sdd-change

sdd-change is a skill for Claude Code, Codex from jsuvic/agent-profile. It costs 20 tokens per session (189 once invoked), scanned A, original, Apache-2.0.

A process for implementing a meaningful code change only after checking its approved specification. It covers requirements, non-goals, contracts, security rules, acceptance criteria, tests, and documentation.

In plain words
What is it for?
It helps plan and verify repository changes, add focused tests, run relevant checks, and report risks before implementation and review.
Why use it?
It prevents code from drifting beyond the agreed scope and exposes missing specifications, test gaps, and contract risks before changes are made.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

Good fit It helps plan and verify repository changes, add focused tests, run relevant checks, and report risks before implementation and review.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jsuvic/agent-profile/sdd-change
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 jsuvic/agent-profile --skill sdd-change
Clone the repo
git clone --depth 1 https://github.com/jsuvic/agent-profile

Made for: Claude Code, Codex.

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-change

README.md
[![agentmods](https://agentmods.dev/badge/skills/jsuvic/agent-profile/sdd-change.svg)](https://agentmods.dev/skills/jsuvic/agent-profile/sdd-change)
Your own site
<a href="https://agentmods.dev/skills/jsuvic/agent-profile/sdd-change"><img src="https://agentmods.dev/badge/skills/jsuvic/agent-profile/sdd-change.svg" alt="Measured on agentmods" height="20"></a>
Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 189 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 $0.00020 $0.00189
Opus 5 $0.00010 $0.00095
Sonnet 5 $0.00004 $0.00038
Haiku 4.5 $0.00002 $0.00019

Measured 7d ago against content hash 467a3b6dc751, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

sdd-change 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 7d 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.

.agents/skills/sdd-change/SKILL.md · 25 lines

What it actually says

SDD Change

Instructions

  1. Read the relevant spec in docs/specs/.
  2. Confirm the problem, goal, non-goals, contracts, security rules, acceptance criteria, tests, documentation updates, and final checklist.
  3. Do not implement behavior outside the approved spec.
  4. Add or update focused tests where practical before changing behavior.
  5. Run relevant tests and golden tests before final review.
  6. Report any missing spec, Draft spec, test gap, or contract risk before proceeding.

Safety

  • Do not upload source code.
  • Do not read or print secrets.
  • Ask before mutating files, running shell commands, installing dependencies, or using external network access.
  • Keep production access denied.
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. 7d ago First seen · 25 lines · 20 tokens per session scan A 467a3b6dc751

Subscribe to this mod's changes

sdd-change is a skill published in the GitHub repository jsuvic/agent-profile (3 stars, last pushed 4d ago), licensed Apache-2.0. It adds 20 tokens to every session and 189 once invoked, about $0.0001 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.

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