synthesis-agent-guardrails SKILL.md skillA
synthesis-agent-guardrails from synthesisengineering/synthesis-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add synthesisengineering/synthesis-skills/synthesis-agent-guardrails@v2.3.2Pins v2.3.2 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- synthesisengineering/synthesis-skills
- Path
skills/synthesis-agent-guardrails/SKILL.md- Versions recorded
- 14
- Latest version
- v2.3.2, committed Nov 2, 2026
- First version recorded
- Sep 22, 2026
- Size
- 6,152 bytes
- Repository stars
- 23
- License
- Apache-2.0
Pre-tool guards beyond sends: the account a calendar or mail call acts as, a browser call's Chrome profile, deploys and their date rules, destructive commands; the reply check and day-end provenance scan. Use to configure them, or when a deploy, delete, calendar or browser call is blocked.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Synthesis Agent Guardrails Agent harnesses act through the principal's accounts and shells: calendar invites go out as someone, a push publishes a site, a delete removes a home folder. A rule written in the instructions is necessary and demonstrably insufficient, because rules on disk go unread at the moment of acting. These guards sit before the tool call, in the v5 PreToolUse hook (`synthesis/guards.py`), and two checks sit at the end of a turn and of a day. ## Binding rules 1. **A calendar, mail or sharing call acts as the account of the workspace it runs in.** An invitation cannot be unsent (2026-09-11). Reads and Slack sends are never routed; session-to-session messages have no account to cross. 2. **A production deploy needs the principal's approval of that exact command,** typed by them as `approve <code>`, bound to the commit HEAD is at, used once, within 15 minutes. A deploy is a build deploy (`wrangler pages deploy` and the like) or any push into a repository that deploys on push, however the push names it (2025-12-22, 2026-08-30). …
Read the whole file at its exact version.
How to install
mdr add synthesisengineering/synthesis-skills/synthesis-agent-guardrails@sha256:690334b2da55a069The line at the top of this page pins the label v2.3.2, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_3f25egobi3q4fldb)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 14 versions of this file, between Sep 22, 2026 and Nov 2, 2026, about one every 3 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v2.3.2 latest | 2026-11-02 | f14428c | 6,152 B | A | view · diff |
| v2.3.1 | 2026-10-31 | eb0a60b | 6,152 B | A | view · diff |
| v2.3.0 | 2026-10-31 | e85c97c | 6,152 B | A | view · diff |
| v2.2.1 | 2026-10-27 | 0fa66e3 | 6,134 B | A | view · diff |
| v2.2.0 | 2026-10-22 | 0d59a59 | 6,134 B | A | view · diff |
| v2.1.1 | 2026-10-22 | 52c5c08 | 6,119 B | A | view · diff |
| v2.1.0 | 2026-10-22 | f372788 | 6,119 B | A | view · diff |
| v2.0.0 | 2026-10-06 | 8191e9d | 5,534 B | A | view · diff |
| v1.0.3 | 2026-09-28 | 6725b62 | 6,349 B | A | view · diff |
| v1.0.2 | 2026-09-27 | 95144f1 | 6,349 B | A | view · diff |
| v1.0.1 | 2026-09-24 | 5962cab | 6,349 B | A | view · diff |
| v1.0.0 | 2026-09-23 | 449388e | 6,349 B | A | view · diff |
| v1.0.0 | 2026-09-23 | aa168e8 | 5,602 B | A | view · diff |
| v1.0.0 | 2026-09-22 | 0193400 | 3,683 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6152 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
synthesisengineering/synthesis-skills · 23 stars · license Apache-2.0 · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_3f25egobi3q4fldb GET https://markdownregistry.com/api/v1/resolve?ref=synthesisengineering/synthesis-skills/synthesis-agent-guardrails GET https://markdownregistry.com/api/v1/blob/690334b2da55a069feaf1b0b0e0a5d5b07b66594f66520591e51ea55e9535639
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.