diff --git a/docs/ARCHITECTURE.md b/docs/ARCHITECTURE.md
index 0b47dc80..905bffe6 100644
--- a/docs/ARCHITECTURE.md
+++ b/docs/ARCHITECTURE.md
@@ -2565,11 +2565,11 @@ All remaining open issues are enhancements (no bugs as of 2026-07-18). Prioritiz
 ### #291 — SpecKit-style preset composition (layered template resolution) — CLOSED
 **COMPLETE (PRs #370/#371/#372, 2026-07-18)**: Full `mapify preset` sub-command group. Commands: `list`, `add --from <path>`, `remove`, `enable`, `disable`, `resolve <template>`, `render <template>`, `set-priority <id> <n>`. `.map/presets/<id>/` directory structure with `manifest.json` (id/title/version/strategies) and `.state.json` sidecar for enabled/priority state. Four composition strategies in `mapify preset render`: replace/prepend/append/wrap (wrap uses `{CORE_TEMPLATE}` placeholder). 3-tier resolution: project overrides → enabled presets (priority-ordered) → core templates. 57 tests in `tests/test_preset_commands.py`. Extension hooks and remote catalog remain as optional future work.
 
-### #363 — Architecture deepening report (`/map-architecture` skill)
-New opt-in skill that ranks codebase areas by recent git hotspot + design friction, generates a candidate report (HTML or Markdown+Mermaid under `.map/<branch>/architecture-report/`), and holds off implementation until the user picks a candidate. First slice: create `src/mapify_cli/templates_src/skills/map-architecture/SKILL.md.jinja` + register in skill-rules.json. No Python code in slice 1 — just the workflow instructions.
+### #363 — Architecture deepening report (`/map-architecture` skill) — CLOSED
+**COMPLETE (PR #373, 2026-07-18)**: `/map-architecture` skill shipped. Three-phase workflow (scope → report → select): accepts optional `<module-path-or-pain-point>` argument or falls back to `git log --since="90 days ago"` hotspot analysis; scores candidates on 6 design-friction signals (change frequency, shallow interface, low locality, seam leakage, hard-to-test, ADR conflict; 0–2 each); writes `.map/<branch>/architecture-report/report.md` (Markdown+Mermaid with before/after diagrams) plus `report.json` machine-readable companion; presents top-3 and waits for user to pick ONE before any code changes; hands off to `/map-plan` (score ≥ 6) or `/map-fast` (score < 6). Registered in skill-rules.json; 289+43 tests pass. Optional future work: Python tooling for automated report generation scripting.
 
-### #353 — Eval-gated prompt profile canary and rollback
-Local-first prompt lifecycle: versioned profiles under `.map/prompt-profiles/`, `active.json` pointer, `mapify prompt-profile list/diff/activate/rollback` commands. Integrates with skill-eval (trigger changes) and trajectory eval (#351, for body changes). First slice: manifest format + `mapify prompt-profile list`. Key constraint: do not edit generated trees as the durable authoring source.
+### #353 — Eval-gated prompt profile canary and rollback — CLOSED (slice 1)
+**COMPLETE (PR #374, 2026-07-18)**: `mapify prompt-profile list` command shipped. Manifest format: `.map/prompt-profiles/<id>/manifest.json` (required: `id`, `title`, `version`; optional: `description`, `owner`, `targets`, `eval_requirements`, `rollback_notes`). Active pointer: `.map/prompt-profiles/active.json` (`{"active": "<id>"|null}`). `list` command shows table with ID/title/version/status/description and active marker; `--json` for machine-readable output; stale-pointer warning when `active.json` names a non-existent profile. 20 tests in `tests/test_prompt_profile_commands.py`. Future slices: `diff`, `activate`, `rollback`, `report` commands + integration with #291 preset composition as rendering substrate.
 
 ### #339 — GRACE semantic code-contract anchor eval
 Eval harness comparing inline code contracts vs prompt-injected vs no-anchor variants for bug-fix workflows. Variants: baseline, inline (LEX/MIN), prompt-injected (INJ), stale (LIE). First slice: fixture structure + report schema (JSON). No external model calls required for slice 1.
diff --git a/src/mapify_cli/__init__.py b/src/mapify_cli/__init__.py
index 0c989248..24011128 100644
--- a/src/mapify_cli/__init__.py
+++ b/src/mapify_cli/__init__.py
@@ -181,6 +181,13 @@ def create_ssl_context():
 
 app.add_typer(preset_app, name="preset")
 
+prompt_profile_app = typer.Typer(
+    name="prompt-profile",
+    help="Manage MAP prompt profiles — versioned, eval-gated prompt lifecycle.",
+)
+
+app.add_typer(prompt_profile_app, name="prompt-profile")
+
 
 def version_callback(value: bool):
     """Callback to show version and exit."""
@@ -2214,6 +2221,113 @@ def preset_set_priority(
     console.print(f"[green]Preset '{preset_id}'[/green] priority set to {priority}.")
 
