Merge lab into test/document-module-set-helper

Resolve the overlap with #19 by preserving the whole-cascade stylesheet
helpers alongside #31's document-source/module-set helpers.

Maintainer validation:
- document/module contract and composition guards: 15 passed
- all 54 touched Python test modules: 366 passed
- py_compile: clean
- git diff --check: clean

core/platform_compat.py

@@ -36,6 +36,19 @@ IS_APPLE_SILICON = (
 )
 
 
+# ── procfs ──────────────────────────────────────────────────────────────────
+# Linux exposes one directory per pid under /proc; macOS and Windows have no
+# procfs at all. Any code that walks it must skip the walk rather than raise.
+# Kept as a module attribute so both branches stay testable on either kind of
+# host.
+PROC_ROOT = Path("/proc")
+
+
+def has_procfs() -> bool:
+    """True when the host exposes a procfs pid tree that can be scanned."""
+    return PROC_ROOT.is_dir()
+
+
 # ── File permissions ────────────────────────────────────────────────────────
 def safe_chmod(path, mode: int) -> bool:
     """``os.chmod`` that is a harmless no-op on Windows.

routes/mcp/mcp_routes.py

@@ -181,10 +181,17 @@ def setup_mcp_routes(mcp_manager: McpManager):
         if transport == "http" and not url:
             raise HTTPException(400, "url is required for HTTP transport")
 
-        # Parse JSON fields
-        try:
-            parsed_args = json.loads(args) if args else []
-        except json.JSONDecodeError:
+        # Parse JSON fields. args is not defaulted on a parse failure: an
+        # unparseable value is silently discarded downstream (stdio spawns
+        # with an empty argv), so the caller must be told instead.
+        if args:
+            try:
+                parsed_args = json.loads(args)
+            except json.JSONDecodeError:
+                raise HTTPException(400, "args must be valid JSON, e.g. [\"-y\", \"pkg\"]")
+            if not isinstance(parsed_args, list):
+                raise HTTPException(400, "args must be a JSON array, e.g. [\"-y\", \"pkg\"]")
+        else:
             parsed_args = []
         try:
             parsed_env = json.loads(env) if env else {}

src/model_discovery.py

@@ -38,7 +38,10 @@ def discover_tailscale_hosts() -> List[str]:
     global _hosts_cache, _hosts_cache_time
 
     now = time.time()
-    if _hosts_cache and (now - _hosts_cache_time) < _HOSTS_CACHE_TTL:
+    # Gate on the timestamp, not the list: a successful query that found no
+    # eligible peers is a real answer, and testing the list's truthiness made
+    # that case re-run `tailscale status` (up to a 5s timeout) on every call.
+    if _hosts_cache_time and (now - _hosts_cache_time) < _HOSTS_CACHE_TTL:
         return list(_hosts_cache)
 
     hosts = []

src/tools/cookbook.py

@@ -17,6 +17,7 @@ import re
 from typing import Any, Dict, List, Optional
 
 from fastapi import HTTPException
+from core import platform_compat
 from routes._validators import validate_remote_host, validate_ssh_port
 
 from src.tools._common import _parse_tool_args
@@ -676,17 +677,17 @@ def _scan_running_model_processes() -> List[Dict[str, Any]]:
     a dict shaped like a cookbook task so the caller can merge cleanly.
     """
     import os
-    if not os.path.isdir("/proc"):
+    if not platform_compat.has_procfs():
         return []
+    proc_root = platform_compat.PROC_ROOT
     out: List[Dict[str, Any]] = []
     seen_keys = set()
     try:
-        for pid_dir in os.listdir("/proc"):
+        for pid_dir in os.listdir(proc_root):
             if not pid_dir.isdigit():
                 continue
             try:
-                with open(f"/proc/{pid_dir}/cmdline", "rb") as f:
-                    raw = f.read()
+                raw = (proc_root / pid_dir / "cmdline").read_bytes()
             except (OSError, PermissionError):
                 continue
             if not raw:
@@ -1124,12 +1125,16 @@ async def _cookbook_kill_session(session_id: str, *, remote_host: str = "",
             import signal
             tracked_cmd = str((matched.get("payload") or {}).get("_cmd") or "").strip()
             matched_pids: list[int] = []
-            if tracked_cmd:
-                for pid_name in os.listdir("/proc"):
+            # No procfs means no way to match a survivor by its command line.
+            # The tmux kill above already stopped the session, so skip the
+            # sweep instead of failing a stop that worked.
+            if tracked_cmd and platform_compat.has_procfs():
+                proc_root = platform_compat.PROC_ROOT
+                for pid_name in os.listdir(proc_root):
                     if not pid_name.isdigit() or int(pid_name) == os.getpid():
                         continue
                     try:
-                        raw = open(f"/proc/{pid_name}/cmdline", "rb").read()
+                        raw = (proc_root / pid_name / "cmdline").read_bytes()
                         process_cmd = raw.replace(b"\x00", b" ").decode("utf-8", errors="replace").strip()
                     except (OSError, PermissionError):
                         continue

static/css/cookbook-research-memory-settings.css

@@ -28,10 +28,6 @@
       0%, 100% { transform: scale(1); opacity: 1; }
       50% { transform: scale(1.5); opacity: 0.7; }
     }
-@keyframes research-pulse {
-      0%, 100% { background: color-mix(in srgb, var(--red) 12%, transparent); }
-      50% { background: color-mix(in srgb, var(--red) 22%, transparent); }
-    }
 #cookbook-gguf-delete-overlay {
       background:rgba(0,0,0,0.5);
       backdrop-filter:blur(4px);

static/js/admin.js

@@ -3142,6 +3142,7 @@ function initMcpForm() {
     if (transport === 'stdio' && !command) { msg.textContent = 'Command is required for stdio'; msg.className = 'admin-error'; return; }
     if (transport === 'sse' && !url) { msg.textContent = 'URL is required for SSE'; msg.className = 'admin-error'; return; }
     try { JSON.parse(env); } catch { msg.textContent = 'Env must be valid JSON'; msg.className = 'admin-error'; return; }
+    try { JSON.parse(args); } catch { msg.textContent = 'Args must be valid JSON, e.g. ["-y", "pkg"]'; msg.className = 'admin-error'; return; }
     const fd = new FormData();
     fd.append('name', name); fd.append('transport', transport); fd.append('command', command); fd.append('args', args); fd.append('env', env); fd.append('url', url);
     // If preset has oauthFile config, send credentials for file generation
@@ -3162,6 +3163,10 @@ function initMcpForm() {
     try {
       const res = await fetch('/api/mcp/servers', { method: 'POST', body: fd, credentials: 'same-origin' });
       const data = await res.json();
+      if (!res.ok) {
+        msg.textContent = data.detail || `Failed (${res.status})`; msg.className = 'admin-error';
+        return;
+      }
       if (data.needs_oauth) {
         msg.innerHTML = `Added ${esc(name)} — <a href="/api/mcp/oauth/authorize/${data.id}" target="_blank" style="color:var(--red);font-weight:600;">Authorize with Google</a> to connect`;
         msg.className = 'admin-success';

static/js/settings.js

@@ -5102,7 +5102,11 @@ async function initUnifiedIntegrations() {
         fd.append('transport', transport);
         if (transport === 'stdio') {
           fd.append('command', el('uf-mcp-cmd').value);
-          let args = '[]'; try { args = JSON.stringify(JSON.parse(el('uf-mcp-args').value || '[]')); } catch (_) {}
+          // Unlike env below, an unparseable args value is not silently
+          // defaulted: it would spawn the subprocess with an empty argv.
+          let args;
+          try { args = JSON.stringify(JSON.parse(el('uf-mcp-args').value || '[]')); }
+          catch (_) { el('uf-mcp-msg').textContent = 'Args must be valid JSON, e.g. ["-y", "pkg"]'; return; }
           let env  = '{}'; try { env  = JSON.stringify(JSON.parse(el('uf-mcp-env').value  || '{}')); } catch (_) {}
           fd.append('args', args);
           fd.append('env', env);
@@ -5124,7 +5128,12 @@ async function initUnifiedIntegrations() {
           } else if (r.ok) {
             el('uf-mcp-msg').textContent = 'Saved'; formEl.style.display = 'none'; await renderList();
           } else {
-            el('uf-mcp-msg').textContent = `Failed (${r.status})`;
+            // Surface the server's reason. The Args validation above rejects
+            // unparseable JSON, but `"x"` and `{}` parse and are refused by
+            // routes/mcp/mcp_routes.py with a message naming the expected
+            // shape; a bare status code sends the user looking in the wrong
+            // place. Matches what admin.js shows for the same endpoint.
+            el('uf-mcp-msg').textContent = data.detail || `Failed (${r.status})`;
           }
         } catch (_) { el('uf-mcp-msg').textContent = 'Failed'; }
         finally { _setBtnLoading(saveBtn, false, _origLabel); if (cancelBtn) cancelBtn.disabled = false; }

static/style.css

@@ -1480,7 +1480,6 @@ body.bg-pattern-ascii-fireflies {
       0%   { opacity: 1; transform: translateY(0)   translateX(0)   scale(1); }
       100% { opacity: 0; transform: translateY(6px) translateX(-3px) scale(0.94); }
     }
-    @keyframes spin { to { transform: rotate(360deg); } }
     .row { display:flex; gap:6px; align-items:center; }
     .list-item:hover,
     .models-row:hover {
@@ -6119,9 +6118,6 @@ body.bg-pattern-ascii-fireflies {
     #mobile-backdrop, #mobile-menu-btn { display:none !important; }
     #sidebar-backdrop { display:none !important; }
     /* ----- Loading spinner ----- */
-    @keyframes spin {
-      to { transform: rotate(360deg); }
-    }
     .spinner {
       width: 24px;
       height: 24px;
@@ -6240,14 +6236,6 @@ body.bg-pattern-ascii-fireflies {
       .session-skeleton-bubble.is-user { width: 72%; }
       .session-skeleton-line { height: 9px; margin-top: 7px; }
     }
-    @keyframes loading-bounce {
-      0%, 80%, 100% {
-        transform: scale(0);
-      }
-      40% {
-        transform: scale(1);
-      }
-    }
     /* Modal styling */
     .modal {
       position:fixed;
@@ -7555,11 +7543,6 @@ body.bg-pattern-ascii-fireflies {
       animation: pulse 1.5s infinite;
     }
     
-    @keyframes pulse {
-      0% { opacity: 1; }
-      50% { opacity: 0.7; }
-      100% { opacity: 1; }
-    }
     
     #recording-indicator {
       position: fixed;
@@ -8720,7 +8703,6 @@ pre { background: var(--code-bg, var(--hl-bg, #282c34)) !important; }
     }
     .compare-probe-start-anyway svg { color: currentColor; }
     .compare-probe-start-anyway span { font-weight: 700; }
-    @keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
     @keyframes pane-shake {
       0%, 100% { transform: translateX(0); }
       15% { transform: translateX(-3px) rotate(-0.5deg); }

tests/KNOWN_FAILURES.md

@@ -0,0 +1,133 @@
+# Known full-suite failures
+
+`python -m pytest -q` does not come back clean on every machine, and it never
+has. Without a list of which failures are expected, a first local run is
+uninterpretable: you cannot tell "you broke something" from "you are on a Mac",
+so the usual result is either chasing a non-bug or ignoring a real one.
+
+This is that list. It is a record of observation, not a permission slip: a test
+here is still a test that does not pass, and the three that remain below are
+all still worth someone's time.
+
+Last measured: `lab @ c499c01b` plus the fixes in this change, macOS 15 on
+Apple Silicon, Python 3.11, with the **default** `$TMPDIR` — see the socket
+entry below for why that qualifier is load-bearing.
+
+```
+3 failed, 10658 passed, 6 skipped
+```
+
+## Get the prerequisites right first
+
+Most "surprise" failures are a missing dependency rather than anything in this
+file. A clean run needs all of:
+
+```bash
+python3.11 -m venv venv
+./venv/bin/python -m pip install -r requirements.txt
+npm ci                              # the browser tests shell out to node
+npx playwright install chromium     # ~30 tests drive a real browser
+mkdir -p data                       # SQLite lives at ./data/app.db
+```
+
+plus `ffmpeg` on `PATH` for the media tests.
+
+If you already have a ChromaDB running, point `CHROMADB_PORT` at a closed port
+for the run. The client reaches Chroma over HTTP regardless of the data
+directory, so a test run will otherwise attach to whatever store is listening,
+including one holding real data.
+
+Miss `npm ci` and roughly 36 browser tests fail on `Cannot find package
+'playwright'`. That is not a regression, it is the missing install.
+
+## The three that remain, and the seven that no longer do
+
+### Test bugs: comparing an unresolved path against a resolved one
+
+Three failures compared an unresolved `/tmp` path against a resolved
+`/private/tmp` one, and are fixed rather than listed:
+
+- `tests/test_code_nav_tools.py` (two tests) built a fixture under
+  `tempfile.mkdtemp(dir="/tmp")` and compared it against the path the code
+  reports, which it resolves.
+- `tests/test_workspace_confine.py::test_glob_confined_e2e` mixed
+  `os.path.realpath(ws)` with an unresolved secret directory, so `relpath`
+  produced `../../../../tmp/<absolute path>` and the assertion that the
+  absolute path was absent matched it as a substring.
+
+Both now resolve consistently. They are recorded here because the shape recurs:
+on macOS, mixing a resolved and an unresolved temp path is a test bug that
+looks like a platform failure.
+
+### Test bugs: a temp path too long to bind a socket to
+
+Four more, same family, invisible unless `$TMPDIR` is long enough:
+
+- `tests/test_shell_routes.py::TestHostDockerAccess` (three tests)
+- `tests/test_cookbook_docker_access.py::test_container_opt_in_with_unix_socket_is_allowed`
+
+```
+OSError: AF_UNIX path too long
+```
+
+Each bound an `AF_UNIX` socket at `tmp_path / "docker.sock"`. macOS gives
+`sun_path` 104 bytes including the terminator, and pytest's `tmp_path` is
+rooted at `$TMPDIR`, which on a stock Mac is a 49-character
+`/var/folders/<2>/<30>/T/`. Add `pytest-of-<user>/pytest-<n>/` and the test's
+own name and the bind path is 115 bytes before the filename.
+
+This is why the counts above depend on where you run from: under a shortened
+`$TMPDIR` the path lands at 103 and the tests pass, and it tips over the moment
+pytest's run counter reaches two digits. Linux allows 108 bytes and roots
+`$TMPDIR` at `/tmp`, so it never bites there and CI stays green.
+
+They now bind through `tests/helpers/unix_sockets.bound_unix_socket`, which
+puts the socket under a short directory. **Measure with the default `$TMPDIR`**
+— `env -u TMPDIR` or an explicit `/var/folders/...` — or this whole file
+records a run nobody else has.
+
+### Optional dependency: ffmpeg without a WebP encoder
+
+- `tests/test_inspect_media_tool.py::test_inspect_media_exports_final_decodable_frame_at_exact_duration`
+
+```
+ffmpeg still extraction failed: Automatic encoder selection failed ...
+Error opening output files: Encoder not found
+```
+
+The test asks ffmpeg for a `.webp` still and asserts `exit_code == 0`. WebP
+encoding is a build option, and Homebrew's ffmpeg does not always carry it. CI
+installs a build that does, which is why this is green there.
+
+**Needs a decision**: skip when the encoder is absent, or fall back to PNG. The
+current shape asserts success from a codec that is not guaranteed present.
+
+### Environmental: real sockets
+
+- `tests/test_integration_api_call_ssrf.py::test_real_socket_falls_back_from_dead_first_to_live_second`
+
+```
+httpcore.ConnectTimeout / httpx.ConnectTimeout
+```
+
+Opens real sockets and depends on a connection to a dead address being refused
+quickly rather than hanging. Sandboxed and restricted-network machines time out
+instead. Genuinely environmental.
+
+### Unexplained: rich-text colour contrast
+
+- `tests/test_document_rich_color_reset_and_contrast.py::test_rich_colors_follow_theme_and_undo_as_one_edit`
+
+A Playwright run times out waiting for `#doc-email-richbody p` to contain a
+`span` after a colour is applied.
+
+**This one is not flaky.** Three consecutive runs failed identically, each at
+about 31 seconds. It was previously written off as timing noise and that was
+wrong. The cause is not established, and until it is, treat it as a possible
+real defect in the rich-text colour path rather than a platform artifact.
+
+## Keeping this current
+
+Re-measure on a clean checkout of `lab` with the prerequisites above, and
+update the header revision, the counts and any entry that changed. A failure
+that appears and is not listed here is a regression until shown otherwise.

tests/README.md

@@ -33,6 +33,8 @@ the sub-area. The `area_*` names are registered in `pyproject.toml`; the dynamic
 `sub_*` names are registered before collection by `pytest_configure` in
 `tests/conftest.py`, so unknown-mark warnings still flag genuine typos.
 
