fix(plugin-config): handle missing type key in oneOf/anyOf schema fields (#344)

* fix(web-ui): dedup registry fetches, surface reconciliation warnings, add check-update endpoint

Story 1 — src/plugin_system/store_manager.py:
Add threading.Lock (_registry_fetch_lock) to fetch_registry(). The outer cache
check remains the hot path (no lock). When the cache is cold, only one thread
hits the network; concurrent callers block on the lock then get the result from
the warm cache (double-checked locking). Eliminates duplicate GitHub requests
on every page load when the 15-minute cache expires.

Story 2 — web_interface/app.py + api_v3.py + overview.html:
_run_startup_reconciliation() now writes /tmp/ledmatrix_reconciliation.json
(atomic tempfile+replace, mirrors hw_status pattern) so the result survives
the background thread. New GET /api/v3/plugins/reconciliation-status reads
that file. Overview page gains a dismissible yellow banner that shows stale
plugin_id values (e.g. sync, github, youtube) and tells the user to remove
them or reinstall from the Plugin Store. Banner is suppressed for the session
after dismiss using sessionStorage keyed on the plugin_id list.

Story 3 — web_interface/blueprints/api_v3.py:
Add GET /api/v3/system/check-update. Does git fetch origin main then compares
local HEAD vs origin/main to compute update_available, remote_sha, and
commits_behind. Result is cached for 5 minutes so it doesn't run git on every
page load. Falls back to {update_available: false} on any error. Eliminates
the 404 logged on every page load.

Story 4 (Pi 5 rgbmatrix rebuild) was already fixed in PR #341.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(plugin-config): handle missing `type` key in schema fields using oneOf/anyOf

Jinja2's `prop.type` on a dict without a `type` key returns an Undefined
object. Because Jinja2 Undefined implements __iter__ as a generator function,
`prop.type is iterable` evaluates True, then `prop.type[0]` calls
Undefined.__getitem__(0) which raises UndefinedError — crashing the
template render and returning HTTP 500. HTMX silently discards the 500
response, leaving the plugin config tab blank.

Fix: use `prop.get('type')` which returns None for missing keys instead of
Undefined. None is falsy, so the condition short-circuits cleanly to the
'string' fallback without attempting subscript access.

Affected plugin: stock-news (max_headlines_per_symbol uses oneOf with no
top-level type). Any future schema using oneOf/anyOf/allOf without an
explicit type will now also render safely rather than crashing.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(security): harden check-update, reconciliation status endpoint, and temp-file write

api_v3.py:
- Add missing `from typing import Dict, Any` and `import stat` (Dict/Any used
  in module-level annotations without being imported)
- check_for_update: capture git-fetch returncode and bail to _safe on failure
  so a network error or non-zero exit can't silently fall through to comparing
  stale refs
- get_reconciliation_status: lstat the file and reject symlinks / non-regular
  files before opening; split exception handling to catch JSONDecodeError and
  PermissionError separately; log with logger.exception; return a generic
  'Status file unavailable' message instead of str(e) to avoid leaking
  internal details

overview.html:
- Replace one-shot reconciliation fetch with a polling loop (2 s interval via
  setTimeout) so the banner still appears when reconciliation finishes after
  the page first loads
- dismissReconciliationBanner: write sessionStorage immediately using the key
  stored on the banner element (set at show time) so dismissal persists even
  if the background sync fetch fails; clear the polling timer on dismiss to
  avoid leaks

app.py:
- Initialize _tmp = None before the temp-file try block; narrow exception
  to (OSError, ValueError, TypeError); set _tmp = None after a successful
  _os.replace so the finally branch knows nothing needs unlinking; add
  finally clause to unlink the temp file if it was left behind by a mid-write
  failure

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix: reconciliation status errors return graceful not-done instead of HTTP 500; log fetch stderr

get_reconciliation_status: symlink/non-regular-file, JSONDecodeError, and
PermissionError all now return {'done': False, 'unresolved': []} so the
polling loop in overview.html keeps retrying rather than stopping on a
transient error.

