Open a file in VS Code and highlight specific lines without any explanation bubble. Use when the user asks to show, open, jump to, or point at specific code with no commentary needed. Do NOT use when you need to explain what the code does — use the walkthrough tool with a step that includes an explanation. Do NOT use for multi-step tours — use walkthrough with multiple steps. Line numbers are 1-based; character offsets are 0-based.

Show, explain, and tour code in VS Code — the one tool for all code presentation with commentary, from single inline explanations to multi-step narrated tours. Use when the user asks to explain code, walk through code, tour a codebase, ask 'how does this work', navigate an active tour, clear bubbles, or check walkthrough state. Do NOT use for jumping to code without commentary — use show_code instead. Dispatches by arguments: one step with explanation shows an inline markdown bubble (single-step explain); one step WITHOUT explanation highlights only (same as show_code); multiple steps start a narrated tour; action: 'clear' removes all bubbles; action in {'next','prev','goto','stop','pause','resume'} navigates an active tour (pass step index for goto); no arguments returns current status. Proper usage for multi-point steps: keep explanation to 1–2 intro sentences and put each point in its own highlights[] entry with its own line range and narration — the teleprompter UX (selection moving with the voice, bubble text building up) depends on this pattern. Cramming multiple points into one long explanation breaks both the audio flow and the visual sync. Never use numbered lists (1. 2.) in explanations or narrations — TTS reads them as 'one dot… two dot' and it's painful. Markdown: real newlines for paragraphs, NOT literal backslash-n; avoid ## headers — use bold instead. Uses global voice/bubble/autoplay settings from the settings tool.

View or update global walkthrough settings — voice narration on/off, explanation bubbles on/off, autoplay on/off, and autoplay delay. Use when the user asks to enable, disable, or configure any of those, mute/unmute narration, toggle bubbles, or check current settings. Do NOT use to change the narration voice name — use walkthrough_voice_selection for that. Call with no arguments to read current settings. Changes persist across sessions.

Change the narration voice, preview how it sounds, list available voices, or audition voices back-to-back. Use when the user asks to change the voice, try a different voice, hear voice options, compare voices, or asks 'what voices are available'. Do NOT use to toggle voice on/off — use the settings tool for that. Pass voice to switch to a specific voice and hear a sample. Pass list: true to list voices without playing audio. Pass audition: true to play voices back-to-back for comparison. Filter with locale (e.g. 'en-US', 'en', 'de') and gender. Voice selection persists across sessions.

Get the code the user has selected or highlighted in VS Code — returns file path, line range, and selected text. Use when the user refers to 'this code', 'what I've selected', 'the highlighted block', or before calling walkthrough/show_code when the user has already selected the code they want to discuss. Returns an empty selection object when nothing is highlighted.