OWID data update announcements

Short announcement posts published when a data scientist refreshes a dataset, written in that person's voice.

Ported skill — keep in sync. This is a port of Charlie Giattino's claude.ai skill owid-data-update-announcement (exported 2026-08-17), adapted so /update-dataset can call it mid-pipeline. His is the version the comms team maintains, and references/examples.md here is his file verbatim. When you learn something general about how these posts read, tell Charlie so it lands in the source skill too — otherwise the two drift and the next re-export silently reverts it. Re-syncing means someone re-exporting the .skill bundle from claude.ai; it is not fetchable from a terminal session.

Sibling skill: /data-updates-comms fills the internal Slack form that feeds this post. That one is written for Charlie; this one is written for readers.

references/examples.md is the style guide. Read at least three before drafting, picked to match the update in hand — solo refresh, multi-author, new chart, static viz, or politically contested. Everything about how these posts read is in there: how they open, how long they run, how they introduce a source, how they handle caveats, how they close. This file deliberately doesn't restate that, because rules abstracted from the examples get applied where they don't fit. Match the examples instead.

The same goes for subject matter. OWID has usually written about the topic already — a topic page, an article, a Data Insight — and that writing is the golden example for how to frame this subject. Steps 2 and 4 cover it.

references/gdoc-format.md holds the Google Doc mechanics: the CMS format, the styling, and the traps.

What follows is only what neither set of examples can tell you.

Two entry modes

Mode A — called by /update-dataset (step 9b). The runner is the author, mid-pipeline. The facts are already gathered:

• workbench/<short_name>/update-context.yml — dataset.title, dataset.producer, source.url_main, source.citation_full, coverage.*, charts.published_count, charts.selected_views, and the editorial_context.* snippet lists.
• workbench/<short_name>/slack-announcement.md — the Slack draft from step 9. Its editorial framing is the closest cousin to this post; read it before drafting.
• Author is the git user (git config user.name), resolved to a canonical OWID name through etl.owners.resolve_owner. If that returns None, ask who the post is by rather than writing the raw git name — authors: is a public byline, and a checkout's commit identity can be an automation account or a spelling the site doesn't know. Nothing in the Mode A context records collaborators, so name the byline you resolved when you hand over the drafts and ask whether anyone else should be credited — updates are often joint work, and authors: takes a comma-separated list.

Skip step 1 — there is no Slack message to find. Step 2 applies in full: the prior-coverage check decides whether a post should exist at all, and Mode A is exactly where it gets skipped by accident, because the update itself feels like reason enough to publish. Don't gate on the chart image (step 3) — a mid-pipeline update shouldn't stall on a screenshot — but do settle which chart before drafting. Anything the post needs that isn't in the YAML, gather it (snapshot .dvc, garden .meta.yml, url_main) and persist it back so the next consumer doesn't redo the work.

Mode B — standalone. Someone asks for a post out of the blue, or pastes a Slack message. Run the full workflow below.

Workflow

1. Find the announcement (Mode B only). Search Slack #data-updates-comms (channel ID C0A8P7H0HC2) with include_bots: True, sorted by timestamp. A workflow bot posts these, so without include_bots the channel looks empty.

Run slack_read_thread on the parent message even when search shows no replies — corrections and co-author additions live there.

The author is the "Message from:" field inside the bot message, not the Slack account that posted it. A thread commenter is not automatically a co-author; flag it as a question.

Link the message when reporting back, using the Permalink field from the search result: "Found Tuna's 25 June message on…".

Slack permalink timestamps convert as p1234567890123456 → 1234567890.123456.

2. Check what we've already published about this data. Both modes, before the chart and before any drafting. Two things come out of it: whether a post should exist at all, and — if it should — what we have already said that the new one has to stay consistent with.

The lookup. posts_gdocs on the public Datasette holds every published gdoc: slug, type, publishedAt, and a searchable content JSON blob (keys title, excerpt, authors, kicker, type, body). Query it through etl.http.session so our traffic is tagged, and remember it is DuckDB-backed — json_extract_string, not MySQL's ->>.

1. Resolve the dataset's chart ids: chart_dimensions → variables.catalogPath, across all versions of the dataset, not just the one being updated.
2. Collect every slug each chart has ever had — the current one from json_extract_string(cc.config, '$.slug'), plus every historical slug from chart_slug_redirects WHERE chart_id IN (…).
3. Search posts_gdocs.content LIKE for any of those slugs — a /latest post's CTA embeds the grapher slug — OR'd with the producer name and the dataset title.
4. Keep type IN ('announcement','data-insight','article','topic-page','linear-topic-page'), order by publishedAt DESC. The two halves of the result do different jobs: announcement and data-insight drive the cooldown below, while article, topic-page and linear-topic-page never block a post — they are there to tell you how we already frame the subject.

