The eager from_json_obj path is unit-tested; the lazy resolve()/
from_md_dirs path was only hit by the integration suite, so a critical
module relied on Docker for branch coverage. Add tmp-dir tests driving:
all_agent_names with a cwd overlay, load_for_agent on unknown and
malformed-frontmatter agent files, and require_agent's names-only
file-existence checks (home + cwd).
manifest.py: 86% -> 99%. The one remaining line is the OSError branch on
an unreadable agent file (not reliably triggerable cross-environment).
Closes#304
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NkwFXLFff9PYPy4wgVBJp9
didericis