Speckit Implement

User Input

$ARGUMENTS

You MUST consider the user input before proceeding (if not empty).

Pre-Execution Checks

Check for extension hooks (before implementation):

• Check if .specify/extensions.yml exists in the project root.
• If it exists, read it and look for entries under the hooks.before_implement key
• If the YAML cannot be parsed or is invalid, skip hook checking silently and continue normally
• Filter out hooks where enabled is explicitly false. Treat hooks without an enabled field as enabled by default.
• For each remaining hook, do not attempt to interpret or evaluate hook condition expressions:
• If the hook has no condition field, or it is null/empty, treat the hook as executable
• If the hook defines a non-empty condition, skip the hook and leave condition evaluation to the HookExecutor implementation
• When constructing slash commands from hook command names, replace dots (.) with hyphens (-). For example, speckit.git.commit → /speckit-git-commit.
• For each executable hook, output the following based on its optional flag:
• Optional hook (optional: true):

``` ## Extension Hooks

Optional Pre-Hook: {extension} Command: /{command} Description: {description}

Prompt: {prompt} To execute: /{command} ```

• Mandatory hook (optional: false):

``` ## Extension Hooks

Automatic Pre-Hook: {extension} Executing: /{command} EXECUTE_COMMAND: {command}

Wait for the result of the hook command before proceeding to the Outline. ```

• If no hooks are registered or .specify/extensions.yml does not exist, skip silently

Outline

1. Run .specify/scripts/bash/check-prerequisites.sh --json --require-tasks --include-tasks from repo root and parse FEATUREDIR and AVAILABLEDOCS 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").

1. 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

1. 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 .specify/memory/constitution.md for governance constraints
• IF EXISTS: Read quickstart.md for integration scenarios

1. 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, *.dll, autom4te.cache/, config.status, 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

1. 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

1. 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

1. 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

1. 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.

1. 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 command 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.

1. Check for extension hooks: After completion validation, check if .specify/extensions.yml exists in the project root.

• If it exists, read it and look for entries under the hooks.after_implement key
• If the YAML cannot be parsed or is invalid, skip hook checking silently and continue normally
• Filter out hooks where enabled is explicitly false. Treat hooks without an enabled field as enabled by default.
• For each remaining hook, do not attempt to interpret or evaluate hook condition expressions:
• If the hook has no condition field, or it is null/empty, treat the hook as executable
• If the hook defines a non-empty condition, skip the hook and leave condition evaluation to the HookExecutor implementation
• When constructing slash commands from hook command names, replace dots (.) with hyphens (-). For example, speckit.git.commit → /speckit-git-commit.
• For each executable hook, output the following based on its optional flag:
• Optional hook (optional: true):

``` ## Extension Hooks

Optional Hook: {extension} Command: /{command} Description: {description}

Prompt: {prompt} To execute: /{command} ```

• Mandatory hook (optional: false):

``` ## Extension Hooks

Automatic Hook: {extension} Executing: /{command} EXECUTE_COMMAND: {command} ```

• If no hooks are registered or .specify/extensions.yml does not exist, skip silently

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: merllinsbeard
• Source: merllinsbeard/merlin-skills
• License: MIT

Install and usage instructions live in the source repository linked above.