+The full suite does not come back clean on every machine. [KNOWN_FAILURES.md](KNOWN_FAILURES.md) lists which failures are expected, which are test bugs worth fixing, and the prerequisites a clean run needs; anything not on that list is a regression until shown otherwise.
+
 For common focused runs, use `tests/run_focus.py`. It validates area and
 sub-area names, accepts sub-areas with or without the `sub_` prefix, and passes
 extra pytest arguments after `--`:

tests/conftest.py

@@ -159,3 +159,43 @@ def _serve_test_static():
             os.environ["ODYSSEUS_TEST_STATIC_ORIGIN"] = previous_origin
         server.shutdown()
         server.server_close()
+
+
+@pytest.fixture(autouse=True)
+def _no_leaked_module_stubs():
+    """Fail the test that leaves a bare ``src.*``/``core.*`` stub behind.
+
+    Several test modules install empty stand-in modules so an import-heavy
+    production module can be loaded under the mocks above. When one of those
+    writes is not undone, the stub stays in ``sys.modules`` for the rest of the
+    session and every later test that imports the real module silently gets an
+    empty one instead. The suite still passes as a whole, because the victims
+    usually run before the leak; it only breaks under a different collection
+    order, which is why this class of bug reaches CI green.
+
+    This fixture is declared in the root conftest, so it is set up before any
+    test-module fixture and torn down after all of them — a stub that a test's
+    own teardown removes is not reported. The leaked entries are dropped here
+    as well as reported, so the failure stays attributed to the test that
+    introduced it instead of cascading into the rest of the run.
+
+    Bare stubs present before the test starts are ignored: this guards against
+    new leaks, it does not police import state the session began with.
+    """
+    from tests.helpers.import_state import bare_module_stubs, clear_module
+
+    before = bare_module_stubs()
+    yield
+    leaked = sorted(bare_module_stubs() - before)
+    if not leaked:
+        return
+    for name in leaked:
+        clear_module(name)
+    pytest.fail(
+        "test left bare module stub(s) in sys.modules: "
+        + ", ".join(leaked)
+        + ". Register the stub through monkeypatch.setitem(sys.modules, ...) "
+        "or tests.helpers.import_state.preserve_import_state so it is undone "
+        "at teardown.",
+        pytrace=False,
+    )

tests/helpers/import_state.py

@@ -31,6 +31,7 @@ safe for callers that pass both a parent package and a child module.
 """
 
 import sys
+import types
 from contextlib import contextmanager
 
 _ABSENT = object()
@@ -167,3 +168,33 @@ def preserve_import_state(*module_names):
         # Phase 2: restore all parent-package attributes.
         for name, (_, saved_attr) in saved.items():
             _restore_parent_attr(name, saved_attr)
+
+
+# Names under these prefixes are the ones a leaked stub actually breaks: a
+# later test doing ``import src.x`` or ``import core.x`` silently gets the
+# empty stub instead of the real module.
+_GUARDED_PREFIXES = ("src.", "core.")
+
+
+def bare_module_stubs():
+    """Return the ``src.*``/``core.*`` names currently bound to a bare stub.
+
+    A bare stub is a plain :class:`types.ModuleType` with no on-disk
+    ``__file__`` — the object ``types.ModuleType(name)`` produces. That is the
+    same "is this a fake?" test the ``clear_fake_*`` helpers above use, so a
+    module imported from disk is never reported.
+
+    ``MagicMock`` stand-ins are deliberately out of scope: they answer every
+    attribute, so they fail loudly at use rather than silently, and several
+    test modules install them on purpose.
+    """
+    found = set()
+    for name, mod in list(sys.modules.items()):
+        if not name.startswith(_GUARDED_PREFIXES):
+            continue
+        if type(mod) is not types.ModuleType:
+            continue
+        if getattr(mod, "__file__", None):
+            continue
+        found.add(name)
+    return found

tests/helpers/unix_sockets.py

@@ -0,0 +1,46 @@
+"""Bind an AF_UNIX socket at a path the kernel will actually accept.
+
+``sun_path`` is 104 bytes on macOS, terminator included, so a bind path longer
+than 103 characters fails with ``OSError: AF_UNIX path too long``. pytest's
+``tmp_path`` is rooted at ``$TMPDIR``, which on stock macOS is a 49-character
+``/var/folders/<2>/<30>/T/`` path; adding ``pytest-of-<user>/pytest-<n>/`` and
+the test's own (truncated) name spends the rest of the budget before the
+filename is appended.
+
+That is why this reads as flaky rather than broken. Linux allows 108 bytes and
+roots ``$TMPDIR`` at ``/tmp``, so it never bites there; on macOS whether it
+bites depends on the length of ``$TMPDIR``, the test's name, and how many
+digits pytest's run counter is currently using. A run under a shortened
+``$TMPDIR`` passes, the same checkout under the default one does not.
+
+The path is resolved before it is handed back, for the same reason the rest of
+this change resolves temp paths: on macOS ``/tmp`` is a symlink to
+``/private/tmp``, and a test that binds one spelling and asserts on the other
+is comparing two names for the same socket.
+"""
+
+import os
+import shutil
+import socket
+import tempfile
+from contextlib import contextmanager
+
+# Short enough to leave room for the socket's own name under every platform's
+# sun_path budget. A relative root would depend on the working directory.
+_SHORT_ROOT = os.path.realpath(tempfile.gettempdir() if os.name == "nt" else "/tmp")
+
+
+@contextmanager
+def bound_unix_socket(name="docker.sock"):
+    """Yield the path of a listening AF_UNIX socket, cleaned up on exit."""
+    directory = os.path.realpath(tempfile.mkdtemp(prefix="odysseus-sock-", dir=_SHORT_ROOT))
+    path = os.path.join(directory, name)
+    if len(path) > 103:  # pragma: no cover - guards the guard
+        raise AssertionError(f"socket path is {len(path)} bytes, over the limit: {path}")
+    sock = socket.socket(socket.AF_UNIX)
+    try:
+        sock.bind(path)
+        yield path
+    finally:
+        sock.close()
+        shutil.rmtree(directory, ignore_errors=True)

tests/test_agent_thread_chevron_static.py

@@ -1,4 +1,5 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
@@ -7,7 +8,7 @@ ROOT = Path(__file__).resolve().parents[1]
 def test_agent_thread_chevron_uses_css_shape_in_live_and_history_renderers():
     live = (ROOT / "static/js/chat.js").read_text()
     history = (ROOT / "static/js/chatRenderer.js").read_text()
-    css = (ROOT / "static/style.css").read_text()
+    css = app_css()
 
     for src in (live, history):
         assert 'class="agent-thread-chevron" aria-hidden="true"></span>' in src

tests/test_agent_thread_dot_alignment_css.py

@@ -14,11 +14,10 @@ file identifies the breakpoint it belongs to.
 
 import re
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
-CSS = (Path(__file__).resolve().parents[1] / "static" / "style.css").read_text(
-    encoding="utf-8"
-)
+CSS = app_css()
 
 THREAD = r"^[ \t]*\.agent-thread[ \t]*\{"
 RAIL = r"^[ \t]*\.agent-thread::before[ \t]*\{"

tests/test_auth_regressions.py

@@ -21,7 +21,7 @@ from unittest.mock import MagicMock
 # (Same trick as test_null_owner_gates.py — the real modules instantiate
 # SQLAlchemy declarative classes at import-time which blow up under the
 # conftest's `sqlalchemy.*` MagicMock stubs.)
-def _ensure_stub(name: str, **attrs):
+def _ensure_stub(monkeypatch, name: str, **attrs):
     """Create or augment a stub module with the given attributes.
     Augments existing entries because earlier-run tests may have already
     stubbed the same module with a different attribute set.
@@ -48,7 +48,7 @@ def _ensure_stub(name: str, **attrs):
                 *parent_name.split("."),
             )
             parent.__path__ = [real_path] if os.path.isdir(real_path) else []
-            sys.modules[parent_name] = parent
+            monkeypatch.setitem(sys.modules, parent_name, parent)
         else:
             parent = sys.modules[parent_name]
     else:
@@ -58,17 +58,17 @@ def _ensure_stub(name: str, **attrs):
     mod = sys.modules.get(name)
     if mod is None:
         mod = types.ModuleType(name)
-        sys.modules[name] = mod
+        monkeypatch.setitem(sys.modules, name, mod)
     for k, v in attrs.items():
         if not hasattr(mod, k):
-            setattr(mod, k, v)
+            monkeypatch.setattr(mod, k, v, raising=False)
     if parent is not None and not hasattr(parent, child_name):
-        setattr(parent, child_name, mod)
+        monkeypatch.setattr(parent, child_name, mod, raising=False)
     return mod
 
 @pytest.fixture(autouse=True)
 def _auth_regressions_stubs(monkeypatch):
-    db = _ensure_stub("core.database",
+    db = _ensure_stub(monkeypatch, "core.database",
         SessionLocal=MagicMock(), ScheduledTask=MagicMock(), TaskRun=MagicMock(),
         ModelEndpoint=MagicMock(), Session=MagicMock(), ChatMessage=MagicMock(),
         CalendarCal=MagicMock(), CalendarEvent=MagicMock(),
@@ -76,17 +76,18 @@ def _auth_regressions_stubs(monkeypatch):
         GalleryImage=MagicMock(), GalleryAlbum=MagicMock(), Note=MagicMock(),
         McpServer=MagicMock(),
     )
-    auth = _ensure_stub("core.auth", AuthManager=MagicMock())
-    ep = _ensure_stub("src.endpoint_resolver",
+    auth = _ensure_stub(monkeypatch, "core.auth", AuthManager=MagicMock())
+    ep = _ensure_stub(monkeypatch, "src.endpoint_resolver",
         resolve_endpoint=MagicMock(return_value=("", "", {})),
         normalize_base=MagicMock(),
         build_chat_url=MagicMock(),
         build_models_url=MagicMock(),
         build_headers=MagicMock(),
     )
-    monkeypatch.setitem(sys.modules, "core.database", db)
-    monkeypatch.setitem(sys.modules, "core.auth", auth)
-    monkeypatch.setitem(sys.modules, "src.endpoint_resolver", ep)
+    # _ensure_stub now registers each stub through monkeypatch itself, so the
+    # whole set is undone at teardown. Re-setting them here would capture the
+    # stub as the restore target and leave it behind for the rest of the run.
+    assert db and auth and ep
 
 from fastapi import HTTPException
 
@@ -293,7 +294,7 @@ def test_research_spinoff_rejects_wrong_owner():
 # pop_notifications owner filter
 # ---------------------------------------------------------------------------
 
-def test_pop_notifications_owner_filtered():
+def test_pop_notifications_owner_filtered(monkeypatch):
     """pop_notifications(owner='alice') must return only alice's items.
     bob's and legacy ownerless items stay behind in the queue."""
     # Build a minimal scheduler instance that we can hit directly.
@@ -302,11 +303,15 @@ def test_pop_notifications_owner_filtered():
     import sys, types
     from unittest.mock import MagicMock as _MM
     # `task_scheduler` pulls in lots of helpers — stub the ones it uses.
+    # monkeypatch.setitem, not a bare assignment: a plain write leaves these
+    # empty stubs in sys.modules for the rest of the session, and every later
+    # test that imports a real name from one of them fails with
+    # "cannot import name ... (unknown location)". The stubs above in this file
+    # already use monkeypatch for the same reason.
     for s in ["src.builtin_actions", "src.ai_interaction", "src.endpoint_resolver",
               "src.agent_loop", "src.session_manager"]:
         if s not in sys.modules:
-            mod = types.ModuleType(s)
-            sys.modules[s] = mod
+            monkeypatch.setitem(sys.modules, s, types.ModuleType(s))
     from src.task_scheduler import TaskScheduler
     sch = TaskScheduler.__new__(TaskScheduler)  # bypass __init__ network etc.
     sch._pending_notifications = []

tests/test_background_chat_completion_ui_static.py

@@ -1,10 +1,11 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
 CHAT = (ROOT / "static/js/chat.js").read_text()
 SESSIONS = (ROOT / "static/js/sessions.js").read_text()
-CSS = (ROOT / "static/style.css").read_text()
+CSS = app_css()
 
 
 def test_queued_prompts_are_persisted_per_session_and_restored_on_return():

tests/test_calendar_event_contrast.py

@@ -4,11 +4,12 @@ import subprocess
 from pathlib import Path
 
 import pytest
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
 CALENDAR_JS = ROOT / "static" / "js" / "calendar.js"
-STYLE_CSS = ROOT / "static" / "style.css"
+STYLE_CSS_TEXT = app_css()
 UTILS_JS = ROOT / "static" / "js" / "calendar" / "utils.js"
 
 pytestmark = pytest.mark.skipif(not shutil.which("node"), reason="node binary not on PATH")
@@ -65,7 +66,7 @@ def test_calendar_readable_text_color_keeps_light_text_for_dark_colors():
 
 def test_calendar_event_surfaces_use_computed_foreground_variable():
     calendar_js = CALENDAR_JS.read_text(encoding="utf-8")
-    style_css = STYLE_CSS.read_text(encoding="utf-8")
+    style_css = STYLE_CSS_TEXT
     utils_js = UTILS_JS.read_text(encoding="utf-8")
 
     assert "_calReadableTextColor" in utils_js

tests/test_card_menu_style_contract.py

@@ -1,8 +1,9 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
-STYLE = (ROOT / "static/style.css").read_text(encoding="utf-8")
+STYLE = app_css()
 LIBRARY = (ROOT / "static/js/documentLibrary.js").read_text(encoding="utf-8")
 
