Add weekly monthly ranking snapshot generator

ai/tasks/done/TASK-194-add-weekly-monthly-ranking-snapshot-generator.md

@@ -0,0 +1,149 @@
+---
+id: TASK-194-add-weekly-monthly-ranking-snapshot-generator
+title: Add weekly monthly ranking snapshot generator
+status: done
+type: backend
+team: Backend Senior
+supporting_teams:
+  - Arquitecto de Base de Datos
+  - Arquitecto Python
+roadmap_item: foundation
+priority: high
+---
+
+# TASK-194 - Add weekly monthly ranking snapshot generator
+
+## Goal
+
+Implement a manual weekly/monthly ranking snapshot generator plus CLI so PostgreSQL-backed `/api/ranking` can serve persisted global ranking snapshots instead of runtime fallback when operators generate the required combinations.
+
+## Context
+
+`TASK-191` introduced the snapshot-first read path for weekly/monthly global ranking, and `TASK-192` / `TASK-193` stabilized the PostgreSQL path and runtime fallback metrics. The missing piece is still out-of-band generation for `ranking_snapshots` and `ranking_snapshot_items`, so production ranking requests continue to return `snapshot_status=missing`, `freshness=runtime` and `fallback_used=true`.
+
+Preserve the current product identity: Spanish-speaking HLL Vietnam community, military/Vietnam/tactical/sober visual direction and controlled repository evolution.
+
+## Steps
+
+1. Read the listed files first.
+2. Add a manual generator for weekly/monthly ranking snapshots using the existing materialized RCON leaderboard logic and snapshot tables.
+3. Expose a CLI command for one explicit combination; only add matrix generation if it remains small and justified.
+4. Validate generated snapshot reads, preserved runtime fallback behavior and production-oriented run commands.
+5. Document the manual generation workflow and recommended combinations.
+
+## Files to Read First
+
+- `AGENTS.md`
+- `ai/repo-context.md`
+- `ai/architecture-index.md`
+- `backend/app/rcon_historical_leaderboards.py`
+- `backend/app/rcon_annual_rankings.py`
+- `backend/app/routes.py`
+- `backend/app/payloads.py`
+- `backend/app/postgres_rcon_storage.py`
+- `scripts/run-stats-validation.ps1`
+- `docs/ranking-snapshot-read-model-plan.md`
+- `docs/ranking-stats-performance-audit.md`
+- `ai/tasks/done/TASK-191-serve-ranking-from-snapshots-with-runtime-fallback.md`
+- `ai/tasks/done/TASK-192-fix-postgres-ranking-snapshot-schema.md`
+- `ai/tasks/done/TASK-193-fix-postgres-ranking-derived-metrics.md`
+
+## Expected Files to Modify
+
+- `backend/app/rcon_historical_leaderboards.py`
+- `scripts/run-stats-validation.ps1`
+- `docs/ranking-snapshot-read-model-plan.md`
+- `ai/tasks/done/TASK-194-add-weekly-monthly-ranking-snapshot-generator.md`
+
+## Constraints
+
+- Keep the change minimal.
+- Do not modify frontend, assets or design.
+- Do not reactivate Elo/MMR.
+- Do not reintroduce Comunidad Hispana #03.
+- Keep annual ranking behavior unchanged unless a helper can be safely shared without changing annual contracts.
+- Prefer the existing module pattern already used by `backend/app/rcon_annual_rankings.py`.
+- Do not change `/api/ranking` unless strictly necessary for validation-safe compatibility.
+- Keep PostgreSQL as the operational target and preserve SQLite compatibility already present in the shared backend path.
+
+## Validation
+
+Before completing the task ensure:
