Bubbletea

What it does

When your agent uses it

• Creating TUI apps with the Elm architecture
• Dual-pane layouts
• Accordion modes
• Mouse/keyboard handling

Example prompts

• “/bubbletea”

Workflow steps

3 steps, taken from the step headings in SKILL.md.

1. 1Calculate Available Space
2. 2Use Weight-Based Panel Sizing
3. 3Truncate Text to Prevent Wrapping

What it can do on your machine

Read from SKILL.md and the folder at commit 3115397. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  No scripts in the folder and no shell commands in SKILL.md (its code samples are go and yaml).

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  Links to these hosts (documentation or services it may open):

  • github.com
  • charm.sh

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Bubbletea loads about 2.3k tokens when it runs, and up to ~14k if it reads all its reference files. Until then it costs about 85 tokens; SKILL.md has 599 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~85

When it runs · the whole SKILL.md, loaded when a task matches

~2.3k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~14k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from devantler-tech/ksail at commit 3115397, republished under its MIT licence (© devantler-tech). 599 words, ~2,274 tokens.

name

bubbletea

description

Build terminal user interfaces with Go and Bubbletea framework. Use for creating TUI apps with the Elm architecture, dual-pane layouts, accordion modes, mouse/keyboard handling, Lipgloss styling, and reusable components. Includes production-ready templates, effects library, and battle-tested layout patterns from real projects.

license

MIT

metadata.github-path

.claude/skills/bubbletea

metadata.github-ref

refs/tags/v1.0.3

metadata.github-repo

https://github.com/ggprompts/tfe

metadata.github-tree-sha

b3dceb6065a02f1960f92483d9f44a1c2e4e36aa

metadata.internal

true

your-app/
├── main.go              # Entry point (minimal, ~21 lines)
├── types.go             # Type definitions, structs, enums
├── model.go             # Model initialization & layout calculation
├── update.go            # Message dispatcher
├── update_keyboard.go   # Keyboard handling
├── update_mouse.go      # Mouse handling
├── view.go              # View rendering & layouts
├── styles.go            # Lipgloss style definitions
├── config.go            # Configuration management
└── .claude/skills/bubbletea/  # This skill (bundled)

func (m model) calculateLayout() (int, int) {
    contentWidth := m.width
    contentHeight := m.height

    // Subtract UI elements
    if m.config.UI.ShowTitle {
        contentHeight -= 3  // title bar (3 lines)
    }
    if m.config.UI.ShowStatus {
        contentHeight -= 1  // status bar
    }

    // CRITICAL: Account for panel borders
    contentHeight -= 2  // top + bottom borders

    return contentWidth, contentHeight
}

// Calculate weights based on focus/accordion mode
leftWeight, rightWeight := 1, 1
if m.accordionMode && m.focusedPanel == "left" {
    leftWeight = 2  // Focused panel gets 2x weight
}

// Calculate actual widths from weights
totalWeight := leftWeight + rightWeight
leftWidth := (availableWidth * leftWeight) / totalWeight
rightWidth := availableWidth - leftWidth

// Calculate max text width to prevent wrapping
maxTextWidth := panelWidth - 4  // -2 borders, -2 padding

// Truncate ALL text before rendering
title = truncateString(title, maxTextWidth)
subtitle = truncateString(subtitle, maxTextWidth)

func truncateString(s string, maxLen int) string {
    if len(s) <= maxLen {
        return s
    }
    return s[:maxLen-1] + "…"
}

func (m model) handleLeftClick(msg tea.MouseMsg) (tea.Model, tea.Cmd) {
    if m.shouldUseVerticalStack() {
        // Vertical stack mode: use Y coordinates
        topHeight, _ := m.calculateVerticalStackLayout()
        relY := msg.Y - contentStartY

        if relY < topHeight {
            m.focusedPanel = "left"  // Top panel
        } else {
            m.focusedPanel = "right" // Bottom panel
        }
    } else {
        // Side-by-side mode: use X coordinates
        leftWidth, _ := m.calculateDualPaneLayout()

        if msg.X < leftWidth {
            m.focusedPanel = "left"
        } else {
            m.focusedPanel = "right"
        }
    }

    return m, nil
}

// BAD: Can cause misalignment
panelStyle := lipgloss.NewStyle().
    Border(border).
    Height(height)  // Don't do this!

// GOOD: Fill content lines to exact height
for len(lines) < innerHeight {
    lines = append(lines, "")
}
panelStyle := lipgloss.NewStyle().Border(border)

theme: "dark"
keybindings: "default"

layout:
  type: "dual_pane"
  split_ratio: 0.5
  accordion_mode: true

ui:
  show_title: true
  show_status: true
  mouse_enabled: true
  show_icons: true

github.com/charmbracelet/bubbletea
github.com/charmbracelet/lipgloss
github.com/charmbracelet/bubbles
gopkg.in/yaml.v3

github.com/charmbracelet/glamour       # Markdown rendering
github.com/charmbracelet/huh           # Forms
github.com/alecthomas/chroma/v2        # Syntax highlighting
github.com/evertras/bubble-table       # Interactive tables
github.com/koki-develop/go-fzf         # Fuzzy finder

© devantler-tech, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 4 other files (references) in .agents/skills/bubbletea of devantler-tech/ksail.

• SKILL.md
• references/components.md
• references/emoji-width-fix.md
• references/golden-rules.md
• references/troubleshooting.md

Open the folder on GitHubat commit 3115397