Unable to persist AGENTS / llmConfig on custom actions — PATCH returns 200 but fields not applied

Hi all We're trying to expose our existing custom workflow actions as tools in Breeze (AI Agents / Breeze Studio), but we’re stuck on a developer/tenant provisioning issue and would appreciate any pointers.What we wantMake our already-created custom actions visible as Breeze tools by adding the Breeze-specific fields (e.g. supportedClients: ["WORKFLOWS","AGENTS"], platformVersion, and llmConfig) so Breeze Studio recognizes them as “Take Action” tools.What we triedCreated and published custom actions via the Automation v4 API — creation works fine; actions are used in production.Sent PATCH /automation/v4/actions/{appId}/{actionId} with body including:{"supportedClients": ["WORKFLOWS","AGENTS"],"platformVersion": "2025.2","llmConfig": { "actionName": "...", "actionDescription": "..." },"published": true}PATCH returns 200 OK and revisionId increments, but a subsequent GET does not include supportedClients, platformVersion, or llmConfig — the action never appears in Breeze Studio.We also tried the internal dev-api endpoint (/dev-api/v1/actions/...) and received 405 Not Allowed.Our developer account is the dedicated Developer Portal (Free Developer plan) and has no billing/upgrade UI.What we suspectHubSpot’s support bot hinted that Breeze/AGENTS requires Starter+ (and for API modifications possibly Professional/Enterprise or Beta access). It looks like the developer account context we use to issue API calls does not have the required Breeze/AI Tools flags enabled, so AGENTS/LLM fields are ignored or blocked.Questions / asksHas anyone successfully converted existing workflow actions into Breeze tools via API? If so — what exact account context / endpoint / auth did you use (developer key vs. OAuth vs. internal dev-api)?Is there a recommended way to test Breeze integration for existing apps when your developer account is a Free Developer portal?Would HubSpot devs confirm whether Breeze (AI Tools / AGENTS) must be explicitly enabled for a developer account, or if a mapped trial/professional portal is required to persist AGENTS / llmConfig on existing actions?We’re happy to share sanitized request/response logs in the thread or provide more details privately. Any help, pointers, or confirmation from HubSpot engineers would be much appreciated!— TimelinesAI Dev Team

Hey @AIakhontov - thanks for posting in the Community!
I’d like to tag in some Community experts here to see what insight they may have for us! @Phil_Vallender, @Mike_Eastwood, and @alyssamwilie - any thoughts to the above?
Shane, Senior Community Moderator