+
+- `powershell -ExecutionPolicy Bypass -File scripts/run-stats-validation.ps1`
+- `powershell -ExecutionPolicy Bypass -File scripts/run-integration-tests.ps1`
+- local import validation proves:
+  - `generate_ranking_snapshot(timeframe="weekly", server_key="all", metric="kills", limit=20)` creates a snapshot
+  - `get_latest_ranking_snapshot(...)` can read that snapshot
+  - `/api/ranking?timeframe=weekly&server_id=all&metric=kills&limit=20` returns `snapshot_status=ready`
+  - the same response returns `fallback_used=false`
+  - requesting a combination without a snapshot still preserves runtime fallback when enabled
+- document the manual CLI command for local and Docker execution
+- `git diff --name-only` matches the expected scope
+
+## Outcome
+
+Implemented:
+
+- `backend/app/rcon_historical_leaderboards.py`
+  - `generate_ranking_snapshot(...)`
+  - persistence helpers for `ranking_snapshots` and `ranking_snapshot_items`
+  - manual CLI entrypoint:
+    - `python -m app.rcon_historical_leaderboards generate-ranking-snapshot --timeframe weekly --server-key all --metric kills --limit 20`
+- `scripts/run-stats-validation.ps1`
+  - now validates a real generated weekly snapshot through:
+    - direct function import
+    - `get_latest_ranking_snapshot(...)`
+    - `/api/ranking`
+  - confirms generated snapshot reads return:
+    - `snapshot_status=ready`
+    - `fallback_used=false`
+  - confirms runtime fallback still works for a missing combination
+- `docs/ranking-snapshot-read-model-plan.md`
+  - documents the manual command
+  - documents the recommended weekly/monthly/server/metric matrix
+  - documents suggested refresh cadence
+  - documents the expected `ready` vs fallback response states
+
+Supported generation scope:
+
+- `timeframe`
+  - `weekly`
+  - `monthly`
+- `server-key`
+  - `all`
+  - `all-servers`
+  - `comunidad-hispana-01`
+  - `comunidad-hispana-02`
+- `metric`
+  - `kills`
+  - `deaths`
+  - `teamkills`
+  - `matches_considered`
+  - `kd_ratio`
+  - `kills_per_match`
+
+Validations executed:
+
+- `python -m compileall backend/app/rcon_historical_leaderboards.py backend/app/payloads.py backend/app/routes.py backend/app/postgres_rcon_storage.py`
+- direct local import probe for `generate_ranking_snapshot(...)`
+- `powershell -ExecutionPolicy Bypass -File scripts/run-stats-validation.ps1`
+- `powershell -ExecutionPolicy Bypass -File scripts/run-integration-tests.ps1`
+- local CLI probe:
+  - `python -m app.rcon_historical_leaderboards generate-ranking-snapshot --timeframe weekly --server-key all --metric kills --limit 20`
+
+Validation notes:
+
+- Live backend HTTP at `http://127.0.0.1:8000` was not available, so route validation completed through local imports and repository scripts.
+- The manual CLI is unitary per `(timeframe, server-key, metric)` combination.
+- A broader matrix helper was intentionally left out to keep the task small and verifiable.
+
+Recommended Docker command for production:
+
+- `docker compose exec backend python -m app.rcon_historical_leaderboards generate-ranking-snapshot --timeframe weekly --server-key all --metric kills --limit 20`
+
+## Change Budget
+
+- Prefer fewer than 5 modified files.
+- Prefer changes under 200 lines when feasible.
+- Split the work into follow-up tasks if limits are exceeded.

