hermes-agent/tests/tools/test_skill_manager_tool.py
Teknium c61b2e0af7
feat(skills): refuse skill_manage writes on pinned skills (#17562)
Extend curator's pin flag from 'skip auto-transitions' to 'no agent
edits at all'. All five skill_manage mutation actions (edit, patch,
delete, write_file, remove_file) now refuse pinned skills with a
message pointing the user at `hermes curator unpin <name>`.

Motivation: pin used to only stop the curator's own maintenance pass
from touching a skill. Nothing prevented the main agent from editing
or deleting a pinned skill via skill_manage in-session. This gives
users a hard fence against unwanted agent edits — same semantics as
curator pinning, extended to the write tool.

Create is unaffected (you can't pin a name that doesn't exist yet,
and name collisions already error out). Broken sidecars fail open
rather than lock the agent out.

The schema description advertises the new refusal so models know
not to route around it with rename/recreate tricks.
2026-04-29 10:28:25 -07:00

827 lines
32 KiB
Python

"""Tests for tools/skill_manager_tool.py — skill creation, editing, and deletion."""
import json
from contextlib import contextmanager
from pathlib import Path
from unittest.mock import patch
import pytest
from tools.skill_manager_tool import (
_validate_name,
_validate_category,
_validate_frontmatter,
_validate_file_path,
_find_skill,
_resolve_skill_dir,
_create_skill,
_edit_skill,
_patch_skill,
_delete_skill,
_write_file,
_remove_file,
skill_manage,
VALID_NAME_RE,
ALLOWED_SUBDIRS,
MAX_NAME_LENGTH,
)
@contextmanager
def _skill_dir(tmp_path):
"""Patch both SKILLS_DIR and get_all_skills_dirs so _find_skill searches
only the temp directory — not the real ~/.hermes/skills/."""
with patch("tools.skill_manager_tool.SKILLS_DIR", tmp_path), \
patch("agent.skill_utils.get_all_skills_dirs", return_value=[tmp_path]):
yield
VALID_SKILL_CONTENT = """\
---
name: test-skill
description: A test skill for unit testing.
---
# Test Skill
Step 1: Do the thing.
"""
VALID_SKILL_CONTENT_2 = """\
---
name: test-skill
description: Updated description.
---
# Test Skill v2
Step 1: Do the new thing.
"""
# ---------------------------------------------------------------------------
# _validate_name
# ---------------------------------------------------------------------------
class TestValidateName:
def test_valid_names(self):
assert _validate_name("my-skill") is None
assert _validate_name("skill123") is None
assert _validate_name("my_skill.v2") is None
assert _validate_name("a") is None
def test_empty_name(self):
assert _validate_name("") == "Skill name is required."
def test_too_long(self):
err = _validate_name("a" * (MAX_NAME_LENGTH + 1))
assert err == f"Skill name exceeds {MAX_NAME_LENGTH} characters."
def test_uppercase_rejected(self):
err = _validate_name("MySkill")
assert "Invalid skill name 'MySkill'" in err
def test_starts_with_hyphen_rejected(self):
err = _validate_name("-invalid")
assert "Invalid skill name '-invalid'" in err
def test_special_chars_rejected(self):
err = _validate_name("skill/name")
assert "Invalid skill name 'skill/name'" in err
err = _validate_name("skill name")
assert "Invalid skill name 'skill name'" in err
err = _validate_name("skill@name")
assert "Invalid skill name 'skill@name'" in err
class TestValidateCategory:
def test_valid_categories(self):
assert _validate_category(None) is None
assert _validate_category("") is None
assert _validate_category("devops") is None
assert _validate_category("mlops-v2") is None
def test_path_traversal_rejected(self):
err = _validate_category("../escape")
assert "Invalid category '../escape'" in err
def test_absolute_path_rejected(self):
err = _validate_category("/tmp/escape")
assert "Invalid category '/tmp/escape'" in err
# ---------------------------------------------------------------------------
# _validate_frontmatter
# ---------------------------------------------------------------------------
class TestValidateFrontmatter:
def test_valid_content(self):
assert _validate_frontmatter(VALID_SKILL_CONTENT) is None
def test_empty_content(self):
assert _validate_frontmatter("") == "Content cannot be empty."
