signalk-tides

A SignalK plugin that provides offline tidal predictions for the vessel’s position, powered by Neaps.

Since 2.0, predictions are computed locally from harmonic constituents — no network access or API keys required.

Installation

Install signalk-tides from the SignalK Appstore or manually by running npm install signalk-tides in the SignalK server directory (~/.signalk).

Usage

This plugin depends on navigation.position.

It publishes the following tide data:

environment.tide.heightHigh
environment.tide.timeHigh
environment.tide.heightLow
environment.tide.timeLow
environment.tide.heightNow
environment.tide.stationName
environment.tide.state — tide trend, rising or falling
environment.tide.timeToNextExtreme — seconds until the next high or low water

Tides API

The plugin mounts the Neaps API at /signalk/v2/api/tides, which serves station search, extremes, and timeline predictions. The synthetic station vessel/default resolves to the configured…

score = signal / reach signal = 0.25·commit_velocity // commits in last 90 days (cap 30) + 0.20·contributor_work // unique authors × velocity (cap 100) + 0.20·issue_resolution // closed ÷ total issues + 0.20·fork_ratio // forks ÷ stars (proxy for real usage) + 0.10·release_cadence // releases in 90 days (cap 3) + age_bonus // +0 to +0.30 after 6 months + homepage_bonus // +0.05 if homepage is set reach = log₁₀(stars + watchers + 10)█

health = 0.35·recency // days since last commit (90d decay) + 0.25·cadence // commit rhythm consistency + 0.20·issue_health // closed ÷ total issues + 0.20·pr_health // merged ÷ total PRs█

Healthy 80 – 100 active, responsive, regular releases Stable 60 – 79 maintained, steady, no alarms Quiet 40 – 59 slowing down — watch this one At Risk 0 – 39 going dark · candidate for rescue█

solo_builder one person holds > 80% of commits (last 180d) needs_contributors has open "help wanted" or "good first issue" labels hidden_gem < 100 stars · active in last 3 months · documented legacy_hero repo > 5 years old · committed this year fork_magnet forks/stars > 0.5 · used as template or dependency release_machine 5+ releases in the last 90 days under_pressure > 10 open issues · ≤ 2 contributors · health ≥ 60 community_watch watchers > stars · devs tracking before the public community_hub GitHub Discussions enabled · > 20 discussions funded maintainer has active funding channel█