 
+# Prompt profile commands
+
+_PROFILE_MANIFEST_KEYS = ("id", "title", "version")
+
+
+def _prompt_profiles_dir(project_dir: Path) -> Path:
+    return project_dir / ".map" / "prompt-profiles"
+
+
+def _read_profile_manifest(profile_path: Path) -> dict[str, Any] | None:
+    manifest_path = profile_path / "manifest.json"
+    if not manifest_path.is_file():
+        return None
+    try:
+        return json.loads(manifest_path.read_text(encoding="utf-8"))
+    except (OSError, json.JSONDecodeError):
+        return None
+
+
+def _read_active_profile(profiles_root: Path) -> str | None:
+    """Return the active profile id from active.json, or None."""
+    active_path = profiles_root / "active.json"
+    if not active_path.is_file():
+        return None
+    try:
+        data = json.loads(active_path.read_text(encoding="utf-8"))
+        return data.get("active") or None
+    except (OSError, json.JSONDecodeError):
+        return None
+
+
+@prompt_profile_app.command("list")
+def prompt_profile_list(
+    project_path: Path = typer.Option(
+        Path("."),
+        "--project-path",
+        "-p",
+        help="Root of the target project (where .map/ lives).",
+        resolve_path=True,
+    ),
+    output_json: bool = typer.Option(False, "--json", help="Emit JSON instead of a table."),
+) -> None:
+    """List installed MAP prompt profiles in a project's .map/prompt-profiles/ directory."""
+    from rich.table import Table
+
+    profiles_root = _prompt_profiles_dir(project_path)
+    active_id = _read_active_profile(profiles_root)
+
+    profiles: list[dict[str, Any]] = []
+
+    if profiles_root.is_dir():
+        for entry in sorted(profiles_root.iterdir()):
+            if not entry.is_dir():
+                continue
+            manifest = _read_profile_manifest(entry)
+            if manifest is None:
+                continue
+            missing = [k for k in _PROFILE_MANIFEST_KEYS if k not in manifest]
+            if missing:
+                continue
+            profiles.append({
+                "id": manifest["id"],
+                "title": manifest["title"],
+                "version": manifest["version"],
+                "description": manifest.get("description", ""),
+                "targets": manifest.get("targets", []),
+                "active": manifest["id"] == active_id,
+            })
+
+    if output_json:
+        console.print_json(json.dumps({"profiles": profiles, "active": active_id}))
+        return
+
+    if not profiles:
+        console.print("No prompt profiles found in .map/prompt-profiles/.")
+        console.print(
+            "Create a profile at .map/prompt-profiles/<id>/manifest.json "
+            "with required keys: id, title, version."
+        )
+        return
+
+    table = Table(title="Prompt Profiles", box=None, show_header=True, header_style="bold")
+    table.add_column("ID", style="cyan")
+    table.add_column("Title")
+    table.add_column("Version")
+    table.add_column("Status")
+    table.add_column("Description")
+
+    for profile in profiles:
+        status = "active" if profile["active"] else "installed"
+        table.add_row(
+            profile["id"],
+            profile["title"],
+            profile["version"],
+            status,
+            profile["description"] or "",
+        )
+
+    console.print(table)
+
+    if active_id and not any(p["id"] == active_id for p in profiles):
+        console.print(
+            f"[yellow]Warning:[/yellow] active profile '{active_id}' not found in "
+            f".map/prompt-profiles/. The active.json pointer may be stale."
+        )
+
+
 # Research localization eval commands
 