 

tests/test_chat_mode_pill_static.py

@@ -1,4 +1,5 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
@@ -7,7 +8,7 @@ ROOT = Path(__file__).resolve().parents[1]
 def test_user_mode_pill_is_rendered_and_live_updated():
     renderer = (ROOT / "static/js/chatRenderer.js").read_text(encoding="utf-8")
     chat = (ROOT / "static/js/chat.js").read_text(encoding="utf-8")
-    styles = (ROOT / "static/style.css").read_text(encoding="utf-8")
+    styles = app_css()
     routes = (ROOT / "routes/chat_routes.py").read_text(encoding="utf-8")
     helpers = (ROOT / "routes/chat_helpers.py").read_text(encoding="utf-8")
 

tests/test_chatgpt_reasoning_and_grouping.py

@@ -12,6 +12,7 @@ import subprocess
 import pytest
 
 from src import chatgpt_subscription, llm_core
+from tests.helpers.stylesheets import app_css
 
 ROOT = Path(__file__).parents[1]
 
@@ -101,7 +102,7 @@ def test_model_picker_source_invariants():
 def test_composer_reasoning_effort_ui_markup():
     """Verify static/index.html and static/style.css include reasoning effort controls."""
     html = (ROOT / "static/index.html").read_text(encoding="utf-8")
-    css = (ROOT / "static/style.css").read_text(encoding="utf-8")
+    css = app_css()
     # HTML elements
     assert 'id="reasoning-effort-wrap"' in html
     assert 'id="reasoning-effort-btn"' in html

tests/test_chatgpt_subscription_usage_js.py

@@ -6,11 +6,12 @@ import subprocess
 from pathlib import Path
 
 import pytest
+from tests.helpers.stylesheets import app_css
 
 _REPO = Path(__file__).resolve().parent.parent
 _MODULE = _REPO / "static" / "js" / "chatgptSubscriptionUsage.js"
 _ADMIN = (_REPO / "static" / "js" / "admin.js").read_text(encoding="utf-8")
-_STYLE = (_REPO / "static" / "style.css").read_text(encoding="utf-8")
+_STYLE = app_css()
 pytestmark = pytest.mark.skipif(not shutil.which("node"), reason="node not on PATH")
 
 
@@ -269,7 +270,7 @@ def test_refresh_and_reconnect_handlers_target_only_the_clicked_account():
 
 def test_admin_renders_chatgpt_usage_collapsible_and_styled():
     admin_source = (_REPO / "static" / "js" / "admin.js").read_text(encoding="utf-8")
-    style_source = (_REPO / "static" / "style.css").read_text(encoding="utf-8")
+    style_source = app_css()
     load_block = admin_source[admin_source.index("async function loadEndpoints()"):admin_source.index("function initEndpointForm()")]
     assert "adm-chatgpt-controls" in load_block
     assert "adm-chatgpt-usage-toggle" in load_block

tests/test_code_nav_tools.py

@@ -17,7 +17,10 @@ def _run(tool, content):
 @pytest.fixture
 def repo():
     # Built under /tmp, which is on the default tool-path allowlist.
-    root = tempfile.mkdtemp(dir="/tmp", prefix="codenav_")
+    # realpath because the code under test resolves the path it reports, and on
+    # macOS /tmp is a symlink to /private/tmp: comparing the unresolved path
+    # against the resolved one fails on a file both sides found correctly.
+    root = os.path.realpath(tempfile.mkdtemp(dir="/tmp", prefix="codenav_"))
     try:
         with open(os.path.join(root, "a.py"), "w") as f:
             f.write("import os\n# needle here\nprint('x')\n")

tests/test_compare_ask_user_routing.py

@@ -1,5 +1,6 @@
 from pathlib import Path
 import re
+from tests.helpers.stylesheets import app_css
 
 
 def test_compare_renders_ask_user_in_the_originating_pane():
@@ -80,7 +81,7 @@ def test_compare_pane_templates_hide_response_actions_until_response_exists():
     root = Path(__file__).resolve().parents[1]
     index = (root / "static/js/compare/index.js").read_text(encoding="utf-8")
     panes = (root / "static/js/compare/panes.js").read_text(encoding="utf-8")
-    styles = (root / "static/style.css").read_text(encoding="utf-8")
+    styles = app_css()
 
     assert re.search(r"from './panes\.js\?v=[A-Za-z0-9_-]+'", index)
     assert re.search(r"from './selector\.js\?v=[A-Za-z0-9_-]+'", index)
@@ -152,7 +153,7 @@ def test_compare_panes_have_visible_runtime_state_without_revealing_empty_action
     root = Path(__file__).resolve().parents[1]
     stream = (root / "static/js/compare/stream.js").read_text(encoding="utf-8")
     panes = (root / "static/js/compare/panes.js").read_text(encoding="utf-8")
-    styles = (root / "static/style.css").read_text(encoding="utf-8")
+    styles = app_css()
 
     assert "_paneEl.classList.remove('is-done', 'is-failed', 'is-awaiting-input');" in stream
     assert "_paneEl.classList.add('is-streaming');" in stream
@@ -179,7 +180,7 @@ def test_compare_panes_surface_compact_result_summary():
     index = (root / "static/js/compare/index.js").read_text(encoding="utf-8")
     panes = (root / "static/js/compare/panes.js").read_text(encoding="utf-8")
     stream = (root / "static/js/compare/stream.js").read_text(encoding="utf-8")
-    styles = (root / "static/style.css").read_text(encoding="utf-8")
+    styles = app_css()
 
     assert 'pane-header-row pane-header-secondary' in index
     assert 'class=\"pane-summary\" id=\"cmp-summary-' in index
@@ -203,7 +204,7 @@ def test_compare_panes_surface_compact_result_summary():
 def test_compare_selector_surfaces_duplicate_warning_without_blocking_start():
     root = Path(__file__).resolve().parents[1]
     selector = (root / "static/js/compare/selector.js").read_text(encoding="utf-8")
-    styles = (root / "static/style.css").read_text(encoding="utf-8")
+    styles = app_css()
 
     assert "function _selectionKey(sel)" in selector
     assert "function _duplicateSelectionKeys()" in selector

tests/test_compare_mobile_tabs_static.py

@@ -1,4 +1,5 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parent.parent
@@ -32,7 +33,7 @@ def test_mobile_compare_reconciles_tabs_after_pane_lifecycle_changes():
 
 
 def test_mobile_compare_css_shows_only_the_active_card():
-    css = _read("static/style.css")
+    css = app_css()
     mobile = css[css.index("/* Compare uses one full-width response card on phones."):]
 
     assert ".compare-mobile-tabs" in mobile
@@ -44,7 +45,7 @@ def test_mobile_compare_css_shows_only_the_active_card():
 
 def test_probe_feedback_and_actions_use_the_shared_card_layout():
     selector = _read("static/js/compare/selector.js")
-    css = _read("static/style.css")
+    css = app_css()
 
     assert "probeFeedback.className = 'compare-probe-feedback'" in selector
     assert "probeFeedback.appendChild(detail)" in selector
@@ -66,7 +67,7 @@ def test_probe_feedback_and_actions_use_the_shared_card_layout():
 
 def test_probe_swap_reopens_and_highlights_the_failed_model_slot():
     selector = _read("static/js/compare/selector.js")
-    css = _read("static/style.css")
+    css = app_css()
 
     assert "function _expandModelSlot(slotIdx)" in selector
     assert "row.dataset.slotIndex = String(idx);" in selector

tests/test_compare_shuffle_visual_static.py

@@ -1,5 +1,6 @@
 from pathlib import Path
 import re
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parent.parent
@@ -11,7 +12,7 @@ def _read(path: str) -> str:
 
 def test_compare_shuffle_shows_center_notice_with_dice_icon():
     panes = _read("static/js/compare/panes.js")
-    css = _read("static/style.css")
+    css = app_css()
 
     assert "ICON_DICE" in panes
     assert "compare-shuffle-notice" in panes
@@ -23,7 +24,7 @@ def test_compare_shuffle_shows_center_notice_with_dice_icon():
 def test_compare_chat_and_agent_panes_expose_per_pane_inference_settings():
     index = _read("static/js/compare/index.js")
     panes = _read("static/js/compare/panes.js")
-    css = _read("static/style.css")
+    css = app_css()
 
     assert "pane-settings-btn" in panes
     assert "paneSettingsButtonHtml" in index
@@ -41,7 +42,7 @@ def test_compare_chat_and_agent_panes_expose_per_pane_inference_settings():
 def test_compare_probe_control_has_requested_vertical_alignment():
     index = _read("static/js/compare/index.js")
     probe = _read("static/js/compare/probe.js")
-    css = _read("static/style.css")
+    css = app_css()
 
     assert 'class="compare-check-icon"' in index
     assert '<span class="compare-check-label">Probe</span>' in index
@@ -75,7 +76,7 @@ def test_compare_cache_key_bumped_for_shuffle_notice():
 
 def test_compare_score_button_label_is_nudged_up():
     vote = _read("static/js/compare/vote.js")
-    css = _read("static/style.css")
+    css = app_css()
 
     assert '<span class="compare-score-label">Score</span>' in vote
     assert ".compare-score-label" in css

tests/test_cookbook_docker_access.py

@@ -1,4 +1,3 @@
-import socket
 from unittest.mock import AsyncMock
 
 import pytest
@@ -9,6 +8,7 @@ from starlette.requests import Request
 import routes.cookbook_routes as cookbook_routes
 from routes.cookbook_helpers import ServeRequest, _validate_serve_cmd
 from src.host_docker_access import HOST_DOCKER_ACCESS_HINT
+from tests.helpers.unix_sockets import bound_unix_socket
 
 
 def _model_serve_endpoint():
@@ -57,19 +57,18 @@ async def test_container_cli_only_is_rejected(monkeypatch, tmp_path):
 
 
 @pytest.mark.asyncio
-async def test_container_opt_in_with_unix_socket_is_allowed(monkeypatch, tmp_path):
+async def test_container_opt_in_with_unix_socket_is_allowed(monkeypatch):
     monkeypatch.setattr(cookbook_routes.shutil, "which", lambda binary: "/usr/bin/docker")
-    socket_path = tmp_path / "docker.sock"
 
-    with socket.socket(socket.AF_UNIX) as unix_socket:
-        unix_socket.bind(str(socket_path))
+    # Not tmp_path: binding under $TMPDIR overruns sun_path on macOS.
+    with bound_unix_socket() as socket_path:
         available = await cookbook_routes._binary_available(
             "docker",
             None,
             None,
             in_container=True,
             environ={"ODYSSEUS_ENABLE_HOST_DOCKER": "true"},
-            socket_path=str(socket_path),
+            socket_path=socket_path,
         )
 
     assert available is True

tests/test_cookbook_stop_without_procfs.py

@@ -0,0 +1,166 @@
+"""Stopping a Cookbook server must succeed on a host with no procfs.
+
+The tmux kill is what actually stops the server; the pid sweep that follows
+it only catches model servers that survive the session's SIGHUP. On macOS and
+Windows there is no ``/proc`` to sweep, and letting that raise turned a
+successful stop into a reported failure *and* skipped the state write that
+marks the session stopped for the Cookbook UI.
+"""
+import asyncio
+import json
+import signal
+
+import pytest
+
+from core import platform_compat
+from src import tool_implementations as tools
+
+
+class FakeResponse:
+    def __init__(self, data=None, status_code=200):
+        self._data = data or {}
+        self.status_code = status_code
+        self.text = json.dumps(self._data)
+
+    def json(self):
+        return self._data
+
+
+def _tracked_state(session_id="serve-abc123", cmd="python -m vllm.entrypoints.openai.api_server"):
+    return {
+        "tasks": [
+            {
+                "sessionId": session_id,
+                "model": "org/model",
+                "type": "serve",
+                "status": "running",
+                "payload": {"_cmd": cmd},
+            }
+        ]
+    }
+
+
+def _install_httpx_client(monkeypatch, state):
+    """Serve cookbook state over a fake httpx and record every POST body."""
+    import httpx
+
+    posts = []
+
+    class FakeAsyncClient:
+        def __init__(self, *args, **kwargs):
+            pass
+
+        async def __aenter__(self):
+            return self
+
+        async def __aexit__(self, exc_type, exc, tb):
+            return False
+
+        async def get(self, url, **kwargs):
+            return FakeResponse(state)
+
+        async def post(self, url, json=None, **kwargs):
+            posts.append((url, json))
+            return FakeResponse({"ok": True})
+
+    monkeypatch.setattr(httpx, "AsyncClient", FakeAsyncClient)
+    return posts
+
+
+def _install_successful_tmux_kill(monkeypatch):
+    """Replace the real ``tmux kill-session`` with a process that succeeds."""
+
+    class FakeProc:
+        returncode = 0
+
+        async def communicate(self):
+            return b"", b""
+
+    async def fake_exec(*argv, **kwargs):
+        assert argv[:2] == ("tmux", "kill-session")
+        return FakeProc()
+
+    monkeypatch.setattr(asyncio, "create_subprocess_exec", fake_exec)
+
+
+def _stopped_statuses(posts, session_id):
+    out = []
+    for _url, body in posts:
+        for task in (body or {}).get("tasks") or []:
+            if task.get("sessionId") == session_id:
+                out.append(task.get("status"))
+    return out
+
+
+@pytest.mark.asyncio
+async def test_stop_marks_session_stopped_when_the_host_has_no_procfs(
+    monkeypatch, tmp_path
+):
+    state = _tracked_state()
+    posts = _install_httpx_client(monkeypatch, state)
+    _install_successful_tmux_kill(monkeypatch)
+    monkeypatch.setattr(platform_compat, "PROC_ROOT", tmp_path / "no-procfs")
+
+    import os
+
+    def _unexpected_listdir(*args, **kwargs):
+        raise AssertionError("the pid sweep must not run without procfs")
+
+    monkeypatch.setattr(os, "listdir", _unexpected_listdir)
+
+    result = await tools.do_stop_served_model(
+        json.dumps({"session_id": "serve-abc123"})
+    )
+
+    assert result == {"output": "Stopped server serve-abc123", "exit_code": 0}
+    assert _stopped_statuses(posts, "serve-abc123") == ["stopped"]
+
+
+@pytest.mark.asyncio
+async def test_stop_sweeps_surviving_pids_when_procfs_is_present(
+    monkeypatch, tmp_path
+):
+    tracked_cmd = "python -m vllm.entrypoints.openai.api_server --model org/model"
+    state = _tracked_state(cmd=tracked_cmd)
+    posts = _install_httpx_client(monkeypatch, state)
+    _install_successful_tmux_kill(monkeypatch)
+
+    proc = tmp_path / "proc"
+
+    def _write_pid(pid, cmdline):
+        entry = proc / pid
+        entry.mkdir(parents=True)
+        (entry / "cmdline").write_bytes(cmdline.replace(" ", "\0").encode())
+
+    _write_pid("101", tracked_cmd)
+    _write_pid("202", "python -m http.server")
+    (proc / "self").mkdir()
+    monkeypatch.setattr(platform_compat, "PROC_ROOT", proc)
+
+    signalled = []
+    import os
+
+    monkeypatch.setattr(os, "kill", lambda pid, sig: signalled.append((pid, sig)))
+
+    result = await tools.do_stop_served_model(
+        json.dumps({"session_id": "serve-abc123"})
+    )
+
+    assert result["exit_code"] == 0
+    assert (101, signal.SIGTERM) in signalled
+    assert not any(pid == 202 for pid, _sig in signalled)
+    assert _stopped_statuses(posts, "serve-abc123") == ["stopped"]
+
+
+def test_model_process_scan_returns_empty_without_procfs(monkeypatch, tmp_path):
+    """The other procfs scan in the same module already guards; pin it."""
+    monkeypatch.setattr(platform_compat, "PROC_ROOT", tmp_path / "no-procfs")
+
+    import os
+
+    def _unexpected_listdir(*args, **kwargs):
+        raise AssertionError("the model-process scan must not run without procfs")
+
+    monkeypatch.setattr(os, "listdir", _unexpected_listdir)
+
+    assert tools._scan_running_model_processes() == []

tests/test_dialog_aria.py

@@ -10,6 +10,7 @@ of the other tests in this suite.
 """
 import re
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 _REPO = Path(__file__).resolve().parent.parent
 _INDEX = (_REPO / "static" / "index.html").read_text(encoding="utf-8")
@@ -47,7 +48,7 @@ def test_styled_confirm_and_prompt_are_modal_dialogs():
 
 
 def test_styled_confirm_cancel_or_close_label_is_shifted_without_moving_button():
-    css = (_REPO / "static" / "style.css").read_text(encoding="utf-8")
+    css = app_css()
 
     assert "cancelLabel.textContent = cancelText;" in _UI
     assert "cancelBtn.appendChild(cancelLabel);" in _UI

tests/test_doc_library_open_orphaned.py

@@ -18,6 +18,7 @@ import re
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import stylesheet_link_tags
 
 SRC = Path(__file__).resolve().parent.parent / "static/js/documentLibrary.js"
 
@@ -96,7 +97,7 @@ def test_mobile_explicit_load_restores_full_editor_from_bottom_dock():
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 390, height: 844 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       const state = await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&mobile-library-open-test=1');
         mod.init('/api');
@@ -134,6 +135,7 @@ def test_mobile_explicit_load_restores_full_editor_from_bottom_dock():
       console.log(JSON.stringify(state));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=SRC.parents[1],

tests/test_document_edit_reference_js.py

@@ -1,13 +1,14 @@
 """Regression guards for document-selection references in chat bubbles."""
 
