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* fix(manifests): reject non-string metadata instead of crashing on it `ExtensionManifest` and `PresetManifest` checked only key PRESENCE for `id`/`name`/`version`/`description`, then fed the values straight to `re.match()` and `packaging.Version()`. Both raise a bare `TypeError` on a non-string, which is neither `ValidationError` nor `PresetValidationError`, so it escaped every caller that already handles a malformed manifest. YAML makes this an easy authoring slip rather than a contrived one: an unquoted `version: 1.0` parses as a float and `id: 2` as an int. The user-visible symptom is the one the in-tree comment above the section guards was written to prevent (#3898 for presets, and its extension twin): `list_installed()` degrades a bad manifest to "⚠️ Corrupted extension" but catches only the domain error, so a single bad manifest made `specify extension list` / `specify preset list` exit 1 with a raw traceback and *no output at all* — hiding every healthy extension/preset too, not just the broken one. Also unguarded on the same path: - extension `provides.commands[].name` → `TypeError` from the command-name pattern match. The sibling `file` field was already safe, since `relative_extension_path_violation()` rejects a non-string. - preset `provides.templates[].name`/`.file` → `TypeError` from `re.match` and `os.path.normpath` respectively. The third manifest twin, `IntegrationDescriptor`, is already hardened: it type-checks the same four fields and catches `TypeError` alongside `InvalidVersion`. This brings the other two in line with it. Tests: 68 added across both suites, covering each field against float, int, None, list, dict, and bool, plus an end-to-end guard per manifest type asserting a healthy entry still lists while the bad one degrades. All 68 fail with the source change reverted. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> * Potential fix for pull request finding Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com> --------- Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com> Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>