feat: implement modular task architecture and Lua-based plugin engine

- closes #42 finally

Author: programmersd21

CHANGELOG.md

@@ -5,6 +5,18 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## v1.5.6 (2026-05-08)
+
+### Added
+* **Safe Task Deletion**: Refactored task deletion to be context-aware and safer. 
+  * `t` → deletes tasks in current tab/filter.
+  * `a` → deletes all tasks database-wide with robust confirmation.
+* **Configurable Edit Preview**: Added `[edit] preview = true` to `config.toml` to toggle live markdown preview during task editing, matching consistency with the creation flow.
+* **Undo/Redo System**: Integrated a robust history engine that allows for seamless undo and redo of almost all task operations.
+  * Supports: Task creation, single/bulk deletion, editing, status toggles, priority changes, and deadline updates.
+  * **Live Synchronization**: Reversions are applied instantly to the database and reflected in the TUI without requiring a restart.
+* **Configurable Shortcuts**: Added `[history] undo = "ctrl+z"` and `[history] redo = "ctrl+y"` to `config.toml` to configure undo/redo shortcuts.
+
 ## [1.5.5]
 
 ### Added

README.md

@@ -92,11 +92,14 @@ Press `s` to open a next-gen "Command Center". Visualize your **Productivity DNA
 Gemini integration (`gemini-3.1-flash-lite-preview` / `gemini-2.5-flash-lite` / `gemini-2.0-flash-lite`). Toggle with `ctrl+a`. Create and manage complex recurring tasks with natural language, including assigning to specific projects. Invisible until you need it.
 
 ### 🎨 Beautiful by Default
-32 built-in themes with edge-to-edge background coverage. Live switching with `t`. Bento-style layout. Real-time Markdown preview (`ctrl+p`). Cinematic create/complete/delete animations — or disable them entirely in `config.toml`.
+32 built-in themes with edge-to-edge background coverage. Live switching with `t`. Bento-style layout. Real-time Markdown preview (`ctrl+p`), with configurable default state in `config.toml` under `[edit]`. Cinematic create/complete/delete animations — or disable them entirely in `config.toml`.
 
 ### 🧩 Extensible to the Core
 A Lua plugin system hooks into task events. A headless CLI API enables full scripting. An MCP server opens Kairo to AI agents — with complete support for recurring schedules and nested hierarchies.
 
+### ↩️ Undo & Redo
+Kairo now tracks your every move with a local history engine. Instantly reverse mistakes with `ctrl+z` or re-apply undone actions with `ctrl+y`. Supports task creation, deletion (including bulk), editing, and status changes. Everything is synchronized live with the database.
+
 ### 🎨 Tag Highlighting
 Color-code your tags directly in `config.toml`. Supports hex codes or theme-aware `ui-*` aliases (e.g., `ui-accent`).
 
@@ -129,6 +132,8 @@ diy     = "bg=ui-accent"
 | `ctrl+s` | Settings |
 | `x` | Import / Export |
 | `?` | Help |
+| `ctrl+z` | Undo last action |
+| `ctrl+y` | Redo last undone |
 | `ctrl+w` | Welcome tour |
 
 <div align="center">

VERSION.txt

@@ -1 +1 @@
-1.5.5
+1.5.6

configs/kairo.example.toml

@@ -36,6 +36,9 @@ auto_push = true
 enabled = true
 dir = "plugins"
 
+[edit]
+preview = true
+
 [keymap]
 palette = "ctrl+p"
 task_search = "/"
@@ -65,3 +68,5 @@ import_export = "x"
 ai_panel_toggle = "ctrl+a"
 stats = "s"
 project_switcher = "ctrl+e"
+undo = "ctrl+z"
+redo = "ctrl+y"

go.mod

@@ -57,6 +57,7 @@ require (
 	github.com/pkg/errors v0.8.1 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
+	github.com/sahilm/fuzzy v0.1.1 // indirect
 	github.com/spf13/cast v1.7.1 // indirect
 	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
 	github.com/yosida95/uritemplate/v3 v3.0.2 // indirect

go.sum

@@ -111,6 +111,8 @@ github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
+github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
 github.com/lucasb-eyer/go-colorful v1.2.0 h1:1nnpGOrhyZZuNyfu1QjKiUICQ74+3FNCN69Aj6K7nkY=
 github.com/lucasb-eyer/go-colorful v1.2.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
 github.com/mark3labs/mcp-go v0.49.0 h1:7Ssx4d7/T86qnWoJIdye7wEEvUzv39UIbnZb/FqUZMY=
@@ -153,6 +155,8 @@ github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
 github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
 github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
 github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
+github.com/sahilm/fuzzy v0.1.1 h1:ceu5RHF8DGgoi+/dR5PsECjCDH1BE3Fnmpo7aVXOdRA=
+github.com/sahilm/fuzzy v0.1.1/go.mod h1:VFvziUEIMCrT6A6tw2RFIXPXXmzXbOsSHF0DOI8ZK9Y=
 github.com/spf13/cast v1.7.1 h1:cuNEagBQEHWN1FnbGEjCXL2szYEXqfJPbP2HNUaca9Y=
 github.com/spf13/cast v1.7.1/go.mod h1:ancEpBxwJDODSW/UG4rDrAqiKolqNNh2DX3mk86cAdo=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=

internal/app/delete_helper.go

@@ -0,0 +1,29 @@
+package app
+
+import (
+	tea "github.com/charmbracelet/bubbletea"
+	"github.com/programmersd21/kairo/internal/core"
+	"github.com/programmersd21/kairo/internal/history"
+)
+
+func (m *Model) deleteTasksCmd(ids []string) tea.Cmd {
+	return func() tea.Msg {
+		// Get the tasks before deleting them for history
+		var before []core.Task
+		for _, id := range ids {
+			if task, err := m.svc.GetByID(m.ctx, id); err == nil {
+				before = append(before, task)
+			}
+		}
+
+		if err := m.svc.DeleteTasks(m.ctx, ids); err != nil {
+			return errMsg{Err: err}
+		}
+
+		// Record deletion in history
+		op := history.CreateOperation(history.OpBulkDelete, "", ids, before, nil)
+		m.hist.Record(op)
+
+		return taskUpdatedMsg{}
+	}
+}