fix(agents): harden shell adapter bridge and address double-check review feedback

- create_session.sh: add explicit case fallback for delegate_agent (R1)
- lib_py.agents: add spawn-spec, resume-spec, exit-key argv CLI subcommands (R2)
- resume_session.sh, stop_session.sh: replace python string interpolation with safe argv subcommands (R2)
- stop_session.sh: dynamically iterate adapter.identity_cache_fields (R3)
- verify_session.py, workspace_uuid.py: remove dead imports (R9/N4)
- tests/test_a4_adapter_contract.py: add CLI bridge subcommand, clean-env PYTHONPATH safety, and fallback contract tests (R12/N1)
- SKILL.md, docs, logs: synchronize IMPROVEMENTS.md, LOG.md, and resolve_session_id wording (R8/R10/R11)
- promote verified peer review reports for cline (e7b9812b) and claude (31730364)

.agents/skills/lib_py/verify_session.py

@@ -79,11 +79,8 @@ def workspace_key(path):
         p = path
     return p.replace("/", "-").replace("_", "-")
 
-from lib_py.paths import resolve_home
-
 def verify_session_uuid(ws, agent, uuid, row=None, home_dir=None, claude_dir=None, mode="discover"):
     import os, json, sqlite3
-    from lib_py.paths import resolve_home
     from lib_py.agents.registry import get_adapter
     from lib_py.agents.base import DiscoveryContext