diff --git a/tests/test_command_placeholder_targets.py b/tests/test_command_placeholder_targets.py
new file mode 100644
index 0000000000..225f9baa18
--- /dev/null
+++ b/tests/test_command_placeholder_targets.py
@@ -0,0 +1,142 @@
+"""Every ``__SPECKIT_COMMAND_<NAME>__`` placeholder names a command that exists.
+
+``IntegrationBase.resolve_command_refs`` rewrites the token with a regex and
+does not consult a list of commands, so a misspelled placeholder does not fail.
+``__SPECKIT_COMMAND_ASSES_SHAPE__`` becomes ``/speckit.asses.shape``, which is
+shipped into agent instructions as a plausible-looking command that no agent can
+run. Existing coverage in ``tests/test_agent_config_consistency.py`` and
+``tests/integrations/test_base.py`` asserts that the rewrite uses the right
+separator and prefix, which is the mechanism rather than the target.
+
+The command set is derived from the files that define commands rather than
+restated here, so a command added or renamed is covered without editing this
+module.
+"""
+
+import re
+from pathlib import Path
+
+import pytest
+import yaml
+
+REPO_ROOT = Path(__file__).resolve().parent.parent
+
+PLACEHOLDER = re.compile(r"__SPECKIT_COMMAND_([A-Z][A-Z0-9_]*)__")
+
+# Directories whose markdown is installed into a user's project.
+SHIPPED = ("templates", "extensions", "presets")
+
+
+def placeholder_to_command(name: str) -> str:
+    """The command ``resolve_command_refs`` produces for this placeholder."""
+    return "speckit." + name.lower().replace("_", ".")
+
+
+def core_commands() -> set[str]:
+    directory = REPO_ROOT / "templates" / "commands"
+    assert directory.is_dir(), f"expected core command templates at {directory}"
+    commands = {"speckit." + path.stem for path in directory.glob("*.md")}
+    assert commands, f"no core command templates found under {directory}"
+    return commands
+
+
+def manifest_commands() -> set[str]:
+    commands: set[str] = set()
+    manifests = list((REPO_ROOT / "extensions").glob("*/extension.yml"))
+    manifests += list((REPO_ROOT / "presets").glob("*/preset.yml"))
+    assert manifests, "no extension or preset manifests found"
+    for manifest in manifests:
+        data = yaml.safe_load(manifest.read_text(encoding="utf-8")) or {}
+        provides = data.get("provides") or {}
+        for entry in provides.get("commands") or []:
+            name = entry.get("name")
+            if name:
+                commands.add(name)
+            for alias in entry.get("aliases") or []:
+                commands.add(alias)
+    return commands
+
+
+def shipped_markdown() -> list[Path]:
+    paths: list[Path] = []
+    for directory in SHIPPED:
+        paths.extend(sorted((REPO_ROOT / directory).rglob("*.md")))
+    assert paths, "no shipped markdown found to scan"
+    return paths
+
+
+def placeholders_by_file() -> dict[Path, set[str]]:
+    found: dict[Path, set[str]] = {}
+    for path in shipped_markdown():
+        names = set(PLACEHOLDER.findall(path.read_text(encoding="utf-8")))
+        if names:
+            found[path] = names
+    return found
+
+
+def test_placeholders_are_present_to_be_checked():
+    """A scan that silently finds nothing would pass forever."""
+    assert placeholders_by_file(), (
+        "no __SPECKIT_COMMAND_*__ placeholders found in shipped markdown; the "
+        "token spelling or the shipped directories changed"
+    )
+
+
+def test_every_placeholder_names_a_command_that_exists():
+    known = core_commands() | manifest_commands()
+    unresolved: dict[str, list[str]] = {}
+    for path, names in placeholders_by_file().items():
+        for name in names:
+            command = placeholder_to_command(name)
+            if command not in known:
+                relative = path.relative_to(REPO_ROOT).as_posix()
+                unresolved.setdefault(command, []).append(relative)
+    assert not unresolved, (
+        "placeholders resolve to commands that do not exist: "
+        + "; ".join(
+            f"/{command} referenced by {', '.join(sorted(files))}"
+            for command, files in sorted(unresolved.items())
+        )
+    )
+
+
+def test_core_templates_do_not_reference_extension_commands():
+    """A core template must work when no extension is installed."""
+    core = core_commands()
+    extension_only = manifest_commands() - core
+    leaked: dict[str, list[str]] = {}
+    for path, names in placeholders_by_file().items():
+        if not path.is_relative_to(REPO_ROOT / "templates"):
+            continue
+        for name in names:
+            command = placeholder_to_command(name)
+            if command in extension_only:
+                relative = path.relative_to(REPO_ROOT).as_posix()
+                leaked.setdefault(command, []).append(relative)
+    assert not leaked, (
+        "core templates reference commands only an extension provides, so the "
+        "instruction is dead unless that extension is installed: "
+        + "; ".join(
+            f"/{command} in {', '.join(sorted(files))}"
+            for command, files in sorted(leaked.items())
+        )
+    )
+
+
+@pytest.mark.parametrize(
+    ("placeholder", "expected"),
+    [
+        ("PLAN", "speckit.plan"),
+        ("GIT_COMMIT", "speckit.git.commit"),
+        ("ASSESS_SHAPE", "speckit.assess.shape"),
+    ],
+)
+def test_placeholder_to_command_matches_resolve_command_refs(placeholder, expected):
+    """The mapping used here is the one the resolver implements."""
+    from specify_cli.integrations.base import IntegrationBase
+
+    resolved = IntegrationBase.resolve_command_refs(
+        f"__SPECKIT_COMMAND_{placeholder}__", separator=".", prefix="/"
+    )
+    assert resolved == f"/{expected}"
+    assert placeholder_to_command(placeholder) == expected