assert _validate_frontmatter(" ") == "Content cannot be empty."
def test_no_frontmatter(self):
err = _validate_frontmatter("# Just a heading\nSome content.\n")
assert err == "SKILL.md must start with YAML frontmatter (---). See existing skills for format."
def test_unclosed_frontmatter(self):
content = "---\nname: test\ndescription: desc\nBody content.\n"
assert _validate_frontmatter(content) == "SKILL.md frontmatter is not closed. Ensure you have a closing '---' line."
def test_missing_name_field(self):
content = "---\ndescription: desc\n---\n\nBody.\n"
assert _validate_frontmatter(content) == "Frontmatter must include 'name' field."
def test_missing_description_field(self):
content = "---\nname: test\n---\n\nBody.\n"
assert _validate_frontmatter(content) == "Frontmatter must include 'description' field."
def test_no_body_after_frontmatter(self):
content = "---\nname: test\ndescription: desc\n---\n"
assert _validate_frontmatter(content) == "SKILL.md must have content after the frontmatter (instructions, procedures, etc.)."
def test_invalid_yaml(self):
content = "---\n: invalid: yaml: {{{\n---\n\nBody.\n"
assert "YAML frontmatter parse error" in _validate_frontmatter(content)
# ---------------------------------------------------------------------------
# _validate_file_path — path traversal prevention
# ---------------------------------------------------------------------------
class TestValidateFilePath:
def test_valid_paths(self):
assert _validate_file_path("references/api.md") is None
assert _validate_file_path("templates/config.yaml") is None
assert _validate_file_path("scripts/train.py") is None
assert _validate_file_path("assets/image.png") is None
def test_empty_path(self):
assert _validate_file_path("") == "file_path is required."
def test_path_traversal_blocked(self):
err = _validate_file_path("references/../../../etc/passwd")
assert err == "Path traversal ('..') is not allowed."
def test_disallowed_subdirectory(self):
err = _validate_file_path("secret/hidden.txt")
assert "File must be under one of:" in err
assert "'secret/hidden.txt'" in err
def test_directory_only_rejected(self):
err = _validate_file_path("references")
assert "Provide a file path, not just a directory" in err
assert "'references/myfile.md'" in err
def test_root_level_file_rejected(self):
err = _validate_file_path("malicious.py")
assert "File must be under one of:" in err
assert "'malicious.py'" in err
# ---------------------------------------------------------------------------
# CRUD operations
# ---------------------------------------------------------------------------
class TestCreateSkill:
def test_create_skill(self, tmp_path):
with _skill_dir(tmp_path):
result = _create_skill("my-skill", VALID_SKILL_CONTENT)
assert result["success"] is True
assert (tmp_path / "my-skill" / "SKILL.md").exists()
def test_create_with_category(self, tmp_path):
with _skill_dir(tmp_path):
result = _create_skill("my-skill", VALID_SKILL_CONTENT, category="devops")
assert result["success"] is True
assert (tmp_path / "devops" / "my-skill" / "SKILL.md").exists()
assert result["category"] == "devops"
def test_create_duplicate_blocked(self, tmp_path):
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
result = _create_skill("my-skill", VALID_SKILL_CONTENT)
assert result["success"] is False
assert "already exists" in result["error"]
def test_create_invalid_name(self, tmp_path):
with _skill_dir(tmp_path):
result = _create_skill("Invalid Name!", VALID_SKILL_CONTENT)
assert result["success"] is False
def test_create_invalid_content(self, tmp_path):
with _skill_dir(tmp_path):
result = _create_skill("my-skill", "no frontmatter here")
assert result["success"] is False
def test_create_rejects_category_traversal(self, tmp_path):
skills_dir = tmp_path / "skills"
skills_dir.mkdir()
with patch("tools.skill_manager_tool.SKILLS_DIR", skills_dir), \
patch("agent.skill_utils.get_all_skills_dirs", return_value=[skills_dir]):
result = _create_skill("my-skill", VALID_SKILL_CONTENT, category="../escape")
assert result["success"] is False
assert "Invalid category '../escape'" in result["error"]
assert not (tmp_path / "escape").exists()
def test_create_rejects_absolute_category(self, tmp_path):
skills_dir = tmp_path / "skills"
skills_dir.mkdir()
outside = tmp_path / "outside"
with patch("tools.skill_manager_tool.SKILLS_DIR", skills_dir), \
patch("agent.skill_utils.get_all_skills_dirs", return_value=[skills_dir]):
