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Defer V3-08/V3-09, add V3-17 to investigate self-hosted OSRM

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Per request: V3-08's routing-engine direction is decided (self-hosted OSRM over a hosted API or the public demo instance) but standing one up is split into its own ticket, V3-17, since provisioning a server is different work from the app code that calls it. V3-08 and V3-09 are marked Deferred pending V3-17.

V3-17 also names a real tension worth flagging rather than quietly ignoring: this backlog's own organizing principle is 'v3 is everything buildable with no server,' and a self-hosted OSRM instance is a server -- so V3-08/V3-09 sit oddly under docs/v3/ once V3-17 exists. Left unresolved by design (a documentation call for later), noted in both V3-17 and BACKLOG.md's v4 section rather than silently renumbering tickets that are already cross-referenced throughout the docs.
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uhryniuk
2026-08-17 19:56:44 -05:00
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@@ -24,8 +24,8 @@ backup are v4 — see [../BACKLOG.md](../BACKLOG.md).
| [V3-05](V3-05-mounted-mode.md) | Mounted (handlebar) mode | M | V3-04 | Done |
| [V3-06](V3-06-notification-stats.md) | Live stats in the notification | S | — | Done |
| [V3-07](V3-07-route-drawing.md) | Route drawing (pins, straight lines) | M | — | Done |
| [V3-08](V3-08-road-routing.md) | Road-snapped routing and ETA | L | V3-07, V3-01 | Not started |
| [V3-09](V3-09-route-following.md) | Follow a planned route | M | V3-04, V3-08 | Not started |
| [V3-08](V3-08-road-routing.md) | Road-snapped routing and ETA | L | V3-07, V3-01, **V3-17** | Deferred (needs V3-17) |
| [V3-09](V3-09-route-following.md) | Follow a planned route | M | V3-04, V3-08 | Deferred (needs V3-08) |
| [V3-10](V3-10-trip-splitting.md) | Trip splitting | S | — | Done |
| [V3-11](V3-11-offline-tiles.md) | Offline tile pre-download | M | V3-04 | Partially done (pipeline shipped; needs aeroplane-mode device verification) |
| [V3-12](V3-12-crash-reporting.md) | Crash reporting | S | — | Partially done (code only; needs a real Sentry DSN + release build) |
@@ -33,6 +33,7 @@ backup are v4 — see [../BACKLOG.md](../BACKLOG.md).
| [V3-14](V3-14-gpx-interop.md) | GPX interoperability | S | V3-01 | Partially done (code only; needs real-device verification) |
| [V3-15](V3-15-auto-pause.md) | Auto-pause | M | V3-13 *(gated)* | Not started |
| [V3-16](V3-16-visual-identity.md) | Visual identity | M | V3-04, V3-05 | Partially done (token-level identity shipped; needs outdoor device verification) |
| [V3-17](V3-17-osrm-hosting.md) | Self-hosted OSRM: investigate and stand one up | M | — *(needs a server — see the ticket's own note on the v3/v4 boundary)* | Not started |
## Dependencies
@@ -40,15 +41,20 @@ backup are v4 — see [../BACKLOG.md](../BACKLOG.md).
V3-01 ──┬────────────► V3-08 ──► V3-09
└──► V3-14 ▲
V3-07 ──────► V3-08 │
V3-17 ──────► V3-08 │
V3-02 ──► V3-03 │
V3-04 ──┬──► V3-05 ──┬───────┘
├──► V3-11 └──► V3-16
└──► V3-09
V3-13 ──► V3-15 (gate: may close unbuilt)
no dependencies: V3-01 · V3-02 · V3-04 · V3-06 · V3-07 · V3-10 · V3-12
no dependencies: V3-01 · V3-02 · V3-04 · V3-06 · V3-07 · V3-10 · V3-12 · V3-17
```
**V3-08/V3-09 are deferred, on request**, pending V3-17 (self-hosted OSRM). See V3-17's
own note on why that also puts them in tension with this document's v3/v4 boundary —
unresolved by design, not an oversight.
## Three that carry more weight than their size suggests
**V3-01** ships the port's **first real migration**. The destructive fallback is gone, so
@@ -56,7 +62,9 @@ getting `addColumn` plus a v1-database test right matters more than the feature
V3-07 and V3-09 both add migrations behind it.
**V3-08** forces a routing-engine decision with ongoing cost and vendor implications.
Behind a `RoutingService` interface, mirroring what `LocationSource` did for GPS.
Behind a `RoutingService` interface, mirroring what `LocationSource` did for GPS. The
direction is decided (self-hosted OSRM); V3-17 does the actual standing-up, and V3-08 is
deferred until it exists.
**V3-13** is not code. It answers the three questions that have been open since v2, and
**V3-15 may close unbuilt** as a result — a legitimate and probably likely outcome.