Create or update the feature specification from a natural language feature description.
Generates feature specifications from natural language descriptions with validation and quality checks.
/plugin marketplace add pleaseai/spec-kit-plugin/plugin install spec-kit@pleaseaicommands/$ARGUMENTS
You MUST consider the user input before proceeding (if not empty).
The text the user typed after /speckit.specify in the triggering message is the feature description. Assume you always have it available in this conversation even if $ARGUMENTS appears literally below. Do not ask the user to repeat it unless they provided an empty command.
Given that feature description, do this:
Generate a concise short name (2-4 words) for the branch:
Run the script .specify/scripts/bash/create-new-feature.sh --json "$ARGUMENTS" from repo root with the short-name argument and parse its JSON output for BRANCH_NAME and SPEC_FILE. All file paths must be absolute.
IMPORTANT:
.specify/scripts/bash/create-new-feature.sh --json "$ARGUMENTS" command with the 2-4 word short name you created in step 1--short-name "your-generated-short-name"-ShortName "your-generated-short-name"Load .specify/templates/spec-template.md to understand required sections.
Follow this execution flow:
Write the specification to SPEC_FILE using the template structure, replacing placeholders with concrete details derived from the feature description (arguments) while preserving section order and headings.
Specification Quality Validation: After writing the initial spec, validate it against quality criteria:
a. Create Spec Quality Checklist: Generate a checklist file at FEATURE_DIR/checklists/requirements.md using the checklist template structure with these validation items:
# Specification Quality Checklist: [FEATURE NAME]
**Purpose**: Validate specification completeness and quality before proceeding to planning
**Created**: [DATE]
**Feature**: [Link to spec.md]
## Content Quality
- [ ] No implementation details (languages, frameworks, APIs)
- [ ] Focused on user value and business needs
- [ ] Written for non-technical stakeholders
- [ ] All mandatory sections completed
## Requirement Completeness
- [ ] No [NEEDS CLARIFICATION] markers remain
- [ ] Requirements are testable and unambiguous
- [ ] Success criteria are measurable
- [ ] Success criteria are technology-agnostic (no implementation details)
- [ ] All acceptance scenarios are defined
- [ ] Edge cases are identified
- [ ] Scope is clearly bounded
- [ ] Dependencies and assumptions identified
## Feature Readiness
- [ ] All functional requirements have clear acceptance criteria
- [ ] User scenarios cover primary flows
- [ ] Feature meets measurable outcomes defined in Success Criteria
- [ ] No implementation details leak into specification
## Notes
- Items marked incomplete require spec updates before `/speckit.clarify` or `/speckit.plan`
b. Run Validation Check: Review the spec against each checklist item:
c. Handle Validation Results:
If all items pass: Mark checklist complete and proceed to step 6
If items fail (excluding [NEEDS CLARIFICATION]):
If [NEEDS CLARIFICATION] markers remain:
Extract all [NEEDS CLARIFICATION: ...] markers from the spec
LIMIT CHECK: If more than 3 markers exist, keep only the 3 most critical (by scope/security/UX impact) and make informed guesses for the rest
For each clarification needed (max 3), present options to user in this format:
## Question [N]: [Topic]
**Context**: [Quote relevant spec section]
**What we need to know**: [Specific question from NEEDS CLARIFICATION marker]
**Suggested Answers**:
| Option | Answer | Implications |
|--------|--------|--------------|
| A | [First suggested answer] | [What this means for the feature] |
| B | [Second suggested answer] | [What this means for the feature] |
| C | [Third suggested answer] | [What this means for the feature] |
| Custom | Provide your own answer | [Explain how to provide custom input] |
**Your choice**: _[Wait for user response]_
CRITICAL - Table Formatting: Ensure markdown tables are properly formatted:
| Content | not |Content||--------|Number questions sequentially (Q1, Q2, Q3 - max 3 total)
Present all questions together before waiting for responses
Wait for user to respond with their choices for all questions (e.g., "Q1: A, Q2: Custom - [details], Q3: B")
Update the spec by replacing each [NEEDS CLARIFICATION] marker with the user's selected or provided answer
Re-run validation after all clarifications are resolved
d. Update Checklist: After each validation iteration, update the checklist file with current pass/fail status
Report completion with branch name, spec file path, checklist results, and readiness for the next phase (/speckit.clarify or /speckit.plan).
NOTE: The script creates and checks out the new branch and initializes the spec file before writing.
When creating this spec from a user prompt:
Examples of reasonable defaults (don't ask about these):
Success criteria must be:
Good examples:
Bad examples (implementation-focused):