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.
npx agentmods add skills/johnfreeman13592-lab/skill-dna-compiler/safe-code-changenpx skills add johnfreeman13592-lab/skill-dna-compiler --skill safe-code-changegit clone --depth 1 https://github.com/johnfreeman13592-lab/skill-dna-compilerWrote 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.
[](https://agentmods.dev/skills/johnfreeman13592-lab/skill-dna-compiler/safe-code-change)<a href="https://agentmods.dev/skills/johnfreeman13592-lab/skill-dna-compiler/safe-code-change"><img src="https://agentmods.dev/badge/skills/johnfreeman13592-lab/skill-dna-compiler/safe-code-change.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00037 | $0.00199 |
| Opus 5 | $0.00018 | $0.00100 |
| Sonnet 5 | $0.00007 | $0.00040 |
| Haiku 4.5 | $0.00004 | $0.00020 |
Grade A, and why
safe-code-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 5d 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.
What it actually says
Safe Code Change
Principles
- Inspect before editing
- Reuse existing implementation before adding files
Workflow
- Inspect the README, architecture, and current implementation
- Make the smallest relevant change
- Run focused checks, then the full test suite and lint
Constraints
- Run focused tests before full verification
- Do not report completion while required checks fail
Do not use when
- Only answering a read-only question
Source references
<DOCUMENT_ID>— Direct instruction to inspect existing project contextBefore changing code, inspect the README, architecture, and existing implementation.
<DOCUMENT_ID>— Direct instruction to verify changes before completionThen run the full test suite and lint before reporting completion.
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.
- 5d ago First seen · 34 lines · 37 tokens per session scan A f51079e65a4e
safe-code-change is a skill published in the GitHub repository johnfreeman13592-lab/skill-dna-compiler (2 stars, last pushed 1mo ago), licensed MPL-2.0. It adds 37 tokens to every session and 199 once invoked, about $0.0002 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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