 
diff --git a/tests/test_prompt_profile_commands.py b/tests/test_prompt_profile_commands.py
new file mode 100644
index 00000000..9007d15c
--- /dev/null
+++ b/tests/test_prompt_profile_commands.py
@@ -0,0 +1,246 @@
+"""Tests for mapify prompt-profile sub-commands (#353).
+
+Covers:
+  PP1 — empty project list behavior
+  PP2 — installed profiles appear in output
+  PP3 — missing/malformed manifest graceful degradation
+  PP4 — --json flag on list
+  PP5 — active profile marker from active.json
+  PP6 — stale active pointer warning
+"""
+
+from __future__ import annotations
+
+import json
+from pathlib import Path
+
+import pytest
+from typer.testing import CliRunner
+
+from mapify_cli import app
+
+runner = CliRunner()
+
+
+def _profiles_dir(tmp_path: Path) -> Path:
+    d = tmp_path / ".map" / "prompt-profiles"
+    d.mkdir(parents=True, exist_ok=True)
+    return d
+
+
+def _make_profile(profiles_root: Path, profile_id: str, manifest: dict) -> Path:
+    profile_dir = profiles_root / profile_id
+    profile_dir.mkdir(parents=True, exist_ok=True)
+    (profile_dir / "manifest.json").write_text(json.dumps(manifest), encoding="utf-8")
+    return profile_dir
+
+
+def _set_active(profiles_root: Path, profile_id: str | None) -> None:
+    (profiles_root / "active.json").write_text(
+        json.dumps({"active": profile_id}), encoding="utf-8"
+    )
+
+
+# ---------------------------------------------------------------------------
+# PP1 — empty project list behavior
+# ---------------------------------------------------------------------------
+
+
+class TestPp1EmptyList:
+    def test_no_profiles_dir_shows_message(self, tmp_path: Path):
+        result = runner.invoke(app, ["prompt-profile", "list", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        assert "No prompt profiles found" in result.output
+
+    def test_empty_profiles_dir_shows_message(self, tmp_path: Path):
+        _profiles_dir(tmp_path)
+        result = runner.invoke(app, ["prompt-profile", "list", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        assert "No prompt profiles found" in result.output
+
+    def test_empty_message_includes_creation_hint(self, tmp_path: Path):
+        result = runner.invoke(app, ["prompt-profile", "list", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        assert "manifest.json" in result.output
+
+
+# ---------------------------------------------------------------------------
+# PP2 — installed profiles appear in output
+# ---------------------------------------------------------------------------
+
+
+class TestPp2InstalledProfiles:
+    def test_single_profile_shows_id(self, tmp_path: Path):
+        root = _profiles_dir(tmp_path)
+        _make_profile(root, "efficiency-v2", {"id": "efficiency-v2", "title": "Efficiency v2", "version": "1.0.0"})
+        result = runner.invoke(app, ["prompt-profile", "list", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        assert "efficiency-v2" in result.output
+
+    def test_single_profile_shows_title(self, tmp_path: Path):
+        root = _profiles_dir(tmp_path)
+        _make_profile(root, "my-profile", {"id": "my-profile", "title": "My Profile Title", "version": "0.1.0"})
+        result = runner.invoke(app, ["prompt-profile", "list", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        assert "My Profile Title" in result.output
+
+    def test_multiple_profiles_shown(self, tmp_path: Path):
+        root = _profiles_dir(tmp_path)
+        _make_profile(root, "alpha", {"id": "alpha", "title": "Alpha", "version": "1.0.0"})
+        _make_profile(root, "beta", {"id": "beta", "title": "Beta", "version": "2.0.0"})
+        result = runner.invoke(app, ["prompt-profile", "list", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        assert "alpha" in result.output
+        assert "beta" in result.output
+
+    def test_optional_description_shown(self, tmp_path: Path):
+        root = _profiles_dir(tmp_path)
+        _make_profile(root, "p1", {
+            "id": "p1", "title": "Profile 1", "version": "1.0.0",
+            "description": "Improves actor token efficiency"
+        })
+        result = runner.invoke(app, ["prompt-profile", "list", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        assert "Improves actor token efficiency" in result.output
+
+
+# ---------------------------------------------------------------------------
+# PP3 — missing/malformed manifest graceful degradation
+# ---------------------------------------------------------------------------
+
+
+class TestPp3MalformedManifest:
+    def test_dir_without_manifest_json_skipped(self, tmp_path: Path):
+        root = _profiles_dir(tmp_path)
+        (root / "orphan-dir").mkdir()
+        result = runner.invoke(app, ["prompt-profile", "list", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        assert "orphan-dir" not in result.output
+
+    def test_invalid_json_manifest_skipped(self, tmp_path: Path):
+        root = _profiles_dir(tmp_path)
+        bad_dir = root / "broken"
+        bad_dir.mkdir()
+        (bad_dir / "manifest.json").write_text("{not valid json", encoding="utf-8")
+        result = runner.invoke(app, ["prompt-profile", "list", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        assert "broken" not in result.output
+
+    def test_manifest_missing_required_keys_skipped(self, tmp_path: Path):
+        root = _profiles_dir(tmp_path)
+        _make_profile(root, "incomplete", {"id": "incomplete", "title": "No version"})
