dogwood: Skill for Claude Code

.claude/skills/authoring-action-schema/SKILL.md

authoring-action-schema is a skill for Claude Code from dogwood-policy/dogwood. It costs 190 tokens per session (3,270 once invoked), scanned A, original, Apache-2.0.

A way to define the actions and data types governed by a Dogwood deployment in a Cedar schema file. Cedar is a language for describing access-control rules.

In plain words
What is it for?
Use it to model users or services, resources, and tool operations, either by writing the schema or generating it from an MCP tools/list description, then check it with the Dogwood command-line tool.
Why use it?
It creates the structure that later access policies use to describe who can perform which operations on which resources.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: reads .claude/ paths.

This is dogwood-policy/dogwood's own configuration. It tells Claude Code how to work on dogwood itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything dogwood configures →

Part of the dogwood plugin — 4 skills shipped together

Reuse

Borrowing it

Nothing to install: this file belongs to dogwood-policy/dogwood. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/dogwood-policy/dogwood/main/.claude/skills/authoring-action-schema/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/dogwood-policy/dogwood

Made for: Claude Code.

Or install dogwood, the plugin that ships this one along with the rest of its 4 skills.

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 authoring-action-schema

README.md
[![agentmods](https://agentmods.dev/badge/skills/dogwood-policy/dogwood/authoring-action-schema/github.svg)](https://agentmods.dev/skills/dogwood-policy/dogwood/authoring-action-schema)
Your own site
<a href="https://agentmods.dev/skills/dogwood-policy/dogwood/authoring-action-schema"><img src="https://agentmods.dev/badge/skills/dogwood-policy/dogwood/authoring-action-schema/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 authoring-action-schema

Your own site · 80×15
<a href="https://agentmods.dev/skills/dogwood-policy/dogwood/authoring-action-schema"><img src="https://agentmods.dev/badge/skills/dogwood-policy/dogwood/authoring-action-schema.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 190 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,270 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00190 $0.03270
Opus 5 $0.00095 $0.01635
Sonnet 5 $0.00038 $0.00654
Haiku 4.5 $0.00019 $0.00327

Measured 13d ago against content hash 66bffbf8a719, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

authoring-action-schema 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 13d 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/skills/authoring-action-schema/SKILL.md · 251 lines

How it starts

The opening of the file, as written. The whole thing — 251 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Authoring the Cedar action schema for a Dogwood deployment

Your job: produce the action schema — a Cedar .cedarschema — that declares the world a Dogwood deployment governs: its entity types (the principals and resources), one action per tool/operation, and each action's context laid out as input / output / system. This schema is the foundation every policy scopes over, so it comes first in the lifecycle: an action schema is required before you declare a service schema and before you write any policy.

This is a modeling task. The syntax is plain Cedar and fully documented (see Ground truth) — the hard part is deciding what your world looks like: which entities are principals vs resources, what counts as one action, and which fields belong under input vs output vs system. You also choose how to produce the file: hand-write it, or generate it from an MCP tools/list manifest.

Do not invent Cedar schema syntax from memory, and do not return a schema you have not checked with the dogwood CLI. Follow the loop below in order:

  1. Decide the shape — resolve the modeling questions, and pick hand-write vs MCP-generate (Step 1).
  2. Author or generate the .cedarschema (Step 2).
  3. Check it — run dogwood schema action and fix until it exits 0; this is mandatory (Step 3).
  4. Hand off — present the schema and point at the next lifecycle skill (Step 4).

The ground truth (read before authoring)

The action schema is standard Cedar .cedarschema — Dogwood adds no schema syntax, only a convention for the context record. Treat these docs as authoritative; do not guess. Paths are relative to this skill directory (.claude/skills/authoring-action-schema/); the guide lives in the dogwood-docs crate:

Read the full file on GitHub · 251 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. 13d ago First seen · 251 lines · 190 tokens per session scan A 66bffbf8a719

Subscribe to this mod's changes

authoring-action-schema is a skill published in the GitHub repository dogwood-policy/dogwood (384 stars, last pushed today), licensed Apache-2.0. It adds 190 tokens to every session and 3,270 once invoked, about $0.0010 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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