Expand Codex adapter with AskUserQuestion → request_user_input parameter
mapping (including multiSelect workaround and Execute mode fallback) and
Task() → spawn_agent mapping (parallel fan-out, result parsing).
Add convertClaudeAgentToCodexAgent() that generates <codex_agent_role>
headers with role/tools/purpose and cleans agent frontmatter.
Generate config.toml with [features] (multi_agent, request_user_input)
and [agents.gsd-*] role sections pointing to per-agent .toml configs
with sandbox_mode (workspace-write/read-only) and developer_instructions.
Config merge handles 3 cases: new file, existing with GSD marker
(truncate + re-append), existing without marker (inject features +
append agents). Uninstall strips all GSD content including injected
feature keys while preserving user settings.
Closes#779
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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