Spec Kit Implement Skill

When to Use

The plan and tasks are complete and you are ready to implement.

Inputs

```
specs/<feature>/tasks.md
```
and
```
plan.md
```

Optional artifacts:

data-model.md

contracts/

research.md

quickstart.md

User constraints (e.g., scope, testing expectations)

If tasks are missing or incomplete, ask the user to run speckit-tasks first.

Workflow

Run
```
.specify/scripts/bash/check-prerequisites.sh --json --require-tasks --include-tasks
```
from repo root and parse FEATURE_DIR and AVAILABLE_DOCS list. All paths must be absolute. For single quotes in args like "I'm Groot", use escape syntax: e.g 'I'''m Groot' (or double-quote if possible: "I'm Groot").
Check checklists status (if FEATURE_DIR/checklists/ exists):
- Scan all checklist files in the checklists/ directory
- For each checklist, count:
  - Total items: All lines matching
    - [ ]
    or
    - [X]
    or
    - [x]
  - Completed items: Lines matching
    - [X]
    or
    - [x]
  - Incomplete items: Lines matching
    - [ ]
- Create a status table:
  text
```
| Checklist | Total | Completed | Incomplete | Status |
|-----------|-------|-----------|------------|--------|
| ux.md     | 12    | 12        | 0          | ✓ PASS |
| test.md   | 8     | 5         | 3          | ✗ FAIL |
| security.md | 6   | 6         | 0          | ✓ PASS |
```
- Calculate overall status:
  - PASS: All checklists have 0 incomplete items
  - FAIL: One or more checklists have incomplete items
- If any checklist is incomplete:
  - Display the table with incomplete item counts
  - STOP and ask: "Some checklists are incomplete. Do you want to proceed with implementation anyway? (yes/no)"
  - Wait for user response before continuing
  - If user says "no" or "wait" or "stop", halt execution
  - If user says "yes" or "proceed" or "continue", proceed to step 3
- If all checklists are complete:
  - Display the table showing all checklists passed
  - Automatically proceed to step 3
Load and analyze the implementation context:
- REQUIRED: Read tasks.md for the complete task list and execution plan
- REQUIRED: Read plan.md for tech stack, architecture, and file structure
- IF EXISTS: Read data-model.md for entities and relationships
- IF EXISTS: Read contracts/ for API specifications and test requirements
- IF EXISTS: Read research.md for technical decisions and constraints
- IF EXISTS: Read quickstart.md for integration scenarios
Project Setup Verification:
- REQUIRED: Create/verify ignore files based on actual project setup:
Detection & Creation Logic:
- Check if the following command succeeds to determine if the repository is a git repo (create/verify .gitignore if so):
  sh
```
git rev-parse --git-dir 2>/dev/null
```
- Check if Dockerfile* exists or Docker in plan.md → create/verify .dockerignore
- Check if .eslintrc* exists → create/verify .eslintignore
- Check if eslint.config.* exists → ensure the config's
  ignores
  entries cover required patterns
- Check if .prettierrc* exists → create/verify .prettierignore
- Check if .npmrc or package.json exists → create/verify .npmignore (if publishing)
- Check if terraform files (*.tf) exist → create/verify .terraformignore
- Check if .helmignore needed (helm charts present) → create/verify .helmignore
If ignore file already exists: Verify it contains essential patterns, append missing critical patterns only If ignore file missing: Create with full pattern set for detected technology

