[MannXo]

Description

discover_updates read the catalog version with ext_info["version"], so a catalog entry without version made specify extension update exit 1 with KeyError: 'version', and the installed extensions after it were never checked. A null or list value crashed the same way, with TypeError and AttributeError.

This PR reads the value with str(ext_info.get("version")), the expression specify workflow update already uses (src/specify_cli/workflows/command_update.py:79). Such an entry now takes the existing Invalid catalog version ... (skipping) branch and the loop carries on. Entries with a valid version behave as before. A numeric version such as 2 used to crash with TypeError and is now read as "2", as in specify workflow update.

The issue's repro script, on main (67e0f72), last traceback line only:

exit code: 1
🔄 Checking for updates...

Warning: Using non-default extension catalog. Only use catalogs from sources you trust.

KeyError: 'version'

With this PR:

exit code: 0
🔄 Checking for updates...

⚠  aaa: Invalid catalog version 'None' (skipping)
✓ bbb: Up to date (v1.0.0)

All extensions are up to date!
Warning: Using non-default extension catalog. Only use catalogs from sources you trust.

Fixes #5082

Testing

• Tested locally with uv run specify --help
• Ran existing tests with uv sync && uv run pytest
• Tested with a sample project (if applicable)

New tests:

• test_discovery_skips_catalog_entry_without_valid_version in tests/specify_cli/extensions/test_command_update_discovery.py, for a missing, null and list version. The broken entry comes first, and the test checks it is reported as skipped and that the second extension's update is still found.
• test_update_skips_catalog_entry_without_version in tests/specify_cli/extensions/test_command_update.py runs specify extension update through the CLI and checks exit code 0, the skip warning, and an unchanged registry.

With only src/ reverted to main, all 4 new cases fail (KeyError, TypeError, AttributeError, exit code 1). With the fix, the 30 tests in those two files pass.

Full suite on macOS, Python 3.14.6, pytest -n 2 as in CI: main has 12791 passed, 434 skipped and 11 failed, and this branch has 12795 passed, 434 skipped and the same 11 failed. The 11 are the template parity tests that call the host python3, which has no PyYAML here (PyYAML is required to resolve preset template composition), the same 11 #5033 reports. With .venv/bin first on PATH those five files pass on main (261 passed, 114 skipped).

uvx ruff@0.15.0 check src tests passes, and so does git diff --check.

AI Disclosure

• I did not use AI assistance for this contribution
• I did use AI assistance (fill in the disclosure below)

AI disclosure: Claude Code (model: claude-opus-5-5, autonomous) reproduced the bug, wrote the fix and tests, ran the suite and lint, and drafted this description.