signing-preflight SKILL.md skillA
signing-preflight from avelikiy/great_cto is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add avelikiy/great_cto/signing-preflight@git:20260922.935dbd1Pins git:20260922.935dbd1 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- avelikiy/great_cto
- Path
skills/signing-preflight/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260922.935dbd1, committed Sep 22, 2026
- Size
- 3,297 bytes
- Repository stars
- 112
- License
- MIT
Before the first commit of a session, check that commit signing will work — the key is loaded and unlocked — and ask the operator to unlock it once, up front, instead of discovering it after a hundred unsigned commits. Never disables signing silently, never re-signs history without asking. Use at the start of implementation work in a repo that signs commits ("коммиты не подписаны", "ssh-keygen висит", "gpg failed to sign"). Loaded by senior-dev, devops.
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
# signing-preflight — find the locked key before the first commit, not after the hundredth
On real projects: an agent committed unsigned without asking to unlock the key; a
signing call on a locked SSH key hung the session; 121 commits had to be re-signed after
the fact — and the key turned out to have no passphrase at all. Each was a two-second
question at the start of the session.
## Check (read-only, bounded)
```bash
git config --get commit.gpgsign # true → signing is expected
git config --get gpg.format # ssh | openpgp (empty = openpgp)
git config --get user.signingkey
```
**SSH signing** — does a test signature finish? (`user.signingkey` may be a key file or a
literal `key::ssh-…`; the test signature is the check that works for both.)
```bash
K="$(git config --get user.signingkey)"; case "$K" in key::*) printf '%s\n' "${K#key::}" > /tmp/sigpre.pub; K=/tmp/sigpre.pub ;; esac
echo preflight | perl -e 'alarm 5; exec @ARGV' ssh-keygen -Y sign -n git -f "$K" >/dev/null 2>&1 && echo signs || echo CANNOT-SIGN
```
**OpenPGP** — a batch signature that refuses to prompt:
```bash
…Read the whole file at its exact version.
How to install
mdr add avelikiy/great_cto/signing-preflight@sha256:4d68e2be97cdaf35The line at the top of this page pins the label git:20260922.935dbd1, 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_hysfe2hzpqh32sfr)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 22, 2026.
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 (3297 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
avelikiy/great_cto · 112 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_hysfe2hzpqh32sfr GET https://markdownregistry.com/api/v1/resolve?ref=avelikiy/great_cto/signing-preflight GET https://markdownregistry.com/api/v1/blob/4d68e2be97cdaf3584a035b746844cc0f341b260870278b64b7c0fd5efa528fc
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.