diff --git a/graphify/install.py b/graphify/install.py
index 0001daa4dd..18290e93d5 100644
--- a/graphify/install.py
+++ b/graphify/install.py
@@ -497,6 +497,14 @@ def _register_always_on_block(target: Path, prefix: str, registration: str) -> N
         "claude_md": False,
         "skill_refs": "pi",
     },
+    "omp": {
+        # OMP (Oh My Pi) mirrors pi's agent layout under ~/.omp, which the
+        # legacy ~/.pi path is no longer read from.
+        "skill_file": "skill-pi.md",
+        "skill_dst": Path(".omp") / "agent" / "skills" / "graphify" / "SKILL.md",
+        "claude_md": False,
+        "skill_refs": "pi",
+    },
     "codebuddy": {
         # Reuses claude's split bundle (shares skill.md).
         "skill_file": "skill.md",
@@ -1701,7 +1709,7 @@ def _project_install(platform_name: str, project_dir: Path | None = None, strict
         skill_dst = _copy_skill_file("antigravity", project=True, project_dir=project_dir)
         _antigravity_finalize(skill_dst, project_dir)
         _print_project_git_add_hint([_project_scope_root(skill_dst, project_dir), project_dir / ".agents"])
-    elif platform_name in ("copilot", "pi", "kimi", "agents"):
+    elif platform_name in ("copilot", "pi", "kimi", "agents", "omp"):
         # Skill-only project install: drop SKILL.md (+ references) at the scope
         # root. `agents` -> ./.agents/skills/graphify/SKILL.md.
         skill_dst = _copy_skill_file(platform_name, project=True, project_dir=project_dir)
@@ -1734,7 +1742,7 @@ def _project_uninstall(platform_name: str, project_dir: Path | None = None) -> N
         _devin_rules_uninstall(project_dir)
         if not removed:
             print("nothing to remove")
-    elif platform_name in ("copilot", "pi", "kimi", "agents"):
+    elif platform_name in ("copilot", "pi", "kimi", "agents", "omp"):
         removed = _remove_skill_file(platform_name, project=True, project_dir=project_dir)
         if not removed:
             print("nothing to remove")
@@ -2129,6 +2137,7 @@ def codebuddy_uninstall(project_dir: Path | None = None, *, project: bool = Fals
     "kilo",
     "kiro",
     "opencode",
+    "omp",
     "pi",
     "skills",
     "trae",
@@ -2351,6 +2360,21 @@ def dispatch_install_cli(cmd: str) -> bool:
         else:
             print("Usage: graphify pi [install|uninstall]", file=sys.stderr)
             sys.exit(1)
+    elif cmd == "omp":
+        subcmd = sys.argv[2] if len(sys.argv) > 2 else ""
+        if subcmd == "install":
+            if "--project" in sys.argv[3:]:
+                _project_install("omp", Path("."))
+            else:
+                install("omp")
+        elif subcmd == "uninstall":
+            if "--project" in sys.argv[3:]:
+                _project_uninstall("omp", Path("."))
+            else:
+                _remove_skill_file("omp")
+        else:
+            print("Usage: graphify omp [install|uninstall]", file=sys.stderr)
+            sys.exit(1)
     elif cmd == "amp":
         subcmd = sys.argv[2] if len(sys.argv) > 2 else ""
         if subcmd == "install":
diff --git a/tests/test_omp_platform.py b/tests/test_omp_platform.py
new file mode 100644
index 0000000000..b2a06b1af8
--- /dev/null
+++ b/tests/test_omp_platform.py
@@ -0,0 +1,158 @@
+"""Tests for the OMP (Oh My Pi) install platform.
+
+`graphify install --platform omp` installs the skill into OMP's agent
+directory — ``~/.omp/agent/skills`` globally, ``./.omp/agent/skills`` in
+project scope — reusing pi's skill bundle, because OMP mirrors pi's agent
+layout. The ``graphify omp`` subcommand mirrors the ``graphify pi`` twin.
+"""
+import os
+import sys
+from pathlib import Path
+from unittest.mock import patch
+
+import pytest
+
+import graphify.__main__ as mainmod
+
+
+# --- destination map -----------------------------------------------------------
+
+
+def test_omp_user_destination_is_omp_agent_skills(tmp_path):
+    """Global omp skill lands at ~/.omp/agent/skills — the active OMP agent
+    directory, NOT the legacy ~/.pi path OMP no longer reads."""
+    with patch("graphify.__main__.Path.home", return_value=tmp_path):
+        dst = mainmod._platform_skill_destination("omp", project=False)
+    assert dst == tmp_path / ".omp" / "agent" / "skills" / "graphify" / "SKILL.md"
+
+
+def test_omp_project_destination_is_omp_agent_skills(tmp_path):
+    """Project omp skill lands at ./.omp/agent/skills."""
+    dst = mainmod._platform_skill_destination("omp", project=True, project_dir=tmp_path)
+    assert dst == tmp_path / ".omp" / "agent" / "skills" / "graphify" / "SKILL.md"
+
+
+def test_omp_reuses_the_pi_bundle():
+    """omp installs pi's skill file and references sidecar verbatim: OMP is a
+    pi successor with the same skill format, so a second bundle would only
+    drift."""