result = _create_skill("my-skill", VALID_SKILL_CONTENT, category=str(outside))
assert result["success"] is False
assert f"Invalid category '{outside}'" in result["error"]
assert not (outside / "my-skill" / "SKILL.md").exists()
class TestEditSkill:
def test_edit_existing_skill(self, tmp_path):
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
result = _edit_skill("my-skill", VALID_SKILL_CONTENT_2)
assert result["success"] is True
content = (tmp_path / "my-skill" / "SKILL.md").read_text()
assert "Updated description" in content
def test_edit_nonexistent_skill(self, tmp_path):
with _skill_dir(tmp_path):
result = _edit_skill("nonexistent", VALID_SKILL_CONTENT)
assert result["success"] is False
assert "not found" in result["error"]
def test_edit_invalid_content_rejected(self, tmp_path):
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
result = _edit_skill("my-skill", "no frontmatter")
assert result["success"] is False
# Original content should be preserved
content = (tmp_path / "my-skill" / "SKILL.md").read_text()
assert "A test skill" in content
class TestPatchSkill:
def test_patch_unique_match(self, tmp_path):
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
result = _patch_skill("my-skill", "Do the thing.", "Do the new thing.")
assert result["success"] is True
content = (tmp_path / "my-skill" / "SKILL.md").read_text()
assert "Do the new thing." in content
def test_patch_nonexistent_string(self, tmp_path):
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
result = _patch_skill("my-skill", "this text does not exist", "replacement")
assert result["success"] is False
assert "not found" in result["error"].lower() or "could not find" in result["error"].lower()
def test_patch_ambiguous_match_rejected(self, tmp_path):
content = """\
---
name: test-skill
description: A test skill.
---
# Test
word word
"""
with _skill_dir(tmp_path):
_create_skill("my-skill", content)
result = _patch_skill("my-skill", "word", "replaced")
assert result["success"] is False
assert "match" in result["error"].lower()
def test_patch_replace_all(self, tmp_path):
content = """\
---
name: test-skill
description: A test skill.
---
# Test
word word
"""
with _skill_dir(tmp_path):
_create_skill("my-skill", content)
result = _patch_skill("my-skill", "word", "replaced", replace_all=True)
assert result["success"] is True
def test_patch_supporting_file(self, tmp_path):
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
_write_file("my-skill", "references/api.md", "old text here")
result = _patch_skill("my-skill", "old text", "new text", file_path="references/api.md")
assert result["success"] is True
def test_patch_skill_not_found(self, tmp_path):
with _skill_dir(tmp_path):
result = _patch_skill("nonexistent", "old", "new")
assert result["success"] is False
def test_patch_supporting_file_symlink_escape_blocked(self, tmp_path):
outside_file = tmp_path / "outside.txt"
outside_file.write_text("old text here")
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
link = tmp_path / "my-skill" / "references" / "evil.md"
link.parent.mkdir(parents=True, exist_ok=True)
try:
link.symlink_to(outside_file)
except OSError:
pytest.skip("Symlinks not supported")
result = _patch_skill("my-skill", "old text", "new text", file_path="references/evil.md")
assert result["success"] is False
assert "escapes" in result["error"].lower()
assert outside_file.read_text() == "old text here"
class TestDeleteSkill:
def test_delete_existing(self, tmp_path):
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
result = _delete_skill("my-skill")
assert result["success"] is True
assert not (tmp_path / "my-skill").exists()
def test_delete_nonexistent(self, tmp_path):
with _skill_dir(tmp_path):
result = _delete_skill("nonexistent")
assert result["success"] is False
def test_delete_cleans_empty_category_dir(self, tmp_path):
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT, category="devops")
_delete_skill("my-skill")
assert not (tmp_path / "devops").exists()
# ---------------------------------------------------------------------------
# write_file / remove_file
# ---------------------------------------------------------------------------
class TestWriteFile:
def test_write_reference_file(self, tmp_path):
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
result = _write_file("my-skill", "references/api.md", "# API\nEndpoint docs.")