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 from tests.helpers.document_source import document_source
 
 
 ROOT = Path(__file__).resolve().parents[1]
 RENDERER = (ROOT / "static/js/chatRenderer.js").read_text(encoding="utf-8")
 DOCUMENT = document_source()
-STYLE = (ROOT / "static/style.css").read_text(encoding="utf-8")
+STYLE = app_css()
 INDEX = (ROOT / "static/index.html").read_text(encoding="utf-8")
 APP = (ROOT / "static/app.js").read_text(encoding="utf-8")
 

tests/test_document_editor_scroll.py

@@ -9,12 +9,12 @@ document.js is browser-coupled and not importable in pytest.
 """
 
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 from tests.helpers.document_source import document_source
 
-
 ROOT = Path(__file__).resolve().parents[1]
 DOC_JS = document_source()
-STYLE_CSS = (ROOT / "static/style.css").read_text(encoding="utf-8")
+STYLE_CSS = app_css()
 
 
 def test_document_textarea_scrollbar_is_visible():

tests/test_document_history_controls.py

@@ -3,6 +3,7 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source
 
 
@@ -25,7 +26,7 @@ def test_mobile_rich_text_history_state_and_document_switch():
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 390, height: 844 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&history-controls-test=1');
         window.documentModuleForTest = mod;
@@ -86,6 +87,7 @@ def test_mobile_rich_text_history_state_and_document_switch():
       console.log(JSON.stringify({ initial, typed, undone, redone, switched, overflow }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_library_mobile_footer.py

@@ -3,11 +3,13 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
+from tests.helpers.stylesheets import stylesheet_link_tags
 
 
 ROOT = Path(__file__).resolve().parents[1]
 SOURCE = (ROOT / "static/js/documentLibrary.js").read_text(encoding="utf-8")
-STYLE = (ROOT / "static/style.css").read_text(encoding="utf-8")
+STYLE = app_css()
 
 
 def test_mobile_footer_exposes_delete_open_and_more():
@@ -53,7 +55,7 @@ def test_mobile_open_in_new_chat_copies_to_materialized_session():
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 390, height: 844 }, hasTouch: true });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       const state = await page.evaluate(async () => {
         let currentSession = 'current-chat';
         let createDirectCalls = 0;
@@ -106,6 +108,7 @@ def test_mobile_open_in_new_chat_copies_to_materialized_session():
       console.log(JSON.stringify(state));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_outline.py

@@ -3,12 +3,13 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source
 
-
 ROOT = Path(__file__).resolve().parents[1]
 DOC_JS = document_source()
-STYLE = (ROOT / "static/style.css").read_text(encoding="utf-8")
+STYLE = app_css()
 
 
 def _run_node(script: str):
@@ -42,7 +43,7 @@ def test_markdown_outline_parses_structure_and_ignores_fenced_code():
           '#### Final `code` section',
         ].join('\n');
         console.log(JSON.stringify(parseMarkdownOutline(source)));
-        """
+        """.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     )
     assert [(entry["level"], entry["text"]) for entry in data] == [
         (1, "Overview"),
@@ -72,7 +73,7 @@ def test_outline_jumps_in_markdown_and_rich_text_and_fits_mobile():
         const browser = await chromium.launch({ headless: true });
         const page = await browser.newPage({ viewport: { width: 900, height: 700 } });
         await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentOutline.js`);
-        await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+        await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
         await page.evaluate(async () => {
           const mod = await import('/static/js/document.js?v=20260831richtexttools91&outline-test=1');
           mod.init('/api');
@@ -127,7 +128,7 @@ def test_outline_jumps_in_markdown_and_rich_text_and_fits_mobile():
 
         console.log(JSON.stringify({ markdownLabels, selected, liveLabels, mobileBox, richLabels, richCaretHeading }));
         await browser.close();
-        """
+        """.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     )
     assert data["markdownLabels"] == ["Intro", "Details", "End"]
     assert data["selected"] == "## Details"

tests/test_document_preview_edit_button.py

@@ -1,12 +1,12 @@
 """Regression guards for the Markdown preview hover-to-edit control."""
 
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 from tests.helpers.document_source import document_source
 
-
 ROOT = Path(__file__).resolve().parents[1]
 DOC_JS = document_source()
-STYLE_CSS = (ROOT / "static/style.css").read_text(encoding="utf-8")
+STYLE_CSS = app_css()
 
 
 def test_preview_installs_hover_edit_button():

tests/test_document_rich_checklist_enter.py

@@ -3,6 +3,7 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source
 
 
@@ -27,7 +28,7 @@ def test_enter_creates_unchecked_task_and_empty_enter_exits_cleanly():
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 390, height: 844 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentOutline.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&checklist-enter-test=1');
         mod.init('/api');
@@ -79,6 +80,7 @@ def test_enter_creates_unchecked_task_and_empty_enter_exits_cleanly():
       console.log(JSON.stringify({ afterFirstEnter, ...data }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_rich_color_reset_and_contrast.py

@@ -3,12 +3,13 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source
 
-
 ROOT = Path(__file__).resolve().parents[1]
 DOC_JS = document_source()
-STYLE = (ROOT / "static/style.css").read_text(encoding="utf-8")
+STYLE = app_css()
 
 
 def test_color_controls_have_theme_reset_and_split_palettes():
@@ -21,6 +22,12 @@ def test_color_controls_have_theme_reset_and_split_palettes():
 
 
 def test_rich_colors_follow_theme_and_undo_as_one_edit():
+    # Two input conventions in here are platform-sensitive and must stay that
+    # way. Palette entries are opened with a plain click: on macOS a
+    # Control+click is delivered as `contextmenu`, so the menu item's `click`
+    # handler never runs and nothing is applied. Undo uses Playwright's
+    # `ControlOrMeta` alias because the editor's undo accelerator is Cmd+Z on
+    # macOS and Ctrl+Z everywhere else.
     script = r"""
       import { chromium } from 'playwright';
       const browser = await chromium.launch({ headless: true });
@@ -28,7 +35,7 @@ def test_rich_colors_follow_theme_and_undo_as_one_edit():
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
       await page.setContent(`<style>
         :root { --fg:#d8dee9; --bg:#17191f; --panel:#20232b; --border:#444; --red:#e45b6c; --accent-primary:#e45b6c; }
-      </style><link rel="stylesheet" href="/static/style.css?rich-color-test=1">
+      </style>__ODY_STYLESHEETS__
       <div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>`);
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?rich-color-test=' + Date.now());
@@ -59,28 +66,29 @@ def test_rich_colors_follow_theme_and_undo_as_one_edit():
         labels: [...document.querySelectorAll('.rich-color-palette-label')].map(item => item.textContent),
         reset: document.querySelector('.rich-color-reset')?.textContent.trim(),
       }));
-      await page.locator('#doc-md-dd-menu .doc-overflow-item').filter({ hasText: 'Lemon' }).click({ modifiers: ['Control'] });
+      await page.locator('#doc-md-dd-menu .doc-overflow-item').filter({ hasText: 'Lemon' }).click();
       const highlighted = await page.locator('#doc-email-richbody p').nth(0).locator('span').evaluate(span => ({
         color: getComputedStyle(span).color,
         background: getComputedStyle(span).backgroundColor,
       }));
-      await page.locator('#doc-email-richbody').press('Control+z');
+      await page.locator('#doc-email-richbody').press('ControlOrMeta+z');
       const highlightUndone = await page.locator('#doc-email-richbody p').nth(0).innerHTML();
 
       await selectParagraph(1);
       await openMenu('color');
-      await page.locator('.rich-color-reset').click({ modifiers: ['Control'] });
+      await page.locator('.rich-color-reset').click();
       const defaultColor = await page.locator('#doc-email-richbody p').nth(1).locator('span').evaluate(span => ({
         style: span.getAttribute('style'),
         color: getComputedStyle(span).color,
       }));
       await page.evaluate(() => document.documentElement.style.setProperty('--fg', '#88cc44'));
       const changedThemeColor = await page.locator('#doc-email-richbody p').nth(1).locator('span').evaluate(span => getComputedStyle(span).color);
-      await page.locator('#doc-email-richbody').press('Control+z');
+      await page.locator('#doc-email-richbody').press('ControlOrMeta+z');
       const colorUndone = await page.locator('#doc-email-richbody p').nth(1).innerHTML();
       console.log(JSON.stringify({ palette, highlighted, highlightUndone, defaultColor, changedThemeColor, colorUndone }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_rich_docx_export.py

@@ -5,6 +5,7 @@ import subprocess
 import tempfile
 import zipfile
 from pathlib import Path
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source
 
 
@@ -65,7 +66,7 @@ def test_browser_word_export_contains_native_rich_docx_ooxml():
         contentType: 'image/png',
         body: Buffer.from('iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+A8AAQUBAScY42YAAAAASUVORK5CYII=', 'base64'),
       }}));
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {{
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&docx-export-test=1');
         mod.init('/api');
@@ -90,6 +91,7 @@ def test_browser_word_export_contains_native_rich_docx_ooxml():
       }}));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,
@@ -159,7 +161,7 @@ def test_browser_markdown_word_export_keeps_heading_and_inline_formatting():
         acceptDownloads: true,
       }});
       await page.goto(`${{process.env.ODYSSEUS_TEST_STATIC_ORIGIN}}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {{
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&markdown-docx-export-test=1');
         mod.init('/api');
@@ -181,6 +183,7 @@ def test_browser_markdown_word_export_keeps_heading_and_inline_formatting():
       console.log(JSON.stringify({{ failure: await download.failure() }}));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_rich_find_boundaries.py

@@ -3,6 +3,7 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source, function_body
 
 
@@ -24,7 +25,7 @@ def test_find_rejects_cross_block_matches_but_supports_inline_matches_and_replac
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 900, height: 700 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentOutline.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&find-boundaries-test=1');
         mod.init('/api');
@@ -72,6 +73,7 @@ def test_find_rejects_cross_block_matches_but_supports_inline_matches_and_replac
       console.log(JSON.stringify({ crossParagraph, crossBreak, crossInline, ...data }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_rich_font_color_controls.py

@@ -6,6 +6,7 @@ import subprocess
 from pathlib import Path
 
 from tests.helpers.stylesheets import app_css
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source, function_body
 
 
@@ -95,7 +96,7 @@ def test_numeric_font_size_and_custom_colors_work_on_desktop_and_mobile():
       async function exercise(viewport, suffix) {
         const page = await browser.newPage({ viewport });
         await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-        await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+        await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
         await page.evaluate(async suffix => {
           const mod = await import(`/static/js/document.js?v=20260831richtexttools91&font-color=${suffix}`);
           mod.init('/api');
@@ -191,6 +192,7 @@ def test_numeric_font_size_and_custom_colors_work_on_desktop_and_mobile():
       console.log(JSON.stringify({ desktop, mobile }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_rich_heading_enter.py

@@ -3,6 +3,7 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source, function_body
 
 
@@ -28,7 +29,7 @@ def test_mobile_heading_enter_exits_cleanly_and_is_one_step_undoable():
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 390, height: 844 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&heading-enter=1');
         mod.init('/api');
@@ -72,6 +73,7 @@ def test_mobile_heading_enter_exits_cleanly_and_is_one_step_undoable():
       console.log(JSON.stringify({ entered, undone, redone }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,
@@ -151,6 +153,7 @@ def test_heading_enter_preserves_shift_middle_and_empty_heading_semantics():
       console.log(JSON.stringify(state));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_rich_image_caption.py

@@ -5,6 +5,7 @@ import subprocess
 from pathlib import Path
 
 from tests.helpers.stylesheets import app_css
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source, function_body
 
 
@@ -33,7 +34,7 @@ def test_mobile_image_caption_survives_resize_history_and_empty_removal():
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 390, height: 844 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&image-caption=1');
         mod.init('/api');
@@ -113,6 +114,7 @@ def test_mobile_image_caption_survives_resize_history_and_empty_removal():
       console.log(JSON.stringify({ added, undone, redone, resized, removed, removalUndone, menuRect, overflow }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_rich_input_rules.py

@@ -5,6 +5,7 @@ import subprocess
 from pathlib import Path
 
 from tests.helpers.stylesheets import app_css
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source
 
 
@@ -29,7 +30,7 @@ def test_typing_markers_converts_blocks_and_preserves_following_text():
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 900, height: 700 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentOutline.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&input-rules-test=1');
         mod.init('/api');
@@ -102,6 +103,7 @@ def test_typing_markers_converts_blocks_and_preserves_following_text():
       console.log(JSON.stringify(data));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_rich_keyboard_shortcuts.py

@@ -3,6 +3,7 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import stylesheet_link_tags
 
 
 ROOT = Path(__file__).resolve().parents[1]
@@ -16,7 +17,7 @@ def test_rich_document_shortcuts_work_at_desktop_and_mobile_widths():
       async function exercise(viewport, suffix) {
         const page = await browser.newPage({ viewport });
         await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-        await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+        await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
         await page.evaluate(async suffix => {
           const mod = await import(`/static/js/document.js?v=20260831richtexttools91&keyboard-shortcuts=${suffix}`);
           mod.init('/api');
@@ -94,6 +95,7 @@ def test_rich_document_shortcuts_work_at_desktop_and_mobile_widths():
       console.log(JSON.stringify({ desktop, mobile }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_rich_selection_toolbar.py

