diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
new file mode 100644
index 0000000..979e990
--- /dev/null
+++ b/.gitea/workflows/ci.yml
@@ -0,0 +1,29 @@
+name: ci
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  headless-e2e:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install build dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y cmake ninja-build g++ pkg-config libsodium-dev libzstd-dev
+
+      - name: Configure
+        run: cmake -S . -B build -G Ninja
+
+      - name: Build
+        run: cmake --build build -j2
+
+      - name: Headless E2E
+        run: python3 scripts/headless_e2e.py
diff --git a/README.md b/README.md
index 9799d95..b103c0d 100644
--- a/README.md
+++ b/README.md
@@ -111,6 +111,13 @@ python3 scripts/validate_runtime_gate.py \
   --runtime-root /tmp/m2dev-client-runtime-http
 ```
 
+Audio scenario validator:
+
+```bash
+python3 scripts/validate_audio_scenarios.py \
+  --runtime-root /tmp/m2dev-client-runtime-http
+```
+
 ## Build
 
 ```bash
diff --git a/docs/migration.md b/docs/migration.md
index aa5fcf5..83d3bf1 100644
--- a/docs/migration.md
+++ b/docs/migration.md
@@ -195,10 +195,21 @@ effect files and reports 12 concrete missing references:
 - `effect/background/turtle_statue_tree_roof_light01.mse` missing `turtle_statue_tree_roof_light01.mde`
 - `effect/etc/compete/ready.mse` missing `ready.DDS`
 
+It also now includes an audio scenario validator:
+
+- `scripts/validate_audio_scenarios.py`
+
+On the current real client runtime, the audio validator checks the full `*.mss`
+runtime script layer and reports 41 concrete missing audio references. These
+are mostly old cross-pack or wrong-path sound references rather than `.m2p`
+loader regressions.
+
 Those current actor and effect findings are also recorded in:
 
 - `known_issues/runtime_known_issues.json`
 
+The current audio findings are recorded there as well.
+
 That file is now the shared runtime baseline used by the validators and the
 aggregated release gate.
 
diff --git a/docs/release-workflow.md b/docs/release-workflow.md
index 988463e..72f1ff2 100644
--- a/docs/release-workflow.md
+++ b/docs/release-workflow.md
@@ -77,6 +77,8 @@ delivery material.
 - Treat `master.key` as release secret material, not as source code.
 - Archive and retain `verify` and `diff` outputs for each release.
 - Fail the pipeline if `verify` fails or `diff` reports unexpected changes.
+- Run the built-in Linux workflow in `.gitea/workflows/ci.yml` on every push.
+- Run the real client runtime gate separately on a machine that has the client runtime assets available.
 
 ## Production posture
 
diff --git a/docs/testing.md b/docs/testing.md
index 3bfa8f8..79baeb2 100644
--- a/docs/testing.md
+++ b/docs/testing.md
@@ -250,6 +250,7 @@ The gate runs these validators together:
 - `scripts/validate_runtime_scenarios.py`
 - `scripts/validate_actor_scenarios.py`
 - `scripts/validate_effect_scenarios.py`
+- `scripts/validate_audio_scenarios.py`
 
 By default they load the shared baseline:
 
