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---
name: gsd:spike
description: Spike an idea through experiential exploration, or propose what to spike next (frontier mode)
argument-hint: "[idea to validate] [--quick] [--text] or [frontier]"
allowed-tools:
- Read
- Write
- Edit
- Bash
- Grep
- Glob
- AskUserQuestion
- WebSearch
- WebFetch
- mcp__context7__resolve-library-id
- mcp__context7__query-docs
---
<objective>
Spike an idea through experiential exploration — build focused experiments to feel the pieces
of a future app, validate feasibility, and produce verified knowledge for the real build.
Spikes live in `.planning/spikes/` and integrate with GSD commit patterns, state tracking,
and handoff workflows.
Two modes:
- **Idea mode** (default) — describe an idea to spike
- **Frontier mode** (no argument or "frontier") — analyzes existing spike landscape and proposes integration and frontier spikes
Does not require `/gsd:new-project` — auto-creates `.planning/spikes/` if needed.
</objective>
<execution_context>
@${CLAUDE_PLUGIN_ROOT}/workflows/spike.md
@${CLAUDE_PLUGIN_ROOT}/references/ui-brand.md
</execution_context>
<runtime_note>
**Copilot (VS Code):** Use `vscode_askquestions` wherever this workflow calls `AskUserQuestion`.
</runtime_note>
<context>
Idea: $ARGUMENTS
**Available flags:**
- `--quick` — Skip decomposition/alignment, jump straight to building. Use when you already know what to spike.
- `--text` — Use plain-text numbered lists instead of AskUserQuestion (for non-Claude runtimes).
</context>
<process>
Execute the spike workflow from @${CLAUDE_PLUGIN_ROOT}/workflows/spike.md end-to-end.
Preserve all workflow gates (prior spike check, decomposition, research, risk ordering, observability assessment, verification, MANIFEST updates, commit patterns).
</process>
