The contract check ran as an Ansible task in the middle of every provider deploy, and the two client checks ran the same way. A test that is part of the deploy cannot be run without deploying, cannot be re-run on its own, and reports its verdict as a deploy failure. Twenty-seven task files lose 491 lines to this.
It is now what it always was. Each provider ships files/test/test.sh, templates/test.env.j2 and meta/tests.yml, and test-e2e-cli stages one shared harness beside it: run.sh drives contract.sh in a throwaway container on the provider's own network, then isolation.sh for adapter-fronted providers. The read probe each provider offers moved from the calling task into meta/mcp.yml next to the allowlist it must satisfy, and the schema now rejects a read probe naming a tool outside that allowlist.
The bearer the test presents is the one a client resolves through mcp.credential, via the new mcp_client_bearer lookup over resolve_credential, which moved to utils.roles.applications.mcp so it is the same function mcp_servers renders every client connection with. The probe presented whatever the calling role passed, which for the fifteen adapter-fronted providers is a different secret than any client holds.
Sidecar isolation is read from the engine rather than measured inside the container, so it no longer needs a delegation to the node holding the task: attachment is compared by network name, which drops the gwbridge special case, and a swarm worker says it cannot measure instead of skipping silently.
Retrying is bounded by wall clock against MCP_DEADLINE_SECONDS, which scales through the same lookup('timeout') as the harness budget it has to stay under. A flag that is neither true nor false aborts rather than reading as off.
mcp-provider-probe becomes mcp-provider-cli-test: an enabled provider must ship the test rather than include the task. mcp-probe-bearer becomes mcp-adapter-bearer, tying ADAPTER_BEARER to the declared credential key now that no probe include carries it. A new integration test renders the shared env template for every provider through Ansible's own templar, so a later change to it breaks visibly instead of poisoning twenty deploys quietly.
Hermes and OpenClaw keep their client-side proof as CLI tests of their own.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
The least-privilege half of the criterion could not hold as built.
provision_mcp.py creates the endpoint owner's workspace through
CoreHandler().create_workspace, which makes that account its ADMIN, and
2.3.3 knows only ADMIN and MEMBER - both write table data. There is no
read-only workspace role to demote to, so mutating_tools_enabled: false
bounded nothing while create_rows, update_rows and delete_rows sat in the
served allowlist.
The adapter's contract simply omits them: a client calling one is refused
with DENY_UNKNOWN_TOOL. Omission is the mechanism, since passthrough.py
refuses to load a contract that lists a mutating tool while mutations are
off. The other ten stay recorded under upstream_serves so a version bump
enabling one shows up as drift rather than as a silently wider surface.
The transport was what reverted this twice. Baserow speaks classic
HTTP+SSE, where a GET opens the response stream and the stream names a
second URL for requests, while the adapter only ever spoke Streamable
HTTP. adapter.upstream_transport selects sse.py and defaults to
streamable_http, so no existing provider changes.
The endpoint key stops being a client credential. Clients present
credentials.mcp_bearer to the sidecar; the key reaches the sidecar as
ADAPTER_UPSTREAM_PATH_KEY and is spliced in percent-encoded, so it never
enters the rendered contract and a key carrying a separator cannot open a
path of its own.
Deploy is green: the probe reached list_databases over SSE, the served
surface matched the contract, and the sidecar proved it reaches only its
provider.
Twelve callers load their scripts with the relative form
lookup('file', 'name.py'), which resolves against the role's files/
directory. dfe7a7fdd moved those scripts into files/python/ without
updating them, so the MCP provisioning and probes of baserow, checkmk,
flowise, gitlab, homeassistant, jellyfin, n8n, openwebui and pretix, plus
n8n's AI gateway task, all resolved a path that no longer exists.
This is the second time the same relocation left callers behind. After
2aec4326a fixed the php paths, the claim that no stale references remained
came from grepping the worktree, which already carried the corrected paths;
HEAD still held the old ones. The check has to run against the commit.
Verified against HEAD this time: the eleven remaining stale relative lookups
are exactly the files in this bundle, and no other loading form (copy src,
script) carries a stale path.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Every MCP role keeps its task tree under tasks/utils/ without numeric
prefixes, so a caller can reach any of them through include_role
tasks_from. utils/roles/mapping.py holds that path as the single source.
Ansible resolves a relative include against the including file's own
directory when that file was reached by path, but against tasks/ when it
was reached through tasks_from. The same file therefore loaded from its
own role and failed from a caller using tasks_from. Every nested include
now names {{ role_path }}/tasks/utils/..., which holds under both bases,
and a lint walks each tasks_from entrypoint transitively to keep it so.
The exec-gating lint learns the same form, otherwise it loses the include
chain and reports inherited IS_STACK_HOST gates as missing.
The expression resolving a provider's stored token appeared eighteen
times. plugins/lookup/mcp_credential.py replaces it, and mcp_probe_owner
disappears from eight roles: it was only ever a step towards the bearer
and no probe read it.
The Hermes and OpenClaw probes stop aborting the play while it is still
running. Roles deploy in dependency order, so a client probing during its
own role can run before a provider exists at all, and failing there
prevents that provider from ever deploying. The verdict moves to the
reconciliation pass, gated on MCP_RECONCILE_STRICT, which the reconciler
sets and group_vars declares so the readers need no default.
The sys-svc-mcp-reconcile role is added here; wiring it into a stage is a
separate change.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
kevinveenbirkenbachandClaude Opus 5