assert result["success"] is True
assert (tmp_path / "my-skill" / "references" / "api.md").exists()
def test_write_to_nonexistent_skill(self, tmp_path):
with _skill_dir(tmp_path):
result = _write_file("nonexistent", "references/doc.md", "content")
assert result["success"] is False
def test_write_to_disallowed_path(self, tmp_path):
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
result = _write_file("my-skill", "secret/evil.py", "malicious")
assert result["success"] is False
def test_write_symlink_escape_blocked(self, tmp_path):
outside_dir = tmp_path / "outside"
outside_dir.mkdir()
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
link = tmp_path / "my-skill" / "references" / "escape"
link.parent.mkdir(parents=True, exist_ok=True)
try:
link.symlink_to(outside_dir, target_is_directory=True)
except OSError:
pytest.skip("Symlinks not supported")
result = _write_file("my-skill", "references/escape/owned.md", "malicious")
assert result["success"] is False
assert "escapes" in result["error"].lower()
assert not (outside_dir / "owned.md").exists()
class TestRemoveFile:
def test_remove_existing_file(self, tmp_path):
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
_write_file("my-skill", "references/api.md", "content")
result = _remove_file("my-skill", "references/api.md")
assert result["success"] is True
assert not (tmp_path / "my-skill" / "references" / "api.md").exists()
def test_remove_nonexistent_file(self, tmp_path):
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
result = _remove_file("my-skill", "references/nope.md")
assert result["success"] is False
def test_remove_symlink_escape_blocked(self, tmp_path):
outside_dir = tmp_path / "outside"
outside_dir.mkdir()
outside_file = outside_dir / "keep.txt"
outside_file.write_text("content")
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
link = tmp_path / "my-skill" / "references" / "escape"
link.parent.mkdir(parents=True, exist_ok=True)
try:
link.symlink_to(outside_dir, target_is_directory=True)
except OSError:
pytest.skip("Symlinks not supported")
result = _remove_file("my-skill", "references/escape/keep.txt")
assert result["success"] is False
assert "escapes" in result["error"].lower()
assert outside_file.exists()
# ---------------------------------------------------------------------------
# skill_manage dispatcher
# ---------------------------------------------------------------------------
class TestSkillManageDispatcher:
def test_unknown_action(self, tmp_path):
with _skill_dir(tmp_path):
raw = skill_manage(action="explode", name="test")
result = json.loads(raw)
assert result["success"] is False
assert "Unknown action" in result["error"]
def test_create_without_content(self, tmp_path):
with _skill_dir(tmp_path):
raw = skill_manage(action="create", name="test")
result = json.loads(raw)
assert result["success"] is False
assert "content" in result["error"].lower()
def test_patch_without_old_string(self, tmp_path):
with _skill_dir(tmp_path):
raw = skill_manage(action="patch", name="test")
result = json.loads(raw)
assert result["success"] is False
def test_full_create_via_dispatcher(self, tmp_path):
with _skill_dir(tmp_path):
raw = skill_manage(action="create", name="test-skill", content=VALID_SKILL_CONTENT)
result = json.loads(raw)
assert result["success"] is True
class TestSecurityScanGate:
"""_security_scan_skill is gated by skills.guard_agent_created config flag."""
def test_scan_noop_when_flag_off(self, tmp_path):
"""Default config (flag off) short-circuits before running scan_skill."""
