ghost-publish
Claude Code / Codex skill for publishing to Ghost from markdown. Drives TryGhost's official ghst CLI — strips front matter Ghost would render as prose, builds galleries and embeds, and verifies what Ghost actually stored against your source file.
ghost-publish
> This repository is generated. ghost-publish is developed in
> [kevin-burns/claude-skills](https://github.com/kevin-burns/claude-skills) and mirrored here on every merge, so that Ghost
> users can find and install it on its own. **Please raise issues and pull requests
> [in the source repository](https://github.com/kevin-burns/claude-skills/issues)** — changes made here would be overwritten by
> the next build.
Get a markdown file onto a [Ghost](https://ghost.org) blog with the official ghst CLI, and
then prove that what arrived is what you sent.
Part of the [claude-skills](https://github.com/kevin-burns/claude-skills) collection, and mirrored here as a standalone plugin.
Why the proving is the point
ghst post update returns a clean JSON object whether or not the content arrived intact. Its
own output is not evidence. On the first real run of this workflow, a successful update left
YAML front matter rendered as visible text above the first paragraph of the post, and a
verification pass that checked sixteen expected strings reported 16/16 while it sat there.
A check that only asks "is what I wanted present?" is blind to everything that should not
be. So verify_post.py compares the whole document in both directions.
What it does
- Strips front matter before upload. --markdown-file sends bytes verbatim and Ghost has
no front-matter concept, so a leading --- block becomes prose. prepare_post.py removes
it and prints the ghst flags it implies (--title, --excerpt, --tags). A post's
slug has no flag on post create, so --payload writes the --from-json payload that
carries it; pages take --slug directly via --target page.
- Verifies both directions. verify_post.py reports sentences in the source but missing
from Ghost, and sentences in Ghost with no source — leaked front matter, editor edits, or
an older draft still in place.
- Works on pages as well as posts. A Ghost page holds the same Lexical document, so the
same read-rewrite-push loop applies with page in place of post and .pages[0] in place
of .posts[0]. Pages take --slug on create; posts do not.
- Builds the two cards markdown can't express. Ghost already makes image, quote, code,
table and horizontal-rule cards from markdown. It never makes a gallery (consecutive
images stay separate cards; the limit is nine, three to a row) or an embed from a bare
video URL (that stays a link — the editor embeds on paste, the converter doesn't).
enrich_cards.py rewrites both on the document Ghost produced, using Ghost's own /oembed/
endpoint so nothing is fetched from a third party. A provider's pasted <iframe> — Bandcamp
and friends — is left byte-for-byte alone, width and styling included.
- Names the traps that make a first run fail confusingly: auth login breaking behind an
authenticating proxy, Ghost 301-ing to its own url unless it sees X-Forwarded-Proto,
post get having no html field, and post update converting markdown to Lexical so the
source is not recoverable afterwards.
- Separates publishing from uploading. Email fires on the publish transition, so
--newsletter belongs on publish/schedule, never on create.
What it does not do
- It doesn't write or edit the prose. Use clear-and-human for that.
- It doesn't publish or schedule unless told to in the moment. Scheduling with a
newsletter attached emails real subscribers with no second confirmation. status: in front
matter is deliberately not translated into a flag — publishing is a state transition, not
a field in a file.
- It doesn't configure Ghost, Docker, DNS or a reverse proxy. If ghst can't reach the
site that's infrastructure, and the skill says how to tell that apart from its own problem.
- It doesn't parse all of YAML. Flat key: value and inline lists only. Block lists,
nested maps and multi-line scalars are reported as unparsed rather than guessed at.
If your blog is behind an IdP
Cloudflare Access, Tailscale, Authelia, any SSO proxy — **ghst cannot authenticate through
it, and neither can this skill.** Neither is at fault: the IdP is refusing an unauthenticated
request, which is its entire purpose. Resolving it is the operator's side of the line.
The skill documents two routes, and the usual answer costs **one request header and changes no
security posture**: Ghost 301-redirects to its own configured url when it believes the
connection is insecure, so an internal request bounces back out through the front door. Give itX-Forwarded-Proto: https in the reverse proxy that already fronts it and the internal path
works, with the IdP left fully in place on the public one.
What you should not do is punch a hole in the IdP before trying that. It was the first thing
I reached for and it turned out to be unnecessary — and one variant of it, an allow-list on a
dynamic residential IP, would have handed that bypass to a stranger the next time the address
was reassigned.