@@ -276,3 +277,29 @@ Current baseline on the real runtime:
 - `world`: `0`
 - `actor`: `5`
 - `effect`: `12`
+- `audio`: `41`
+
+Audio scenario validator:
+
+```bash
+python3 scripts/validate_audio_scenarios.py \
+  --runtime-root /tmp/m2dev-client-runtime-http \
+  --json
+```
+
+This validator checks the runtime audio script layer:
+
+- all `*.mss` files under the real client runtime
+- every `SoundDataNN` reference to `wav/mp3`
+- resolution against the effective virtual audio namespace used by the client
+
+Current real-runtime findings show 41 historical audio content issues. These
+are now recorded in the shared runtime baseline and do not fail the gate unless
+they change.
+
+Built-in CI:
+
+- `.gitea/workflows/ci.yml` builds `m2pack` on Linux
+- the CI workflow runs `scripts/headless_e2e.py`
+- the real client runtime gate remains a separate step because it depends on
+  external client assets not stored in this repository
diff --git a/known_issues/runtime_known_issues.json b/known_issues/runtime_known_issues.json
index 2659b49..7d7e04b 100644
--- a/known_issues/runtime_known_issues.json
+++ b/known_issues/runtime_known_issues.json
@@ -20,5 +20,48 @@
     "effect:reference:ymir work/effect/background/smh_gatetower01.mse:ymir work/effect/monster2/smoke_dust.dds",
     "effect:reference:ymir work/effect/background/turtle_statue_tree_roof_light01.mse:ymir work/effect/background/turtle_statue_tree_roof_light01.mde",
     "effect:reference:ymir work/effect/etc/compete/ready.mse:ymir work/effect/etc/compete/ready.dds"
+  ],
+  "audio": [
+    "audio:reference:metin2_patch_eu3/sound/monster2/zombie_diseased_boss/30.mss:sound/monster/misterious_diseased_boss/damage_1.wav",
+    "audio:reference:metin2_patch_eu3/sound/monster2/zombie_diseased_boss/34.mss:sound/monster/misterious_diseased_boss/damage_1.wav",
+    "audio:reference:metin2_patch_eu3/sound/monster2/zombie_diseased_boss/34_1.mss:sound/monster/misterious_diseased_boss/damage_1.wav",
+    "audio:reference:metin2_patch_w20_sound/sound/monster2/gnoll_commander/back_dead.mss:sound/monster2/troll_mage/common_fall_3.wav",
+    "audio:reference:metin2_patch_w20_sound/sound/monster2/gnoll_commander/back_knockdown.mss:sound/monster2/troll_mage/common_fall_3.wav",
+    "audio:reference:metin2_patch_w20_sound/sound/monster2/gnoll_commander/front_dead.mss:sound/monster2/troll_mage/common_fall_3.wav",
+    "audio:reference:metin2_patch_w20_sound/sound/monster2/gnoll_commander/front_knockdown.mss:sound/monster2/troll_mage/common_fall_3.wav",
+    "audio:reference:metin2_patch_w20_sound/sound/monster2/gnoll_mage/back_dead.mss:sound/monster2/troll_mage/common_fall_3.wav",
+    "audio:reference:metin2_patch_w20_sound/sound/monster2/gnoll_mage/back_knockdown.mss:sound/monster2/troll_mage/common_fall_3.wav",
+    "audio:reference:metin2_patch_w20_sound/sound/monster2/gnoll_mage/front_knockdown.mss:sound/monster2/troll_mage/common_fall_3.wav",
+    "audio:reference:metin2_patch_w20_sound/sound/monster2/gnoll_warrior/back_dead.mss:sound/monster2/troll_mage/common_fall_3.wav",
+    "audio:reference:metin2_patch_w20_sound/sound/monster2/gnoll_warrior/back_knockdown.mss:sound/monster2/troll_mage/common_fall_3.wav",
+    "audio:reference:metin2_patch_w20_sound/sound/monster2/gnoll_warrior/front_dead.mss:sound/monster2/troll_mage/common_fall_3.wav",
+    "audio:reference:metin2_patch_w20_sound/sound/monster2/gnoll_warrior/front_knockdown.mss:sound/monster2/troll_mage/common_fall_3.wav",
+    "audio:reference:sound2/sound/monster2/outlaw/35.mss:sound/monster2/outlaw/fall.wav",
+    "audio:reference:sound2/sound/pc2/assassin/bow/attack.mss:sound/pc2/assassin/bow/attack1.wav",
+    "audio:reference:sound2/sound/pc2/assassin/bow/attack_1.mss:sound/pc2/assassin/bow/attack1.wav",
+    "audio:reference:sound2/sound/pc2/assassin/bow/attack_2.mss:sound/pc2/assassin/bow/attack1.wav",
+    "audio:reference:sound2/sound/pc2/assassin/dualhand_sword/combo_07.mss:sound/pc2/assassin/dualhand_sword/combo7.wav",
+    "audio:reference:sound_m/sound/effect/etc/start/start.mss:sound/monster/chuhen/club_attack.wav",
+    "audio:reference:sound_m/sound/monster/bou/20-1.mss:sound/monster/bou/bou_swing1.wav",
