https://github.com/github/copilot-sdk/issues/251#issuecomment-3906728084

[hugoo0]

We traced this to initializeSession in the CLI. The chain:

1. SDK sends session.create with customAgents: [...] → CLI sets this.customAgents correctly
2. initializeSession() then calls updateOptions() multiple times for each feature callback (external tools, permission request, user input request, hooks) — none of these calls include the customAgents key
3. Inside updateOptions, when e.customAgents !== void 0 is false (i.e. key absent), it fires this.loadCustomAgents()
4. loadCustomAgents() with Copilot auth (provider is falsy, authInfo is set) fetches org/enterprise agents from the GitHub API → returns [] → overwrites this.customAgents

Each updateOptions call without customAgents triggers a fresh loadCustomAgents(), so the overwrite can happen multiple times.

Workaround until issue is fixed: Removing enableUserInputCallback and enableHooksCallback from the session config skips the updateOptions calls that trigger the overwrite, which remediated the issue for us.

Suggested fix: Skip loadCustomAgents() when agents were explicitly provided at session creation, or (b) pass customAgents through in every updateOptions call from initializeSession.

@knifeyspoony - Is this workaround applicable for DOTNET SDK as well? Also, did you notice any side effects of this workaround?

Originally posted by @ShrayRastogi in #251

[stomde]

Gees