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feat(init): support extension install during initialization #2180

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feat(init): support extension install during initialization
officialasishkumar Apr 11, 2026
4ddb1cb
fix(init): harden extension archive downloads
officialasishkumar Apr 12, 2026
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24 changes: 16 additions & 8 deletions README.md
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Expand Up @@ -298,6 +298,7 @@ Community projects that extend, visualize, or build on Spec Kit:
- **[SpecKit Companion](https://marketplace.visualstudio.com/items?itemName=alfredoperez.speckit-companion)** — A VS Code extension that brings a visual GUI to Spec Kit. Browse specs in a rich markdown viewer with clickable file references, create specifications with image attachments, comment and refine each step inline (GitHub-style review), track your progress through the SDD workflow with a visual phase stepper, and manage steering documents like constitutions and templates.

## 🤖 Supported AI Agents

| Agent | Support | Notes |
| ------------------------------------------------------------------------------------ | ------- | ----------------------------------------------------------------------------------------------------------------------------------------- |
| [Qoder CLI](https://qoder.com/cli) | ✅ | |
Expand Down Expand Up @@ -333,7 +334,7 @@ Community projects that extend, visualize, or build on Spec Kit:

After running `specify init`, your AI coding agent will have access to these slash commands for structured development. If you pass `--ai <agent> --ai-skills`, Spec Kit installs agent skills instead of slash-command prompt files; `--ai-skills` requires `--ai`.

#### Core Commands
### Core Commands

Essential commands for the Spec-Driven Development workflow:

Expand All @@ -346,7 +347,7 @@ Essential commands for the Spec-Driven Development workflow:
| `/speckit.taskstoissues` | `speckit-taskstoissues`| Convert generated task lists into GitHub issues for tracking and execution |
| `/speckit.implement` | `speckit-implement` | Execute all tasks to build the feature according to the plan |

#### Optional Commands
### Optional Commands

Additional commands for enhanced quality and validation:

Expand Down Expand Up @@ -386,17 +387,21 @@ specify init [PROJECT_NAME] <OPTIONS>
| Argument/Option | Type | Description |
| ---------------------- | -------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `<PROJECT_NAME>` | Argument | Name for your new project directory (optional if using `--here`, or use `.` for current directory) |
| `--ai` | Option | AI assistant to use (see `AGENT_CONFIG` for the full, up-to-date list). Common options include: `claude`, `gemini`, `copilot`, `cursor-agent`, `qwen`, `opencode`, `codex`, `windsurf`, `junie`, `kilocode`, `auggie`, `roo`, `codebuddy`, `amp`, `shai`, `kiro-cli` (`kiro` alias), `agy`, `bob`, `qodercli`, `vibe`, `kimi`, `iflow`, `pi`, `forge`, or `generic` (requires `--ai-commands-dir`) |
| `--ai-commands-dir` | Option | Directory for agent command files (required with `--ai generic`, e.g. `.myagent/commands/`) |
| `--integration` | Option | Integration to use. Common options include: `claude`, `gemini`, `copilot`, `cursor-agent`, `qwen`, `opencode`, `codex`, `windsurf`, `junie`, `kilocode`, `auggie`, `roo`, `codebuddy`, `amp`, `shai`, `kiro-cli`, `agy`, `bob`, `qodercli`, `vibe`, `kimi`, `iflow`, `pi`, `forge`, or `generic` |
| `--integration-options`| Option | Options passed to the selected integration, such as `--integration-options="--commands-dir .myagent/commands/"` for `generic` |
| `--ai` | Option | Deprecated legacy alias for `--integration` |
| `--ai-commands-dir` | Option | Deprecated legacy option for generic command directories. Use `--integration generic --integration-options="--commands-dir <dir>"` instead |
| `--script` | Option | Script variant to use: `sh` (bash/zsh) or `ps` (PowerShell) |
| `--ignore-agent-tools` | Flag | Skip checks for AI agent tools like Claude Code |
| `--no-git` | Flag | Skip git repository initialization |
| `--no-git` | Flag | Deprecated. Skip git repository initialization and default git-extension installation |
| `--here` | Flag | Initialize project in the current directory instead of creating a new one |
| `--force` | Flag | Force merge/overwrite when initializing in current directory (skip confirmation) |
| `--skip-tls` | Flag | Skip SSL/TLS verification (not recommended) |
| `--debug` | Flag | Enable detailed debug output for troubleshooting |
| `--github-token` | Option | GitHub token for API requests (or set GH_TOKEN/GITHUB_TOKEN env variable) |
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Copilot AI Apr 13, 2026

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The init options table describes --skip-tls, --debug, and --github-token as active behaviors, but in the CLI they are marked as deprecated no-ops and hidden. The README should match current behavior (either remove these options from the table or mark them as deprecated/no-op).

Suggested change
| `--skip-tls` | Flag | Skip SSL/TLS verification (not recommended) |
| `--debug` | Flag | Enable detailed debug output for troubleshooting |
| `--github-token` | Option | GitHub token for API requests (or set GH_TOKEN/GITHUB_TOKEN env variable) |
| `--skip-tls` | Flag | Deprecated no-op retained for compatibility; SSL/TLS verification behavior is unaffected |
| `--debug` | Flag | Deprecated no-op retained for compatibility; does not enable additional debug output |
| `--github-token` | Option | Deprecated no-op retained for compatibility; does not affect initialization behavior |

Copilot uses AI. Check for mistakes.
| `--ai-skills` | Flag | Install Prompt.MD templates as agent skills in agent-specific `skills/` directory (requires `--ai`). Extension commands are also auto-registered as skills when extensions are added later. |
| `--ai-skills` | Flag | Deprecated legacy option for integrations that support skills. Skills are now selected by the integration. |
| `--extension` | Option | Install an extension during initialization. Repeatable; accepts bundled IDs, local paths, or archive URLs. |
| `--preset` | Option | Install a preset during initialization |
| `--branch-numbering` | Option | Branch numbering strategy: `sequential` (default — `001`, `002`, `003`, …, `1000`, … — expands beyond 3 digits automatically) or `timestamp` (`YYYYMMDD-HHMMSS`). Timestamp mode is useful for distributed teams to avoid numbering conflicts |

### Examples
Expand All @@ -406,10 +411,13 @@ specify init [PROJECT_NAME] <OPTIONS>
specify init my-project

# Initialize with specific AI assistant
specify init my-project --ai claude
specify init my-project --integration claude

# Install a bundled extension during initialization
specify init my-project --integration copilot --extension git

# Initialize with Cursor support
specify init my-project --ai cursor-agent
specify init my-project --integration cursor-agent

# Initialize with Qoder support
specify init my-project --ai qodercli
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