+    "audio:reference:sound_m/sound/monster/fox_ninetail/03.mss:sound/common/walk_grass_n.wav",
+    "audio:reference:sound_m/sound/monster/gupae/20-1.mss:sound/monster/gupae/gup_swing2.wav",
+    "audio:reference:sound_m/sound/monster/gupae/20-2.mss:sound/monster/gupae/gup_swing3.wav",
+    "audio:reference:sound_m/sound/monster/maenghwan/20-1.mss:sound/monster/maenghwan/mah_swing1.wav",
+    "audio:reference:sound_m/sound/monster/thief1/20-1.mss:sound/monster/thief1/th1_act2.wav",
+    "audio:reference:sound_m/sound/monster/thief1/20-1.mss:sound/monster/thief1/th1_swing2.wav",
+    "audio:reference:sound_m/sound/monster/thief1/20-2.mss:sound/monster/thief1/th1_swing3.wav",
+    "audio:reference:sound_m/sound/monster/thief2/20-1.mss:sound/monster/thief2/th2_swing2.wav",
+    "audio:reference:sound_m/sound/monster/thief2/20-2.mss:sound/monster/thief2/th2_swing3.wav",
+    "audio:reference:sound_m/sound/monster/thiefboss1/20-1.mss:sound/monster/thiefboss1/thb1_swing2.wav",
+    "audio:reference:sound_m/sound/monster/thiefboss2/20-1.mss:sound/monster/thiefboss2/thb2_swing2.wav",
+    "audio:reference:sound_m/sound/monster/thiefboss2/20-2.mss:sound/monster/thiefboss2/thb2_swing3.wav",
+    "audio:reference:sound_m/sound/monster/thiefboss3/20-1.mss:sound/monster/thiefboss3/thb3_swing2.wav",
+    "audio:reference:sound_m/sound/pc/assassin/horse/skill_charge.mss:sound/pc/sura/skill/horse_splash.wav",
+    "audio:reference:sound_m/sound/pc/shaman/horse/skill_charge.mss:sound/pc/sura/skill/horse_splash.wav",
+    "audio:reference:sound_m/sound/pc/sura/general/combo_01.mss:sound/pc/sura/general/attack_1.wav",
+    "audio:reference:sound_m/sound/pc/sura/general/combo_02.mss:sound/pc/sura/general/attack_2.wav",
+    "audio:reference:sound_m/sound/pc/sura/general/combo_03.mss:sound/pc/sura/general/attack_3.wav",
+    "audio:reference:sound_m/sound/pc/sura/general/combo_03.mss:sound/pc/sura/general/swing_3.wav",
+    "audio:reference:sound_m/sound/pc/sura/horse/skill_charge.mss:sound/pc/sura/skill/horse_splash.wav"
   ]
 }
diff --git a/scripts/validate_audio_scenarios.py b/scripts/validate_audio_scenarios.py
new file mode 100755
index 0000000..2ade219
--- /dev/null
+++ b/scripts/validate_audio_scenarios.py
@@ -0,0 +1,163 @@
+#!/usr/bin/env python3
+from __future__ import annotations
+
+import argparse
+import json
+import re
+import sys
+from dataclasses import asdict, dataclass
+from pathlib import Path
+
+from known_issues import classify_issue_ids, load_known_issue_ids
+
+
+SOUND_DATA_RE = re.compile(r'^SoundData\d+\s+[0-9.]+\s+"([^"]+)"', re.IGNORECASE)
+
+
+@dataclass
+class AudioCheck:
+    file: str
+    references: list[str]
+    missing_references: list[str]
+
+
+def parse_args() -> argparse.Namespace:
+    parser = argparse.ArgumentParser(
+        description="Validate .mss audio script references against the runtime asset set."
+    )
+    parser.add_argument(
+        "--runtime-root",
+        type=Path,
+        required=True,
+        help="Client runtime root containing assets/.",
+    )
+    parser.add_argument(
+        "--json",
+        action="store_true",
+        help="Emit JSON output.",
+    )
+    parser.add_argument(
+        "--known-issues",
+        type=str,
+        default=None,
+        help="Optional known issues baseline JSON. Defaults to repo known_issues/runtime_known_issues.json if present.",
+    )
+    parser.add_argument(
+        "--strict-known-issues",
+        action="store_true",
+        help="Also fail when the known-issues baseline contains stale entries not observed anymore.",
+    )
+    return parser.parse_args()
+
+
+def normalize_virtual_path(value: str) -> str:
+    value = value.strip().strip('"').replace("\\", "/").lower()
+    for prefix in ("d:/", "d:"):
+        if value.startswith(prefix):
+            value = value[len(prefix):]
+            break
+    return value.lstrip("/")
+
+
+def build_asset_index(runtime_assets: Path) -> set[str]:
+    index: set[str] = set()
+    for path in runtime_assets.rglob("*"):
+        if not path.is_file():
+            continue
+        try:
+            rel = path.relative_to(runtime_assets)
+        except ValueError:
+            continue
+        rel_posix = rel.as_posix().lower()
