_default_spawn launched the worker subprocess with cwd=workspace and set
HERMES_KANBAN_WORKSPACE, but never set TERMINAL_CWD — so the worker inherited
the dispatching gateway's TERMINAL_CWD. That value takes precedence over the
process cwd in two places:
- tools/file_tools.py::_resolve_base_dir — a relative write_file path resolved
against the gateway user's home instead of the workspace, so artifacts
silently landed outside the workspace (#41312).
- agent_init's context-file loader — AGENTS.md was discovered relative to the
gateway's cwd, so under multi-profile dispatch a worker loaded whichever
gateway won the claim race's AGENTS.md, not the task's (#34619).
Both are the same root cause. Pinning TERMINAL_CWD to the workspace (where the
task's work actually happens) fixes both. Guarded on an existing absolute dir
because file_tools rejects relative/sentinel TERMINAL_CWD values — a non-dir
workspace leaves the inherited value rather than writing a meaningless one.
Closes#34619, closes#41312.
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