check_for_update: on fetch failure, log the decoded stderr for remote
debugging and write _safe into _update_check_cache so the TTL covers the
failure window (avoids hammering git on every request during an outage).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(bandit): replace hardcoded /tmp paths with tempfile.gettempdir() (B108)

Codacy/Bandit B108 flagged two hardcoded '/tmp/' string literals in app.py
(lines 737, 741). Replaced with _tempfile.gettempdir() in both the final-
path construction and the mkstemp dir= argument so no bare '/tmp/' literal
remains. Also updated the matching reader path in api_v3.py for consistency
(both sides must agree on the filename), adding `import tempfile` there.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Chuck <chuck@example.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

src/plugin_system/store_manager.py

@@ -10,6 +10,7 @@ import json
 import stat
 import subprocess
 import shutil
+import threading
 import zipfile
 import tempfile
 import requests
@@ -100,6 +101,10 @@ class PluginStoreManager:
         # handlers. Bumping the cached-entry timestamp on failure serves
         # the stale payload cheaply until the backoff expires.
         self._failure_backoff_seconds = 60
+        # Prevents concurrent callers from each firing a network request when
+        # the registry cache expires. Only one thread fetches; others wait and
+        # then get the result from the warm cache (double-checked locking).
+        self._registry_fetch_lock = threading.Lock()
 
         # Ensure plugins directory exists
         self.plugins_dir.mkdir(exist_ok=True)
@@ -575,41 +580,50 @@ class PluginStoreManager:
             (current_time - self.registry_cache_time) < self.registry_cache_timeout):
             return self.registry_cache
 
-        try:
+        with self._registry_fetch_lock:
-            self.logger.info(f"Fetching plugin registry from {self.REGISTRY_URL}")
+            # Re-check inside the lock — a concurrent caller that was waiting
-            response = self._http_get_with_retries(self.REGISTRY_URL, timeout=10)
+            # may have already populated the cache while we blocked.
-            response.raise_for_status()
+            current_time = time.time()
-            self.registry_cache = response.json()
+            if (self.registry_cache and self.registry_cache_time and
-            self.registry_cache_time = current_time
+                    not force_refresh and
-            self.logger.info(f"Fetched registry with {len(self.registry_cache.get('plugins', []))} plugins")
+                    (current_time - self.registry_cache_time) < self.registry_cache_timeout):
-            return self.registry_cache
-        except requests.RequestException as e:
-            self.logger.error(f"Error fetching registry: {e}")
-            if raise_on_failure:
-                raise
-            # Prefer stale cache over an empty list so the plugin list UI
-            # keeps working on a flaky connection (e.g. Pi on WiFi). Bump
-            # registry_cache_time into a short backoff window so the next
-            # request serves the stale payload cheaply instead of
-            # re-hitting the network on every request (matches the
-            # pattern used by github_cache / commit_info_cache).
-            if self.registry_cache:
-                self.logger.warning("Falling back to stale registry cache")
-                self.registry_cache_time = (
-                    time.time() + self._failure_backoff_seconds - self.registry_cache_timeout
-                )
                 return self.registry_cache
-            return {"plugins": []}
+
-        except json.JSONDecodeError as e:
+            try:
-            self.logger.error(f"Error parsing registry JSON: {e}")
+                self.logger.info(f"Fetching plugin registry from {self.REGISTRY_URL}")
-            if raise_on_failure:
+                response = self._http_get_with_retries(self.REGISTRY_URL, timeout=10)
-                raise
+                response.raise_for_status()
-            if self.registry_cache:
+                self.registry_cache = response.json()
-                self.registry_cache_time = (
+                self.registry_cache_time = current_time
-                    time.time() + self._failure_backoff_seconds - self.registry_cache_timeout
+                self.logger.info(f"Fetched registry with {len(self.registry_cache.get('plugins', []))} plugins")
-                )
                 return self.registry_cache
-            return {"plugins": []}
+            except requests.RequestException as e:
+                self.logger.error(f"Error fetching registry: {e}")
+                if raise_on_failure:
+                    raise
+                # Prefer stale cache over an empty list so the plugin list UI
+                # keeps working on a flaky connection (e.g. Pi on WiFi). Bump
+                # registry_cache_time into a short backoff window so the next
+                # request serves the stale payload cheaply instead of
+                # re-hitting the network on every request (matches the
+                # pattern used by github_cache / commit_info_cache).
+                if self.registry_cache:
+                    self.logger.warning("Falling back to stale registry cache")
+                    self.registry_cache_time = (
+                        time.time() + self._failure_backoff_seconds - self.registry_cache_timeout
+                    )
+                    return self.registry_cache
+                return {"plugins": []}
+            except json.JSONDecodeError as e:
+                self.logger.error(f"Error parsing registry JSON: {e}")
+                if raise_on_failure:
+                    raise
+                if self.registry_cache:
+                    self.registry_cache_time = (
+                        time.time() + self._failure_backoff_seconds - self.registry_cache_timeout
+                    )
+                    return self.registry_cache
+                return {"plugins": []}
     