backend/app/rcon_historical_leaderboards.py

@@ -2,6 +2,8 @@
 
 from __future__ import annotations
 
+import argparse
+import json
 import os
 from contextlib import closing
 from datetime import datetime, timedelta, timezone
@@ -29,6 +31,21 @@ LeaderboardMetric = Literal[
     "support",
 ]
 
+SNAPSHOT_GENERATOR_TIMEFRAMES = ("weekly", "monthly")
+SNAPSHOT_GENERATOR_SERVER_KEYS = (
+    ALL_SERVERS_SLUG,
+    "comunidad-hispana-01",
+    "comunidad-hispana-02",
+)
+SNAPSHOT_GENERATOR_METRICS = (
+    "kills",
+    "deaths",
+    "teamkills",
+    "matches_considered",
+    "kd_ratio",
+    "kills_per_match",
+)
+
 RANKING_SNAPSHOT_SQLITE_SCHEMA_SQL = """
 CREATE TABLE IF NOT EXISTS ranking_snapshots (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
@@ -102,6 +119,107 @@ def is_ranking_runtime_fallback_enabled() -> bool:
     return normalized in {"1", "true", "yes", "on"}
 
 
+def generate_ranking_snapshot(
+    *,
+    timeframe: str,
+    server_key: str | None,
+    metric: str,
+    limit: int,
+    replace_existing: bool = True,
+    now: datetime | None = None,
+    db_path: Path | None = None,
+) -> dict[str, object]:
+    """Generate and persist one weekly/monthly ranking snapshot."""
+    normalized_timeframe = _normalize_generator_timeframe(timeframe)
+    normalized_server_key = _normalize_generator_server_key(server_key)
+    normalized_metric = _normalize_generator_metric(metric)
+    normalized_limit = _normalize_limit(limit)
+    anchor = _as_utc(now or datetime.now(timezone.utc))
+
+    resolved_path = initialize_ranking_snapshot_storage(db_path=db_path)
+    connection_scope = _connect_write_scope(resolved_path, db_path=db_path)
+    with connection_scope as connection:
+        window = select_leaderboard_window(
+            connection=connection,
+            server_key=normalized_server_key,
+            timeframe=normalized_timeframe,
+            now=anchor,
+        )
+        window_start = _to_iso(window["start"])
+        window_end = _to_iso(window["end"])
+        existing_snapshot_id = _find_existing_snapshot_for_window(
+            connection=connection,
+            timeframe=normalized_timeframe,
+            server_key=normalized_server_key,
+            metric=normalized_metric,
+            window_start=window_start,
+            window_end=window_end,
+        )
+        if existing_snapshot_id is not None and not replace_existing:
+            snapshot = _get_snapshot_record(connection=connection, snapshot_id=existing_snapshot_id)
+            items = _list_snapshot_items(connection=connection, snapshot_id=existing_snapshot_id)
+            return {
+                "status": "ok",
+                "snapshot": snapshot,
+                "items": items,
+                "source_matches_count": int(snapshot.get("source_matches_count") or 0)
+                if snapshot
+                else 0,
+                "ranked_players": len(items),
+                "skipped_regeneration": True,
+            }
+
+        ranking_rows = _fetch_leaderboard_rows(
+            connection,
+            server_key=normalized_server_key,
+            metric=normalized_metric,
+            limit=normalized_limit,
+            window_start=window["start"],
+            window_end=window["end"],
+        )
+        source_matches_count = _count_matches(
+            connection,
+            server_key=normalized_server_key,
+            start=window["start"],
+            end=window["end"],
+        )
+
+        if existing_snapshot_id is not None:
+            _delete_snapshot(connection=connection, snapshot_id=existing_snapshot_id)
+
+        snapshot_id = _insert_snapshot_record(
+            connection=connection,
+            timeframe=normalized_timeframe,
+            server_key=normalized_server_key,
+            metric=normalized_metric,
+            limit=normalized_limit,
+            source_matches_count=source_matches_count,
+            window_start=window_start,
+            window_end=window_end,
+            generated_at=_to_iso(datetime.now(timezone.utc)),
+            window_kind=str(window["kind"]),
+            window_label=str(window["label"]),
+            item_count=len(ranking_rows),
+        )
+        _insert_snapshot_items(
+            connection=connection,
+            snapshot_id=snapshot_id,
+            rows=ranking_rows,
+            limit=normalized_limit,
+        )
+        snapshot = _get_snapshot_record(connection=connection, snapshot_id=snapshot_id)
+        items = _list_snapshot_items(connection=connection, snapshot_id=snapshot_id)
+
+    return {
+        "status": "ok",
+        "snapshot": snapshot,
+        "items": items,
+        "source_matches_count": source_matches_count,
+        "ranked_players": len(items),
+        "skipped_regeneration": False,
+    }
+
+
 def get_latest_ranking_snapshot(
     *,
     server_key: str | None = None,
@@ -383,6 +501,64 @@ def _find_latest_snapshot(
     return dict(row) if row else None
 
