seed-security-guidance

seed-security-guidance is a command for Claude Code from starter-series/create-starter. It costs 48 tokens per session (522 once invoked), scanned A, original, MIT.

A command that creates a starter `claude-security-guidance.md` file at a repository's root, based on the detected Starter Series template.

In plain words
What is it for?
It is for seeding repository-specific security instructions, reporting whether the file was created or already existed, and identifying the template used.
Why use it?
It provides a starting set of security guidance for Anthropic's Claude Code Security Guidance Plugin to use while code is written.

Command for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: mentions Claude Code.

Part of the create-starter plugin — 2 skills, 8 commands, 1 MCP server shipped together

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.

agentmods
npx agentmods add commands/starter-series/create-starter/seed-security-guidance
Clone the repo
git clone --depth 1 https://github.com/starter-series/create-starter

Made for: Claude Code.

Or install create-starter, the plugin that ships this one along with the rest of its 2 skills, 8 commands, 1 MCP server.

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 seed-security-guidance

README.md
[![agentmods](https://agentmods.dev/badge/commands/starter-series/create-starter/seed-security-guidance.svg)](https://agentmods.dev/commands/starter-series/create-starter/seed-security-guidance)
Your own site
<a href="https://agentmods.dev/commands/starter-series/create-starter/seed-security-guidance"><img src="https://agentmods.dev/badge/commands/starter-series/create-starter/seed-security-guidance.svg" alt="Measured on agentmods" height="20"></a>
Per session 48 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 522 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00048 $0.00522
Opus 5 $0.00024 $0.00261
Sonnet 5 $0.00010 $0.00104
Haiku 4.5 $0.00005 $0.00052

Measured 5d ago against content hash 633f6c0e6d76, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

seed-security-guidance 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.

.claude-plugin/commands/seed-security-guidance.md · 36 lines

What it actually says

You are seeding a starter claude-security-guidance.md so Anthropic's Claude Code Security Guidance Plugin can use it as an in-session guard while writing code.

Steps

  1. Call the seed_security_guidance MCP tool with path set to the absolute path of the repo. If no path is given, use the MCP server's cwd. Pass force: true only when the user explicitly asks to overwrite an existing file.

  2. Surface the report:

    • statuscreated (new file), exists (file present, no change), or overwritten (file was replaced because force: true).
    • matched starter — which Starter Series template informed the starter-specific section. null means the generic fallback section was used.
    • relative path — where the file landed (always claude-security-guidance.md at repo root for now).
  3. If status === "exists", tell the user the file is already in place; offer to re-run with --force only if they want the latest template.

  4. If status === "created" | "overwritten", suggest:

    • Read the generated file and edit any org-specific rules in the marked sections.
    • Commit via git add claude-security-guidance.md && git commit -m "chore(security): seed claude-security-guidance.md".
    • Re-run audit_security to confirm the claude-security-guidance check flips to PRESENT.

Positioning

This complements (does not replace):

  • claude-code-security-review GitHub Action — runs on every PR, AI review of diffs.
  • audit_security MCP tool — detects this file's presence as the 9th check.

The three together: in-session guard (this), post-PR review (claude-code-security-review), repo-level static audit (audit_security).

Do NOT

  • Pass force: true without explicit user confirmation — it overwrites any hand-edited rules.
  • Edit the file's content yourself from this command. Generate it via the MCP tool, then let the user edit.
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. 5d ago First seen · 36 lines · 48 tokens per session scan A 633f6c0e6d76

Subscribe to this mod's changes

seed-security-guidance is a command published in the GitHub repository starter-series/create-starter (2 stars, last pushed 4d ago), licensed MIT. It adds 48 tokens to every session and 522 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.