     def search_plugins(self, query: str = "", category: str = "", tags: List[str] = None, fetch_commit_info: bool = True, include_saved_repos: bool = True, saved_repositories_manager = None) -> List[Dict]:
         """

web_interface/app.py

@@ -716,6 +716,41 @@ def _run_startup_reconciliation() -> None:
                 "manual 'Reconcile' action to resolve.",
                 len(result.inconsistencies_manual),
             )
+
+        # Write status file so the web UI can surface unresolved issues as a
+        # banner without the user having to read journalctl. Mirrors the
+        # hw_status pattern (/tmp/led_matrix_hw_status.json).
+        import json as _json, tempfile as _tempfile, os as _os
+        _recon_status = {
+            "done": True,
+            "successful": result.reconciliation_successful,
+            "fixed_count": len(result.inconsistencies_fixed),
+            "unresolved": [
+                {
+                    "plugin_id": inc.plugin_id,
+                    "type": inc.inconsistency_type.value,
+                    "description": inc.description,
+                }
+                for inc in result.inconsistencies_manual
+            ],
+        }
+        _recon_path = _os.path.join(_tempfile.gettempdir(), "ledmatrix_reconciliation.json")
+        _tmp = None
+        try:
+            if not _os.path.islink(_recon_path):
+                _fd, _tmp = _tempfile.mkstemp(dir=_tempfile.gettempdir(), prefix=".led_recon_")
+                with _os.fdopen(_fd, "w") as _f:
+                    _json.dump(_recon_status, _f)
+                _os.replace(_tmp, _recon_path)
+                _tmp = None  # Rename succeeded; nothing to clean up
+        except (OSError, ValueError, TypeError) as _e:
+            _logger.warning("[Reconciliation] Could not write status file: %s", _e)
+        finally:
+            if _tmp is not None and _os.path.exists(_tmp):
+                try:
+                    _os.unlink(_tmp)
+                except OSError:
+                    pass
     except Exception as e:
         _logger.error("[Reconciliation] Error: %s", e, exc_info=True)
     finally:

web_interface/blueprints/api_v3.py

@@ -2,14 +2,17 @@ from flask import Blueprint, request, jsonify, Response
 import json
 import os
 import re
+import stat
 import sys
 import subprocess
+import tempfile
 import time
 import hashlib
 import uuid
 import logging
 from datetime import datetime
 from pathlib import Path
+from typing import Dict, Any
 
 logger = logging.getLogger(__name__)
 
@@ -1384,6 +1387,59 @@ def get_system_version():
     except Exception as e:
         return jsonify({'status': 'error', 'message': str(e)}), 500
 
