spec-driven-implementation

spec-driven-implementation is a skill for Claude Code from xbklairith/kisune. It costs 46 tokens per session (2,061 once invoked), scanned A, original, MIT.

An implementation workflow that follows an existing specification step by step. It supports a quick mode based on `plan.md` and a full mode based on `tasks.md`, with verification during the work.

In plain words
What is it for?
Use it to implement a planned feature or carry out test-driven development tasks; TDD means writing tests as part of guiding the implementation.
Why use it?
It reduces the chance of skipping planned requirements or finishing without checking the result.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the dev-workflow plugin — 28 skills, 1 command, 8 agents, 1 hook, 1 plugin shipped together

Good fit Use it to implement a planned feature or carry out test-driven development tasks; TDD means writing tests as part of guiding the implementation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/xbklairith/kisune/spec-driven-implementation
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add xbklairith/kisune --skill spec-driven-implementation
Clone the repo
git clone --depth 1 https://github.com/xbklairith/kisune

Made for: Claude Code.

Or install dev-workflow, the plugin that ships this one along with the rest of its 28 skills, 1 command, 8 agents, 1 hook, 1 plugin.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for spec-driven-implementation

README.md
[![agentmods](https://agentmods.dev/badge/skills/xbklairith/kisune/spec-driven-implementation/github.svg)](https://agentmods.dev/skills/xbklairith/kisune/spec-driven-implementation)
Your own site
<a href="https://agentmods.dev/skills/xbklairith/kisune/spec-driven-implementation"><img src="https://agentmods.dev/badge/skills/xbklairith/kisune/spec-driven-implementation/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for spec-driven-implementation

Your own site · 80×15
<a href="https://agentmods.dev/skills/xbklairith/kisune/spec-driven-implementation"><img src="https://agentmods.dev/badge/skills/xbklairith/kisune/spec-driven-implementation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,061 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00046 $0.02061
Opus 5.5 $0.00018 $0.00824
Sonnet 5.5 $0.00009 $0.00412
Haiku 4.5 $0.00005 $0.00206

Measured 8d ago against content hash 431aaf0be24c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

spec-driven-implementation scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

dev-workflow/skills/spec-driven-implementation/SKILL.md · 185 lines

How it starts

The opening of the file, as written. The whole thing — 185 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Spec-Driven Implementation Skill

Purpose

Execute the planning artifacts produced by spec-driven-planning. The skill auto-detects which mode the feature is in and runs the matching playbook:

  • Quick mode (plan.md exists) — follow bite-sized steps, run verification commands, commit. No RED-GREEN-REFACTOR. Tests welcome but not mandated.
  • Full mode (tasks.md exists) — strict TDD per task: RED → GREEN → REFACTOR, traceability to REQ-### IDs, quality gates between tasks.

Activation Triggers

  • User says "implement this feature", "let's code this", "execute the plan"
  • User mentions "tasks", "TDD", or "execution"
  • User uses /dev-workflow:spec with tasks or execute
  • Planning phase is complete

Mode Detection (DO THIS FIRST)

Before doing anything, find the active feature folder and detect mode:

1. ls docx/features/  →  pick most recent or user-named feature
2. Inside docx/features/[NN-name]/, look for:
   - plan.md only                          → QUICK MODE
   - tasks.md only                         → FULL MODE
   - tasks.md + plan.archived.md           → FULL MODE (post-upgrade; archive is informational, ignored for routing)
   - plan.md + tasks.md (no archive)       → STOP AND ASK: ambiguous state.
                                              Likely a hand-conversion in progress.
                                              Ask user which file is authoritative.
                                              Do NOT auto-pick — risk of clobbering.
   - neither                               → ERROR: "No plan/spec found. Run /dev-workflow:spec first."

plan.archived.md is informational only and never affects mode detection — a clean post-upgrade state has tasks.md + plan.archived.md and routes to Full.

Announce the mode:

"Detected [Quick/Full] mode from docx/features/[NN-name]/[plan.md|tasks.md]. Running [Quick/Full] execution."

Then run the matching section below.


Quick Mode Execution

Source: docx/features/[NN-name]/plan.md

Read the full file on GitHub · 185 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 8d ago Changed 431aaf0be24c
  2. 10d ago Changed · -167 lines 0ad9839b04e5
  3. 1mo ago First seen · 352 lines · 46 tokens per session scan A 3060183b9446

Subscribe to this mod's changes

spec-driven-implementation is a skill published in the GitHub repository xbklairith/kisune (3 stars, last pushed 8d ago), licensed MIT. It adds 46 tokens to every session and 2,061 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.