+        result = runner.invoke(app, ["prompt-profile", "list", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        assert "incomplete" not in result.output
+
+    def test_valid_profile_still_shown_when_invalid_sibling(self, tmp_path: Path):
+        root = _profiles_dir(tmp_path)
+        _make_profile(root, "good", {"id": "good", "title": "Good", "version": "1.0.0"})
+        (root / "bad").mkdir()
+        (root / "bad" / "manifest.json").write_text("{bad}", encoding="utf-8")
+        result = runner.invoke(app, ["prompt-profile", "list", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        assert "good" in result.output
+
+
+# ---------------------------------------------------------------------------
+# PP4 — --json flag on list
+# ---------------------------------------------------------------------------
+
+
+class TestPp4JsonOutput:
+    def test_json_output_empty(self, tmp_path: Path):
+        result = runner.invoke(app, ["prompt-profile", "list", "--json", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        data = json.loads(result.output)
+        assert data["profiles"] == []
+        assert data["active"] is None
+
+    def test_json_output_contains_profiles(self, tmp_path: Path):
+        root = _profiles_dir(tmp_path)
+        _make_profile(root, "p1", {"id": "p1", "title": "P1", "version": "1.0.0"})
+        result = runner.invoke(app, ["prompt-profile", "list", "--json", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        data = json.loads(result.output)
+        assert len(data["profiles"]) == 1
+        assert data["profiles"][0]["id"] == "p1"
+
+    def test_json_required_fields_present(self, tmp_path: Path):
+        root = _profiles_dir(tmp_path)
+        _make_profile(root, "x", {"id": "x", "title": "X", "version": "2.0.0", "description": "test"})
+        result = runner.invoke(app, ["prompt-profile", "list", "--json", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        data = json.loads(result.output)
+        profile = data["profiles"][0]
+        for key in ("id", "title", "version", "description", "targets", "active"):
+            assert key in profile, f"missing key: {key}"
+
+    def test_json_active_field_null_when_no_active(self, tmp_path: Path):
+        root = _profiles_dir(tmp_path)
+        _make_profile(root, "x", {"id": "x", "title": "X", "version": "1.0.0"})
+        result = runner.invoke(app, ["prompt-profile", "list", "--json", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        data = json.loads(result.output)
+        assert data["active"] is None
+        assert data["profiles"][0]["active"] is False
+
+
+# ---------------------------------------------------------------------------
+# PP5 — active profile marker from active.json
+# ---------------------------------------------------------------------------
+
+
+class TestPp5ActiveProfile:
+    def test_active_profile_marked_in_table(self, tmp_path: Path):
+        root = _profiles_dir(tmp_path)
+        _make_profile(root, "p1", {"id": "p1", "title": "P1", "version": "1.0.0"})
+        _make_profile(root, "p2", {"id": "p2", "title": "P2", "version": "1.0.0"})
+        _set_active(root, "p1")
+        result = runner.invoke(app, ["prompt-profile", "list", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        assert "active" in result.output
+
+    def test_active_profile_json_flag(self, tmp_path: Path):
+        root = _profiles_dir(tmp_path)
+        _make_profile(root, "p1", {"id": "p1", "title": "P1", "version": "1.0.0"})
+        _set_active(root, "p1")
+        result = runner.invoke(app, ["prompt-profile", "list", "--json", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        data = json.loads(result.output)
+        assert data["active"] == "p1"
+        assert data["profiles"][0]["active"] is True
+
+    def test_inactive_profile_not_marked_active(self, tmp_path: Path):
+        root = _profiles_dir(tmp_path)
+        _make_profile(root, "p1", {"id": "p1", "title": "P1", "version": "1.0.0"})
+        _make_profile(root, "p2", {"id": "p2", "title": "P2", "version": "1.0.0"})
+        _set_active(root, "p1")
+        result = runner.invoke(app, ["prompt-profile", "list", "--json", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        data = json.loads(result.output)
+        profiles_by_id = {p["id"]: p for p in data["profiles"]}
+        assert profiles_by_id["p1"]["active"] is True
+        assert profiles_by_id["p2"]["active"] is False
+
+
+# ---------------------------------------------------------------------------
+# PP6 — stale active pointer warning
+# ---------------------------------------------------------------------------
+
+
+class TestPp6StaleActivePointer:
+    def test_stale_pointer_shows_warning(self, tmp_path: Path):
+        root = _profiles_dir(tmp_path)
+        _make_profile(root, "real", {"id": "real", "title": "Real", "version": "1.0.0"})
+        _set_active(root, "deleted-profile")
+        result = runner.invoke(app, ["prompt-profile", "list", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        assert "stale" in result.output.lower() or "Warning" in result.output
+
+    def test_stale_pointer_still_shows_real_profiles(self, tmp_path: Path):
+        root = _profiles_dir(tmp_path)
+        _make_profile(root, "real", {"id": "real", "title": "Real", "version": "1.0.0"})
+        _set_active(root, "ghost")
+        result = runner.invoke(app, ["prompt-profile", "list", "--project-path", str(tmp_path)])
+        assert result.exit_code == 0
+        assert "real" in result.output