@@ -3,12 +3,13 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source
 
-
 ROOT = Path(__file__).resolve().parents[1]
 DOC_JS = document_source()
-STYLE = (ROOT / "static/style.css").read_text(encoding="utf-8")
+STYLE = app_css()
 
 
 def test_selection_toolbar_uses_shared_formatting_path_and_preserves_range():
@@ -27,7 +28,7 @@ def test_selection_toolbar_formats_and_stays_inside_desktop_and_mobile_viewports
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 900, height: 700 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentOutline.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&selection-toolbar-test=1');
         mod.init('/api');
@@ -103,6 +104,7 @@ def test_selection_toolbar_formats_and_stays_inside_desktop_and_mobile_viewports
       console.log(JSON.stringify({ activeBold, desktopGeometry, formattedHtml, selectedAfterFormat, dismissed, mobileGeometry }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_rich_slash_menu.py

@@ -3,12 +3,13 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source
 
-
 ROOT = Path(__file__).resolve().parents[1]
 DOC_JS = document_source()
-STYLE = (ROOT / "static/style.css").read_text(encoding="utf-8")
+STYLE = app_css()
 
 
 def test_slash_menu_reuses_rich_text_actions_and_is_accessible():
@@ -42,7 +43,7 @@ def test_slash_menu_filters_converts_blocks_inserts_tables_and_fits_mobile():
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 900, height: 700 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentOutline.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&slash-menu-test=1');
         mod.init('/api');
@@ -150,6 +151,7 @@ def test_slash_menu_filters_converts_blocks_inserts_tables_and_fits_mobile():
       console.log(JSON.stringify({ filtered, heading, noHeadingQuery, tableFiltered, table, noTableQuery, mobile, homeOptions, homeLabel, escaped, slashRemains, cleanedAria }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_rich_smart_link_paste.py

@@ -3,6 +3,7 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import stylesheet_link_tags
 
 
 ROOT = Path(__file__).resolve().parents[1]
@@ -14,7 +15,7 @@ def test_rich_url_paste_links_selections_and_plain_urls_without_unsafe_autolinks
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 900, height: 700 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&smart-link-paste=1');
         mod.init('/api');
@@ -133,6 +134,7 @@ def test_rich_url_paste_links_selections_and_plain_urls_without_unsafe_autolinks
       console.log(JSON.stringify({ selectedLink, storedAfterPaste, afterUndo, afterRedoLinks, caretLink, plainResults, emailLink, crossBlock }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_rich_structure_tools.py

@@ -3,12 +3,13 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import declaration, document_source, function_body
 
-
 ROOT = Path(__file__).resolve().parents[1]
 DOC_JS = document_source()
-STYLE = (ROOT / "static/style.css").read_text(encoding="utf-8")
+STYLE = app_css()
 
 
 def test_heading_levels_and_page_break_are_exposed_everywhere():
@@ -39,7 +40,7 @@ def test_mobile_headings_page_break_history_and_persistence():
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 390, height: 844 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&structure-tools-test=1');
         window.__structureToolsDocModule = mod;
@@ -147,6 +148,7 @@ def test_mobile_headings_page_break_history_and_persistence():
       }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_rich_table_cell_alignment.py

@@ -3,6 +3,7 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source, function_body
 
 
@@ -28,7 +29,7 @@ def test_mobile_table_cell_alignment_tracks_state_and_native_history():
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 390, height: 844 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&table-cell-alignment=1');
         mod.init('/api');
@@ -119,6 +120,7 @@ def test_mobile_table_cell_alignment_tracks_state_and_native_history():
       }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_rich_table_header_preservation.py

@@ -3,6 +3,7 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source, function_body
 
 
@@ -35,7 +36,7 @@ def test_mobile_structural_edits_preserve_header_modes_and_history():
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 390, height: 844 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&table-header-preservation-test=1');
         mod.init('/api');
@@ -118,6 +119,7 @@ def test_mobile_structural_edits_preserve_header_modes_and_history():
       }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_rich_table_headers.py

@@ -3,6 +3,7 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source, function_body
 
 
@@ -37,7 +38,7 @@ def test_mobile_header_row_and_column_toggle_independently_with_undo():
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 390, height: 844 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&table-header-test=1');
         mod.init('/api');
@@ -114,6 +115,7 @@ def test_mobile_header_row_and_column_toggle_independently_with_undo():
       console.log(JSON.stringify({ initial, menuRect, columnOn, undone, redone, bothOn, rowOff, overflow }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_rich_table_merge_split.py

@@ -3,6 +3,7 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source, function_body
 
 
@@ -33,7 +34,7 @@ def test_mobile_merge_split_round_trip_preserves_headers_formatting_and_history(
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 390, height: 844 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&table-merge-split=1');
         mod.init('/api');
@@ -137,6 +138,7 @@ def test_mobile_merge_split_round_trip_preserves_headers_formatting_and_history(
       }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_rich_table_tab_history.py

@@ -3,6 +3,7 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source, function_body
 
 
@@ -30,7 +31,7 @@ def test_mobile_table_tab_navigation_row_creation_and_history():
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 390, height: 844 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&table-tab-history-test=1');
         mod.init('/api');
@@ -97,6 +98,7 @@ def test_mobile_table_tab_navigation_row_creation_and_history():
       console.log(JSON.stringify({ forward, backward, appended, undone, redone, overflow }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_rich_toolbar_menus.py

@@ -3,12 +3,13 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source
 
-
 ROOT = Path(__file__).resolve().parents[1]
 DOC_JS = document_source()
-STYLE = (ROOT / "static/style.css").read_text(encoding="utf-8")
+STYLE = app_css()
 
 
 def test_rich_toolbar_menus_expose_keyboard_and_context_state():
@@ -59,7 +60,7 @@ def test_mobile_toolbar_uses_native_momentum_and_distinct_activation_tokens():
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 390, height: 844 }, hasTouch: true });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&toggle-test=1');
         mod.init('/api');
@@ -102,6 +103,7 @@ def test_mobile_toolbar_uses_native_momentum_and_distinct_activation_tokens():
       console.log(JSON.stringify({ opened, closed, sliderOpened, sliderClosed, pickerOpened, colorClosed, before, scroll }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,
@@ -128,7 +130,7 @@ def test_mobile_toolbar_menu_preserves_selection_and_restores_focus():
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 390, height: 844 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&toolbar-menu-test=1');
         mod.init('/api');
@@ -205,6 +207,7 @@ def test_mobile_toolbar_menu_preserves_selection_and_restores_focus():
       }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,
@@ -243,7 +246,7 @@ def test_rich_toolbar_menus_track_live_formatting_values():
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 900, height: 700 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&toolbar-state-test=1');
         mod.init('/api');
@@ -323,6 +326,7 @@ def test_rich_toolbar_menus_track_live_formatting_values():
       }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_save_shortcut.py

@@ -3,6 +3,7 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source
 
 
@@ -39,7 +40,7 @@ def test_ctrl_s_saves_rich_text_immediately_once_and_updates_status():
         });
       });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&save-shortcut-test=1');
         mod.init('/api');
@@ -72,6 +73,7 @@ def test_ctrl_s_saves_rich_text_immediately_once_and_updates_status():
       console.log(JSON.stringify({ dirty, saved, badge, requests }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_save_status.py

@@ -3,6 +3,7 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import stylesheet_link_tags
 
 
 ROOT = Path(__file__).resolve().parents[1]
@@ -32,7 +33,7 @@ def test_save_status_is_dirty_race_safe_and_reports_failures():
         active -= 1;
       });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=20260831richtexttools91&save-status-test=1');
         mod.init('/api');
@@ -81,6 +82,7 @@ def test_save_status_is_dirty_race_safe_and_reports_failures():
       console.log(JSON.stringify({ initial, dirty, duringSave, afterSave, afterFailure, bodies, maxActive, footer, mobile }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_document_suggestion_highlight.py

@@ -1,12 +1,12 @@
 """Regression guards for exact inline document-suggestion highlighting."""
 
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 from tests.helpers.document_source import document_source
 
-
 ROOT = Path(__file__).resolve().parents[1]
 DOC_JS = document_source()
-STYLE_CSS = (ROOT / "static/style.css").read_text(encoding="utf-8")
+STYLE_CSS = app_css()
 
 
 def test_suggestion_highlight_measures_exact_referenced_range():

tests/test_document_toolbar_arrow_offset.py

@@ -1,4 +1,5 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 from tests.helpers.document_source import document_source
 
 
@@ -7,7 +8,7 @@ ROOT = Path(__file__).resolve().parents[1]
 
 def test_toolbar_arrows_have_real_flex_slots_outside_icon_scroller():
     script = document_source()
-    styles = (ROOT / "static/style.css").read_text()
+    styles = app_css()
 
     leading = script.index('class="md-toolbar-leading-controls"')
     left_arrow = script.index('id="md-scroll-left"')

tests/test_document_toolbar_order.py

@@ -3,6 +3,7 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import stylesheet_link_tags
 from tests.helpers.document_source import document_source
 
 
@@ -39,7 +40,7 @@ def test_rich_toolbar_rendered_order_is_stable_on_desktop_and_mobile():
       async function inspect(viewport, suffix) {
         const page = await browser.newPage({ viewport });
         await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-        await page.setContent('<link rel="stylesheet" href="/static/style.css?v=20260831richtexttools91"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+        await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
         await page.evaluate(async suffix => {
           const mod = await import(`/static/js/document.js?v=20260831richtexttools91&toolbar-order=${suffix}`);
           mod.init('/api');
@@ -80,6 +81,7 @@ def test_rich_toolbar_rendered_order_is_stable_on_desktop_and_mobile():
       console.log(JSON.stringify({ desktop, mobile }));
       await browser.close();
     """
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ["node", "--input-type=module", "-e", script],
         cwd=ROOT,

tests/test_editor_layer_thumbnail_render.py

@@ -1,4 +1,5 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
@@ -49,7 +50,7 @@ def test_group_rows_support_keyboard_selection():
 
 
 def test_keyboard_focus_is_visible_for_layer_and_group_rows():
-    styles = (ROOT / "static/style.css").read_text()
+    styles = app_css()
 
     assert ".ge-layer-item:focus-visible," in styles
     assert ".ge-layer-group-row:focus-visible" in styles

tests/test_editor_quick_edit_static.py

@@ -1,9 +1,10 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
 EDITOR = (ROOT / "static/js/galleryEditor.js").read_text(encoding="utf-8")
-STYLE = (ROOT / "static/style.css").read_text(encoding="utf-8")
+STYLE = app_css()
 
 
 def test_quick_edit_has_persistent_expanded_identity_and_labeled_input():

tests/test_editor_topbar_static.py

@@ -1,11 +1,12 @@
 from pathlib import Path
 import re
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
 TOPBAR = (ROOT / "static/js/editor/build/topbar.js").read_text(encoding="utf-8")
 OVERFLOW = (ROOT / "static/js/editor/wire-topbar-overflow.js").read_text(encoding="utf-8")
-STYLE = (ROOT / "static/style.css").read_text(encoding="utf-8")
+STYLE = app_css()
 
 
 def test_primary_editor_text_actions_use_stacked_toolbar_contract():

tests/test_email_folder_chip_static.py

@@ -1,4 +1,5 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
@@ -6,7 +7,7 @@ ROOT = Path(__file__).resolve().parents[1]
 
 def test_folder_chip_stays_with_date_and_moves_down():
     source = (ROOT / "static" / "js" / "emailLibrary.js").read_text()
-    css = (ROOT / "static" / "style.css").read_text()
+    css = app_css()
 
     assert 'class="email-meta-date-group"' in source
     group_markup = source[source.index('class="email-meta-date-group"'):][:180]

tests/test_email_split_border_css.py

@@ -1,7 +1,8 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
-CSS = (Path(__file__).parents[1] / "static" / "style.css").read_text(encoding="utf-8")
+CSS = app_css()
 
 
 def _rule(selector: str) -> str:

tests/test_endpoint_card_ui_polish.py

@@ -5,11 +5,12 @@ import shutil
 import subprocess
 from pathlib import Path
 import pytest
+from tests.helpers.stylesheets import app_css
 
 _REPO = Path(__file__).resolve().parent.parent
 _ADMIN_JS = _REPO / "static" / "js" / "admin.js"
 _ADMIN = _ADMIN_JS.read_text(encoding="utf-8")
-_STYLE = (_REPO / "static" / "style.css").read_text(encoding="utf-8")
+_STYLE = app_css()
 pytestmark = pytest.mark.skipif(not shutil.which("node"), reason="node not on PATH")
 
 

tests/test_escape_inner_layers.py

@@ -3,6 +3,7 @@
 import json
 import subprocess
 from pathlib import Path
+from tests.helpers.stylesheets import stylesheet_link_tags
 
 
 ROOT = Path(__file__).resolve().parents[1]
@@ -14,7 +15,7 @@ def test_rich_escape_closes_toolbar_then_selection_badge() -> None:
       const browser = await chromium.launch({ headless: true });
       const page = await browser.newPage({ viewport: { width: 900, height: 700 } });
       await page.goto(`${process.env.ODYSSEUS_TEST_STATIC_ORIGIN}/static/js/documentStats.js`);
-      await page.setContent('<link rel="stylesheet" href="/static/style.css"><div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
+      await page.setContent('__ODY_STYLESHEETS__<div id="toast"></div><div id="chat-container"></div><div id="sidebar"></div>');
       await page.evaluate(async () => {
         const mod = await import('/static/js/document.js?v=escape-regression-1');
         mod.init('/api');
@@ -55,6 +56,7 @@ def test_rich_escape_closes_toolbar_then_selection_badge() -> None:
       console.log(JSON.stringify({ before, afterOne, afterTwo }));
       await browser.close();
     '''
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ['node', '--input-type=module', '-e', script],
         cwd=ROOT,
@@ -114,6 +116,7 @@ def test_email_escape_closes_inner_states_without_closing_library() -> None:
       console.log(JSON.stringify({ settings, select, reading }));
       await browser.close();
     '''
+    script = script.replace("__ODY_STYLESHEETS__", stylesheet_link_tags())
     result = subprocess.run(
         ['node', '--input-type=module', '-e', script],
         cwd=ROOT,

tests/test_image_research_settings_static.py

@@ -1,4 +1,5 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
@@ -15,7 +16,7 @@ def test_image_settings_only_list_online_served_image_models():
 
 
 def test_deep_research_fields_are_constrained_to_their_card():
-    styles = (ROOT / "static/style.css").read_text(encoding="utf-8")
+    styles = app_css()
 
     rule = styles[styles.index("/* Deep Research uses long labels"):]
     assert ".admin-card:has(#set-researchSearch) .settings-row { min-width: 0; }" in rule

tests/test_inspect_media_tool.py

@@ -1,5 +1,6 @@
 import asyncio
 import base64
+import functools
 import io
 import json
 from pathlib import Path
@@ -20,6 +21,28 @@ from src.tool_execution import _active_workspace
 from src.tool_schemas import FUNCTION_TOOL_SCHEMAS
 
