diff --git a/pyproject.toml b/pyproject.toml
index 9cac199..3cc2f38 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,6 +54,8 @@ allowed-confusables = ["σ"]
 "src/pf1e_simulator/cli.py" = ["T201"]
 # combat.py: CombatEngine.__init__ needs 6 params (rng, grid, states, round_cap, policy, spell_registry)
 "src/pf1e_simulator/combat.py" = ["PLR0913"]
+# runner.py: run_encounter needs 6 params (spec, runs, seed, policy, spell_registry, capture_first_transcript)
+"src/pf1e_simulator/runner.py" = ["PLR0913"]
 
 # ── Basedpyright ──────────────────────────────────────────────────────────────
 [tool.basedpyright]
diff --git a/src/pf1e_simulator/cli.py b/src/pf1e_simulator/cli.py
index 4b83e76..353f935 100644
--- a/src/pf1e_simulator/cli.py
+++ b/src/pf1e_simulator/cli.py
@@ -100,6 +100,11 @@ def main(argv: list[str] | None = None) -> int:
         default=100,
         help="max rounds per battle (default: 100)",
     )
+    parser.add_argument(
+        "--transcript",
+        action="store_true",
+        help="print the turn-by-turn log of the first battle before the report",
+    )
     args = parser.parse_args(argv)
     if not args.side:
         parser.error("at least one --side is required")
@@ -113,9 +118,19 @@ def main(argv: list[str] | None = None) -> int:
         return 2
     try:
         registry = load_spell_registry(SPELLS_DIR)
-        report = run_encounter(spec, runs=args.runs, seed=args.seed, spell_registry=registry)
+        report = run_encounter(
+            spec,
+            runs=args.runs,
+            seed=args.seed,
+            spell_registry=registry,
+            capture_first_transcript=args.transcript,
+        )
     except ValueError as exc:
         print(f"pf1e-sim: {exc}", file=sys.stderr)
         return 2
+    if args.transcript and report.transcript is not None:
+        print("=== Déroulé du premier combat ===")
+        print("\n".join(report.transcript))
+        print()
     print(format_report(report, spec))
     return 0
diff --git a/src/pf1e_simulator/runner.py b/src/pf1e_simulator/runner.py
index df6b29a..da237a6 100644
--- a/src/pf1e_simulator/runner.py
+++ b/src/pf1e_simulator/runner.py
@@ -57,7 +57,12 @@ class CombatantAttrition:
 
 @dataclass(frozen=True)
 class EncounterReport:
-    """Aggregated results of a Monte Carlo encounter."""
+    """Aggregated results of a Monte Carlo encounter.
+
+    `transcript` holds the turn-by-turn log of the first battle when
+    `run_encounter` is called with ``capture_first_transcript=True``; it is
+    None otherwise (the default keeps the report cheap for pure Monte Carlo).
+    """
 
     runs: int
     seed: int
@@ -65,6 +70,7 @@ class EncounterReport:
     draws: int
     avg_rounds: float
     attrition: dict[str, CombatantAttrition]
+    transcript: tuple[str, ...] | None = None
 
     def win_rate(self, side: str) -> float:
         """Fraction of runs won by `side` (closed form, see metrics)."""
@@ -126,11 +132,15 @@ def run_encounter(
     *,
     policy: Policy | None = None,
     spell_registry: dict[str, SpellSpec] | None = None,
+    capture_first_transcript: bool = False,
 ) -> EncounterReport:
     """Run `runs` battles (one SeededRng per run) and aggregate balance metrics.
 
     The spell registry is loaded once (from ``data/spells/`` unless overridden)
     and passed into every ``CombatEngine`` so caster PCs actually cast.
+
+    When ``capture_first_transcript`` is True, the turn-by-turn log of the
+    first battle (``seed + 0``) is stored in ``report.transcript``.
     """
     if runs <= 0:
         msg = "runs must be positive"
@@ -144,6 +154,7 @@ def run_encounter(
     draws = 0
     total_rounds = 0
     totals = {cid: CombatantStats() for cid in ids}
+    transcript: tuple[str, ...] | None = None
     for index in range(runs):
         if index > 0:
             states = build_states(spec)
@@ -156,6 +167,8 @@ def run_encounter(
             policy=policy,
             spell_registry=spell_registry,
         ).run()
+        if capture_first_transcript and index == 0:
+            transcript = result.transcript
         if result.winner is None:
             draws += 1
         else:
@@ -185,4 +198,5 @@ def run_encounter(
         draws=draws,
         avg_rounds=total_rounds / runs,
         attrition=attrition,
+        transcript=transcript,
     )
diff --git a/tests/test_cli.py b/tests/test_cli.py
index c0f2e99..06a0edb 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -57,3 +57,31 @@ def test_cli_rejects_missing_deployment_side(capsys: pytest.CaptureFixture[str])
     rc = main(["--map", str(MAP), "--side", "players", str(GOBLIN), "--runs", "10"])
     assert rc == 2
     assert "monsters" in capsys.readouterr().err
+
+
+def test_cli_transcript_prints_first_battle_log(capsys: pytest.CaptureFixture[str]) -> None:
+    rc = main(
+        [
+            "--map",
+            str(MAP),
+            "--side",
+            "players",
+            str(GOBLIN),
+            "--side",
+            "monsters",
+            str(ORC),
+            "--runs",
+            "10",
+            "--seed",
+            "1",
+            "--transcript",
+        ]
+    )
+    out = capsys.readouterr().out
+    assert rc == 0
+    assert "Déroulé du premier combat" in out
+    assert "initiative:" in out
+    assert "round 1" in out
+    # The balance report must still be printed after the transcript.
+    assert "Rapport d'équilibrage" in out
+    assert out.index("Déroulé du premier combat") < out.index("Rapport d'équilibrage")