 
+def _find_existing_snapshot_for_window(
+    *,
+    connection: object,
+    timeframe: str,
+    server_key: str,
+    metric: str,
+    window_start: str,
+    window_end: str,
+) -> int | None:
+    row = connection.execute(
+        """
+        SELECT id
+        FROM ranking_snapshots
+        WHERE timeframe = ?
+          AND server_id = ?
+          AND metric = ?
+          AND window_start = ?
+          AND window_end = ?
+        LIMIT 1
+        """,
+        [timeframe, server_key, metric, window_start, window_end],
+    ).fetchone()
+    return int(row["id"]) if row else None
+
+
+def _get_snapshot_record(
+    *,
+    connection: object,
+    snapshot_id: int,
+) -> dict[str, object] | None:
+    row = connection.execute(
+        """
+        SELECT
+            id,
+            timeframe,
+            server_id,
+            metric,
+            window_start,
+            window_end,
+            generated_at,
+            source,
+            snapshot_status,
+            item_count,
+            limit_size,
+            source_matches_count,
+            freshness,
+            window_kind,
+            window_label,
+            error_message
+        FROM ranking_snapshots
+        WHERE id = ?
+        LIMIT 1
+        """,
+        [snapshot_id],
+    ).fetchone()
+    return dict(row) if row else None
+
+
 def _list_snapshot_items(
     *,
     connection: object,
@@ -413,6 +589,115 @@ def _list_snapshot_items(
     return [dict(row) for row in rows]
 
 
+def _delete_snapshot(*, connection: object, snapshot_id: int) -> None:
+    connection.execute(
+        "DELETE FROM ranking_snapshot_items WHERE snapshot_id = ?",
+        [snapshot_id],
+    )
+    connection.execute(
+        "DELETE FROM ranking_snapshots WHERE id = ?",
+        [snapshot_id],
+    )
+
+
+def _insert_snapshot_record(
+    *,
+    connection: object,
+    timeframe: str,
+    server_key: str,
+    metric: str,
+    limit: int,
+    source_matches_count: int,
+    window_start: str,
+    window_end: str,
+    generated_at: str,
+    window_kind: str,
+    window_label: str,
+    item_count: int,
+) -> int:
+    cursor = connection.execute(
+        """
+        INSERT INTO ranking_snapshots (
+            timeframe,
+            server_id,
+            metric,
+            window_start,
+            window_end,
+            generated_at,
+            source,
+            snapshot_status,
+            item_count,
+            limit_size,
+            source_matches_count,
+            freshness,
+            window_kind,
+            window_label,
+            error_message
+        ) VALUES (?, ?, ?, ?, ?, ?, ?, 'ready', ?, ?, ?, 'fresh', ?, ?, NULL)
+        RETURNING id
+        """,
+        [
+            timeframe,
+            server_key,
+            metric,
+            window_start,
+            window_end,
+            generated_at,
+            "rcon-materialized-admin-log",
+            item_count,
+            limit,
+            source_matches_count,
+            window_kind,
+            window_label,
+        ],
+    )
+    row = cursor.fetchone()
+    if row is None or row["id"] is None:
+        raise RuntimeError("Unable to resolve ranking snapshot id after insert.")
+    return int(row["id"])
+
+
+def _insert_snapshot_items(
+    *,
+    connection: object,
+    snapshot_id: int,
+    rows: list[dict[str, object]],
+    limit: int,
+) -> None:
+    for index, row in enumerate(rows[:limit], start=1):
+        item = _build_item(row, index=index)
+        connection.execute(
+            """
+            INSERT INTO ranking_snapshot_items (
+                snapshot_id,
+                ranking_position,
+                player_id,
+                player_name,
+                metric_value,
+                matches_considered,
+                kills,
+                deaths,
+                teamkills,
+                kd_ratio,
+                kills_per_match
+            ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+            """,
+            [
+                snapshot_id,
+                int(item["ranking_position"]),
+                str(item["player_id"]),
+                str(item["player_name"]),
+                float(item["metric_value"]),
+                int(item["matches_considered"]),
+                int(item["kills"]),
+                int(item["deaths"]),
+                int(item["teamkills"]),
+                float(item["kd_ratio"]),
+                float(item["kills_per_match"]),
+            ],
+        )
+
+
 def _fetch_leaderboard_rows(
     connection: object,
     *,
@@ -702,6 +987,14 @@ def _connect_scope(resolved_path: Path, *, db_path: Path | None):
     return closing(connect_sqlite_readonly(resolved_path))
 