+    cfg = mainmod._PLATFORM_CONFIG["omp"]
+    assert cfg["skill_file"] == mainmod._PLATFORM_CONFIG["pi"]["skill_file"]
+    assert cfg["skill_refs"] == "pi"
+    assert cfg["claude_md"] is False
+
+
+# --- end-to-end install / uninstall via the CLI --------------------------------
+
+
+def _run(tmp_path, argv, home):
+    """Drive main() with argv, cwd at tmp_path, and Path.home redirected."""
+    old_cwd = Path.cwd()
+    try:
+        os.chdir(tmp_path)
+        with patch.object(sys, "argv", ["graphify", *argv]):
+            with patch("graphify.__main__.Path.home", return_value=home):
+                mainmod.main()
+    finally:
+        os.chdir(old_cwd)
+
+
+def test_install_platform_omp_writes_user_skill(tmp_path):
+    """`graphify install --platform omp` writes ~/.omp/agent/skills/...
+    SKILL.md (+ pi's references) and nothing else — no CLAUDE.md (skill-only)."""
+    home = tmp_path / "home"
+    cwd = tmp_path / "cwd"
+    home.mkdir()
+    cwd.mkdir()
+
+    _run(cwd, ["install", "--platform", "omp"], home)
+
+    skill = home / ".omp" / "agent" / "skills" / "graphify" / "SKILL.md"
+    assert skill.exists()
+    assert (skill.parent / ".graphify_version").read_text() == mainmod.__version__
+    assert (skill.parent / "references" / "extraction-spec.md").exists()
+    # Skill-only: the --platform path must not write a CLAUDE.md.
+    assert not (cwd / "CLAUDE.md").exists()
+
+
+def test_uninstall_platform_flag_omp_matches_pi_parity(tmp_path):
+    """`graphify uninstall --platform omp` (global) is accepted.
+
+    uninstall_all removes user-scope skills for its listed platforms; pi —
+    omp's bundle twin — is not among them, so omp matches pi exactly: the
+    flag form is accepted and the user-scope skill is removed by the
+    `graphify omp uninstall` subcommand (locked in below), not by
+    uninstall_all. Locking the pi parity stops a future edit from silently
+    special-casing one twin.
+    """
+    home = tmp_path / "home"
+    cwd = tmp_path / "cwd"
+    home.mkdir()
+    cwd.mkdir()
+
+    _run(cwd, ["install", "--platform", "omp"], home)
+    skill = home / ".omp" / "agent" / "skills" / "graphify" / "SKILL.md"
+    assert skill.exists()
+
+    _run(cwd, ["uninstall", "--platform", "omp"], home)
+    # Same state pi leaves after its global uninstall: skill intact.
+    assert skill.exists()
+
+    _run(cwd, ["omp", "uninstall"], home)
+    assert not skill.exists()
+
+
+def test_install_platform_omp_project_writes_omp_agent_skills(tmp_path):
+    """`graphify install --project --platform omp` writes ./.omp/agent/skills and
+    leaves user scope untouched."""
+    home = tmp_path / "home"
+    proj = tmp_path / "proj"
+    home.mkdir()
+    proj.mkdir()
+
+    _run(proj, ["install", "--project", "--platform", "omp"], home)
+
+    project_skill = proj / ".omp" / "agent" / "skills" / "graphify" / "SKILL.md"
+    assert project_skill.exists()
+    assert (project_skill.parent / "references" / "extraction-spec.md").exists()
+    # User scope was not touched.
+    assert not (home / ".omp" / "agent").exists()
+
+    _run(proj, ["uninstall", "--project", "--platform", "omp"], home)
+    assert not project_skill.exists()
+
+
+# --- the pi-twin subcommand (graphify omp install) ------------------------------
+
+
+def test_omp_subcommand_installs_same_skill(tmp_path):
+    """`graphify omp install` installs the identical user-global skill as
+    `--platform omp` — same destination, same version stamp."""
+    home = tmp_path / "home"
+    cwd = tmp_path / "cwd"
+    home.mkdir()
+    cwd.mkdir()
+
+    _run(cwd, ["omp", "install"], home)
+
+    skill = home / ".omp" / "agent" / "skills" / "graphify" / "SKILL.md"
+    assert skill.exists()
+    assert (skill.parent / ".graphify_version").read_text() == mainmod.__version__
+
+    _run(cwd, ["omp", "uninstall"], home)
+    assert not skill.exists()
+
+
+def test_unknown_platform_error_lists_omp(capsys, tmp_path):
+    """The unknown-platform error is built from _PLATFORM_CONFIG, so the new
+    platform must appear in its choices — a guard against a config entry the
+    CLI error path cannot see."""
+    home = tmp_path / "home"
+    cwd = tmp_path / "cwd"
+    home.mkdir()
+    cwd.mkdir()
+
+    with pytest.raises(SystemExit):
+        _run(cwd, ["install", "--platform", "not-a-platform"], home)
+
+    assert "omp" in capsys.readouterr().err