 
+@functools.lru_cache(maxsize=None)
+def _ffmpeg_has_encoder(name: str) -> bool:
+    """Whether the ffmpeg on PATH was built with the named encoder.
+
+    Codec support is a build option, not something the project requires. The
+    Homebrew ffmpeg on macOS ships without libwebp, for instance, so a test
+    that asserts a successful `.webp` export there fails on the build rather
+    than on the tool.
+    """
+    if not shutil.which("ffmpeg"):
+        return False
+    listed = subprocess.run(
+        ["ffmpeg", "-hide_banner", "-loglevel", "error", "-encoders"],
+        check=False, capture_output=True, text=True,
+    )
+    return any(
+        line.split()[1:2] == [name] or f"(codec {name})" in line
+        for line in listed.stdout.splitlines()
+        if line.strip()
+    )
+
+
 def test_media_timestamp_parser_accepts_units_and_four_field_timecodes():
     assert _parse_seconds("0m", default=-1) == 0
     assert _parse_seconds("30m", default=-1) == 1800
@@ -491,13 +514,16 @@ def test_inspect_media_exports_final_decodable_frame_at_exact_duration(tmp_path:
         result = asyncio.run(InspectMediaTool().execute(json.dumps({
             "path": "/workspace/video.mp4",
             "timestamp": "end",
-            "output_path": "/workspace/final.webp",
+            # PNG, not WebP: this asserts that the *final* frame is decodable at
+            # the exact duration, so it must not also depend on an optional
+            # ffmpeg encoder. WebP export is covered separately below.
+            "output_path": "/workspace/final.png",
         }), {}))
     finally:
         _active_workspace.reset(token)
 
     assert result["exit_code"] == 0, result
-    assert (tmp_path / "final.webp").stat().st_size > 0
+    assert (tmp_path / "final.png").stat().st_size > 0
 
     token = _active_workspace.set(str(tmp_path))
     try:
@@ -514,6 +540,67 @@ def test_inspect_media_exports_final_decodable_frame_at_exact_duration(tmp_path:
     assert Image.open(io.BytesIO(base64.b64decode(high_detail["images"][0]["data"]))).size == (768, 432)
 
 
+@pytest.mark.skipif(not shutil.which("ffmpeg") or not shutil.which("ffprobe"), reason="ffmpeg required")
+@pytest.mark.skipif(not _ffmpeg_has_encoder("webp"), reason="ffmpeg built without a webp encoder")
+def test_inspect_media_exports_a_webp_still(tmp_path: Path):
+    """A `.webp` output_path is passed straight through to ffmpeg.
+
+    Guarded on the encoder rather than asserted unconditionally: WebP is a
+    build option (Homebrew's macOS ffmpeg omits it) and the project does not
+    require it. When the encoder is missing the tool reports ffmpeg's failure
+    with `exit_code` 1, which is covered by
+    `test_inspect_media_reports_a_missing_encoder_instead_of_crashing`.
+    """
+    video = tmp_path / "video.mp4"
+    subprocess.run([
+        "ffmpeg", "-hide_banner", "-loglevel", "error", "-f", "lavfi",
+        "-i", "testsrc2=size=320x180:rate=4:duration=2", "-pix_fmt", "yuv420p",
+        "-y", str(video),
+    ], check=True)
+    token = _active_workspace.set(str(tmp_path))
+    try:
+        result = asyncio.run(InspectMediaTool().execute(json.dumps({
+            "path": "/workspace/video.mp4",
+            "timestamp": "end",
+            "output_path": "/workspace/final.webp",
+        }), {}))
+    finally:
+        _active_workspace.reset(token)
+
+    assert result["exit_code"] == 0, result
+    assert Image.open(tmp_path / "final.webp").format == "WEBP"
+
+
+@pytest.mark.skipif(not shutil.which("ffmpeg") or not shutil.which("ffprobe"), reason="ffmpeg required")
+@pytest.mark.skipif(_ffmpeg_has_encoder("webp"), reason="needs an ffmpeg built without webp")
+def test_inspect_media_reports_a_missing_encoder_instead_of_crashing(tmp_path: Path):
+    """An export in a format this ffmpeg cannot encode fails as a tool error.
+
+    The tool does not probe the encoder list, so the only contract it can keep
+    is to surface ffmpeg's own failure rather than raise or write a truncated
+    file. Asserted only on builds that actually lack the encoder.
+    """
+    video = tmp_path / "video.mp4"
+    subprocess.run([
+        "ffmpeg", "-hide_banner", "-loglevel", "error", "-f", "lavfi",
+        "-i", "testsrc2=size=320x180:rate=4:duration=2", "-pix_fmt", "yuv420p",
+        "-y", str(video),
+    ], check=True)
+    token = _active_workspace.set(str(tmp_path))
+    try:
+        result = asyncio.run(InspectMediaTool().execute(json.dumps({
+            "path": "/workspace/video.mp4",
+            "timestamp": "end",
+            "output_path": "/workspace/final.webp",
+        }), {}))
+    finally:
+        _active_workspace.reset(token)
+
+    assert result["exit_code"] == 1
+    assert "ffmpeg still extraction failed" in result["error"]
+    assert not (tmp_path / "final.webp").exists()
+
+
 @pytest.mark.skipif(not shutil.which("ffmpeg") or not shutil.which("ffprobe"), reason="ffmpeg required")
 def test_inspect_media_rejects_ambiguous_multi_frame_single_image_export(tmp_path: Path):
     video = tmp_path / "video.mp4"

tests/test_interrupted_resume_label_static.py

@@ -1,11 +1,12 @@
 from pathlib import Path
 import re
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
 CHAT = (ROOT / "static/js/chat.js").read_text()
 RENDERER = (ROOT / "static/js/chatRenderer.js").read_text()
-STYLE = (ROOT / "static/style.css").read_text()
+STYLE = app_css()
 APP = (ROOT / "static/app.js").read_text()
 INDEX = (ROOT / "static/index.html").read_text()
 

tests/test_mcp_add_server_args_validation.py

@@ -0,0 +1,174 @@
+"""Regression test for issue #6211: a malformed Args value on the "Add MCP
+Server" form must not be silently discarded into an empty argv.
+
+routes/mcp/mcp_routes.py's add_server() wrapped json.loads(args) in a bare
+except that fell back to `[]`, so a non-JSON Args value registered the
+server as "Connected" while forwarding no arguments to the spawned stdio
+subprocess at all, with no error surfaced anywhere.
+"""
+import asyncio
+import json
+from pathlib import Path
+from unittest.mock import AsyncMock, MagicMock
+
+import pytest
+from fastapi import HTTPException
+
+from routes.mcp import mcp_routes
+
+
+class _FakeSession:
+    """Stands in for core.database.SessionLocal(); add_server only adds+commits."""
+
+    def __init__(self):
+        self.added = []
+
+    def add(self, obj):
+        self.added.append(obj)
+
+    def commit(self):
+        pass
+
+    def close(self):
+        pass
+
+
+def _add_server(monkeypatch):
+    """Register add_server on the shared module-level router and return the
+    freshly-added route's raw endpoint function, bypassing HTTP/Form parsing
+    (require_admin is the only other thing the function touches via `request`).
+
+    Callers must pass every Form(...) parameter add_server reads past the args
+    check (url, oauth_file, oauth_config): calling the endpoint directly skips
+    FastAPI's dependency resolution, so an omitted one arrives as the Form
+    marker object itself rather than its declared default, and later code
+    (e.g. `if oauth_file:`) reads that marker as truthy.
+    """
+    monkeypatch.setattr(mcp_routes, "require_admin", lambda request: None)
+    manager = MagicMock()
+    manager.connect_server = AsyncMock(return_value=True)
+    manager.get_server_status = MagicMock(return_value={"status": "connected", "tool_count": 1})
+    router = mcp_routes.setup_mcp_routes(manager)
+    # setup_mcp_routes appends new APIRoute objects to the shared router on
+    # every call, so take the LAST "add_server" route: the one just registered
+    # with our fake manager, not an earlier registration from importing app.py.
+    route = [r for r in router.routes if getattr(r, "name", None) == "add_server"][-1]
+    return route.endpoint, manager
+
+
+def test_add_server_rejects_malformed_args_instead_of_defaulting(monkeypatch):
+    add_server, manager = _add_server(monkeypatch)
+    monkeypatch.setattr(mcp_routes, "SessionLocal", lambda: (_ for _ in ()).throw(
+        AssertionError("must not reach the DB when args is rejected")))
+
+    with pytest.raises(HTTPException) as exc:
+        asyncio.run(add_server(
+            request=None,
+            name="filesystem",
+            transport="stdio",
+            command="mcp-server-filesystem",
+            args="/app/data/jarvis-files",  # the exact value from issue #6211
+            env="{}",
+            url=None,
+            oauth_file=None,
+            oauth_config=None,
+        ))
+
+    assert exc.value.status_code == 400
+    manager.connect_server.assert_not_called()
+
+
+def test_add_server_still_accepts_valid_json_args(monkeypatch):
+    add_server, manager = _add_server(monkeypatch)
+    fake_session = _FakeSession()
+    monkeypatch.setattr(mcp_routes, "SessionLocal", lambda: fake_session)
+
+    result = asyncio.run(add_server(
+        request=None,
+        name="filesystem",
+        transport="stdio",
+        command="mcp-server-filesystem",
+        args=json.dumps(["/app/data/jarvis-files"]),
+        env="{}",
+        url=None,
+        oauth_file=None,
+        oauth_config=None,
+    ))
+
+    assert result["connected"] is True
+    manager.connect_server.assert_awaited_once()
+    assert manager.connect_server.call_args.kwargs["args"] == ["/app/data/jarvis-files"]
+    assert fake_session.added[0].args == json.dumps(["/app/data/jarvis-files"])
+
+
+def test_add_server_rejects_valid_json_args_that_is_not_a_list(monkeypatch):
+    """Valid JSON that is not a list (e.g. args=5) must not reach
+    StdioServerParameters(args=5), which raises an unhandled TypeError when
+    the error formatter later does " ".join([command, *args])."""
+    add_server, manager = _add_server(monkeypatch)
+    monkeypatch.setattr(mcp_routes, "SessionLocal", lambda: (_ for _ in ()).throw(
+        AssertionError("must not reach the DB when args has the wrong shape")))
+
+    with pytest.raises(HTTPException) as exc:
+        asyncio.run(add_server(
+            request=None,
+            name="filesystem",
+            transport="stdio",
+            command="mcp-server-filesystem",
+            args="5",
+            env="{}",
+            url=None,
+            oauth_file=None,
+            oauth_config=None,
+        ))
+
+    assert exc.value.status_code == 400
+    manager.connect_server.assert_not_called()
+
+
+def test_add_server_still_defaults_empty_args_to_empty_list(monkeypatch):
+    """No behavior change for the common case of an empty Args field."""
+    add_server, manager = _add_server(monkeypatch)
+    fake_session = _FakeSession()
+    monkeypatch.setattr(mcp_routes, "SessionLocal", lambda: fake_session)
+
+    result = asyncio.run(add_server(
+        request=None,
+        name="no-args-server",
+        transport="stdio",
+        command="some-command",
+        args="",
+        env="{}",
+        url=None,
+        oauth_file=None,
+        oauth_config=None,
+    ))
+
+    assert result["connected"] is True
+    assert manager.connect_server.call_args.kwargs["args"] == []
+
+
+# ---------------------------------------------------------------------------
+# The two forms that post to this endpoint
+# ---------------------------------------------------------------------------
+#
+# The route now answers 400 with a message naming the expected shape. That is
+# only worth anything if the form the user is looking at prints it, and the two
+# forms did not agree: admin.js reads `data.detail`, settings.js printed the
+# bare status code. Read as source, because the artifact under test is the
+# string in the file and neither form is reachable without a browser.
+
+_REPO = Path(__file__).resolve().parents[1]
+
+
+def test_admin_form_reports_the_reason_the_route_gave():
+    source = (_REPO / "static" / "js" / "admin.js").read_text(encoding="utf-8")
+    assert "msg.textContent = data.detail || `Failed (${res.status})`;" in source
+
+
+def test_unified_integrations_form_reports_the_reason_the_route_gave():
+    source = (_REPO / "static" / "js" / "settings.js").read_text(encoding="utf-8")
+    assert (
+        "el('uf-mcp-msg').textContent = data.detail || `Failed (${r.status})`;"
+        in source
+    ), "settings.js drops the route's message and prints only the status code"

tests/test_mobile_search_position_static.py

@@ -1,4 +1,5 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
@@ -6,7 +7,7 @@ ROOT = Path(__file__).resolve().parents[1]
 
 def test_search_popup_freezes_offset_before_mobile_keyboard_focus() -> None:
     source = (ROOT / "static/js/search-chat.js").read_text(encoding="utf-8")
-    css = (ROOT / "static/style.css").read_text(encoding="utf-8")
+    css = app_css()
 
     set_offset = source.index("--search-overlay-top")
     show_overlay = source.index("overlay.classList.remove('hidden')", set_offset)

tests/test_mobile_welcome_keyboard_static.py

@@ -1,11 +1,12 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
 
 
 def test_mobile_keyboard_fades_welcome_without_moving_it() -> None:
-    css = (ROOT / "static/style.css").read_text(encoding="utf-8")
+    css = app_css()
     init_js = (ROOT / "static/js/init.js").read_text(encoding="utf-8")
 
     kb_rule = css.split("#welcome-screen.kb-hidden {", 1)[1].split("}", 1)[0]
@@ -22,7 +23,7 @@ def test_mobile_keyboard_fades_welcome_without_moving_it() -> None:
 
 
 def test_nobody_label_collapses_by_width_not_keyboard_height() -> None:
-    css = (ROOT / "static/style.css").read_text(encoding="utf-8")
+    css = app_css()
     label_rule = css.rsplit(".incognito-btn .incognito-label {", 1)[0]
     media_header = label_rule.rsplit("@media", 1)[1].split("{", 1)[0]
 

tests/test_modal_dock_composer_clearance.py

@@ -1,7 +1,8 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
-CSS = Path("static/style.css").read_text(encoding="utf-8")
+CSS = app_css()
 INIT_JS = Path("static/js/init.js").read_text(encoding="utf-8")
 
 

tests/test_notes_sidebar_new_note.py

@@ -1,4 +1,5 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
@@ -6,7 +7,7 @@ ROOT = Path(__file__).resolve().parents[1]
 
 def test_notes_sidebar_new_action_matches_library_structure_and_animation():
     html = (ROOT / "static/index.html").read_text(encoding="utf-8")
-    css = (ROOT / "static/style.css").read_text(encoding="utf-8")
+    css = app_css()
 
     assert 'class="list-item-plus-btn sidebar-new-item-btn" id="notes-new-note-btn"' in html
     assert '<span class="list-item-plus-label">new</span>' in html[html.index('id="notes-new-note-btn"'):]
@@ -51,7 +52,7 @@ def test_checklist_preview_starts_at_first_unfinished_item():
 
 def test_checklist_preview_releases_scroll_at_its_boundaries():
     notes = (ROOT / "static/js/notes.js").read_text(encoding="utf-8")
-    css = (ROOT / "static/style.css").read_text(encoding="utf-8")
+    css = app_css()
 
     assert "el.addEventListener('wheel'" in notes
     assert "el.closest('.notes-pane-body')" in notes
@@ -60,7 +61,7 @@ def test_checklist_preview_releases_scroll_at_its_boundaries():
 
 
 def test_notes_tags_toggle_is_nudged_down():
-    css = (ROOT / "static/style.css").read_text(encoding="utf-8")
+    css = app_css()
     rule = css[css.index(".notes-search-bar .notes-label-toggle {"):]
     rule = rule[:rule.index("}")]
 
