diff --git a/eidos_cli/cli/forges.py b/eidos_cli/cli/forges.py
index 2cb1b97..1c9c56b 100644
--- a/eidos_cli/cli/forges.py
+++ b/eidos_cli/cli/forges.py
@@ -27,6 +27,9 @@ def register(app: typer.Typer) -> None:
     try:
         from telos_md.cli import app as telos_app  # type: ignore
 
+        from . import telos_trilogy_pointer
+
+        telos_trilogy_pointer.patch(telos_app)
         app.add_typer(
             telos_app,
             name="telos",
diff --git a/eidos_cli/cli/telos_trilogy_pointer.py b/eidos_cli/cli/telos_trilogy_pointer.py
new file mode 100644
index 0000000..a50d2ed
--- /dev/null
+++ b/eidos_cli/cli/telos_trilogy_pointer.py
@@ -0,0 +1,104 @@
+"""Overrides telos-md's ``set-north-star`` to stamp a trilogy pointer.
+
+telos-md itself deliberately holds zero sibling knowledge — see
+telos.md's own ``.converge/telos-holds-zero-sibling-knowledge-eidos-owns-the-ecosystem-map.md``,
+a tested decision that cross-forge knowledge belongs to eidos, not
+duplicated into every forge (a rename should touch one repo, not five).
+
+This module is where that knowledge lives instead. It wraps telos-md's
+``set-north-star`` so every file it writes carries a pointer back to the
+trilogy (research.md -> governor.md -> docket.md) and to telos.md's own
+docs — without telos-md itself ever knowing those tools exist.
+"""
+
+from __future__ import annotations
+
+from pathlib import Path
+from typing import Annotated, Optional
+
+import typer
+
+TRILOGY_REMINDER = (
+    "# telos is the drift-guard for a three-tool decision loop, not a\n"
+    "# standalone planning system:\n"
+    "#   research.md (decide with evidence)\n"
+    "#     -> governor.md (record the decision as an ADR/guardrail)\n"
+    "#       -> docket.md (execute it as tasks)\n"
+    "# Before acting on anything in this file, check governor's vision/ADRs/\n"
+    "# guardrails and docket's task list -- this file is not the source of\n"
+    "# truth for what to do, only for whether the loop is drifting.\n"
+    "#\n"
+    "# Docs: https://github.com/eidos-agi/research.md\n"
+    "#       https://github.com/eidos-agi/governor.md\n"
+    "#       https://github.com/eidos-agi/docket.md\n"
+    "#       https://github.com/eidos-agi/telos.md  (this tool)\n"
+    "# Use the unified `eidos` CLI (eidos research/governor/docket/telos ...)\n"
+    "# rather than calling these tools directly.\n"
+)
+
+_MARKER = "# telos is the drift-guard"
+
+
+def _prepend_reminder_once(path: Path) -> None:
+    if not path.is_file():
+        return
+    text = path.read_text()
+    if text.startswith(_MARKER):
+        return
+    path.write_text(TRILOGY_REMINDER + text)
+
+
+def _stamp_repo(repo_path: str) -> None:
+    telos_dir = Path(repo_path) / ".telos"
+    _prepend_reminder_once(telos_dir / "config.yaml")
+    ns_dir = telos_dir / "north_stars"
+    if ns_dir.is_dir():
+        for f in ns_dir.glob("*.yaml"):
+            _prepend_reminder_once(f)
+
+
+def patch(telos_app: typer.Typer) -> None:
+    """Replace ``telos_app``'s set-north-star command in place with a
+    wrapped version that stamps every file it touches."""
+    from telos_md._logic import _session as _sess
+    from telos_md._logic import loop as _loop
+    from telos_md.cli._app import emit
+
+    @telos_app.command("set-north-star")
+    def cmd_set_north_star(
+        goal: Annotated[
+            str, typer.Option(help="What this loop is trying to accomplish.")
+        ],
+        metric: Annotated[
+            Optional[str], typer.Option(help="How success is measured. Free text.")
+        ] = None,
+        stop_max_iters: Annotated[
+            Optional[int], typer.Option(help="Hard cap on iterations.")
+        ] = None,
+        stop_zero_delta_n: Annotated[
+            int, typer.Option(help="Stop after N consecutive zero-delta ticks.")
+        ] = 3,
+        signature: Annotated[
+            Optional[str], typer.Option(help="Optional hash of the work type.")
+        ] = None,
+        repo_path: Annotated[
+            Optional[str],
+            typer.Option(help="Absolute path to the repo this loop operates on."),
+        ] = None,
+        json_: Annotated[
+            bool, typer.Option("--json", "-J", help="JSON output.")
+        ] = False,
+    ) -> None:
+        """Register a north star -- a custody act. Returns the north_star_id."""
+        resolved = _sess.resolve(repo_path)
+        result = _loop.set_north_star(
+            goal=goal,
+            metric=metric,
+            stop_max_iters=stop_max_iters,
+            stop_zero_delta_n=stop_zero_delta_n,
+            signature=signature,
+            repo_path=resolved,
+        )
+        if resolved:
+            _stamp_repo(resolved)
+        emit(result, json_mode=json_)