Run 34421944328 n8n#1: Open WebUI 0.11.0 ships only a Streamable HTTP
MCP client. n8n 1.95.3's MCP Server Trigger speaks SSE only and answered
the client's POST to /webhook/infinito-mcp/sse with 404, so "every
registered MCP server answers Open WebUI's client" failed.
n8n moves to 1.100.1 and the managed trigger to typeVersion 2, which
serves Streamable HTTP at /mcp/<path>. meta/mcp.yml declares
transport: streamable_http at /mcp/infinito-mcp (the trigger path stays
infinito-mcp) and points source_url at the 1.100.1 tree. Open WebUI's
supported_transports drops sse, which its client never spoke; no
provider declares sse any more, so no pairing is lost.
n8n#0: the guest spec probed ${APP_BASE_URL}${MCP_ENDPOINT_PATH} and
expected a refusal of >= 300 without an event stream. The trigger is
exposure: internal, so the public vhost must answer 404; the spec now
asserts exactly that through mcpEndpointUrl(..., N8N_BASE_URL), and the
bearer guard itself is proven in-cluster by the CLI MCP contract.
Requirement 035 and the MCP audit table follow the version and
transport.
Upgrade path, read from upstream at both tags: the postgres migrations
are identical (45/45) and the only new common migration is
AddProjectDescriptionColumn, an additive nullable column; BREAKING-
CHANGES.md lists only 1.98.0 in range (route metric format, Form node
tag attributes, Node >= 20), none of which this deployment uses. A fresh
1.100.1 install ran all 89 migrations and passed the MCP bridge, server,
non-member and guest specs locally.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
supported_version and minimum_version sat in 24 roles and were read by no template, no task and no lookup. Their only consumer was the audit report version column, which turned false the moment an automated image bump ran: qdrant reported a verified version nobody had verified, two releases long. Both leave MCP_KEYS, so a role that declares them again fails the schema lint instead of carrying a field with no effect.
Requirement 025 mandated minimum_version as a MUST and 035 carried it in an example; both are corrected here, otherwise the repository would contradict its own code.
The gate then surfaced five dead docs.mattermost.com links. Mattermost moved to /administration-guide/ and /deployment-guide/, and every replacement was probed for 200 rather than guessed. The MCP page is gone with no successor, so mattermost now points at mcpserver/README.md in the Agents repository, the source rather than a rendered mirror.
Both concerns share three files - mattermost's meta/mcp.yml, requirement 025, and the generated audit.md, which derives from a source of each - so splitting them would commit an artifact that does not match its sources.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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>
enabled and shared were hand-maintained in 24 roles and wrong in both
directions. Both now resolve from the mcp_consumer edges already declared
in meta/services.yml: a server takes the consumers it admits, a client
takes the servers that admit it, and the pair renders as "'peer' in
group_names or ...", or False when no peer is admitted at all. setdefault
keeps meta/mcp.yml and meta/variants.yml as the override channel, so
pinning either key still wins.
The resolved block replaces the mapping instead of being written into it.
_build_role_base_config parks the YAML cache's own object under mcp, so an
in-place setdefault injected the derived keys into every later raw read and
made test_mcp_schema pass alone but fail in a directory run.
The derivation keys on peer presence, never on a peer's own value: a
re-entrant read under _RENDER_GUARD returns the unrendered dict.
Four lints now ask the resolver instead of reading meta/mcp.yml, which they
could not do while the key was hand-written. That is what exposed the eleven
missing hostile-path specs the previous commit closed.
Carries one change that belongs to the WordPress probe but shares a file
with this one: the tool allowlist moves to the hyphenated names the adapter
actually serves.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
allowed_consumers was twenty hand-kept lists of which fourteen were identical, so every new client meant an edit in every provider. A client now declares services.<own-entity>.mcp_consumer: true once and a provider refuses one with mcp_consumer: false, which is also what tells a deliberate exclusion apart from a forgotten entry.
The group_names-gated consumer entries give the inventory resolver the co-deploy edge meta/mcp.yml never had: one of sixty-nine matrix rounds carried an MCP client before, twenty-three role/round pairs do now. bond 0.5 keeps the clients out of round 0 so the host memory budget still holds.
BREAKING CHANGE: meta/mcp.yml no longer accepts allowed_consumers; declare services.<entity>.mcp_consumer on the client instead.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
The oauth2 gate declared no allowed_groups at all while the role carried an mcp RBAC role nothing consulted, so it admitted anyone the proxy authenticated. It now admits the role's own administrator and mcp groups, and a lint derives the client set from meta/mcp.yml rather than a list, which is how the gap surfaced.
Two idempotence defects went with it. The run minted a public-API key, found it again next time and counted that as a change, so the task never converged; and it left that workflow-scoped key standing after every deploy although nothing read it. It is now minted per run and revoked before the run ends. The server workflow also connected nothing, and the trigger serves exactly the tools that reach it over an ai_tool connection, so it served none; it now carries one checked-in read tool with an explicit input schema.
The client side did not exist. It renders an agent workflow with one MCP Client Tool per discovered provider, each pinned to that provider's allowlist, because the node defaults to including every tool an upstream happens to serve. Credentials go through the internal API since the public one of this tag can only create and delete them, never converge an existing one. Every node type, typeVersion and connection literal was read from the pinned source.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
The block sat under services but never behaved like a service. A service has
exactly one providing role, declared with provides, so the registry can map the
key to that role and consumers bind their flag to its presence. No role declares
provides: mcp. There are seventeen providers and the pairing is done by
allowed_consumers inside the block itself.
Every rule that enforces the service model therefore needed an exemption for it:
a shared-provider suppression in fourteen roles, a playwright-service-flag
suppression, and two freshly added exemptions in the dynamic-flag and
variants-static-override checks. Four independent rules, four escape hatches,
one cause. They are all gone now, together with a bond key that only the
resource budgeter reads and only for entries under services, and a wordpress
addon bridge that pointed at a service block that no longer exists.
The block moves to meta/mcp.yml. The applications loader maps meta/<name>.yml to
applications.<app>.<name> generically, so the move needs no wiring; the file
takes the same shape as meta/rbac.yml. Every config path follows, the variant
overrides are lifted out of their services map, and the vocabulary module leaves
the services package because it no longer describes one. roles_with_service
gains an explicit topic parameter rather than an implicit fallback, so nothing
silently resolves against the wrong container.
Files that are otherwise unrelated to this move are included where the committed
tree would otherwise keep pointing at a path that no longer resolves: thirteen
vars files, eleven playwright env templates and one task file.
kevinveenbirkenbachandClaude Opus 5