github-spec-kit/workflows

Workflows

Workflows are multi-step, resumable automation pipelines defined in YAML. They orchestrate Spec Kit commands across integrations, evaluate control flow, and pause at human review gates — enabling end-to-end Spec-Driven Development cycles without manual step-by-step invocation.

How It Works

A workflow definition declares a sequence of steps. The engine executes them in order, dispatching commands to AI integrations, running shell commands, evaluating conditions for branching, and pausing at gates for human review. State is persisted after each step, so workflows can be resumed after interruption.

steps:
  - id: specify
    command: speckit.specify
    input:
      args: "{{ inputs.spec }}"

  - id: review
    type: gate
    message: "Review the spec before planning."
    options: [approve, reject]
    on_reject: abort

  - id: plan
    command: speckit.plan

For detailed architecture and internals, see ARCHITECTURE.md.

Quick Start

# Search available workflows
specify workflow search

# Install the built-in SDD workflow
specify workflow add speckit

# Or run directly from a local YAML file
specify workflow run ./workflow.yml --input spec="Build a user authentication system with OAuth support"

# Run an installed workflow with inputs
specify workflow run speckit --input spec="Build a user authentication system with OAuth support"

# Check run status
specify workflow status

# Resume after a gate pause
specify workflow resume <run_id>

# Get detailed workflow info
specify workflow info speckit

# Remove a workflow
specify workflow remove speckit

Running Workflows

From an Installed Workflow

specify workflow add speckit
specify workflow run speckit --input spec="Build a user authentication system with OAuth support"

From a Local YAML File

specify workflow run ./my-workflow.yml --input spec="Build a user authentication system with OAuth support"

Multiple Inputs

specify workflow run speckit \
  --input spec="Build a user authentication system with OAuth support" \
  --input scope="backend-only"

Step Types

Workflows support 10 built-in step types:

Command Steps (default)

Invoke an installed Spec Kit command by name via the integration CLI:

- id: specify
  command: speckit.specify
  input:
    args: "{{ inputs.spec }}"
  integration: claude        # Optional: override workflow default
  model: "claude-sonnet-4-20250514"   # Optional: override model

Prompt Steps

Send an arbitrary inline prompt to an integration CLI (no command file needed):

- id: security-review
  type: prompt
  prompt: "Review {{ inputs.file }} for security vulnerabilities"
  integration: claude

Shell Steps

Run a shell command and capture output:

- id: run-tests
  type: shell
  run: "cd {{ inputs.project_dir }} && npm test"

Gate Steps

Pause for human review. The workflow resumes when specify workflow resume is called:

- id: review-spec
  type: gate
  message: "Review the generated spec before planning."
  options: [approve, edit, reject]
  on_reject: abort

If/Then/Else Steps

Conditional branching based on an expression:

- id: check-scope
  type: if
  condition: "{{ inputs.scope == 'full' }}"
  then:
    - id: full-plan
      command: speckit.plan
  else:
    - id: quick-plan
      command: speckit.plan
      options:
        quick: true

Switch Steps

Multi-branch dispatch on an expression value:

- id: route
  type: switch
  expression: "{{ steps.review.output.choice }}"
  cases:
    approve:
      - id: plan
        command: speckit.plan
    reject:
      - id: log
        type: shell
        run: "echo 'Rejected'"
  default:
    - id: fallback
      type: gate
      message: "Unexpected choice"

While Loop Steps

Repeat steps while a condition is truthy:

- id: retry
  type: while
  condition: "{{ steps.run-tests.output.exit_code != 0 }}"
  max_iterations: 5
  steps:
    - id: fix
      command: speckit.implement

Do-While Loop Steps

Execute steps at least once, then repeat while condition holds:

- id: refine
  type: do-while
  condition: "{{ steps.review.output.choice == 'edit' }}"
  max_iterations: 3
  steps:
    - id: revise
      command: speckit.specify

Fan-Out Steps

Dispatch a step template for each item in a collection (sequential):

- id: parallel-impl
  type: fan-out
  items: "{{ steps.tasks.output.task_list }}"
  max_concurrency: 3
  step:
    id: impl
    command: speckit.implement

Fan-In Steps

Aggregate results from fan-out steps:

- id: collect
  type: fan-in
  wait_for: [parallel-impl]
  output: {}

Error Handling

By default, any step that returns StepResult(status=StepStatus.FAILED, ...) at runtime halts the entire run — most commonly a shell or command step exiting non-zero. Set continue_on_error: true on a step to record its result and continue to the next sibling step instead. When the failure was a non-zero exit, the exit code remains available on steps.<id>.output.exit_code so a downstream if or switch can branch on it (or a gate can surface it to the operator via {{ }} interpolation in message):

- id: heavy-thing
  type: command
  integration: claude
  command: speckit.heavy-thing
  continue_on_error: true

- id: check-result
  type: if
  condition: "{{ steps.heavy-thing.output.exit_code != 0 }}"
  then:
    - id: review
      type: gate
      message: "Step failed (exit {{ steps.heavy-thing.output.exit_code }}). Approve to run the recovery path, or reject to leave the failure recorded and move on."
      on_reject: skip
    - id: recover
      type: if
      condition: "{{ steps.review.output.choice == 'approve' }}"
      then:
        - id: rerun
          command: speckit.recovery
  else:
    - id: next-thing
      command: speckit.next-thing

A few things worth knowing about that example:

• Both gate options (approve, reject) return StepStatus.COMPLETED; on_reject: skip controls only whether the engine aborts on reject (it doesn't, with skip) — it does not auto-skip subsequent sibling steps in the then: list. Downstream branching is the workflow author's responsibility: read {{ steps.<gate-id>.output.choice }} in a follow-up if, switch, or expression, as the recover step above does.
• on_reject has three values: abort (default — reject → StepStatus.FAILED with output.aborted = True, halts the run), skip (reject → StepStatus.COMPLETED, author handles branching as shown), and retry (reject → StepStatus.PAUSED so the next specify workflow resume re-runs the gate).
• Gates do not automatically re-run the failed step. To express a retry path, either define custom gate options and branch on the choice downstream, or wrap the failing step in your own loop.

