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 skills add snyk/studio-recipes --skill secure-at-inceptiongit clone --depth 1 https://github.com/snyk/studio-recipesWrote 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/snyk/studio-recipes/secure-at-inception)<a href="https://agentmods.dev/skills/snyk/studio-recipes/secure-at-inception"><img src="https://agentmods.dev/badge/skills/snyk/studio-recipes/secure-at-inception/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.
<a href="https://agentmods.dev/skills/snyk/studio-recipes/secure-at-inception"><img src="https://agentmods.dev/badge/skills/snyk/studio-recipes/secure-at-inception.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00106 | $0.02037 |
| Opus 5 | $0.00053 | $0.01019 |
| Sonnet 5 | $0.00021 | $0.00407 |
| Haiku 4.5 | $0.00011 | $0.00204 |
Grade A, and why
secure-at-inception 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 9d 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.
How it starts
The opening of the file, as written. The whole thing — 199 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Secure At Inception
Proactively scan all newly generated or modified code to prevent security vulnerabilities before they enter the codebase. Provides intelligent scanning decisions, caching, and filtering to focus only on NEW issues.
File Type → Scan Type Reference
| Scan Type | Trigger Files | MCP Tool |
|---|---|---|
| SAST (Code) | Source files: .js, .ts, .py, .java, .go, .rb, .php, .cs, .swift, .kt, .scala, .rs, .c, .cpp, .dart, and more |
snyk_code_scan |
| SCA (Dependencies) | Manifests: package.json, requirements.txt, pom.xml, build.gradle, Gemfile, go.mod, Cargo.toml, *.csproj, composer.json, and more |
snyk_sca_scan |
| IaC | Infrastructure: .tf, .tfvars, K8s YAML (with apiVersion/kind), template.json/.yaml, ARM JSON, serverless.yml |
snyk_iac_scan |
Skip: binary files, non-IaC JSON/YAML, documentation (.md, .txt, .rst), assets, test fixtures.
Phase 1: Change Detection
Step 1.1: Gather Changed Files
Check for changes using one of these methods (in order of preference):
- Git diff (if in a git repo):
git diff --name-only HEAD git diff --name-only --cached # staged files git status --porcelain - Session context: Track files created/modified during the current session
- User-specified path: If user provides a specific file or directory
Step 1.2: Categorize Files by Scan Type
Use the File Type → Scan Type Reference table above to map each changed file to the appropriate scan. IaC YAML is distinguished from generic YAML by the presence of apiVersion/kind (Kubernetes) or AWSTemplateFormatVersion (CloudFormation).
Phase 2: Execute Scans
Run SAST, SCA, and IaC scans in parallel — they are independent of each other. Use the parameters below for each applicable scan type (determined by the File Type → Scan Type Reference table).
Step 2.1: SAST Scan (snyk_code_scan)
path: directory containing changed source files (or project root); scan each file individually if < 5 files changed, otherwise scan the parent directoryseverity_threshold:"medium"(default) or as configured
What ships with it
2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 9d ago First seen · 199 lines · 106 tokens per session scan A 3ec4ef136109
secure-at-inception is a skill published in the GitHub repository snyk/studio-recipes (62 stars, last pushed 6d ago), licensed Apache-2.0. It adds 106 tokens to every session and 2,037 once invoked, about $0.0005 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 2026-08-30.
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