needed for ordinary exploration.
Validate a change
npm run test
npm run typecheck
npm run build
npm run test:e2e
Playwright tests require Chromium (npx playwright install chromium).
See CONTRIBUTING.md and AGENTS.md for
contribution guidance.
Data, trust and portability
Mossy is local-first. Browser-saved maps and full funding datasets use
different storage layers and are not synced to other devices. Keep source
exports and download backups before clearing browser storage; see
Recovery.
The original graph is canonical: visual groups, inferred links, local
reviewer annotations and saved layouts must not silently rewrite it.
An inferred connection never increases a recorded degree or funding total.
A place name does not constitute coordinates; a postcode gives only an
approximate place, marked as such. Approximate places use the ONS Postcode
Directory: contains OS data © Crown copyright and database right 2026;
contains Royal Mail data © Royal Mail copyright and database right 2026;
source: Office for National Statistics, Open Government Licence v3.0. AI features, where
configured, are optional and require a deliberate decision to use them.
Project references
Architecture ·
Getting data in ·
Field Atlas design implementation ·
Recovery and backups ·
Hosted publishing ·
Roadmap ·
Development history
MCP: npm run mcp starts a read-only local stdio server;
MOSSLINE_DATA_FILE can point it at an exported graph document.
See Architecture before enabling external connections.
Licence: Apache-2.0. Source images and demonstration artworks may have
different rights and must be treated separately.
