Adds a background demo user (`bruno`) plus two pg-boss jobs that generate
public trekking routes and activities in inner Berlin and prune them
after 14 days. Disabled by default everywhere; flip `DEMO_BOT_ENABLED`
only in prod.
- Schema: `synthetic` boolean on routes + activities
- `ensureDemoUser()` idempotent insert + badge on /users/bruno
- Generation gate: 07-21 Berlin local, p=0.12, 40-route cap in 14d
- Initial 4-walk backfill on first enable; retention via daily prune
- Prometheus gauges `demo_bot_synthetic_routes_total` / `_activities_total`
- Unit + DB-gated integration + E2E tests
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Two stacked OpenSpec change proposals for a demoable social layer,
with scope deliberately minimal ("enough to send a URL and have it
open to real-looking content without signup"):
1. public-content-visibility
- Adds visibility enum {private, unlisted, public} on routes +
activities, defaulting to private for every existing row.
- Detail pages (/routes/:id, /activities/:id) become accessible to
logged-out visitors when content is public or unlisted; private
→ 404 (not 403) to avoid existence leaks.
- Broadens /users/:username into a public profile listing only
public routes + activities; 404s when there's no public content
to prevent account enumeration.
- Open Graph / Twitter Card meta on public detail + profile pages.
- Visibility selector in the owner's edit flow.
- Out of scope: follow/follower, cross-user feed, reactions,
federation.
2. demo-activity-bot (depends on #1)
- A single bot user, Bruno the trail dog, seeded on worker startup
when DEMO_BOT_ENABLED=true. Reserved username, sentinel email,
no credentials.
- pg-boss recurring job fires every 90 min, decides-to-walk with
p=0.12 during 07:00-21:00 local, yielding ~2-3 walks/day at
organic times.
- Each walk: random start + end within inner-Berlin bbox, trekking
only (dogs don't ride bikes), 2-12 km crow. BRouter plans the
route; the route GPX is also attached as the activity's trace.
- Everything inserted with visibility=public, synthetic=true.
- Daily prune deletes synthetic rows > DEMO_BOT_RETENTION_DAYS old
(default 14). Hard cap of 40 items/14d protects against runaway
growth.
- Small "🐕 demo account" badge on /users/bruno for honesty.
Both changes are artifacts only — no code lands with this PR. Apply
in order after merge: public-content-visibility first, then
demo-activity-bot.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