from tools.skill_manager_tool import _security_scan_skill
with patch("tools.skill_manager_tool._guard_agent_created_enabled", return_value=False), \
patch("tools.skill_manager_tool.scan_skill") as mock_scan:
result = _security_scan_skill(tmp_path)
assert result is None
mock_scan.assert_not_called() # scan never ran
def test_scan_runs_when_flag_on(self, tmp_path):
"""When flag is on, scan_skill is invoked and its verdict is honored."""
from tools.skill_manager_tool import _security_scan_skill
from tools.skills_guard import ScanResult
# Fake a safe scan result — caller should return None (allow)
fake_result = ScanResult(
skill_name="test",
source="agent-created",
trust_level="agent-created",
verdict="safe",
findings=[],
summary="ok",
)
with patch("tools.skill_manager_tool._guard_agent_created_enabled", return_value=True), \
patch("tools.skill_manager_tool.scan_skill", return_value=fake_result) as mock_scan:
result = _security_scan_skill(tmp_path)
assert result is None
mock_scan.assert_called_once()
def test_scan_blocks_dangerous_when_flag_on(self, tmp_path):
"""Dangerous verdict + flag on → returns an error string for the agent."""
from tools.skill_manager_tool import _security_scan_skill
from tools.skills_guard import ScanResult, Finding
finding = Finding(
pattern_id="test", severity="critical", category="exfiltration",
file="SKILL.md", line=1, match="curl $TOKEN", description="test",
)
fake_result = ScanResult(
skill_name="test",
source="agent-created",
trust_level="agent-created",
verdict="dangerous",
findings=[finding],
summary="dangerous",
)
with patch("tools.skill_manager_tool._guard_agent_created_enabled", return_value=True), \
patch("tools.skill_manager_tool.scan_skill", return_value=fake_result):
result = _security_scan_skill(tmp_path)
assert result is not None
assert "Security scan blocked" in result
def test_guard_flag_reads_config_default_false(self):
"""_guard_agent_created_enabled returns False when config doesn't set it."""
from tools.skill_manager_tool import _guard_agent_created_enabled
with patch("hermes_cli.config.load_config", return_value={"skills": {}}):
assert _guard_agent_created_enabled() is False
def test_guard_flag_reads_config_when_set(self):
"""_guard_agent_created_enabled returns True when user explicitly enables."""
from tools.skill_manager_tool import _guard_agent_created_enabled
with patch("hermes_cli.config.load_config",
return_value={"skills": {"guard_agent_created": True}}):
assert _guard_agent_created_enabled() is True
def test_guard_flag_handles_config_error(self):
"""If load_config raises, _guard_agent_created_enabled defaults to False (fail-safe off)."""
from tools.skill_manager_tool import _guard_agent_created_enabled
with patch("hermes_cli.config.load_config", side_effect=RuntimeError("boom")):
assert _guard_agent_created_enabled() is False
# ---------------------------------------------------------------------------
# External skills directories (skills.external_dirs) — mutations in place
# ---------------------------------------------------------------------------
@contextmanager
def _two_roots(local_dir: Path, external_dir: Path):
"""Patch the skill manager so local SKILLS_DIR = local_dir and
get_all_skills_dirs() returns [local_dir, external_dir] in order."""
with patch("tools.skill_manager_tool.SKILLS_DIR", local_dir), \
patch("agent.skill_utils.get_all_skills_dirs",
return_value=[local_dir, external_dir]):
yield
def _write_external_skill(external_dir: Path, name: str = "ext-skill") -> Path:
skill_dir = external_dir / name
skill_dir.mkdir(parents=True)
(skill_dir / "SKILL.md").write_text(
f"---\nname: {name}\ndescription: An external skill.\n---\n\n"
"# External\n\nBody with OLD_MARKER here.\n"
)
return skill_dir
class TestExternalSkillMutations:
"""Verify skill_manage can patch/edit/write/remove/delete skills that live
under skills.external_dirs — in place, without duplicating to local.
Regression for issues #4759 and #4381: the read-only gate used to refuse
with 'Skill X is in an external directory and cannot be modified', which
caused agents to create duplicate copies in ~/.hermes/skills/ as a
workaround.
