Simplify telemetry to three game events

README.md

@@ -66,8 +66,7 @@ See [Plugin releases](docs/plugin-releases.md) for the import and beta workflow.
 
 Betas support configurable gameplay, participation, stability and manual-review
 requirements, saved presets, coverage rules and staged rollout. See
-[Beta test plans](docs/beta-test-plans.md) for usage and the session telemetry
-contract used by round and custom-feature checks.
+[Beta test plans](docs/beta-test-plans.md) for usage and the three-event game telemetry contract.
 
 File changes are staged sequentially. Their activation uses rolling restarts:
 by default only **one server across the fleet** can restart or recover at a
@@ -229,32 +228,21 @@ Implementation references (checked September 2026):
 - [T6 map/ruleset combinations](https://github.com/xerxes-at/T6ServerConfigs/blob/master/localappdata/Plutonium/storage/t6/dedicated_zm.cfg)
 - [Plutonium GSC paths](https://plutonium.pw/docs/modding/loading-mods/)
 
-## Round telemetry experiment
+## Game telemetry
 
-Send `POST /api/telemetry` with `Content-Type: application/json` to the Electric
-Cherry host (port 3000 in local development):
+The server script sends JSON to `POST /api/telemetry`:
 
-```bash
-curl http://localhost:3000/api/telemetry \
-  -H 'Content-Type: application/json' \
-  -d '{"event":"round_change","round":17,"server":"t5_zombie_prototype_1","players":4}'
-```
+- `game_start`: server, map, and all players (name and GUID).
+- `round_change`: server, map, round, and all players with kills, headshots, downs, revives, and score.
+- `game_end`: the same fields as round change, with final stats.
 
-The server must already be registered in Electric Cherry. `round` and `players`
-are required nonnegative integers. Success returns HTTP 200 with
-`{ "ok": true, "telemetry": { "server": "...", "round": 17, "players": 4, "receivedAt": "..." } }`.
-Invalid payloads return 400, unknown/destroyed servers 404, and non-JSON content
-types 415. This endpoint uses the app's existing LAN/Tailscale access model;
-there is no API key requirement.
+These reports work with or without an active beta. Electric Cherry records
+the full player data, updates Fleet, and applies gameplay progress to active
+betas automatically. No discovery request or beta-specific fields are needed.
 
-The latest report is saved across app restarts and streamed immediately to the
-dashboard and server detail page, including after browser reconnection. The UI
-labels it as the last reported round with its age: round-change events alone
-cannot detect a stopped script or a match ending. Send the initial round on each
-new match, then each round change. The latest received request wins (including
-lower rounds for new matches); there is no event ordering or history yet.
-Telemetry player counts are displayed with the report and never replace RCON
-occupancy or affect automated restart gates.
+See [Game reporter protocol](docs/beta-test-plans.md#game-reporter-protocol) for
+complete payload examples. Telemetry does not replace RCON's empty-server
+check before an automated restart.
 
 ## Running tests