 
+def _connect_write_scope(resolved_path: Path, *, db_path: Path | None):
+    if use_postgres_rcon_storage(explicit_sqlite_path=db_path):
+        from .postgres_rcon_storage import connect_postgres_compat
+
+        return connect_postgres_compat()
+    return connect_sqlite_writer(resolved_path)
+
+
 def _empty_payload(
     *,
     server_key: str | None,
@@ -785,6 +1078,40 @@ def _normalize_timeframe(value: str) -> LeaderboardTimeframe:
     return "monthly" if str(value or "").strip().lower() == "monthly" else "weekly"
 
 
+def _normalize_generator_timeframe(value: str) -> str:
+    normalized = str(value or "").strip().lower()
+    if normalized not in SNAPSHOT_GENERATOR_TIMEFRAMES:
+        raise ValueError(
+            f"timeframe must be one of: {', '.join(SNAPSHOT_GENERATOR_TIMEFRAMES)}"
+        )
+    return normalized
+
+
+def _normalize_generator_server_key(server_key: str | None) -> str:
+    normalized = _normalize_snapshot_server_key(server_key)
+    if normalized not in SNAPSHOT_GENERATOR_SERVER_KEYS:
+        raise ValueError(
+            "server_key must be one of: all, all-servers, comunidad-hispana-01, comunidad-hispana-02"
+        )
+    return normalized
+
+
+def _normalize_generator_metric(metric: str) -> str:
+    normalized = str(metric or "").strip().lower()
+    if normalized not in SNAPSHOT_GENERATOR_METRICS:
+        raise ValueError(
+            f"metric must be one of: {', '.join(SNAPSHOT_GENERATOR_METRICS)}"
+        )
+    return normalized
+
+
+def _normalize_limit(limit: object, *, maximum: int = 100) -> int:
+    normalized_limit = int(limit or 1)
+    if normalized_limit < 1:
+        raise ValueError("limit must be greater than zero")
+    return min(normalized_limit, maximum)
+
+
 def _normalize_metric(value: str) -> LeaderboardMetric:
     normalized = str(value or "kills").strip().lower()
     if normalized in {
@@ -909,3 +1236,50 @@ def _to_iso(value: object) -> str:
     if parsed is None:
         parsed = datetime.now(timezone.utc)
     return parsed.astimezone(timezone.utc).isoformat().replace("+00:00", "Z")
+
+
+def _main(argv: list[str] | None = None) -> int:
+    parser = argparse.ArgumentParser(
+        description="Read and generate weekly/monthly ranking snapshots.",
+    )
+    subparsers = parser.add_subparsers(dest="command")
+    generate_parser = subparsers.add_parser("generate-ranking-snapshot")
+    generate_parser.add_argument(
+        "--timeframe",
+        required=True,
+        choices=SNAPSHOT_GENERATOR_TIMEFRAMES,
+    )
+    generate_parser.add_argument("--server-key", default=None)
+    generate_parser.add_argument(
+        "--metric",
+        required=True,
+        choices=SNAPSHOT_GENERATOR_METRICS,
+    )
+    generate_parser.add_argument("--limit", type=int, default=20)
+    generate_parser.add_argument(
+        "--no-replace-existing",
+        action="store_false",
+        dest="replace_existing",
+        help="keep an existing snapshot for the selected exact window and metric scope",
+    )
+    parser.set_defaults(command="generate-ranking-snapshot", replace_existing=True)
+    args = parser.parse_args(argv)
+
+    if args.command == "generate-ranking-snapshot":
+        payload = generate_ranking_snapshot(
+            timeframe=args.timeframe,
+            server_key=args.server_key,
+            metric=args.metric,
+            limit=args.limit,
+            replace_existing=args.replace_existing,
+            db_path=get_storage_path(),
+        )
+        print(json.dumps({"status": "ok", "data": payload}, ensure_ascii=True, indent=2))
+        return 0
+
+    parser.print_help()
+    return 2
+
+
+if __name__ == "__main__":
+    raise SystemExit(_main())

docs/ranking-snapshot-read-model-plan.md

@@ -245,6 +245,72 @@ Operational note after `TASK-191`:
 - runtime fallback remains enabled by default for transition through `HLL_BACKEND_RANKING_RUNTIME_FALLBACK_ENABLED=true`
 - operators can force controlled missing behavior by setting `HLL_BACKEND_RANKING_RUNTIME_FALLBACK_ENABLED=false`
 
