feat(reminders): add reminder system to perform long-term goals in the background

[mudler]

This is an attempt to cover #128 and #72 . The idea is to have a set of actions to manage reminders (add, list and remove), and if the agent is enabled to perform background tasks, it will check the reminders periodically and fire new jobs.

Results are then returned to the user as new conversations with a summary of what was done.

[Copilot]

Pull Request Overview

Adds a reminder framework so the agent can schedule, list, and remove recurring or one-time jobs that run in the background, then report results back to the user.

• Introduces new actions (set, list, remove reminders) and ties them into the action registry
• Extends AgentSharedState with a reminder store and updates periodicallyRun to trigger and summarize reminders
• Implements core reminder logic and CLI for actions in core/action/reminder.go

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
services/actions.go	Registered new reminder actions in constants and builder
go.mod	Added cron/v3 dependency for scheduling
core/types/state.go	Defined ReminderActionResponse and added reminders to state
core/agent/templates.go	Added reminderTemplate for reminder processing
core/agent/agent.go	Implemented periodic reminder checks and summaries
core/action/reminder.go	Created set, list, and remove reminder actions

Comments suppressed due to low confidence (2)

core/action/reminder.go:1

• New reminder actions have no accompanying unit tests; consider adding tests for setting, listing, and removing reminders to validate cron parsing, state updates, and error cases.

package action

core/agent/agent.go:1028

• [nitpick] There are large blocks of commented‐out code in periodicallyRun; consider removing or moving these to a design doc to keep the implementation focused and readable.

// TODO: Would be nice if we have a special action to

[Copilot]

You register only the "set_reminder" action here but not the list or remove actions; append action.NewListReminders() and action.NewRemoveReminder() as well so those tools are available during planning.

Suggested change

	// Add the reminder action
	allActions = append(allActions, action.NewReminder())
	// Add the reminder actions
	allActions = append(allActions, action.NewReminder())
	allActions = append(allActions, action.NewListReminders())
	allActions = append(allActions, action.NewRemoveReminder())

[Copilot]

The template references {{.Message}} but renderTemplate doesn't supply a Message field in its execution context—either include Message or use an existing field like Reasoning.

[Copilot]

[nitpick] You have multiple require blocks—consider consolidating them into one to improve readability of module dependencies.