sdd-implement

sdd-implement is a skill for Claude Code from 3062-in-zamud/knowledgine. It costs 51 tokens per session (734 once invoked), scanned A, original, MIT.

A skill for implementing a software specification one task at a time while using TDD, or test-driven development: write a failing test, make it pass, then improve the code. It reads the requirements, design, and task files before starting.

In plain words
What is it for?
Use it after a specification is complete or when resuming an unfinished one, to implement its tasks in order and check each task with tests.
Why use it?
It keeps implementation aligned with the written specification and makes progress visible when work is new, interrupted, or handed over.

Skill for Claude Code

Written for Claude Code: $ARGUMENTS substitution. Also seen: mentions Claude Code; mentions AGENTS.md.

Good fit Use it after a specification is complete or when resuming an unfinished one, to implement its tasks in order and check each task with tests.

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Install with agentmods
npx agentmods add skills/3062-in-zamud/knowledgine/sdd-implement
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 3062-in-zamud/knowledgine --skill sdd-implement
Clone the repo
git clone --depth 1 https://github.com/3062-in-zamud/knowledgine

Made for: Claude Code.

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 sdd-implement

README.md
[![agentmods](https://agentmods.dev/badge/skills/3062-in-zamud/knowledgine/sdd-implement/github.svg)](https://agentmods.dev/skills/3062-in-zamud/knowledgine/sdd-implement)
Your own site
<a href="https://agentmods.dev/skills/3062-in-zamud/knowledgine/sdd-implement"><img src="https://agentmods.dev/badge/skills/3062-in-zamud/knowledgine/sdd-implement/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 sdd-implement

Your own site · 80×15
<a href="https://agentmods.dev/skills/3062-in-zamud/knowledgine/sdd-implement"><img src="https://agentmods.dev/badge/skills/3062-in-zamud/knowledgine/sdd-implement.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 51 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 734 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 $0.00051 $0.00734
Opus 5 $0.00026 $0.00367
Sonnet 5 $0.00010 $0.00147
Haiku 4.5 $0.00005 $0.00073

Measured 10d ago against content hash 050627ba5711, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

sdd-implement 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 10d 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.

.ai-agents/skills/sdd-implement/SKILL.md · 103 lines

How it starts

The opening of the file, as written. The whole thing — 103 lines — stays where its author put it; the contents beside it link to each section on GitHub.

sdd-implement

Purpose

Execute the implementation phase of SDD by following tasks.md systematically. Ensures each task is implemented with TDD discipline and spec compliance.

When to Use

  • After spec is complete (requirements.md + design.md + tasks.md finalized)
  • To resume implementation of a partially completed spec
  • When picking up implementation from a handoff report

Arguments

  • $ARGUMENTS: Spec ID (e.g., KNOW-001) or path to spec directory

Step-by-Step Instructions

1. Load Context

  1. Read the full spec:

    • specs/KNOW-{NNN}-*/requirements.md — acceptance criteria
    • specs/KNOW-{NNN}-*/design.md — architecture, interfaces
    • specs/KNOW-{NNN}-*/tasks.md — ordered task list
  2. Check current progress: which tasks are already checked off?

  3. If there's a handoff report, read it for additional context

2. For Each Unchecked Task

Execute the TDD cycle:

Red (Write failing test):

1. Read the task description and the relevant design.md section
2. Write a test that expresses the expected behavior
3. Run: pnpm test:run → confirm test FAILS

Green (Make it pass):

1. Write minimal code following design.md interfaces
2. Run: pnpm test:run → confirm test PASSES
3. Don't over-engineer; just satisfy the test

Refactor:

1. Clean up the implementation (if needed)
2. Run: pnpm verify → confirm everything still passes

Update Progress:

1. Check off the task in tasks.md: - [x] Task N
2. If the task was the last in a phase, run pnpm verify as a checkpoint

3. Handle Deviations

If during implementation you discover:

  • Missing task: Add it to tasks.md before implementing
  • Design needs change: Update design.md first, then implement
  • Requirement unclear: Check requirements.md; if still unclear, ask the user
  • Spec is wrong: Update the spec, then implement the correct version

4. Complete Implementation

After all tasks are checked off:

  1. Run pnpm verify one final time
  2. Run pnpm test:coverage to check coverage target (80%)
  3. Update spec status to review in requirements.md
  4. Create PR against develop with spec reference in description

Read the full file on GitHub · 103 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. 10d ago First seen · 103 lines · 51 tokens per session scan A 050627ba5711

Subscribe to this mod's changes

sdd-implement is a skill published in the GitHub repository 3062-in-zamud/knowledgine (3 stars, last pushed 1mo ago), licensed MIT. It adds 51 tokens to every session and 734 once invoked, about $0.0003 per session on Opus 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.