@@ -68,7 +69,7 @@ def test_notes_tags_toggle_is_nudged_down():
 
 
 def test_notes_body_and_tag_arrow_are_nudged_down():
-    css = (ROOT / "static/style.css").read_text(encoding="utf-8")
+    css = app_css()
 
     assert css.count("padding: 10px 8px 8px") >= 2
     assert ".notes-pane-body .doclib-chip-scroll-arrow.right" in css
@@ -76,7 +77,7 @@ def test_notes_body_and_tag_arrow_are_nudged_down():
 
 
 def test_notes_tag_strip_cannot_grow_into_blank_space():
-    css = (ROOT / "static/style.css").read_text(encoding="utf-8")
+    css = app_css()
     rule = css[css.index(".notes-pane-body > .doclib-chip-scroll-frame:has(> .notes-labels-bar) {"):]
     rule = rule[:rule.index("}")]
 

tests/test_portal_dropdown_z_js.py

@@ -16,6 +16,7 @@ import textwrap
 from pathlib import Path
 
 import pytest
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
@@ -100,9 +101,11 @@ def test_late_routed_dropdowns_use_top_portal_z(rel):
     assert "topPortalZ()" in src, f"{rel} must call topPortalZ() for its dropdown z"
 
 
-@pytest.mark.parametrize("rel", ["static/js/tasks.js", "static/js/skills.js", "static/style.css"])
+@pytest.mark.parametrize("rel", ["static/js/tasks.js", "static/js/skills.js", "app-css"])
 def test_no_hardcoded_portal_z_literals_remain(rel):
-    src = (ROOT / rel).read_text()
+    # "app-css" is the whole cascade: a moved rule must not escape this check
+    # by landing in a stylesheet this list does not name.
+    src = app_css() if rel == "app-css" else (ROOT / rel).read_text()
     # Match the exact 100000/100002 these dropdowns used; the trailing-digit
     # guard avoids false-matching an unrelated 1000000 elsewhere.
     hits = re.findall(r"z-index:\s*10000[02](?!\d)", src)

tests/test_procfs_scan_guard.py

@@ -0,0 +1,178 @@
+"""Every procfs pid scan in the app tree must be guarded by an existence check.
+
+This is the third instance of the same defect: code walks ``/proc`` on a host
+that has no procfs, and the resulting ``FileNotFoundError`` breaks a path that
+had otherwise succeeded. Two of the three were found by reading source, so
+this pins the class rather than the instances.
+
+Deliberate AST assertion under the narrow exception in
+``tests/TESTING_STANDARD.md``: the invariant is "no *other* module grows an
+unguarded scan", which cannot be driven at runtime without importing and
+exercising every procfs-touching code path on both a Linux and a non-Linux
+host. ``test_cookbook_stop_without_procfs.py`` covers the behaviour itself.
+"""
+import ast
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parent.parent
+
+# Trees that ship as the application. Tests and vendored code are excluded.
+APP_TREES = (
+    "app.py",
+    "core",
+    "routes",
+    "src",
+    "services",
+    "scripts",
+    "mcp_servers",
+    "integrations",
+    "companion",
+)
+
+# Calls that enumerate a directory's entries. Reading one known file under
+# /proc is a different shape — it fails per-file and callers already handle
+# that — so only the enumerating calls are in scope here.
+_SCAN_FUNCS = {"listdir", "scandir"}
+_SCAN_METHODS = {"iterdir", "glob", "rglob"}
+
+# Calls that prove the scan is conditional on procfs being present.
+_GUARD_FUNCS = {"has_procfs", "isdir", "is_dir", "exists"}
+
+PROCFS_ROOT = "/proc"
+
+
+def _is_procfs_root(node: ast.AST) -> bool:
+    """True if ``node`` evaluates to the procfs root directory."""
+    if isinstance(node, ast.Constant) and node.value == PROCFS_ROOT:
+        return True
+    # Path("/proc")
+    if isinstance(node, ast.Call):
+        return any(_is_procfs_root(arg) for arg in node.args)
+    # PROC_ROOT / _PROC_ROOT / proc_root / platform_compat.PROC_ROOT
+    name = None
+    if isinstance(node, ast.Name):
+        name = node.id
+    elif isinstance(node, ast.Attribute):
+        name = node.attr
+    return bool(name) and name.lower().lstrip("_") == "proc_root"
+
+
+def _scan_sites(tree: ast.AST) -> list[ast.Call]:
+    sites = []
+    for node in ast.walk(tree):
+        if not isinstance(node, ast.Call):
+            continue
+        func = node.func
+        if isinstance(func, ast.Attribute) and func.attr in _SCAN_FUNCS:
+            if node.args and _is_procfs_root(node.args[0]):
+                sites.append(node)
+        elif isinstance(func, ast.Name) and func.id in _SCAN_FUNCS:
+            if node.args and _is_procfs_root(node.args[0]):
+                sites.append(node)
+        elif isinstance(func, ast.Attribute) and func.attr in _SCAN_METHODS:
+            if _is_procfs_root(func.value):
+                sites.append(node)
+    return sites
+
+
+def _guard_lines(tree: ast.AST) -> list[int]:
+    """Line numbers of calls that test whether procfs is present."""
+    lines = []
+    for node in ast.walk(tree):
+        if not isinstance(node, ast.Call):
+            continue
+        func = node.func
+        name = func.attr if isinstance(func, ast.Attribute) else getattr(func, "id", "")
+        if name not in _GUARD_FUNCS:
+            continue
+        subject_is_procfs = (
+            name in {"has_procfs", "is_wsl"}
+            or (isinstance(func, ast.Attribute) and _is_procfs_root(func.value))
+            or any(_is_procfs_root(arg) for arg in node.args)
+        )
+        if subject_is_procfs:
+            lines.append(node.lineno)
+    return lines
+
+
+def _enclosing_scope(tree: ast.AST, node: ast.AST) -> ast.AST:
+    """Smallest function/module scope containing ``node``."""
+    best = tree
+    for candidate in ast.walk(tree):
+        if not isinstance(candidate, (ast.FunctionDef, ast.AsyncFunctionDef)):
+            continue
+        end = getattr(candidate, "end_lineno", None) or candidate.lineno
+        if candidate.lineno <= node.lineno <= end:
+            if best is tree or candidate.lineno > best.lineno:
+                best = candidate
+    return best
+
+
+def _app_python_files() -> list[Path]:
+    files = []
+    for entry in APP_TREES:
+        target = REPO_ROOT / entry
+        if target.is_file():
+            files.append(target)
+        elif target.is_dir():
+            files.extend(
+                p for p in target.rglob("*.py") if "__pycache__" not in p.parts
+            )
+    return sorted(files)
+
+
+def _collect_sites() -> tuple[list[str], list[str]]:
+    """Return (guarded, unguarded) ``path:line`` labels for procfs scans."""
+    guarded, unguarded = [], []
+    for path in _app_python_files():
+        try:
+            source = path.read_text(encoding="utf-8")
+        except UnicodeDecodeError:
+            continue
+        # Cheap pre-filter: a scan has to name the root somehow.
+        if PROCFS_ROOT not in source and "proc_root" not in source.lower():
+            continue
+        try:
+            tree = ast.parse(source)
+        except SyntaxError:
+            continue
+        sites = _scan_sites(tree)
+        if not sites:
+            continue
+        guards = _guard_lines(tree)
+        for site in sites:
+            scope = _enclosing_scope(tree, site)
+            start = getattr(scope, "lineno", 0)
+            label = f"{path.relative_to(REPO_ROOT)}:{site.lineno}"
+            if any(start <= g < site.lineno for g in guards):
+                guarded.append(label)
+            else:
+                unguarded.append(label)
+    return guarded, unguarded
+
+
+def test_every_procfs_scan_is_guarded_by_an_existence_check():
+    _guarded, unguarded = _collect_sites()
+    assert not unguarded, (
+        "procfs pid scans with no existence check in the enclosing function — "
+        "these raise FileNotFoundError on macOS and Windows: "
+        + ", ".join(unguarded)
+    )
+
+
+def test_the_guard_detector_still_sees_the_known_scans():
+    """A rename must not silently turn the assertion above into a no-op.
+
+    Lower bound, not an exact count: a new *guarded* scan is fine and should
+    not fail this. What must not happen is the detector going blind, which
+    shows up as sites disappearing.
+    """
+    guarded, unguarded = _collect_sites()
+    found = set(guarded) | set(unguarded)
+    files = {label.rsplit(":", 1)[0] for label in found}
+    known = {"src/agent_tools/web_tools.py", "src/tools/cookbook.py"}
+    assert known <= files, (
+        "the detector no longer sees a known procfs scan — check whether the "
+        f"root was renamed. Found: {sorted(found)}"
+    )
+    assert len(found) >= 3, f"expected at least 3 procfs scans, found {sorted(found)}"

tests/test_research_panel_ui.py

@@ -1,4 +1,5 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
@@ -6,7 +7,7 @@ ROOT = Path(__file__).resolve().parents[1]
 
 def test_research_settings_use_custom_pickers_and_shared_provider_icons():
     panel = (ROOT / "static/js/research/panel.js").read_text(encoding="utf-8")
-    style = (ROOT / "static/style.css").read_text(encoding="utf-8")
+    style = app_css()
     settings = (ROOT / "static/js/settings.js").read_text(encoding="utf-8")
     icons = (ROOT / "static/js/searchProviderIcons.js").read_text(encoding="utf-8")
 

tests/test_resend_message_nondestructive.py

@@ -9,6 +9,7 @@ from pathlib import Path
 from types import SimpleNamespace
 
 from routes.history.history_routes import _keep_count_before_message
+from tests.helpers.stylesheets import app_css
 
 
 _REPO = Path(__file__).resolve().parent.parent
@@ -76,7 +77,7 @@ def test_footer_resend_uses_default_replacement_behavior():
 
 def test_footer_resend_uses_round_svg_icon_not_text_glyph():
     renderer = _CHAT_RENDERER_JS.read_text(encoding="utf-8")
-    style = (_REPO / "static" / "style.css").read_text(encoding="utf-8")
+    style = app_css()
 
     assert "const RESEND_ICON =" in renderer
     assert "resend-message-icon" in renderer

tests/test_scheduler_restart_doublefire.py

@@ -21,12 +21,21 @@ def _test_utcnow():
     return datetime.now(timezone.utc).replace(tzinfo=None)
 
 
-def _stub_heavy():
+def _stub_heavy(monkeypatch):
+    """Stub the heavy modules ``task_scheduler`` imports, for this test only.
+
+    Registered through ``monkeypatch.setitem`` so every entry is removed at
+    teardown. A bare ``sys.modules[name] = ...`` leaves an empty module behind
+    for the rest of the session, and any later test that imports the real one
+    silently gets the stub instead - a failure that only shows up under a
+    different collection order.
+    """
     for name in [
         "src.builtin_actions", "src.ai_interaction", "src.endpoint_resolver",
         "src.agent_loop", "src.session_manager",
     ]:
-        sys.modules.setdefault(name, types.ModuleType(name))
+        if name not in sys.modules:
+            monkeypatch.setitem(sys.modules, name, types.ModuleType(name))
 
 
 def _setup_isolated_db():
@@ -74,7 +83,7 @@ def test_scheduler_utcnow_preserves_naive_utc_contract():
 
 def _drive_scheduler(monkeypatch, pre_start_setup=None):
     """Build a TaskScheduler bypassing __init__ and run start() + two polls."""
-    _stub_heavy()
+    _stub_heavy(monkeypatch)
     cd, ScheduledTask, TaskRun = _setup_isolated_db()
 
     from src.task_scheduler import TaskScheduler

tests/test_select_dropdown_theme_css.py

@@ -1,11 +1,10 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
-STYLE_CSS = Path(__file__).resolve().parents[1] / "static" / "style.css"
-
-
+STYLE_CSS_TEXT = app_css()
 def _style_text() -> str:
-    return STYLE_CSS.read_text(encoding="utf-8")
+    return STYLE_CSS_TEXT
 
 
 def test_native_select_options_use_theme_tokens():

tests/test_selection_overlay_clear_static.py

@@ -1,4 +1,5 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 from tests.helpers.document_source import document_source
 
 
@@ -7,7 +8,7 @@ ROOT = Path(__file__).resolve().parents[1]
 
 def test_selection_overlays_have_individual_clear_controls():
     js = document_source()
-    css = (ROOT / "static/style.css").read_text(encoding="utf-8")
+    css = app_css()
 
     assert "function clearSelectionAt(index)" in js
     assert "className = 'doc-selection-overlay-clear'" in js

tests/test_settings_shell_js_behavior.py

@@ -14,6 +14,7 @@ import subprocess
 from pathlib import Path
 
 import pytest
+from tests.helpers.stylesheets import app_css
 
 
 _REPO = Path(__file__).resolve().parent.parent
@@ -22,11 +23,9 @@ _COORDINATOR_HELPER = (
     _REPO / "tests" / "helpers" / "test_settings_shell_coordinator.mjs"
 )
 _HAS_NODE = shutil.which("node") is not None
-_STYLE = _REPO / "static" / "style.css"
-
-
+_STYLE_TEXT = app_css()
 def test_settings_desktop_width_targets_settings_not_cookbook():
-    source = _STYLE.read_text(encoding="utf-8")
+    source = _STYLE_TEXT
 
     settings_rule = re.search(
         r"(?ms)^\.settings-modal-content\s*\{[^}]*"

tests/test_shared_tag_strips_static.py

@@ -1,8 +1,9 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
-STYLE = (ROOT / "static/style.css").read_text(encoding="utf-8")
+STYLE = app_css()
 INDEX = (ROOT / "static/index.html").read_text(encoding="utf-8")
 CHIP_SCROLL = (ROOT / "static/js/chipScroll.js").read_text(encoding="utf-8")
 

tests/test_shell_routes.py

@@ -5,7 +5,6 @@ import importlib
 import importlib.util
 import json
 import os
-import socket
 import sys
 from pathlib import Path
 from types import SimpleNamespace
@@ -28,6 +27,7 @@ from routes.shell_routes import (
     _venv_activate_prefix,
     DOCKER_IN_CONTAINER_HINT,
 )
+from tests.helpers.unix_sockets import bound_unix_socket
 
 
 def test_shell_routes_import_without_posix_pty_modules(monkeypatch):
@@ -294,30 +294,25 @@ class TestHostDockerAccess:
     def test_socket_without_explicit_opt_in_is_disabled(
         self,
         monkeypatch,
-        tmp_path,
         flag,
     ):
-        socket_path = tmp_path / "docker.sock"
-        with socket.socket(socket.AF_UNIX) as unix_socket:
-            unix_socket.bind(str(socket_path))
+        # Not tmp_path: binding under $TMPDIR overruns sun_path on macOS.
+        with bound_unix_socket() as socket_path:
             if flag is None:
                 monkeypatch.delenv("ODYSSEUS_ENABLE_HOST_DOCKER", raising=False)
             else:
                 monkeypatch.setenv("ODYSSEUS_ENABLE_HOST_DOCKER", flag)
 
-            assert _host_docker_access_enabled(str(socket_path)) is False
+            assert _host_docker_access_enabled(socket_path) is False
 
     def test_explicit_opt_in_with_unix_socket_is_enabled(
         self,
         monkeypatch,
-        tmp_path,
     ):
-        socket_path = tmp_path / "docker.sock"
-        with socket.socket(socket.AF_UNIX) as unix_socket:
-            unix_socket.bind(str(socket_path))
+        with bound_unix_socket() as socket_path:
             monkeypatch.setenv("ODYSSEUS_ENABLE_HOST_DOCKER", "true")
 
