Codex review on #3829: when an MCP server lives in a non-writable
source config such as opencode.json with enabled:false, the dashboard
re-enable had nowhere to write to — the writable mcp.json fallback
did not own the server, so setMcpServerEnabled fell through to the
denylist and the source's enabled:false kept the row disabled.
Added a parallel allowlist to the user-level mcp.json that overrides
a non-writable source's enabled:false flag without ever mutating the
foreign config:
- types + schema: new enabledServers array (mirrors disabledServers).
- config-writer: readEnabledServers + setServerForceEnabled helpers,
and setMcpServerEnabled now writes to enabledServers on enable
when no writable mcp.json owns the server, clears it whenever a
writable source becomes the source of truth, and always clears the
override on disable so a force-enabled server can be turned off.
- mcp/config (runtime loader) and state-manager (dashboard read):
honor enabledServers as an override on enabled:false, while still
letting disabledServers win.
- Added a regression test that walks the full lifecycle for an
opencode.json server: enabled:false is surfaced as disabled, the
dashboard re-enable force-enables via enabledServers without
touching opencode.json, then disable clears the override and
populates disabledServers.
Fixes#3827