+## Manual Generation Workflow
+
+Manual generator entrypoint:
+
+```bash
+python -m app.rcon_historical_leaderboards generate-ranking-snapshot --timeframe weekly --server-key all --metric kills --limit 20
+```
+
+Docker form:
+
+```bash
+docker compose exec backend python -m app.rcon_historical_leaderboards generate-ranking-snapshot --timeframe weekly --server-key all --metric kills --limit 20
+```
+
+Supported manual parameters:
+- `timeframe`: `weekly`, `monthly`
+- `server-key`: `all`, `all-servers`, `comunidad-hispana-01`, `comunidad-hispana-02`
+- `metric`: `kills`, `deaths`, `teamkills`, `matches_considered`, `kd_ratio`, `kills_per_match`
+- `limit`: positive integer, normally `20`
+
+Current implementation note:
+- V1 generator is unitary per command invocation
+- operators should run one command per required `(timeframe, server-key, metric)` combination
+- broad matrix generation can remain a later operational helper if scheduling needs justify it
+
+## Recommended Combinations
+
+Minimum production matrix for parity with the public Ranking filters:
+- weekly + `all-servers` + all six supported metrics
+- weekly + `comunidad-hispana-01` + all six supported metrics
+- weekly + `comunidad-hispana-02` + all six supported metrics
+- monthly + `all-servers` + all six supported metrics
+- monthly + `comunidad-hispana-01` + all six supported metrics
+- monthly + `comunidad-hispana-02` + all six supported metrics
+
+That matrix requires `36` snapshot generations for each refresh cycle.
+
+## Suggested Frequency
+
+Suggested operator cadence:
+- weekly current window: regenerate every `5` to `15` minutes while the active week is changing
+- monthly current window: regenerate every `15` to `30` minutes while the active month is changing
+- previous week and previous month windows: regenerate once after closure or after any historical backfill that changes source coverage
+
+Operational guidance:
+- regenerate after materialized RCON/AdminLog data grows
+- regenerate after manual backfill
+- regenerate after metric SQL changes that affect ranking totals or ordering
+
+## Ready Vs Fallback
+
+Expected API result after successful generation for an exact requested combination:
+- `snapshot_status=ready`
+- `fallback_used=false`
+- `source.read_model=ranking-snapshot`
+
+Expected API result when the requested combination has not been generated yet and fallback remains enabled:
+- `snapshot_status=missing`
+- `fallback_used=true`
+- `freshness=runtime`
+
+Expected API result when the requested combination has not been generated and fallback is disabled:
+- `snapshot_status=missing`
+- `fallback_used=false`
+- `items=[]`
+
 ## Out Of Scope
 
 - backend implementation of the snapshot generator

scripts/run-stats-validation.ps1

@@ -127,6 +127,8 @@ import app.postgres_rcon_storage as postgres_rcon_storage
 import app.rcon_historical_leaderboards as ranking_leaderboards
 
 initialize_ranking_snapshot_storage = ranking_leaderboards.initialize_ranking_snapshot_storage
+generate_ranking_snapshot = ranking_leaderboards.generate_ranking_snapshot
+get_latest_ranking_snapshot = ranking_leaderboards.get_latest_ranking_snapshot
 
 
 def require(condition, message):
@@ -301,6 +303,23 @@ def cleanup_snapshot_fixture(db_path):
     connection.close()
 