+        index.add(rel_posix)
+        if len(rel.parts) >= 2:
+            index.add(Path(*rel.parts[1:]).as_posix().lower())
+    return index
+
+
+def parse_mss_references(path: Path) -> list[str]:
+    references: list[str] = []
+    for raw_line in path.read_text(encoding="utf-8", errors="ignore").splitlines():
+        line = raw_line.strip()
+        match = SOUND_DATA_RE.match(line)
+        if match:
+            references.append(match.group(1))
+    return references
+
+
+def validate_mss(path: Path, runtime_assets: Path, asset_index: set[str]) -> AudioCheck:
+    rel = path.relative_to(runtime_assets).as_posix()
+    missing: list[str] = []
+    references = parse_mss_references(path)
+
+    for reference in references:
+        normalized = normalize_virtual_path(reference)
+        if normalized and normalized not in asset_index:
+            missing.append(reference)
+
+    return AudioCheck(file=rel, references=references, missing_references=sorted(set(missing)))
+
+
+def main() -> int:
+    args = parse_args()
+    runtime_root = args.runtime_root.resolve()
+    runtime_assets = runtime_root / "assets"
+    if not runtime_assets.is_dir():
+        raise SystemExit(f"assets dir not found: {runtime_assets}")
+
+    asset_index = build_asset_index(runtime_assets)
+    checks: list[AudioCheck] = []
+    failures: list[str] = []
+    issue_map: dict[str, str] = {}
+    referenced_audio_files: set[str] = set()
+
+    for path in sorted(runtime_assets.rglob("*.mss")):
+        check = validate_mss(path, runtime_assets, asset_index)
+        checks.append(check)
+        for missing in check.missing_references:
+            normalized = normalize_virtual_path(missing)
+            issue_id = f"audio:reference:{check.file}:{normalized}"
+            message = f"{check.file}: missing reference {missing}"
+            failures.append(message)
+            issue_map[issue_id] = message
+        for reference in check.references:
+            normalized = normalize_virtual_path(reference)
+            if normalized:
+                referenced_audio_files.add(normalized)
+
+    observed_issue_ids = set(issue_map.keys())
+    known_path, known_issue_ids = load_known_issue_ids(__file__, "audio", args.known_issues)
+    known_observed, unexpected_issue_ids, stale_known_issue_ids = classify_issue_ids(observed_issue_ids, known_issue_ids)
+
+    result = {
+        "ok": not unexpected_issue_ids and (not args.strict_known_issues or not stale_known_issue_ids),
+        "checked_files": len(checks),
+        "referenced_audio_files": len(referenced_audio_files),
+        "failures": failures,
+        "issue_ids": sorted(observed_issue_ids),
+        "known_issue_ids": sorted(known_observed),
+        "unexpected_issue_ids": sorted(unexpected_issue_ids),
+        "stale_known_issue_ids": sorted(stale_known_issue_ids),
+        "unexpected_failures": [issue_map[issue_id] for issue_id in sorted(unexpected_issue_ids)],
+        "stale_known_failures": sorted(stale_known_issue_ids),
+        "known_issues_path": str(known_path) if known_path else None,
+        "checks": [asdict(check) for check in checks],
+    }
+
+    if args.json:
+        print(json.dumps(result, indent=2))
+    else:
+        print(
+            f"ok={result['ok']} checked_files={result['checked_files']} "
+            f"referenced_audio_files={result['referenced_audio_files']}"
+        )
+        for failure in result["unexpected_failures"]:
+            print(f"FAIL: {failure}")
+        for issue_id in result["stale_known_issue_ids"]:
+            print(f"STALE: {issue_id}")
+
+    return 0 if result["ok"] else 1
+
+
+if __name__ == "__main__":
+    sys.exit(main())
diff --git a/scripts/validate_runtime_gate.py b/scripts/validate_runtime_gate.py
index c4757f1..0e1e78a 100755
--- a/scripts/validate_runtime_gate.py
+++ b/scripts/validate_runtime_gate.py
@@ -69,6 +69,7 @@ def main() -> int:
         "world": script_dir / "validate_runtime_scenarios.py",
         "actor": script_dir / "validate_actor_scenarios.py",
         "effect": script_dir / "validate_effect_scenarios.py",
+        "audio": script_dir / "validate_audio_scenarios.py",
     }
 
     results = {