+_update_check_cache: Dict[str, Any] = {'result': None, 'ts': 0.0}
+_UPDATE_CHECK_TTL = 300  # 5 minutes — avoids a git fetch on every page load
+
+@api_v3.route('/system/check-update', methods=['GET'])
+def check_for_update():
+    """Check whether a newer LEDMatrix commit is available on origin/main."""
+    now = time.time()
+    if _update_check_cache['result'] and now - _update_check_cache['ts'] < _UPDATE_CHECK_TTL:
+        return jsonify(_update_check_cache['result'])
+
+    _safe: Dict[str, Any] = {'update_available': False, 'remote_sha': 'unknown', 'commits_behind': 0}
+    try:
+        cwd = str(PROJECT_ROOT)
+        fetch_result = subprocess.run(
+            ['git', 'fetch', 'origin', 'main', '--quiet'],
+            capture_output=True, timeout=10, cwd=cwd,
+        )
+        if fetch_result.returncode != 0:
+            logger.warning("check-update: git fetch failed (rc=%d): %s",
+                           fetch_result.returncode,
+                           fetch_result.stderr.decode(errors='replace').strip())
+            _update_check_cache['result'] = _safe
+            _update_check_cache['ts'] = now
+            return jsonify(_safe)
+        local = subprocess.run(
+            ['git', 'rev-parse', 'HEAD'],
+            capture_output=True, text=True, timeout=5, cwd=cwd,
+        ).stdout.strip()
+        remote = subprocess.run(
+            ['git', 'rev-parse', 'origin/main'],
+            capture_output=True, text=True, timeout=5, cwd=cwd,
+        ).stdout.strip()
+
+        if not local or not remote:
+            return jsonify(_safe)
+
+        if local == remote:
+            result: Dict[str, Any] = {'update_available': False, 'remote_sha': remote, 'commits_behind': 0}
+        else:
+            count_str = subprocess.run(
+                ['git', 'rev-list', 'HEAD..origin/main', '--count'],
+                capture_output=True, text=True, timeout=5, cwd=cwd,
+            ).stdout.strip()
+            count = int(count_str) if count_str.isdigit() else 0
+            result = {'update_available': count > 0, 'remote_sha': remote, 'commits_behind': count}
+
+        _update_check_cache['result'] = result
+        _update_check_cache['ts'] = now
+        return jsonify(result)
+    except Exception as e:
+        logger.warning("check-update failed: %s", e)
+        return jsonify(_safe)
+
 @api_v3.route('/system/action', methods=['POST'])
 def execute_system_action():
     """Execute system actions (start/stop/reboot/etc)"""
@@ -2433,6 +2489,28 @@ def reconcile_plugin_state():
             status_code=500
         )
 
+@api_v3.route('/plugins/reconciliation-status', methods=['GET'])
+def get_reconciliation_status():
+    """Return the result of the last startup reconciliation from /tmp status file."""
+    _recon_path = os.path.join(tempfile.gettempdir(), "ledmatrix_reconciliation.json")
+    try:
+        st = os.lstat(_recon_path)
+    except FileNotFoundError:
+        return jsonify({'status': 'success', 'data': {'done': False, 'unresolved': []}})
+    if stat.S_ISLNK(st.st_mode) or not stat.S_ISREG(st.st_mode):
+        logger.warning("[Reconciliation] Status file is not a regular file: %s", _recon_path)
+        return jsonify({'status': 'success', 'data': {'done': False, 'unresolved': []}})
+    try:
+        with open(_recon_path) as _f:
+            data = json.load(_f)
+        return jsonify({'status': 'success', 'data': data})
+    except json.JSONDecodeError:
+        logger.exception("[Reconciliation] Failed to parse status file: %s", _recon_path)
+        return jsonify({'status': 'success', 'data': {'done': False, 'unresolved': []}})
+    except PermissionError:
+        logger.exception("[Reconciliation] Permission denied reading status file: %s", _recon_path)
+        return jsonify({'status': 'success', 'data': {'done': False, 'unresolved': []}})
+
 @api_v3.route('/plugins/config', methods=['GET'])
 def get_plugin_config():
     """Get plugin configuration"""

