spec-driven-dev

name	spec-driven-dev
description	Spec-driven dev workflow. Invoke before implementing any feature or fixing any bug — spec lookup, clarifications, plan approval.

Spec-Driven Development Workflow

Step 1: Spec Lookup

Check for an existing spec:

• PRs: docs/specs/history/prs/YYYY-MM/PR-<number>.md
• Bugs: docs/specs/bugs/ledger.md
• Baseline: docs/specs/baseline/<capability>/

If no spec exists, tell the user and create one from the template at docs/specs/templates/pr-spec.md.

Step 2: Ambiguity Check

Evaluate the request:

• Expected behavior is defined with concrete inputs/outputs
• Error cases and edge cases are specified
• Scope is clear — which files change, which don't
• There is only one reasonable implementation approach

If ANY box is unchecked, ask clarifying questions before proceeding.

Step 3: Clarifying Questions

Group your questions:

Behavior: What should happen when X? What's the output for Y? Scope: Should this affect Z? Is this limited to one component? Architecture: New agent tool or extend existing? DB migration needed? Testing: What assertions prove this works?

Step 4: Define Behavior Changes

Create BHV-AREA-NNN entries in the spec file:

• AREA = category code (AGENT, AUTH, IDE, CONN, ADS, PPC, BILLING, WS, ONBOARD, REPORT, MCP, SEC, UI, INFRA, CREATIVE)
• NNN = sequential number within that area
• Fill in Before / After columns
• Set Status to UNVERIFIED initially

Step 5: Architecture Diagram Check

Check if this change affects system architecture:

• Does it add a new service or component?
• Does it change data flow between existing components?
• Does it modify database relationships?
• Does it add a new integration path?

If yes, check docs/specs/architecture/ for a relevant diagram. Update it or create a new one using docs/specs/templates/architecture-diagram.md.

Existing diagrams:

• system-context.md — top-level service map
• agent-lifecycle.md — agent state machine
• auth-flows.md — login and signup paths
• conn-oauth-flow.md — platform OAuth sequence
• billing-credit-flow.md — credit allocation and consumption
• ws-multitenancy.md — workspace isolation ER diagram
• ads-campaign-creation.md — campaign creation flow
• mcp-transport.md — MCP server transport architecture

Step 6: Implementation Plan

Present:

• Files to create or modify (with paths)
• Expected behavior after implementation
• What will NOT change
• Diagrams to update (if any)
• Test plan

Wait for explicit approval before writing code.

Step 7: Implement and Update Spec

After coding:

1. Update Status column: UNVERIFIED → MATCH or MISMATCH
2. Add test evidence to the spec
3. Update docs/specs/bugs/ledger.md if bugs were found or fixed
4. Update architecture diagrams if data flow changed
5. Stage all spec files with your code: git add docs/specs/...

If the user says "just do it" or "skip the spec"

Say: "I want to build exactly what you need. Two quick questions to make sure I get it right." Then ask only the most critical clarification questions.

---

About this skill

Part of the Synter free skills collection — open-source agent skills for advertising, PPC, and marketing automation.

Want this skill (and 40+ more) running on autopilot against your live ad accounts? Try Synter — AI Agent Media Buyers that connect to Google, Meta, LinkedIn, TikTok, Reddit, Amazon, and 7+ more platforms.

• 🌐 syntermedia.ai
• 📚 All free skills
• 💬 Built by @syntermedia — questions? Open an issue.