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DMontgomery40
efbb13827b
Documents 24 tools found in Claude.app binary (app.asar/index.js) that are not listed in the deferred tools system-reminder. Organized into 7 categories: - Widget Tools (2): inline SVG/HTML rendering via @ant/imagine-server - Preview Tools (13): dev server and browser preview in code tasks - Computer Use (1, 13 actions): desktop automation via screenshot-then-act - Terminal & Roots (2): IDE-plugin-only terminal reader and MCP roots - Office Add-in (5): Excel/Word/PowerPoint integration via Claude add-in - Conversation (1): internal compaction service, not user-callable - Feature Flags & Codenames: flags, codenames, Swift APIs, config keys Each tool includes verification status (CONFIRMED/NOT FOUND/UNTESTED), parameter schemas, and session-type availability matrix. Tone cleanup: removed speculative language per CLAUDE.md style guide. States facts from binary analysis, marks unverified claims explicitly.
166 lines
5.8 KiB
Markdown
166 lines
5.8 KiB
Markdown
# Preview Tools
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**Status:** CONFIRMED in Claude Desktop **code task sessions** (via `start_code_task` from Dispatch). Registered under `mcp__Claude_Preview__` namespace. Not available in Cowork task sessions, Dispatch orchestrator, or Claude Code CLI.
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**Total:** 13 tools
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**Verified:** 2026-03-19. `preview_start` successfully launched a Vite dev server (port 9322). `preview_list` returned `[]` when no servers running, then showed the running server. `preview_screenshot`, `preview_snapshot`, `preview_eval`, `preview_console_logs` all returned valid responses. Screenshot showed blank page due to misconfigured `launch.json` (not a tool issue).
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---
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## preview_start
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Start a dev server by name from `.claude/launch.json`. Reuses the server if already running.
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| Parameter | Type | Required | Description |
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|-----------|------|----------|-------------|
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| name | string | yes | Server name from .claude/launch.json |
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**Notes:** Tool description says "ALWAYS use this instead of Bash for running servers." Requires a `.claude/launch.json` config file in the project.
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---
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## preview_stop
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Stop a server started with `preview_start`.
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| Parameter | Type | Required | Description |
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|-----------|------|----------|-------------|
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| serverId | string | yes | Server ID to stop |
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---
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## preview_list
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List servers started with `preview_start`. Returns `serverId` values for use with other `preview_*` tools.
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No parameters.
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---
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## preview_logs
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Get server stdout/stderr output.
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| Parameter | Type | Required | Description |
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|-----------|------|----------|-------------|
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| serverId | string | yes | Server ID |
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| level | enum | no | "all" (default) or "error" (lines containing error/exception/failed/fatal) |
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| lines | number | no | Max lines to return (default 50) |
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| search | string | no | Filter for specific text |
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---
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## preview_console_logs
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Get browser console output (log, info, warn, error, debug).
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| Parameter | Type | Required | Description |
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|-----------|------|----------|-------------|
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| serverId | string | yes | Server ID |
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| level | enum | no | "all" (default), "error" (errors only), "warn" (warnings + errors) |
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| lines | number | no | Max lines to return (default 50, max 200) |
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---
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## preview_screenshot
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Take a screenshot of the page. Returns compressed JPEG.
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| Parameter | Type | Required | Description |
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|-----------|------|----------|-------------|
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| serverId | string | yes | Server ID |
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**Notes:** Tool description warns: "DO NOT rely on it for verifying colors, font sizes, or precise styles — use `preview_inspect` with specific CSS properties instead."
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---
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## preview_snapshot
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Get an accessibility tree snapshot of the page. Returns text content, roles, and element UIDs.
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| Parameter | Type | Required | Description |
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|-----------|------|----------|-------------|
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| serverId | string | yes | Server ID |
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**Notes:** "PREFERRED over screenshot for verifying text, element presence, and page structure." UIDs can be used with `preview_click` / `preview_fill`.
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---
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## preview_inspect
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Inspect a DOM element by CSS selector. Returns text content, className, tagName, id, computed styles, and bounding box.
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| Parameter | Type | Required | Description |
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|-----------|------|----------|-------------|
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| serverId | string | yes | Server ID |
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| selector | string | yes | CSS selector (e.g. '.button', '#header') |
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| styles | string[] | no | CSS properties to return (e.g. ['padding', 'color']). Defaults to common properties. |
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**Notes:** "BEST tool for verifying visual properties like colors, fonts, spacing, and dimensions — more accurate than screenshots."
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---
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## preview_click
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Click an element by CSS selector.
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| Parameter | Type | Required | Description |
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|-----------|------|----------|-------------|
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| serverId | string | yes | Server ID |
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| selector | string | yes | CSS selector (e.g. 'button.primary', '#submit', '[data-testid="btn"]') |
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| doubleClick | boolean | no | Perform a double-click |
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---
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## preview_fill
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Fill an input, textarea, or select element with a value.
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| Parameter | Type | Required | Description |
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|-----------|------|----------|-------------|
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| serverId | string | yes | Server ID |
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| selector | string | yes | CSS selector for the input element |
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| value | string | yes | Value to fill. For select elements, matches by value or text. |
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---
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## preview_eval
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Execute JavaScript in the preview page. For debugging and inspection only.
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| Parameter | Type | Required | Description |
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|-----------|------|----------|-------------|
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| serverId | string | yes | Server ID |
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| expression | string | yes | JavaScript expression to evaluate in page context. Return value is sent back. |
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**Notes:** "Do NOT use this to implement UI changes the user requests — edit the source code instead. Any DOM modifications via eval are temporary and lost on reload. Wrap multi-step logic in an IIFE."
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---
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## preview_network
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List network requests or inspect a specific response body.
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| Parameter | Type | Required | Description |
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|-----------|------|----------|-------------|
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| serverId | string | yes | Server ID |
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| filter | enum | no | "all" (default) or "failed" (4xx/5xx and network errors). Ignored when `requestId` provided. |
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| requestId | string | no | If provided, returns full response body for that request. |
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**Notes:** Without `requestId`, lists all requests with URL, method, status, and `requestId`. With `requestId`, returns the full response body.
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---
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## preview_resize
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Resize the preview viewport for responsive layout testing.
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| Parameter | Type | Required | Description |
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|-----------|------|----------|-------------|
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| serverId | string | yes | Server ID |
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| preset | enum | no | "mobile" (375x812), "tablet" (768x1024), "desktop" (1280x800). Overrides width/height. |
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| width | number | no | Viewport width in pixels |
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| height | number | no | Viewport height in pixels |
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| colorScheme | string | no | Color scheme emulation for dark mode testing |
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