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fix(agents): make injected MCP launch requirements explicit

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Optional injected servers must survive persistence and reload without turning missing transport support into launch refusal. Required external and plugin servers keep their existing refusal. Advertise the optional MCP contract so older hosts retain established strict launch behavior.
This commit is contained in:
Mohamed Boudra
2026-10-29 08:58:25 +01:00
parent c47e1f178b
commit e1684aece0
9 changed files with 91 additions and 51 deletions
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docs/providers.md
+10 -3
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@@ -30,9 +30,16 @@ at session startup. See [provider configuration](custom-providers.md#provider-op
for defaults and merge rules, and the [SDK guide](../public-docs/sdk/provider-options.md)
for native keys and examples.
Exact MCP preapproval is a separate daemon-owned contract. A new provider must fail
closed for Hub unattended execution until it can approve one exact injected MCP
server and tool identity without approving native tools.
Exact MCP preapproval is a separate daemon-owned contract. A required tool policy
(the default) fails closed unless the provider can approve exact injected server/tool
identities without approving native tools. Native agent creation also accepts
`toolPolicy.enforcement: "if-supported"` for automatic approval convenience:
unsupported providers retain ordinary MCP configuration and native permissions.
Hub uses that optional request; MCP support and exact approval are not provider
eligibility requirements. Optional injection is declared separately with
`mcpServerRequirements: { [serverName]: "optional" }`; other injected servers
(including plugin-owned servers) keep their required semantics. The daemon
advertises this native launch contract as `features.optionalMcpSupport`. The legacy Hub create API remains strict-only.
## Core adapter patterns