"""
def test_patch_external_skill_writes_in_place(self, tmp_path):
local = tmp_path / "local"
external = tmp_path / "vault"
local.mkdir(); external.mkdir()
skill_dir = _write_external_skill(external)
with _two_roots(local, external):
result = _patch_skill("ext-skill", "OLD_MARKER", "NEW_MARKER")
assert result["success"] is True, result
assert "NEW_MARKER" in (skill_dir / "SKILL.md").read_text()
# No duplicate in local
assert not (local / "ext-skill").exists()
def test_edit_external_skill_writes_in_place(self, tmp_path):
local = tmp_path / "local"
external = tmp_path / "vault"
local.mkdir(); external.mkdir()
skill_dir = _write_external_skill(external)
new_content = (
"---\nname: ext-skill\ndescription: Rewritten.\n---\n\n"
"# Rewritten\n\nBrand new body.\n"
)
with _two_roots(local, external):
result = _edit_skill("ext-skill", new_content)
assert result["success"] is True, result
assert "Brand new body" in (skill_dir / "SKILL.md").read_text()
assert not (local / "ext-skill").exists()
def test_write_file_on_external_skill(self, tmp_path):
local = tmp_path / "local"
external = tmp_path / "vault"
local.mkdir(); external.mkdir()
skill_dir = _write_external_skill(external)
with _two_roots(local, external):
result = _write_file("ext-skill", "references/notes.md", "# Notes\n")
assert result["success"] is True, result
assert (skill_dir / "references" / "notes.md").read_text() == "# Notes\n"
assert not (local / "ext-skill").exists()
def test_remove_file_on_external_skill(self, tmp_path):
local = tmp_path / "local"
external = tmp_path / "vault"
local.mkdir(); external.mkdir()
skill_dir = _write_external_skill(external)
(skill_dir / "references").mkdir()
(skill_dir / "references" / "notes.md").write_text("# Notes\n")
with _two_roots(local, external):
result = _remove_file("ext-skill", "references/notes.md")
assert result["success"] is True, result
assert not (skill_dir / "references" / "notes.md").exists()
def test_delete_external_skill_removes_skill_not_root(self, tmp_path):
local = tmp_path / "local"
external = tmp_path / "vault"
local.mkdir(); external.mkdir()
skill_dir = _write_external_skill(external)
with _two_roots(local, external):
result = _delete_skill("ext-skill")
assert result["success"] is True, result
assert not skill_dir.exists()
# The external root must NOT be rmdir'd, even when empty after deletion
assert external.exists() and external.is_dir()
def test_delete_external_skill_cleans_empty_category(self, tmp_path):
"""When a skill lives under external/<category>/<name>, deleting the
last skill in the category should rmdir the empty category dir but
stop at the external root."""
local = tmp_path / "local"
external = tmp_path / "vault"
local.mkdir(); external.mkdir()
cat_dir = external / "team"
cat_dir.mkdir()
skill_dir = cat_dir / "ext-skill"
skill_dir.mkdir()
(skill_dir / "SKILL.md").write_text(
"---\nname: ext-skill\ndescription: An external skill.\n---\n\n"
"# External\n\nBody.\n"
)
with _two_roots(local, external):
result = _delete_skill("ext-skill")
assert result["success"] is True, result
assert not skill_dir.exists()
assert not cat_dir.exists() # empty category cleaned up
assert external.exists() # but never the external root
def test_create_still_writes_to_local_root(self, tmp_path):
"""Creating a new skill always lands in local SKILLS_DIR, never
external_dirs — create is unchanged by this PR."""
local = tmp_path / "local"
external = tmp_path / "vault"
local.mkdir(); external.mkdir()
with _two_roots(local, external):
result = _create_skill("fresh-skill", VALID_SKILL_CONTENT.replace(
"name: test-skill", "name: fresh-skill"))
assert result["success"] is True, result
assert (local / "fresh-skill" / "SKILL.md").exists()
assert not (external / "fresh-skill").exists()
# ---------------------------------------------------------------------------
# Pinned-skill guard — skill_manage refuses all writes to pinned skills.
# The user unpins via `hermes curator unpin <name>`.
# ---------------------------------------------------------------------------
class TestPinnedGuard:
"""Every mutation action must refuse when the skill is pinned."""