The keys are not equally precise, so read the hits accordingly. A slug hit is definitive — it means a post linked this very chart. A dataset title is usually tight enough ("World Development Indicators" → 9 posts). A producer name ranges from precise to useless: "California Public Utilities Commission" matches 1 post, "World Bank" matches 113, nearly all about other datasets. So for a big-name producer, lean on the slugs and the dataset title, and treat producer hits as candidates to eyeball rather than evidence of prior coverage.

The historical-slug hop (item 2) is not optional — skipping it produces a false all-clear. Charts get renamed between cycles, and the prior posts keep pointing at the old slug. Searching only the current slug is the single most likely way to conclude "nothing published yet" about a dataset we have covered twice. (Robotaxis, Aug 2026: the live chart is passenger-kilometers-traveled-self-driving-taxis and returns zero hits, while all three prior posts link the retired passenger-miles-traveled-self-driving-taxis; chart_slug_redirects ties that slug to the same chart id and closes the gap. Searching the producer name alone found 1 of 3; the dataset title found 0. No single key suffices — OR them together.)

The cooldown — a hard stop. If the most recent announcement or data-insight about this data is less than six months old, do not draft. Say so, list the prior posts with their dates, give the date it becomes eligible, and offer the internal Slack post instead — that one has no cooldown, it is internal and runs every update. A third post inside six months repeats us to the same readers, however genuinely new the data is. Draft anyway only if the user explicitly overrides.

When the gate passes but prior coverage exists. Read it before drafting, and stay consistent with it: the wording we use for the concept, which aspect we lead with, how much we hedge. Where the prior piece is an announcement or a Data Insight on the same data, treat the new post as an update of that text rather than a fresh composition — same framing, moved forward. Either way still produce two options (step 5); consistency with our past wording is not an excuse to hand over one draft.

3. Get the chart. The pick belongs to the data scientist, who has already attached candidates to the Slack message — don't suggest one.

Two routes lead to the image, and which one is the user's call — ask, don't infer it from how interesting the chart looks. Ask in both modes, right after the chart is chosen and before you post any export instructions: the default route's block below tells the user to export, upload and paste in one go, so posting it first settles the question by default instead of asking it. Skip the question only when no post is being drafted (a cooldown decline needs no image), or when the update is a static-viz refresh — there the route is already settled, because /create-static-viz hands its viz to /create-figma-chart itself. Settled is not delivered, though: the viz://static PNG is a pre-Figma artifact, so finish through the designed route's ending below — the approved frame's PNG, then upload, alt text, paste back. A map is not an exception: it takes the same two routes as any other chart. The designed route just carries extra map guidance — /create-figma-chart → reference/per-chart-type/maps.md, where the small-islands trade-off is decided — which is a reason to offer that route on a map, not to skip the question.

Route	What it costs	When it fits
Default grapher export	minutes	the chart already reads well at 540px: few series, legible labels, nothing to reduce or re-annotate
Designed chart via /create-figma-chart	a build in the shared Charts file, plus a design review	the default is crowded — many series, a legend eating the width, a marker on every observation, or a story that wants direct labels or an annotation

Series count is the usual tell: past about four lines grapher falls back to an elbow legend that can take ~30% of the width, and the lines themselves stop being followable. Say what you can see when you ask — "the default has nine lines and a legend down the right; a designed version could cut it to four with direct labels" is a question the user can answer; "do you want a Figma chart?" is not.

Either way the deliverable is named for the post's own image slot — YYYY-MM-data-update-<short-topic> — so the export drops into the {.image} block without renaming. In Mode A, record the choice under announcement: in update-context.yml.

On the default route, post this block exactly as written:

## Now let's choose a chart

1. Export a square version of the chart with no terminology definitions at the bottom
2. Rename it to `YYYY-MM-data-update-[short-topic].png` — e.g. `2026-08-data-update-whaling.png`.
3. Upload it to the [admin images page](https://admin.owid.io/admin/images), then use the button there to generate alt text.
4. Paste your chosen chart here in the chat so that I can use it to draft versions of the announcement

On the designed route, ask /create-figma-chart for the PNG explicitly — its Step 9 does not export one by default, because the designer usually keeps editing, so a run that isn't asked ends at an approved frame and the post's image gate never opens. Ask it for the square 540×540 output (the format the block above asks for too), exported at 3× — 1620×1620, which is that family's export scale; 540×540 names the template, not the file you want. Give it the image slot's name as the frame slug, since that skill uses the frame name as the export filename. The last two steps are then the default route's, unchanged: upload the PNG to the admin images page, use the button there to generate alt text, and paste it back here. The design review is not the gate — the delivered image is.