Requirements
ghst installed separately and already authenticating:
``bash`
npm i -g @tryghost/ghst
export GHOST_URL="https://your-blog"
export GHOST_STAFF_ACCESS_TOKEN="{id}:{secret}"
ghst post list --json --jq '.posts[0].title' # a title means you're connected
The scripts are standard library only, Python 3.12+, and never call Ghost — they readpreflight.py
files and compare them. The exception is , which runs ghst --version locally
and still touches no network.
> ghst is beta. Behaviour here was verified against 0.16.6. Several of the traps`
> above are undocumented behaviours rather than promises, so re-check them after an upgrade.
>
> That pin is enforced rather than merely written down:
>
> bash`
> python3 scripts/preflight.py # warns on drift, names what to re-verify
> python3 scripts/preflight.py --strict # for CI, where drift should stop the run
>
>
> It warns and does not block, because a check that fails the day ships a patch is aVERIFIED
> check that gets deleted. Bump in that file only after re-running the four traps
> against the new release — the changelog will not mention them, since to Ghost they are not
> features.
Usage
`bash
uv run ~/.claude/skills/ghost-publish/scripts/prepare_post.py post.md --out /tmp/body.md
ghst post update <post-id> --markdown-file /tmp/body.md --tags "Writing,Python" --json
ghst post get <post-id> --json --jq '.posts[0].lexical' > /tmp/lexical.json`
uv run ~/.claude/skills/ghost-publish/scripts/verify_post.py /tmp/body.md /tmp/lexical.json
Metadata lives outside the body and is checked separately:
`bash`
ghst post get <post-id> --json \
--jq '.posts[0] | {status, slug, tags: [.tags[]?.name], feature_image}'
Testing
`bash`
cd ghost-publish && python3 -m pytest tests -q
43 tests. Two are regressions from running the verifier against a real 4,500-word post rather_
than fixtures: Lexical splits formatted spans into separate text nodes (which made every italic
look like an edit), and was stripped as an emphasis marker (which turnedfidelity_check.py into a difference).
The card shapes are pinned against a post built by hand in Ghost's own editor and readfileName
back, not inferred from Ghost's TypeScript definitions — those give field names but not the
serialised form, and two details would have been guessed wrong: a gallery row holds three
images, and a gallery image's is the original upload name while src may carry a-1 deduplication suffix that the filename does not.
Provenance
Wraps [ghst`](https://github.com/TryGhost/ghst) (TryGhost, MIT). No credentials are bundled
or stored. Not affiliated with or endorsed by Ghost.
``bash
uv run ~/.claude/skills/ghost-publish/scripts/prepare_post.py post.md --out /tmp/body.md
ghst post update <post-id> --markdown-file /tmp/body.md --tags "Writing,Python" --json
ghst post get <post-id> --json --jq '.posts[0].lexical' > /tmp/lexical.json`
uv run ~/.claude/skills/ghost-publish/scripts/verify_post.py /tmp/body.md /tmp/lexical.json
Metadata lives outside the body and is checked separately:
`bash``
ghst post get <post-id> --json \
--jq '.posts[0] | {status, slug, tags: [.tags[]?.name], feature_image}'
ghst installed separately and already authenticating:
``bash`
npm i -g @tryghost/ghst
export GHOST_URL="https://your-blog"
export GHOST_STAFF_ACCESS_TOKEN="{id}:{secret}"
ghst post list --json --jq '.posts[0].title' # a title means you're connected
The scripts are standard library only, Python 3.12+, and never call Ghost — they readpreflight.py
files and compare them. The exception is , which runs ghst --version locally
and still touches no network.
> ghst is beta. Behaviour here was verified against 0.16.6. Several of the traps`
> above are undocumented behaviours rather than promises, so re-check them after an upgrade.
>
> That pin is enforced rather than merely written down:
>
> bash`
> python3 scripts/preflight.py # warns on drift, names what to re-verify
> python3 scripts/preflight.py --strict # for CI, where drift should stop the run
>
>
> It warns and does not block, because a check that fails the day ships a patch is aVERIFIED` in that file only after re-running the four traps
> check that gets deleted. Bump
> against the new release — the changelog will not mention them, since to Ghost they are not
> features.