@staticmethod
def _pin(name: str):
"""Return a patch context that marks *name* as pinned in skill_usage."""
def _fake_get_record(skill_name, _name=name):
return {"pinned": True} if skill_name == _name else {"pinned": False}
return patch("tools.skill_usage.get_record", side_effect=_fake_get_record)
def test_edit_refuses_pinned(self, tmp_path):
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
with self._pin("my-skill"):
result = _edit_skill("my-skill", VALID_SKILL_CONTENT_2)
assert result["success"] is False
assert "pinned" in result["error"].lower()
assert "hermes curator unpin my-skill" in result["error"]
# Original content preserved
content = (tmp_path / "my-skill" / "SKILL.md").read_text()
assert "A test skill" in content
def test_patch_refuses_pinned(self, tmp_path):
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
with self._pin("my-skill"):
result = _patch_skill("my-skill", "Do the thing.", "Do the new thing.")
assert result["success"] is False
assert "pinned" in result["error"].lower()
assert "hermes curator unpin my-skill" in result["error"]
content = (tmp_path / "my-skill" / "SKILL.md").read_text()
assert "Do the thing." in content # unchanged
def test_patch_supporting_file_refuses_pinned(self, tmp_path):
"""Pin covers supporting files too, not just SKILL.md."""
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
_write_file("my-skill", "references/api.md", "original")
with self._pin("my-skill"):
result = _patch_skill(
"my-skill", "original", "modified",
file_path="references/api.md",
)
assert result["success"] is False
assert "pinned" in result["error"].lower()
assert (tmp_path / "my-skill" / "references" / "api.md").read_text() == "original"
def test_delete_refuses_pinned(self, tmp_path):
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
with self._pin("my-skill"):
result = _delete_skill("my-skill")
assert result["success"] is False
assert "pinned" in result["error"].lower()
# Skill still exists
assert (tmp_path / "my-skill" / "SKILL.md").exists()
def test_write_file_refuses_pinned(self, tmp_path):
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
with self._pin("my-skill"):
result = _write_file("my-skill", "references/api.md", "content")
assert result["success"] is False
assert "pinned" in result["error"].lower()
assert not (tmp_path / "my-skill" / "references" / "api.md").exists()
def test_remove_file_refuses_pinned(self, tmp_path):
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
_write_file("my-skill", "references/api.md", "content")
with self._pin("my-skill"):
result = _remove_file("my-skill", "references/api.md")
assert result["success"] is False
assert "pinned" in result["error"].lower()
# File still there
assert (tmp_path / "my-skill" / "references" / "api.md").exists()
def test_unpinned_skills_still_editable(self, tmp_path):
"""Sanity check: the guard doesn't fire for unpinned skills.
Only the specifically-pinned skill is refused; a sibling skill must
still be freely editable.
"""
with _skill_dir(tmp_path):
_create_skill("pinned-one", VALID_SKILL_CONTENT)
_create_skill("free-one", VALID_SKILL_CONTENT)
with self._pin("pinned-one"):
blocked = _edit_skill("pinned-one", VALID_SKILL_CONTENT_2)
allowed = _edit_skill("free-one", VALID_SKILL_CONTENT_2)
assert blocked["success"] is False
assert allowed["success"] is True
def test_broken_sidecar_fails_open(self, tmp_path):
"""If skill_usage.get_record raises, we allow the write through.
Rationale: a corrupted telemetry file shouldn't lock the agent out
of skills it would otherwise be allowed to touch.
"""
with _skill_dir(tmp_path):
_create_skill("my-skill", VALID_SKILL_CONTENT)
with patch("tools.skill_usage.get_record",
side_effect=RuntimeError("sidecar broken")):
result = _edit_skill("my-skill", VALID_SKILL_CONTENT_2)
assert result["success"] is True