Common Patterns by Technology (from plan.md tech stack):
- Node.js/JavaScript/TypeScript:
```
node_modules/
```
  ,
```
dist/
```
  ,
```
build/
```
  ,
```
*.log
```
  ,
```
.env*
```
- Python:
```
__pycache__/
```
  ,
```
*.pyc
```
  ,
```
.venv/
```
  ,
```
venv/
```
  ,
```
dist/
```
  ,
```
*.egg-info/
```
- Java:
```
target/
```
  ,
```
*.class
```
  ,
```
*.jar
```
  ,
```
.gradle/
```
  ,
```
build/
```
- C#/.NET:
```
bin/
```
  ,
```
obj/
```
  ,
```
*.user
```
  ,
```
*.suo
```
  ,
```
packages/
```
- Go:
```
*.exe
```
  ,
```
*.test
```
  ,
```
vendor/
```
  ,
```
*.out
```
- Ruby:
```
.bundle/
```
  ,
```
log/
```
  ,
```
tmp/
```
  ,
```
*.gem
```
  ,
```
vendor/bundle/
```
- PHP:
```
vendor/
```
  ,
```
*.log
```
  ,
```
*.cache
```
  ,
```
*.env
```
- Rust:
```
target/
```
  ,
```
debug/
```
  ,
```
release/
```
  ,
```
*.rs.bk
```
  ,
```
*.rlib
```
  ,
```
*.prof*
```
  ,
```
.idea/
```
  ,
```
*.log
```
  ,
```
.env*
```
- Kotlin:
```
build/
```
  ,
```
out/
```
  ,
```
.gradle/
```
  ,
```
.idea/
```
  ,
```
*.class
```
  ,
```
*.jar
```
  ,
```
*.iml
```
  ,
```
*.log
```
  ,
```
.env*
```
- C++:
```
build/
```
  ,
```
bin/
```
  ,
```
obj/
```
  ,
```
out/
```
  ,
```
*.o
```
  ,
```
*.so
```
  ,
```
*.a
```
  ,
```
*.exe
```
  ,
```
*.dll
```
  ,
```
.idea/
```
  ,
```
*.log
```
  ,
```
.env*
```
- C:
```
build/
```
  ,
```
bin/
```
  ,
```
obj/
```
  ,
```
out/
```
  ,
```
*.o
```
  ,
```
*.a
```
  ,
```
*.so
```
  ,
```
*.exe
```
  ,
```
Makefile
```
  ,
```
config.log
```
  ,
```
.idea/
```
  ,
```
*.log
```
  ,
```
.env*
```
- Swift:
```
.build/
```
  ,
```
DerivedData/
```
  ,
```
*.swiftpm/
```
  ,
```
Packages/
```
- R:
```
.Rproj.user/
```
  ,
```
.Rhistory
```
  ,
```
.RData
```
  ,
```
.Ruserdata
```
  ,
```
*.Rproj
```
  ,
```
packrat/
```
  ,
```
renv/
```
- Universal:
```
.DS_Store
```
  ,
```
Thumbs.db
```
  ,
```
*.tmp
```
  ,
```
*.swp
```
  ,
```
.vscode/
```
  ,
```
.idea/
```
Tool-Specific Patterns:
- Docker:
```
node_modules/
```
  ,
```
.git/
```
  ,
```
Dockerfile*
```
  ,
```
.dockerignore
```
  ,
```
*.log*
```
  ,
```
.env*
```
  ,
```
coverage/
```
- ESLint:
```
node_modules/
```
  ,
```
dist/
```
  ,
```
build/
```
  ,
```
coverage/
```
  ,
```
*.min.js
```
- Prettier:
```
node_modules/
```
  ,
```
dist/
```
  ,
```
build/
```
  ,
```
coverage/
```
  ,
```
package-lock.json
```
  ,
```
yarn.lock
```
  ,
```
pnpm-lock.yaml
```
- Terraform:
```
.terraform/
```
  ,
```
*.tfstate*
```
  ,
```
*.tfvars
```
  ,
```
.terraform.lock.hcl
```
- Kubernetes/k8s:
```
*.secret.yaml
```
  ,
```
secrets/
```
  ,
```
.kube/
```
  ,
```
kubeconfig*
```
  ,
```
*.key
```
  ,
```
*.crt
```
Parse tasks.md structure and extract:
- Task phases: Setup, Tests, Core, Integration, Polish
- Task dependencies: Sequential vs parallel execution rules
- Task details: ID, description, file paths, parallel markers [P]
- Execution flow: Order and dependency requirements
Execute implementation following the task plan:
- Phase-by-phase execution: Complete each phase before moving to the next
- Respect dependencies: Run sequential tasks in order, parallel tasks [P] can run together
- Follow TDD approach: Execute test tasks before their corresponding implementation tasks
- File-based coordination: Tasks affecting the same files must run sequentially
- Validation checkpoints: Verify each phase completion before proceeding
Implementation execution rules:
- Setup first: Initialize project structure, dependencies, configuration
- Tests before code: If you need to write tests for contracts, entities, and integration scenarios
- Core development: Implement models, services, CLI commands, endpoints
- Integration work: Database connections, middleware, logging, external services
- Polish and validation: Unit tests, performance optimization, documentation
Progress tracking and error handling:
- Report progress after each completed task
- Halt execution if any non-parallel task fails
- For parallel tasks [P], continue with successful tasks, report failed ones
- Provide clear error messages with context for debugging
- Suggest next steps if implementation cannot proceed
- IMPORTANT For completed tasks, make sure to mark the task off as [X] in the tasks file.
Completion validation:
- Verify all required tasks are completed
- Check that implemented features match the original specification
- Validate that tests pass and coverage meets requirements
- Confirm the implementation follows the technical plan
- Report final status with summary of completed work

Note: This skill assumes a complete task breakdown exists in tasks.md. If tasks are incomplete or missing, suggest running speckit-tasks first to regenerate the task list.

Outputs

Implementation changes in the codebase
Updated
```
specs/<feature>/tasks.md
```
with completed tasks checked off

Any generated/updated ignore files (e.g.,

.gitignore

.dockerignore

.eslintignore

.prettierignore

)

speckit-implement

NPX Install

Tags

SKILL.md Content

Spec Kit Implement Skill

When to Use

Inputs

Workflow

Outputs