> **spec_generator** — chapter 19 of 23 in [google-gemini/gemini-cli](https://skillsdocs.com/google-gemini/gemini-cli).
>
> Book (all chapters, one file): https://skillsdocs.com/google-gemini/gemini-cli.md
> Machine manifest: https://skillsdocs.com/google-gemini/gemini-cli/.well-known/agent-skills/index.json
> Install the book: `npx skills add google-gemini/gemini-cli`
> Upstream: https://github.com/google-gemini/gemini-cli/blob/main/tools/caretaker-agent/cloudrun/triage-worker/.gemini/skills/spec_generator/SKILL.md @ `main`
> Raw bytes, no header: https://raw.githubusercontent.com/google-gemini/gemini-cli/main/tools/caretaker-agent/cloudrun/triage-worker/.gemini/skills/spec_generator/SKILL.md
> Base for relative paths: https://raw.githubusercontent.com/google-gemini/gemini-cli/main/tools/caretaker-agent/cloudrun/triage-worker/.gemini/skills/spec_generator/
> Licence: Apache-2.0 — https://spdx.org/licenses/Apache-2.0.html
>
> Content © its authors, served unmodified. Takedown: https://github.com/DreambaseAI/skillsdocs/issues/new?labels=takedown&title=Takedown+request

<!-- Verbatim upstream SKILL.md follows, YAML frontmatter included. -->

---
name: spec_generator
description: Generates a structured Workable Spec JSON to guide a Developer Worker.
---

# Spec Generator Instructions
Extract key technical details from the issue and organize them according to the following strict JSON schema.

### Critical Rules:
1. **Codebase Verification:** Rely on file paths and locations found during your codebase exploration. Ensure all files mentioned in `files_to_modify` actually exist in the repository. Do not make up file paths.
2. **Target File Selection:** List all source code files in `files_to_modify` where code changes belong.
   - Fix config or state issues early at their setup/hook entrypoint rather than refactoring low-level utilities.
   - Strictly do NOT list test files or files that were only inspected without requiring code changes.
3. **Strict JSON Escaping:** Ensure the generated output is standard, valid JSON. In JSON string values (such as summary fields or verification steps), do NOT escape single quotes with backslashes. Write them directly as `'` (not `\\'`).

> [!IMPORTANT]
> The output MUST strictly adhere to this schema. Deviations (like putting objects inside arrays instead of strings) will break the downstream automated code generation pipeline.

The final `workable_spec` object must conform strictly to this JSON Schema specification. Every field listed below is strictly required and must be populated:
```json
{
  "type": "object",
  "properties": {
    "issue_id": {
      "type": "string",
      "description": "The specific GitHub issue identifier in the canonical format: {owner}/{repo}#{number} (e.g., google/gemini-cli#245)."
    },
    "summary": {
      "type": "object",
      "description": "A deep technical summary of the issue.",
      "properties": {
        "problem": {
          "type": "string",
          "description": "Concise statement of the problem."
        },
        "root_cause": {
          "type": "string",
          "description": "Analysis of the underlying cause of the bug."
        },
        "context": {
          "type": "string",
          "description": "Any additional technical context or background."
        }
      }
    },
    "implementation_plan": {
      "type": "object",
      "description": "Details required for code implementation of the fix.",
      "properties": {
        "files_to_modify": {
          "type": "array",
          "description": "List of source code files requiring changes relative to the repository root (e.g. ['src/cli.ts']). Strictly do NOT include test files (*.test.ts, *.spec.ts) here; test files must go into testing_strategy.test_file.",
          "items": {
            "type": "string"
          }
        },
        "steps": {
          "type": "array",
          "description": "Ordered step-by-step instructions to implement the fix. Each step must be a simple, flat string description. Do not nest objects inside this array.",
          "items": {
            "type": "string"
          }
        }
      }
    },
    "testing_strategy": {
      "type": "object",
      "description": "Instructions for validating the fix.",
      "properties": {
        "test_file": {
          "type": "string",
          "description": "Path to the relevant test file relative to the repository root (e.g., 'tests/cli.test.ts')."
        },
        "expected_behavior": {
          "type": "string",
          "description": "Description of how the system should behave after the fix."
        },
        "verification_steps": {
          "type": "array",
          "description": "Specific steps to add or modify in the test file.",
          "items": {
            "type": "string"
          }
        },
        "framework": {
          "type": "string",
          "description": "Testing framework used.",
          "enum": ["Vitest", "N/A"]
        }
      }
    }
  }
}
```


Do not include any metadata like spam assessment or effort tags in this spec. Keep it focused entirely on instructions for code generation and testing.