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 instructions/sous-chefs/postfix/agents-mdgit clone --depth 1 https://github.com/sous-chefs/postfixWhat 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 | $0.00296 | $0.00296 |
| Opus 5 | $0.00148 | $0.00148 |
| Sonnet 5 | $0.00059 | $0.00059 |
| Haiku 4.5 | $0.00030 | $0.00030 |
Grade A, and why
postfix AGENTS.md 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 2d 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
Postfix Cookbook Notes
This cookbook manages Postfix through operating system packages and service/configuration files. It does not build Postfix from source.
Postfix upstream develops primarily on FreeBSD and Linux, with occasional Solaris testing. The upstream source can run on many UNIX-like systems, but package availability and service behavior are owned by each OS distribution.
Supported cookbook platforms are limited to current package-based Linux distributions declared in metadata.rb and Kitchen: AlmaLinux, Amazon Linux, Debian, Fedora, openSUSE Leap, Oracle Linux, Red Hat, Rocky Linux, and Ubuntu.
FreeBSD, SmartOS, Scientific Linux, and legacy CentOS releases were removed from cookbook support during the resource migration because the current cookbook test matrix and service implementation are Linux/package oriented.
Map backends depend on distribution packages and Postfix module availability. The postfix_map resource only runs postmap for database-backed map types such as hash, lmdb, btree, cdb, dbm, and sdbm.
Dependency resolution uses Policyfile.rb. Keep test cookbook suites represented as Policyfile named run lists so Kitchen can select them with provisioner.named_run_list.
Sources:
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.
- 2d ago First seen · 20 lines · 296 tokens per session scan A 1745f4e11294
postfix AGENTS.md is an instructions file published in the GitHub repository sous-chefs/postfix (102 stars, last pushed 19d ago), licensed Apache-2.0. It adds 296 tokens to every session, about $0.0015 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.
Other instructions, from other repositories
varnish AGENTS.md
Instructions for sous-chefs/varnish, covering agents.md, agent guidance, package availability, apt (debian/ubuntu) and dnf/yum (rhel family).
ossec AGENTS.md
Instructions for sous-chefs/ossec, covering agents.md, cookbook purpose, agent findings, known limitations and package availability.
nfs AGENTS.md
Instructions for sous-chefs/nfs, covering agent notes, package availability, apt (debian/ubuntu), dnf/yum (rhel family, fedora, amazon linux) and zypper (suse).
emacs AGENTS.md
Instructions for sous-chefs/emacs, covering agents.md, cookbook purpose, agent findings, known limitations and package availability.
beyondcompare AGENTS.md
Instructions for sous-chefs/beyondcompare, covering agents.md, cookbook purpose, agent findings, known limitations and package availability.
varnish copilot-instructions.md
Instructions for sous-chefs/varnish, covering copilot instructions for sous chefs cookbooks, repository overview, project structure, build and test system and environment setup.