 
+def cleanup_generated_snapshot(snapshot_id):
+    if not snapshot_id:
+        return
+    db_path = Path("backend/data/hll_vietnam_dev.sqlite3")
+    connection = sqlite3.connect(db_path)
+    with connection:
+        connection.execute(
+            "DELETE FROM ranking_snapshot_items WHERE snapshot_id = ?",
+            (snapshot_id,),
+        )
+        connection.execute(
+            "DELETE FROM ranking_snapshots WHERE id = ?",
+            (snapshot_id,),
+        )
+    connection.close()
+
+
 health_status, health_payload = read_payload("/health")
 require(health_status == 200, "Route resolver /health should return 200.")
 require(health_payload.get("status") == "ok", "/health payload should be ok.")
@@ -567,6 +586,73 @@ missing_year_ranking_status, _ = read_payload(
 )
 require(missing_year_ranking_status == 400, "Global ranking annual requests without year should return 400.")
 
+generated_snapshot_id = None
+try:
+    generated_snapshot = generate_ranking_snapshot(
+        timeframe="weekly",
+        server_key="all",
+        metric="kills",
+        limit=20,
+        now=datetime(2026, 5, 20, 12, 0, 0, tzinfo=timezone.utc),
+        db_path=Path("backend/data/hll_vietnam_dev.sqlite3"),
+    )
+    generated_snapshot_record = generated_snapshot.get("snapshot") or {}
+    generated_snapshot_id = generated_snapshot_record.get("id")
+    require(generated_snapshot.get("status") == "ok", "Weekly ranking snapshot generation should return ok.")
+    require(generated_snapshot_id, "Generated weekly ranking snapshot should expose snapshot id.")
+    require(
+        generated_snapshot_record.get("timeframe") == "weekly",
+        "Generated weekly ranking snapshot should preserve timeframe.",
+    )
+    require(
+        generated_snapshot_record.get("metric") == "kills",
+        "Generated weekly ranking snapshot should preserve metric.",
+    )
+    latest_generated_snapshot = get_latest_ranking_snapshot(
+        server_key="all",
+        timeframe="weekly",
+        metric="kills",
+        limit=20,
+        db_path=Path("backend/data/hll_vietnam_dev.sqlite3"),
+    )
+    require(
+        latest_generated_snapshot.get("snapshot_status") == "ready",
+        "Generated weekly ranking snapshot should be readable as ready.",
+    )
+    require(
+        latest_generated_snapshot.get("generated_at"),
+        "Generated weekly ranking snapshot should expose generated_at.",
+    )
+    generated_route_status, generated_route_payload = read_payload(
+        "/api/ranking?timeframe=weekly&server_id=all&metric=kills&limit=20"
+    )
+    require(generated_route_status == 200, "Generated weekly ranking route should return 200.")
+    generated_route_data = generated_route_payload.get("data") or {}
+    require(
+        generated_route_data.get("snapshot_status") == "ready",
+        "Generated weekly ranking route should return snapshot_status=ready.",
+    )
+    require(
+        generated_route_data.get("fallback_used") is False,
+        "Generated weekly ranking route should not use runtime fallback.",
+    )
+    require(
+        isinstance(generated_route_data.get("items"), list),
+        "Generated weekly ranking route should return items list.",
+    )
+
+    generated_fallback_status, generated_fallback_payload = read_payload(
+        "/api/ranking?timeframe=weekly&server_id=all&metric=deaths&limit=20"
+    )
+    require(generated_fallback_status == 200, "Generated validation fallback route should return 200.")
+    generated_fallback_data = generated_fallback_payload.get("data") or {}
+    require(
+        generated_fallback_data.get("fallback_used") is True,
+        "Missing weekly deaths snapshot should still use runtime fallback when enabled.",
+    )
+finally:
+    cleanup_generated_snapshot(generated_snapshot_id)
+
 fixture_db_path = build_snapshot_fixture()
 try:
     fixture_weekly_status, fixture_weekly_payload = read_payload(
@@ -610,6 +696,7 @@ print(json.dumps({
         "global-ranking",
         "postgres-ranking-derived-metric-sql",
     "postgres-ranking-schema-path",
+    "ranking-snapshot-generator",
     "ranking-snapshot-ready",
     "ranking-snapshot-missing",
 ],