-            assert _host_docker_access_enabled(str(socket_path)) is True
+            assert _host_docker_access_enabled(socket_path) is True
 
 
 class TestPackageProbeStatus:

tests/test_sidebar_chat_list_sizing_static.py

@@ -1,11 +1,12 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parent.parent
 
 
 def test_sidebar_chat_list_uses_content_height_when_collapsed():
-    css = (ROOT / "static/style.css").read_text(encoding="utf-8")
+    css = app_css()
     desktop = css.split("#sessions-section #session-list {", 1)[1].split("}", 1)[0]
     mobile = css.split("#sessions-section #session-list {", 2)[2].split("}", 1)[0]
 

tests/test_skill_deeplink_static.py

@@ -1,5 +1,6 @@
 from pathlib import Path
 import re
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
@@ -102,7 +103,7 @@ def test_markdown_flattens_legacy_notes_more_details():
 
 def test_markdown_expands_note_and_skill_more_links_without_details():
     markdown_src = (ROOT / "static/js/markdown.js").read_text()
-    style_src = (ROOT / "static/style.css").read_text()
+    style_src = app_css()
 
     assert "function extractMoreListPayloads" in markdown_src
     assert "ody-more-(notes|skills|memories|events|sessions)" in markdown_src
@@ -119,7 +120,7 @@ def test_markdown_expands_note_and_skill_more_links_without_details():
 
 def test_terminal_skill_listing_uses_clickable_bounded_formatter():
     agent_src = (ROOT / "src/agent_loop.py").read_text()
-    style_src = (ROOT / "static/style.css").read_text()
+    style_src = app_css()
 
     assert "_qwen_skills_terminal_summary = _skills_list_summary_from_tool_output(" in agent_src
     assert '.msg-ai .body a[href^="#skill-"]' in style_src
@@ -127,7 +128,7 @@ def test_terminal_skill_listing_uses_clickable_bounded_formatter():
 
 
 def test_list_links_share_compact_typography():
-    style_src = (ROOT / "static/style.css").read_text()
+    style_src = app_css()
 
     assert 'a.chat-link[href^="#events-more-"]' in style_src
     assert "font-size: 11px;" in style_src
@@ -145,7 +146,7 @@ def test_open_skills_also_persists_skill_list():
 
 def test_memory_deeplink_scrolls_and_flashes_even_when_filtered():
     memory_src = (ROOT / "static/js/memory.js").read_text()
-    style_src = (ROOT / "static/style.css").read_text()
+    style_src = app_css()
 
     assert "function _resetMemoryDeepLinkFilters()" in memory_src
     assert "activeCategory = 'all';" in memory_src
@@ -158,7 +159,7 @@ def test_memory_deeplink_scrolls_and_flashes_even_when_filtered():
 
 
 def test_skill_and_memory_links_use_polished_chat_link_style():
-    style_src = (ROOT / "static/style.css").read_text()
+    style_src = app_css()
 
     assert '.msg-ai .body a[href^="#skill-"]' in style_src
     assert '.msg-ai .body a[href^="#memory-"]' in style_src

tests/test_stream_completion_scroll_stability.py

@@ -1,11 +1,12 @@
 from pathlib import Path
 import re
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
 CHAT = (ROOT / "static/js/chat.js").read_text(encoding="utf-8")
 UI = (ROOT / "static/js/ui.js").read_text(encoding="utf-8")
-STYLE = (ROOT / "static/style.css").read_text(encoding="utf-8")
+STYLE = app_css()
 
 
 def test_terminal_and_canonical_renders_preserve_chat_scroll_anchor():

tests/test_stylesheet_keyframe_uniqueness.py

@@ -0,0 +1,52 @@
+"""No two @keyframes may share a name across the app's stylesheets.
+
+Duplicate names resolve last-wins across the whole cascade, so an earlier
+definition is dead code that still looks live at its call site. Two of them
+existed and differed from the definition that actually won, which also blocked
+moving either animation during the stylesheet decomposition: relocating one
+changes which is last and therefore changes rendered behaviour.
+"""
+
+import collections
+import re
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+STATIC = ROOT / "static"
+
+
+def _stylesheets() -> list[Path]:
+    """App-owned stylesheets, in no particular order. Vendored CSS is excluded."""
+    sheets = [STATIC / "style.css"]
+    sheets.extend(sorted((STATIC / "css").glob("*.css")))
+    return [s for s in sheets if s.exists()]
+
+
+def _keyframe_names(text: str) -> list[str]:
+    without_comments = re.sub(r"/\*.*?\*/", "", text, flags=re.S)
+    return re.findall(
+        r"@(?:-webkit-)?keyframes\s+([A-Za-z0-9_-]+)\s*\{", without_comments
+    )
+
+
+def test_app_stylesheets_exist() -> None:
+    """Guard the guard: a rename must not turn this file into a no-op."""
+    assert _stylesheets(), "no app stylesheets found to check"
+
+
+def test_no_keyframes_name_is_declared_twice() -> None:
+    counts: collections.Counter[str] = collections.Counter()
+    where: dict[str, list[str]] = collections.defaultdict(list)
+
+    for sheet in _stylesheets():
+        for name in _keyframe_names(sheet.read_text(encoding="utf-8")):
+            counts[name] += 1
+            where[name].append(sheet.relative_to(ROOT).as_posix())
+
+    duplicates = {name: where[name] for name, n in counts.items() if n > 1}
+
+    assert duplicates == {}, (
+        "duplicate @keyframes names resolve last-wins, so every definition but "
+        f"the last is dead: {duplicates}"
+    )

tests/test_stylesheet_test_hygiene.py

@@ -0,0 +1,54 @@
+"""Tests must reason about the whole cascade, not one file of it.
+
+``static/style.css`` is being decomposed. A test that reads that file alone,
+or builds a synthetic page linking only that file, silently loses every rule
+that has moved: it keeps passing while covering less. Both mistakes existed
+and are cheap to detect, so this fails on either.
+"""
+
+import re
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+SELF = Path(__file__).name
+
+# The helper module and the manifest/snapshot tests are about the stylesheet
+# set itself, so naming the file is the point rather than a mistake.
+ALLOWED = {SELF, "test_static_stylesheet_manifest.py", "test_css_computed_style_snapshot.py"}
+
+_DIRECT_READ = re.compile(r'["\']static/style\.css["\']|"static"\s*/\s*"style\.css"')
+_LONE_LINK = re.compile(r'<link[^>]*href="/static/style\.css')
+
+
+def _test_sources():
+    return [p for p in sorted((ROOT / "tests").glob("*.py")) if p.name not in ALLOWED]
+
+
+def test_sources_are_discoverable() -> None:
+    """Guard the guard: a layout change must not make this vacuous."""
+    assert len(_test_sources()) > 100
+
+
+def test_no_test_reads_style_css_as_the_whole_cascade() -> None:
+    offenders = [
+        p.name for p in _test_sources()
+        if _DIRECT_READ.search(p.read_text(encoding="utf-8"))
+    ]
+
+    assert offenders == [], (
+        "read the cascade with tests.helpers.stylesheets.app_css() instead of "
+        f"static/style.css alone: {offenders}"
+    )
+
+
+def test_no_synthetic_page_links_style_css_alone() -> None:
+    offenders = [
+        p.name for p in _test_sources()
+        if _LONE_LINK.search(p.read_text(encoding="utf-8"))
+    ]
+
+    assert offenders == [], (
+        "build synthetic pages with tests.helpers.stylesheets.stylesheet_link_tags() "
+        f"so they get every stylesheet index.html loads: {offenders}"
+    )

tests/test_tailscale_discovery_cache.py

@@ -0,0 +1,69 @@
+"""A successful Tailscale query with no eligible hosts is still cached knowledge.
+
+`discover_tailscale_hosts` gated its cache on the host list being non-empty, so a
+valid "nothing to see here" answer looked identical to a cold cache and every
+caller paid for another `tailscale status --json` (up to a 5s timeout). Failures
+stay uncached so a peer coming online is still picked up promptly.
+"""
+
+import pytest
+
+from src import model_discovery
+
+
+class _Result:
+    def __init__(self, returncode, stdout):
+        self.returncode = returncode
+        self.stdout = stdout
+
+
+@pytest.fixture
+def tailscale(monkeypatch):
+    """Count `tailscale status` invocations and start from a cold cache."""
+    calls = []
+
+    def _record(result):
+        def _run(*_args, **_kwargs):
+            calls.append(1)
+            if isinstance(result, Exception):
+                raise result
+            return result
+        monkeypatch.setattr(model_discovery.subprocess, "run", _run)
+        return calls
+
+    monkeypatch.setattr(model_discovery, "_hosts_cache", [])
+    monkeypatch.setattr(model_discovery, "_hosts_cache_time", 0)
+    return _record
+
+
+def test_empty_but_successful_discovery_is_only_run_once(tailscale):
+    calls = tailscale(_Result(0, '{"Self":{},"Peer":{}}'))
+
+    assert model_discovery.discover_tailscale_hosts() == []
+    assert model_discovery.discover_tailscale_hosts() == []
+    assert len(calls) == 1
+
+
+def test_nonempty_discovery_is_still_cached(tailscale):
+    calls = tailscale(_Result(0, '{"Self":{"TailscaleIPs":["100.1.1.1"]},"Peer":{}}'))
+
+    assert model_discovery.discover_tailscale_hosts() == ["100.1.1.1"]
+    assert model_discovery.discover_tailscale_hosts() == ["100.1.1.1"]
+    assert len(calls) == 1
+
+
+@pytest.mark.parametrize(
+    "result",
+    [
+        _Result(1, ""),                       # tailscale installed but logged out
+        _Result(0, "not json"),               # unparseable output
+        FileNotFoundError("tailscale"),       # not installed
+    ],
+    ids=["nonzero_exit", "bad_json", "not_installed"],
+)
+def test_failures_stay_retryable(tailscale, result):
+    calls = tailscale(result)
+
+    assert model_discovery.discover_tailscale_hosts() == []
+    assert model_discovery.discover_tailscale_hosts() == []
+    assert len(calls) == 2

tests/test_theme_sidebar_mobile.py

@@ -1,11 +1,10 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
-STYLE = Path(__file__).resolve().parents[1] / "static" / "style.css"
-
-
+STYLE_TEXT = app_css()
 def test_mobile_sidebar_uses_the_sidebar_theme_surface():
-    css = STYLE.read_text()
+    css = STYLE_TEXT
     mobile_drawer = css[css.index("/* Sidebar overlays chat on mobile */"):css.index("/* Backdrop behind sidebar */")]
     assert "background: var(--sidebar-bg, var(--panel)) !important;" in mobile_drawer
     assert "background: var(--panel) !important;" not in mobile_drawer

tests/test_toast_ui_polish.py

@@ -1,6 +1,7 @@
 """Regression coverage for transient toast polish and accurate welcome tips."""
 
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parent.parent
@@ -9,7 +10,7 @@ ROOT = Path(__file__).resolve().parent.parent
 def test_notification_history_does_not_clutter_navigation_or_capture_toasts():
     html = (ROOT / "static/index.html").read_text(encoding="utf-8")
     ui = (ROOT / "static/js/ui.js").read_text(encoding="utf-8")
-    css = (ROOT / "static/style.css").read_text(encoding="utf-8")
+    css = app_css()
 
     assert 'id="rail-notifications"' not in html
     assert 'id="sidebar-notifications-btn"' not in html
@@ -32,7 +33,7 @@ def test_action_hint_is_part_of_action_button_and_close_is_grouped_beside_it():
 
 def test_welcome_tips_are_plain_and_brief():
     html = (ROOT / "static/index.html").read_text(encoding="utf-8")
-    css = (ROOT / "static/style.css").read_text(encoding="utf-8")
+    css = app_css()
 
     assert "Tip: Ctrl+K searches chats." in html
     assert "Tip: Ctrl+Alt+B toggles the sidebar." in html

tests/test_tool_approval_frontend_routing.py

@@ -1,5 +1,6 @@
 from pathlib import Path
 import re
+from tests.helpers.stylesheets import app_css
 
 
 def test_tool_approval_bypasses_polymorphic_send_button_actions():
@@ -22,7 +23,7 @@ def test_tool_approval_bypasses_polymorphic_send_button_actions():
 def test_ask_user_card_has_no_close_button_and_chat_scale_text():
     root = Path(__file__).resolve().parents[1]
     renderer = (root / "static/js/chatRenderer.js").read_text(encoding="utf-8")
-    styles = (root / "static/style.css").read_text(encoding="utf-8")
+    styles = app_css()
 
     assert "closeBtn.className = 'modal-close ask-user-close';" not in renderer
     assert "closeBtn.setAttribute('aria-label', 'Dismiss question');" not in renderer
@@ -64,7 +65,7 @@ def test_ask_user_card_has_no_close_button_and_chat_scale_text():
 def test_scroll_bottom_button_uses_dropdown_caret_glyph():
     root = Path(__file__).resolve().parents[1]
     html = (root / "static/index.html").read_text(encoding="utf-8")
-    styles = (root / "static/style.css").read_text(encoding="utf-8")
+    styles = app_css()
 
     assert 'class="scroll-nav-caret"' in html
     assert "▾" in html

tests/test_tool_header_icons_static.py

@@ -1,4 +1,5 @@
 from pathlib import Path
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
@@ -7,7 +8,7 @@ ROOT = Path(__file__).resolve().parents[1]
 def test_tool_header_has_semantic_icons_for_live_and_saved_calls():
     chat = (ROOT / "static/js/chat.js").read_text(encoding="utf-8")
     renderer = (ROOT / "static/js/chatRenderer.js").read_text(encoding="utf-8")
-    css = (ROOT / "static/style.css").read_text(encoding="utf-8")
+    css = app_css()
 
     assert "manage_calendar" in renderer
     assert "manage_memory" in renderer

tests/test_visual_research_mode.py

@@ -5,6 +5,7 @@ import pytest
 from src.deep_research import CATEGORY_PROMPTS, _infer_research_category
 from src.tool_schemas import FUNCTION_TOOL_SCHEMAS
 from src.visual_report import _standard_visual_variant
+from tests.helpers.stylesheets import app_css
 
 
 ROOT = Path(__file__).resolve().parents[1]
@@ -20,7 +21,7 @@ def _tool_schema(name: str) -> dict:
 
 def test_visual_research_mode_is_removed_from_ui_prompt_and_tool_schema():
     panel_source = (ROOT / "static/js/research/panel.js").read_text(encoding="utf-8")
-    style_source = (ROOT / "static/style.css").read_text(encoding="utf-8")
+    style_source = app_css()
     routes_source = (ROOT / "routes/research/research_routes.py").read_text(encoding="utf-8")
     category_schema = _tool_schema("trigger_research")["parameters"]["properties"]["category"]
     rounds_schema = _tool_schema("trigger_research")["parameters"]["properties"]["max_rounds"]

tests/test_workspace_confine.py

@@ -225,8 +225,13 @@ async def test_glob_confined_e2e(ws, admin):
     assert ws not in r["output"]
     assert "/workspace/found.py" in r["output"]
 
-    # a secret outside the workspace must not be discoverable via glob
-    outside = tempfile.mkdtemp()
+    # a secret outside the workspace must not be discoverable via glob.
+    # realpath so this directory and os.path.realpath(ws) below sit in the same
+    # resolved tree. On macOS /tmp is a symlink to /private/tmp, and mixing a
+    # resolved workspace with an unresolved secret makes relpath emit
+    # "../../../../tmp/<abs path>", which trivially contains the absolute path
+    # the assertion is checking for.
+    outside = os.path.realpath(tempfile.mkdtemp())
     secret = os.path.join(outside, "secret.txt")
     with open(secret, "w") as f:
         f.write("nope")