Copia – Copy Context for AI

中文 README

Stop hand-copying file paths and line numbers for your AI prompts! Copia turns any code, selection, symbol, or diagnostic into the AI-friendly context format your assistant actually wants — and lets you stage snippets across files into one bundle for richer prompts.

Built for the way you actually talk to Claude, Cursor, Copilot, and ChatGPT.

✨ Features

📋 Copy Anything in AI-Friendly Format

• Selection context: file: @/src/app.ts#L24:7-L24:15 plus a fenced code block with the right language tag.
• Path + line range: handy short references for "look at this region" prompts.
• Path-only / file name: classic copies, polished defaults (workspace-relative @/... prefix).
• Quick Copy Active Reference: one shortcut, your preferred mode (copia.quickCopyActiveMode).

🧠 Symbol-Aware Copy

• Copy Enclosing Symbol finds the smallest enclosing function / method / class / interface / module via VS Code's DocumentSymbolProvider and copies the entire symbol as a Copy Context block.
• Works for every language whose extension provides symbols — TypeScript / JavaScript / Markdown ship with VS Code; Python / Go / Rust / C++ / Java / etc. work the moment their language extension is installed.
• Falls back gracefully to the deepest containing symbol when no preferred kind matches (useful for Markdown headings, IaC, etc.).

🪢 Multi-File Bundle

• Copy Bundle packs multi-selected files (or the active editor) into a single AI-friendly block sequence — one file: @/... heading + fenced code block per file, separated by blank lines.
• Shares the same fence and copia.maxCodeLines truncation pipeline as Copy Context. Folders and binary resources are skipped silently.

🩺 Diagnostic Copy with Code

• Copy Diagnostic / Copy Diagnostic + Code — copy severity source(code): message plus the offending code, all behind one click on the diagnostic CodeLens or Quick Fix.
• When multiple diagnostics share a location, the disambig QuickPick offers a Copy all N diagnostics entry that bundles every diagnostic in one go.

🪄 Stage: Build Multi-Snippet Prompts Incrementally

The stage is an in-memory queue that accumulates selections, files, and symbols across the codebase before copying them as one big bundle. The killer feature when your AI prompt needs context from several places.

• Stage: Add Selection or File / Add Enclosing Symbol / Add File(s) to push.
• A $(layers) Copia +N status bar entry shows the count and opens the Manage panel.
• Stage: Copy All flushes everything as a single clipboard write, separated by blank lines.
• Stage: Manage lets you review, remove, copy, or clear items.

🎯 Configurable & Discoverable

• Selection actions surface as status bar entry (default), CodeLens, hover overlay, or off — your choice.
• Three fully customizable reference templates: single-line, line-range, char-range.
• Diagnostic CodeLens with severity filter (error / errorAndWarning / all).
• Code block truncation with copia.maxCodeLines (default 5; 0 disables).

🚀 Quick Start

1. Install Copia from the VS Code Marketplace.
2. Select some code in any file. A $(copy) Copia entry appears in the status bar — click it for a menu of all selection actions, or just right-click to use the Copia submenu.
3. Try Copy Context. The clipboard now contains the file reference plus a fenced code block, ready to paste into Claude / Cursor / Copilot / ChatGPT.
4. Want more context? Hit Stage: Add Selection or File, jump to another file, hit it again, then Stage: Copy All — both snippets land in the clipboard as one bundle.

That's the whole product. The rest is just polish.

🎬 Trigger Modes

Copia exposes its commands through every native VS Code surface so you never have to memorize a path:

🪄 Stage Workflow

The stage is the recommended way to compose AI prompts that need context from several places.

1. Push — Copia: Stage: Add Selection or File (or Add to Stage from the selection action menu) pushes the current selection / file. Use Stage: Add Enclosing Symbol to push the enclosing function / class, and Stage: Add File(s) from the Explorer context menu to push whole files.
2. Track — $(layers) Copia +N in the status bar updates with the count.
3. Flush — Copia: Stage: Copy All (or click the status bar entry and pick Copy Stage) copies everything as one bundle, separated by blank lines.
4. Manage — Copia: Stage: Manage lets you review items, remove entries one by one, or clear the queue.

The stage lives in memory only — reloading the window resets it.

📤 Output Formats

Copy Path + Lines uses this shape:

file: @/src/example.ts#L3-L5

Copy Path + Lines + Chars uses this shape:

file: @/src/example.ts#L3:1-L5:12

Copy Context and Copy Diagnostic + Code use this shape:

file: @/src/example.ts#L3:1-L5:12

const value = getValue();
console.log(value);

If the copied code is long, the extension only keeps the first 5 lines by default and appends a fold-style hint such as ... 85 more lines. You can change this with copia.maxCodeLines, or set it to 0 to disable truncation.

Copy Bundle joins one block per file with a blank line in between:

file: @/src/a.ts
```ts
export const a = 1;

file: @/src/b.ts

export const b = 2;

`Stage: Copy All` produces the same shape: each staged item is concatenated in insertion order, separated by blank lines.

## ⚙️ Settings

- `copia.maxCodeLines`
  Maximum number of lines kept in `Copy Context` and `Copy Diagnostic + Code`. Default: `5`. Set to `0` to disable truncation.
- `copia.pathStyle`
  Path rendering mode. Use `workspaceRelative` for relative paths and `@/` anchors, or `absolute` for full filesystem paths.
- `copia.padCopiedPathsWithSpaces`
  Add a leading and trailing space around copied path-like outputs. Default: `true`.
- `copia.padCopiedContextWithBlankLines`
  Add a blank line before and after copied context blocks such as `Copy Context` and `Copy Diagnostic + Code`. Default: `true`.
- `copia.selectionActionsUi`
  Control how selection actions are shown. Available values: `statusBar`, `codeLens`, `hover`, `off`.
  - `hover` shows no visible UI and reveals the action menu only when hovering inside the selection.
- `copia.enableDiagnosticCodeLens`
  Enable or disable diagnostic CodeLens shortcuts.
- `copia.showDiagnosticCodeLensMessage`
  Show or hide the shortened diagnostic message displayed to the right of `Copy Diagnostic`.
- `copia.diagnosticCodeLensSeverity`
  Control whether diagnostic CodeLens appears for `error`, `errorAndWarning`, or `all`.
- `copia.singleLineReferenceTemplate`
  Template for single-line references. Default: `file: ${pathRef}#L${startLine}`.
- `copia.lineRangeReferenceTemplate`
  Template for multi-line references. Default: `file: ${pathRef}#L${startLine}-L${endLine}`.
- `copia.charRangeReferenceTemplate`
  Template for character-range references. Default: `file: ${pathRef}#L${startLine}:${startColumn}-L${endLine}:${endColumn}`.
- `copia.quickCopyActiveMode`
  Controls what `Copia: Quick Copy Active Reference` copies. Available values: `singleLine`, `lineRange`, `charRange`, `context`.

Supported template variables:

- `${path}`
  Display path, for example `services/loopit/lite/templates/package.2d.json`
- `${pathRef}`
  AI-friendly path reference, for example `@/services/loopit/lite/templates/package.2d.json`
- `${startLine}` / `${endLine}`
  1-based line numbers
- `${startColumn}` / `${endColumn}`
  1-based columns
- `${startChar}` / `${endChar}`
  Alias of `${startColumn}` / `${endColumn}`

Template examples:

- Single line

```json
"copia.singleLineReferenceTemplate": "file: ${pathRef}#L${startLine}"

• Multi-line

"copia.lineRangeReferenceTemplate": "file: ${pathRef}#L${startLine}-L${endLine}"

• Character range

"copia.charRangeReferenceTemplate": "${pathRef}#L${startLine}:${startColumn}-L${endLine}:${endColumn}"

Full settings example:

{
  "copia.maxCodeLines": 5,
  "copia.pathStyle": "workspaceRelative",
  "copia.selectionActionsUi": "statusBar",
  "copia.enableDiagnosticCodeLens": true,
  "copia.diagnosticCodeLensSeverity": "errorAndWarning",
  "copia.singleLineReferenceTemplate": "file: ${pathRef}#L${startLine}",
  "copia.lineRangeReferenceTemplate": "file: ${pathRef}#L${startLine}-L${endLine}",
  "copia.charRangeReferenceTemplate": "file: ${pathRef}#L${startLine}:${startColumn}-L${endLine}:${endColumn}",
  "copia.quickCopyActiveMode": "lineRange"
}

✅ Validation Checklist

• Selection Select a single range and confirm the Copia status bar entry appears without shifting the editor. Toggle copia.selectionActionsUi through codeLens and hover and confirm each mode surfaces the actions as expected.
• Selection copy Run Copy Context and verify the output starts with file: @/...#Lx:y-Lx:y.
• Truncation Select more than 5 lines and verify the code block ends with ... N more lines.
• Relative path shortcut Press Option+L / Alt+L and verify it copies the current file's relative path.
• Path + lines shortcut Press Option+Command+L on macOS or Alt+Shift+L on Windows / Linux with a selection and verify it copies Path + Lines.
• Quick copy active reference Run Copia: Quick Copy Active Reference from the Command Palette, or assign your own shortcut, and verify the output matches copia.quickCopyActiveMode.
• Enclosing symbol Place the cursor inside a function / class in a TypeScript or Python file and run Copia: Copy Enclosing Symbol. Confirm the output is the entire function / class wrapped as a Copy Context block. In a file without a symbol provider, confirm Copia reports No enclosing symbol found instead of crashing.
• Diagnostics Put the cursor on a TypeScript or ESLint diagnostic and verify Copy Diagnostic works.
• Diagnostic with code Trigger Copy Diagnostic + Code and verify the code snippet is included.
• Explorer Right-click a file and a folder and verify Copy File Name, Copy Relative Path, and Copy Absolute Path.
• Explorer multiselect Multi-select resources and verify copied paths are line-separated.
• Bundle Multi-select 2-3 files in Explorer and run Copia: Copy Bundle. Confirm the clipboard contains one file: @/... heading + fenced code block per file, separated by blank lines, and that selected folders are skipped.
• Stage Run Stage: Add Selection or File in two different files, then Stage: Copy All, and confirm both entries appear in insertion order. Use Stage: Manage to remove one item and confirm the status bar count updates. Reload the window and confirm the stage is empty (memory only).
• SCM Right-click changed files in SCM and verify Copy File Name, Copy Relative Path, and Copy Absolute Path.

📌 Known Limits

• Multi-cursor / multi-selection copy is not supported yet (only the primary selection is used).
• The stage is in-memory only and resets when the window reloads.
• Copy Bundle skips folders and binary resources silently — it ships only readable files.
• Rich floating toolbars are not implemented; Copia uses VS Code-native entry points (status bar / CodeLens / hover / context menus / Quick Fix).

🛠️ Development

npm install
npm run compile
npm test

Then press F5 in VS Code to launch the extension host. Available scripts: npm: compile, npm: watch, npm: check, npm test.

🔗 More from sharten

• Linker – Smart Code Linking — turn any text in your code into a clickable link to docs, files, APIs, or tickets through simple JSON config.

Stop hand-copying paths and line numbers — let Copia ship clean context to your AI in one click. 🚀