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Adds workspace-server/internal/provisioner/t4_privilege_contract.go as the
single source of truth for the T4 ("full machine access") capability set
that template-repo CI workflows currently re-implement as bespoke shell.
Today's t4-conformance gates in template-claude-code / template-hermes /
template-codex each hand-assert agent-uid + token-ownership + host-root
reach. The shell drifts (the very Hermes 401 class bug came from drift),
and there's no way to add a new capability fleet-wide without N template
PRs.
This contract:
* Defines T4Capability as code (Name/Description/Probe/Severity/Source)
* Lists the closure: agent_uid_1000, auth_token_agent_owned,
host_root_reach_via_nsenter, host_fs_write_readback,
docker_socket_reachable, list_peers_http_200, agent_home_writable,
network_egress_https, privileged_flag_observable, pid_host_visible
* Renders to YAML via AsYAML() and cmd/t4-contract-dump so any
template CI can do:
go run ./workspace-server/cmd/t4-contract-dump > t4_capabilities.yaml
and iterate capabilities — new capabilities propagate without
per-template PRs.
* Pure stdlib + no Molecule-AI-internal deps so fork users can adopt
the same contract.
Anti-drift unit tests (7, all green):
- all caps have required fields
- names unique
- core closure (RFC#456 + task #128/#174) is present
- hard-severity is strict majority
- YAML is deterministic + escapes double quotes
- YAML header cites internal#456
- AgentUID const consistent with probes
Does NOT change Docker/Dockerfile or any existing emit-side behavior;
this is purely additive. The provisioner.go T4 branch is unchanged.
Templates adopt the YAML in a separate PR (pilot:
template-claude-code).
Refs: RFC internal#456, task #174, memory
reference_per_template_privilege_contract_class_audit_2026_05_16,
memory feedback_hermes_listpeers_401_token_root600_unreadable_by_uid1000.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>