web_interface/templates/v3/partials/overview.html

@@ -1,3 +1,66 @@
+<!-- Reconciliation warning banner: shown when startup reconciliation found stale plugin config entries -->
+<div id="reconciliation-banner" class="bg-yellow-50 border border-yellow-300 rounded-lg p-4 mb-4 flex items-start" style="display:none !important" role="alert">
+    <div class="flex-shrink-0 mr-3 mt-0.5">
+        <i class="fas fa-exclamation-triangle text-yellow-500"></i>
+    </div>
+    <div class="flex-1">
+        <p class="text-sm font-medium text-yellow-800">Plugin Config Warning</p>
+        <p class="text-sm text-yellow-700 mt-1" id="reconciliation-banner-text"></p>
+    </div>
+    <button type="button" onclick="window.dismissReconciliationBanner()" class="ml-4 flex-shrink-0 text-yellow-500 hover:text-yellow-700" aria-label="Dismiss">
+        <i class="fas fa-times"></i>
+    </button>
+</div>
+<script>
+(function () {
+    var DISMISS_KEY = 'ledmatrix-recon-dismissed';
+    var _recon_timer = null;
+
+    function checkReconciliation() {
+        fetch('/api/v3/plugins/reconciliation-status')
+            .then(function (r) { return r.json(); })
+            .then(function (resp) {
+                var d = resp.data || {};
+                if (!d.done) {
+                    // Reconciliation still running — poll again shortly
+                    _recon_timer = setTimeout(checkReconciliation, 2000);
+                    return;
+                }
+                _recon_timer = null;
+                if (!d.unresolved || d.unresolved.length === 0) return;
+                var key = d.unresolved.map(function (i) { return i.plugin_id; }).sort().join(',');
+                if (sessionStorage.getItem(DISMISS_KEY) === key) return;
+                var ids = d.unresolved.map(function (i) { return i.plugin_id; }).join(', ');
+                document.getElementById('reconciliation-banner-text').textContent =
+                    'Stale plugin config entries found: ' + ids +
+                    '. Remove them from config.json or reinstall via the Plugin Store.';
+                var banner = document.getElementById('reconciliation-banner');
+                banner.dataset.dismissKey = key;
+                banner.style.setProperty('display', 'flex', 'important');
+            })
+            .catch(function () {});
+    }
+    checkReconciliation();
+
+    window.dismissReconciliationBanner = function () {
+        var banner = document.getElementById('reconciliation-banner');
+        banner.style.setProperty('display', 'none', 'important');
+        if (_recon_timer !== null) {
+            clearTimeout(_recon_timer);
+            _recon_timer = null;
+        }
+        // Persist dismissal immediately so the banner won't reappear on reload
+        // even if the background sync fetch below fails.
+        var key = banner.dataset.dismissKey;
+        if (key) {
+            try { sessionStorage.setItem(DISMISS_KEY, key); } catch (e) {}
+        }
+        // Background sync only — do not rely on this for DISMISS_KEY or hiding.
+        fetch('/api/v3/plugins/reconciliation-status').catch(function () {});
+    };
+}());
+</script>
+
 <div class="bg-white rounded-lg shadow p-6">
     <div class="border-b border-gray-200 pb-4 mb-6">
         <h2 class="text-lg font-semibold text-gray-900">System Overview</h2>

web_interface/templates/v3/partials/plugin_config.html

@@ -9,7 +9,8 @@
     {% set field_id = (plugin_id ~ '-' ~ full_key)|replace('.', '-')|replace('_', '-') %}
     {% set label = prop.title if prop.title else key|replace('_', ' ')|title %}
     {% set description = prop.description if prop.description else '' %}
-    {% set field_type = prop.type if prop.type is string else (prop.type[0] if prop.type is iterable else 'string') %}
+    {% set _pt = prop.get('type') %}
+    {% set field_type = _pt if (_pt is string) else ((_pt | first) if (_pt and _pt is iterable and _pt is not string) else 'string') %}
     
     {# Handle nested objects - check for widget first #}
     {% if field_type == 'object' %}