Two mcplocals sharing the same config template (`vllm-local-qwen3`)
no longer collide on mcpd's cluster-wide unique-name constraint.
Each publisher can append a suffix derived from hostname (or any
other stable per-host identifier) so the wire-side names become
distinct (`vllm-local-qwen3-alice`, `vllm-local-qwen3-bob`).
Pair with an explicit `poolName` (v4) and the rows still appear as
one logical pool — agents pinned to any member load-balance across
both.
Config (`~/.mcpctl/config.json`):
{
"publisher": { "suffix": "auto" } // → os.hostname() sanitized
// or { "suffix": "alice" } for explicit override
}
Or via env: `MCPCTL_PUBLISHER_SUFFIX=alice` (operations override).
Resolution order: env var → config.publisher.suffix → empty
(legacy behavior, no mangling). Sanitization lowercases, replaces
non-`[a-z0-9-]` runs with `-`, strips leading/trailing dashes —
the result must satisfy mcpd's name validation, otherwise the
register POST would 422.
Wire shape: RegistrarPublishedProvider gets an optional
`publishName` field. When set, the wire payload's `name` is
`publishName` (suffixed); when not, today's `provider.name`.
Inbound infer/wake task lookups match `publishName ?? provider.name`
so the local registry stays addressable by its original name —
SSE frames carrying the suffixed wire name still find their
provider.
Agents are forwarded with their own suffixed name AND a
`llmName` rewritten through the same per-local→wire map so the
agent rows pin to the suffixed Llm wire name (otherwise
registerVirtualAgents would 404).
Tests: 8 new tests covering applyPublisherSuffix (empty, normal,
length limit, exact-100) and loadPublisherSuffix (env override,
absent, sanitization, dash stripping). Existing registrar tests
untouched — no suffix means no behavior change.
