The session correctly stores `reasoningLevel: "off"`:

{
  "reasoningLevel": "off",
  "thinkingLevel": null
}


The delivery code checks `includeReasoning: reasoningMode === "on"` but the Matrix extension's delivery path appears to bypass or ignore this check.

Additionally, `/reasoning off` may have a secondary bug: when reasoning is set to "off", the code **deletes** the field (`delete sessionEntry.reasoningLevel`) rather than setting it explicitly to `"off"`. This causes the default model-based reasoning level to kick in for models that support reasoning (like Claude Opus).

Relevant code path (`reply-DW3JcvGm.js`):

let resolvedReasoningLevel = directives.reasoningLevel ?? sessionEntry?.reasoningLevel ?? "off";
if (!(directives.reasoningLevel !== void 0 || sessionEntry?.reasoningLevel !== void 0 && sessionEntry?.reasoningLevel !== null) && resolvedReasoningLevel === "off") 
  resolvedReasoningLevel = await modelState.resolveDefaultReasoningLevel();


When `sessionEntry.reasoningLevel` is `null` (deleted), `resolveDefaultReasoningLevel()` returns `"on"` for reasoning-capable models.



Configuration:


{
  channels: {
    matrix: {
      enabled: true,
      homeserver: "https://matrix.org",
      userId: "@<redacted>:matrix.org",
      dm: {
        policy: "allowlist",
        allowFrom: ["@<redacted>:matrix.org"]
      }
    }
  },
  agents: {
    defaults: {
      thinkingDefault: "low",
      verboseDefault: "off"
    }
  }
}


### Workaround attempted

Manually setting `reasoningLevel: "off"` (string, not null) in the session JSON file and restarting gateway — did not resolve the issue for Matrix delivery.