Notes:

• The field must be a literal boolean (true / false); coerced strings like "true" are rejected at validation time.
• Scope: returned failures only. The flag applies to step results with status=StepStatus.FAILED. Unhandled exceptions raised out of a step's execute() method are caught one level up by WorkflowEngine.execute(), logged as workflow_failed, and abort the run regardless of continue_on_error. If a step author wants the flag to cover an exceptional path, the step must catch the exception internally and return StepResult(status=StepStatus.FAILED, ...) with the failure encoded in output (e.g. exit_code, stderr, or a custom field).
• Gate aborts (on_reject: abort chosen by the operator) always halt the run — continue_on_error does not override them. The flag is for transient/expected step failures, not for overriding deliberate operator decisions.
• Structural validation runs up-front: specify workflow run rejects invalid workflow definitions before the run is created, so validation failures never reach this code path.
• When the flag is omitted, behaviour is byte-equivalent to before this feature.

Expressions

Workflow definitions use {{ expression }} syntax for dynamic values:

# Access inputs
args: "{{ inputs.spec }}"

# Access previous step outputs
args: "{{ steps.specify.output.file }}"

# Comparisons
condition: "{{ steps.run-tests.output.exit_code != 0 }}"

# Filters
message: "{{ status | default('pending') }}"

Supported filters: default, join, contains, map.

Runtime Context

{{ context.* }} exposes engine-managed runtime metadata for the current run:

Variable	Description
context.run_id	The current workflow run id (the same value Spec Kit prints as Run ID: at the end of workflow run). Auto-generated runs are 8-character hex from uuid4; operator-supplied ids may be any alphanumeric string with hyphens or underscores. Empty string outside a run context.

# Stamp telemetry events with the run id for cross-system join.
- id: emit-event
  type: shell
  run: 'echo "{\"run_id\":\"{{ context.run_id }}\",\"event\":\"started\"}" >> events.jsonl'

# Per-run scratch directory.
- id: prep-scratch
  type: shell
  run: 'mkdir -p /tmp/run-{{ context.run_id }}'

# Pass run id into a command for artifact metadata.
- id: tag-artifact
  command: speckit.specify
  input:
    args: "{{ context.run_id }}"

Input Types

Workflow inputs are type-checked and coerced from CLI string values:

inputs:
  spec:
    type: string
    required: true
    prompt: "Describe what you want to build"
  task_count:
    type: number
    default: 5
  dry_run:
    type: boolean
    default: false
  scope:
    type: string
    default: "full"
    enum: ["full", "backend-only", "frontend-only"]

Type	Accepts	Example
string	Any string	"user-auth"
number	Numeric strings → int/float	"42" → 42
boolean	true/1/yes → True, false/0/no → False	"true" → True

State and Resume

Every workflow run persists state to .specify/workflows/runs/<run_id>/:

# List all runs with status
specify workflow status

# Check a specific run
specify workflow status <run_id>

# Resume a paused run (after approving a gate)
specify workflow resume <run_id>

# Resume a failed run (retries from the failed step)
specify workflow resume <run_id>

Run states: created → running → completed | paused | failed | aborted

Catalog Management

Workflows are discovered through catalogs. By default, Spec Kit uses the official and community catalogs:

Note

Community workflows are independently created and maintained by their respective authors. GitHub and the Spec Kit maintainers may review pull requests that add entries to the community catalog for formatting and structure, but they do not review, audit, endorse, or support the workflow definitions themselves. Review workflow source before installation and use at your own discretion.

# List active catalogs
specify workflow catalog list

# Add a custom catalog
specify workflow catalog add https://example.com/catalog.json --name my-org

# Remove a catalog
specify workflow catalog remove <index>

Creating a Workflow

1. Create a workflow.yml following the schema above
2. Test locally with specify workflow run ./workflow.yml --input key=value
3. Verify with specify workflow info ./workflow.yml
4. See PUBLISHING.md to submit to the catalog

Environment Variables

Variable	Description
SPECKIT_WORKFLOW_CATALOG_URL	Override the catalog URL (replaces all defaults)

Configuration Files

File	Scope	Description
.specify/workflow-catalogs.yml	Project	Custom catalog stack for this project
~/.specify/workflow-catalogs.yml	User	Custom catalog stack for all projects

Repository Layout

workflows/
├── ARCHITECTURE.md                         # Internal architecture documentation
├── PUBLISHING.md                           # Guide for submitting workflows to the catalog
├── README.md                               # This file
├── catalog.json                            # Official workflow catalog
├── catalog.community.json                  # Community workflow catalog
└── speckit/                                # Built-in SDD cycle workflow
    └── workflow.yml