Separate the chart choice from the chart image, and never draft before the choice is settled. Which chart the post is built around has to be fixed first, in both modes; only the PNG itself can lag. Drafting around an unsettled chart is how you end up rewriting: the view that gets picked turns out to be dominated by one outlier country, or carries a framing controversy, and the copy you already wrote is now about the wrong thing. Step 2 usually settles it for you — if we have covered this data before, the chart we used then is the default, and changing it needs a reason.

Mode B: stop here and don't draft until the image arrives. The gate is on the post, not on the skill — a partial ask the chart has no bearing on (the CTA url: and text:, a Doc title, a check on an existing draft) gets answered straight away; the description invites those. Mode A: ask the route, post the matching instructions, and keep going without the PNG, filling the filename: slot from the convention — but get the chart decision confirmed before you draft, and say which chart you are writing to.

On picking the chart for a large multi-topic dataset, see "Big datasets" below — the choice question is different there, and it is the case most likely to send you back for a rewrite.

4. Read the golden examples. There are two kinds.

How these posts are written — at least three from references/examples.md, matched to this update.

How OWID frames this topic — whatever we've already published on it. This is where the tone for a specific subject comes from, and it's often quite different from what a general-purpose take would produce. Step 2 has already handed you the list for this dataset, so make it one pass, not two: read those hits first, then widen to the topic's other pages if they aren't covered. Two to four pages is plenty; this doesn't need to be exhaustive:

• The topic page introduction. Grapher charts often name it in the footer — the child mortality chart reads OurWorldinData.org/child-mortality.
• Any major article on the topic, e.g. Child mortality: the greatest problem, in brief.
• Data Insights, especially recent ones. They're the closest thing to this format in length and register.

Find them by searching rather than guessing at URLs.

Read for framing and register, not for facts to lift: which aspect OWID leads with, how it words the concept, how much moral weight it carries, what it treats as the point. If the topic page frames the subject differently from the draft you had in mind, follow the topic page.

5. Draft two versions in the chat. Make them worth choosing between: a different angle or title pattern, not the same draft reworded. The point is to hand the author a real choice rather than anchor them on your first angle.

6. Get sign-off, then save. Iterate until the author picks one (or splices the two). In Mode A, save the chosen draft to workbench/<short_name>/data-update.md.

7. Create the Google Doc — only now, with the approved content already inside it, and share the link. See references/gdoc-format.md for the title convention, the styled-HTML upload, the styling source, and the verification step. The ordering matters: the Drive MCP has no edit-content or delete tool, so a Doc created too early is an orphan the user has to clean up by hand.

8. Post the admin reminder, exactly as written, once, immediately after the Doc link:

## Now that the GDoc is created, don't forget to:

1. Add the GDoc to the admin by clicking the blue "+ Add document" button in the top right [here](https://admin.owid.io/admin/gdocs) and following the instructions
2. Add relevant topic tags

Template

Which fields the post carries, and in what order. This is the drafting shape — spaced out for reading in the chat, the way references/examples.md displays the published posts:

title:

excerpt:

type: announcement

authors: [Mode A: the resolved git user, plus anyone else credited; Mode B: the Slack "Message from:" line — comma-separated]

kicker: data-update

[+body]

[body paragraphs, blank line between them]

{.cta}

url: [see "The CTA link" below]

text: [see the examples]

{}

{.image}

filename: YYYY-MM-data-update-[short-topic].png

{}

[]

The Google Doc is not spaced like this. Drop every blank line except the ones between body paragraphs, between the body and {.cta}, and between {.cta} and {.image}; frontmatter fields and the insides of the {.cta} / {.image} blocks go on consecutive lines. references/gdoc-format.md is the authority on the Doc layout — build the upload from it, not from the block above. A blank line that survives into the upload becomes an empty Google Docs paragraph, and the Drive MCP can't edit it back out.

type is always announcement; kicker is always data-update, lowercase and hyphenated. Content inside :skip / :endskip doesn't publish — use it for internal notes.

Two mechanics in the static-viz example (#7, population growth) are not the house pattern — don't copy them. It carries a featured-image: line between excerpt: and type:; we don't use that field, and the five frontmatter fields above are the complete set. Its image is world_population_growth.png; ours is always YYYY-MM-data-update-<slug>.png, static-viz refreshes included. Everything else about that post is a good model — the "We've refreshed" title, the plural voice, the paragraph on why the pipeline work matters — which is why it's in the examples file.

The comms person running this workflow (Charlie Giattino) never appears in authors.

