Closes the #1787 loop — the sanctioned create path now that agents
can't create repos directly. Adds:
- wire: Request::CreateRepo{repo} + Response::RepoCreated{full_name,
clone_url} (hive-sh4re).
- agent_server: dispatch_shared arm + handle_create_repo — validates the
repo name, then forge::create_agent_repo (org-owned repo, agent=write
collaborator, operator-team branch protection). Returns the full name
+ clone url so the agent can git clone immediately.
- MCP: create_repo tool + CreateRepoArgs in the harness.
- a new opt-in ToolGroup::Forge (=[create_repo]) so the operator
controls which agents can spin up repos (least privilege).
Workspace clippy -D warnings, cargo test, nix fmt all green.
f1d54ce12c