The CTA link

text: — see the examples. Between the eight of them they cover the range: dataset-wide, single chart, date depth, brand-new chart, topic page.

url: — if the data scientist provided one, use theirs. Don't second-guess it and don't invent a replacement. The table below is for when they didn't (which is the normal case in Mode A):

Situation	URL
One chart is the point	https://ourworldindata.org/grapher/<slug>
Several charts (the default)	https://ourworldindata.org/search?datasetProducts=<dataset title>
The topic has an explorer	https://ourworldindata.org/explorers/<name>
A curated topic page fits better	the topic URL, e.g. https://ourworldindata.org/population-growth

Never /collection/custom?charts=….

The datasetProducts value is the dataset title, not the producer. Resolve it in this order: (a) dataset.title in the garden .meta.yml when it's set there as an override, otherwise (b) meta.origin.title in the snapshot .dvc. It often carries a parenthetical acronym — World Bank Poverty and Inequality Platform (PIP), Luxembourg Income Study (LIS). Spaces encode as +, parentheses as %28 / %29, and several datasets join with ~ (see the democracy example).

What the examples can't tell you, either kind

Current conventions. The examples span a convention change, so don't infer from majority vote:

• Kicker is data-update. Older posts show Data update; the file has been normalized, but don't be surprised by the old form elsewhere.
• Titles are usually a question ("How do homicide rates vary around the world?") or "Track " ("Track the recovery of the ozone layer with updated data"). Another shape is fine when the source or the framing calls for it — don't force one of the two: example 6 is a statement plus an imperative, example 7 is "We've refreshed…". Stat-as-title has been de-emphasized since mid-2026, so treat example 3 as a shape you can use rather than one to reach for.
• Chart counts state public charts only. An update touching 41 charts of which 28 are public is "28 of our charts." Approximate counts are fine: if the data scientist gave a rough figure, "about 60 of our charts" works, and there's no need to chase an exact one. In Mode A, charts.published_count in update-context.yml is already filtered to published charts.

Length. Bodies in the examples run 117–161 words across four to seven paragraphs. Drafts should land in that range. Shorter is usually better on heavy topics.

Voice. Solo author refreshing data → first person singular. Multiple authors, a brand-new chart, or a static viz refresh → first person plural.

The opening line. The first body paragraph has to connect to the title and complement it — not restate it, not start somewhere unrelated — and it has to land in something the reader already recognizes. Never open on the mechanics of the update; "I recently updated…" is how these posts end, in every example. Two shapes carry all eight:

• Pose or answer the title's question. #4 opens "Measuring democracy is challenging. It has many dimensions…" against the title "How can we measure the state of democracy around the world?"; #8 defines homicide before using it; #7 repeats its own question.
• Ground the subject in human stakes before any data. #2: the ozone layer "plays a vital role in making the planet habitable for us and other species", then skin cancer. #6: "just under half of the people alive today are dependent on synthetic fertilizers."

Note the inversion in #5: when the title carries the statistic, the opening line is the question ("How many people live in poverty around the world…?"). That is the same rule seen from the other side — between them, the title and the first line owe the reader one hook and one orientation.

How specific to get. After the opening, get concrete — but an announcement is not a Data Insight. A DI is built around a single figure and interrogates it; an announcement points readers at a dataset and trusts the chart to carry the detail. Across the eight examples the whole body runs to roughly zero to three numbers, and several carry none at all. If you find yourself writing a third statistic, you are probably writing the wrong format.

Caveat-heavy data: fewer numbers, not more hedging. The more caveated the data, the less the copy should lean on specific values — a number surrounded by qualifications invites the reader to trust it anyway. The examples are consistent about this: #4 (democracy, contested measurement) and #8 (homicides, patchy country coverage) cite no data figures at all, and #8 spends its closing paragraph on the coverage limitation instead of a finding. #5 (PIP), the cleanest and best-understood source of the eight, is the one that carries three. Where the caveat changes how the chart should be read, state the caveat and skip the number. "Editorial sensitivity" below covers the contested case; this is the same instinct applied to data that is merely messy.

Big datasets. When the update spans a large multi-topic dataset, the chart has to convey the dataset's expanse, not one slice of it — otherwise the post advertises a single indicator while claiming to be about hundreds. A breakdown-by-category view is the usual way: example 1 shows government spending split by purpose (health, education, defense) rather than one country's total, the same way causes of death stands in for a burden-of-disease release.

Where no single chart can do that, don't force it. Name the broad areas the dataset covers — the opening line is the natural place, as a list the reader can see themselves in — and point at one representative chart as an example rather than pretending it is the whole. Keep the chart count as the scale signal (public charts only, as above); it does more work here than any single figure.