Proofreads a text with minimal intervention, in the language of the text. Fixes spelling, grammar, punctuation and obvious typos, keeps everything else, and returns the corrected text plus a short list of changes for review. Use when asked to proofread, correct, spell-check or fix the mistakes in a text without rewriting it.
Proofread Text With AI: Fix Only the Errors is a SKILL.md that proofreads a text with minimal intervention, in the language of the text; an agent buys it once for $0.05 over x402.
Rewriting, style editing, translation or fact-checking. It only fixes plain spelling, grammar, punctuation and typos and leaves wording, meaning, numbers and names as they are.
Tested 2026-09-30 with a strong and a weak model.
| Sonnet | Haiku | |||
|---|---|---|---|---|
| with | without | with | without | |
| Cases passed | 6/6 | 4/6 | 5/6 | 1/6 |
One run per model and case. Without the skill Sonnet "corrected" a text that was already right ("Mr." became "Mr", "between 8 and 2" became "8 a.m. and 2 p.m."); Haiku left that text alone, but for four of the six texts it sent back only a list of fixes instead of the corrected text, written in English for the Bulgarian, German and Spanish ones.
Same cases and the same checks with and without the skill. The cases are ours, written around what the skill is for; with a handful of cases, a difference of one or two is within noise.
Our own test text, before and after the skill ran. Excerpts only.
Before
Our team moved to the new office on 14 March 2026, and the transition went smoother then we expected. Each of the 42 employees recieved a welcome pack with a laptop bag, a notebook and a coffee voucher. The building, which Marta Kowalski found after six months of searching, is located on Harbour Street, close to the tram stop.…
After
Our team moved to the new office on 14 March 2026, and the transition went smoother than we expected. Each of the 42 employees received a welcome pack with a laptop bag, a notebook and a coffee voucher. The building, which Marta Kowalski found after six months of searching, is located on Harbour Street, close to the tram stop.…
Before
Миналата седмица общинският съвет прие бюджета за 2027 година, който възлиза на 48 милиона лева. Председателя Иван Петров заяви, че средствата ще се използват за ремонт на училищята и за нови детски градини. Според него ремонтите ще започнат през април и ще да приключат до септември. Част от парите ще бъдат насочени и към пътищата, тъй като много от тях са в много лошо състояние.…
After
Миналата седмица общинският съвет прие бюджета за 2027 година, който възлиза на 48 милиона лева. Председателят Иван Петров заяви, че средствата ще се използват за ремонт на училищата и за нови детски градини. Според него ремонтите ще започнат през април и ще приключат до септември. Част от парите ще бъдат насочени и към пътищата, тъй като много от тях са в много лошо състояние.…
Before
Am 3. Mai 2026 eröffnete die Stadtbibliothek Neustadt ihre neue Abteilung für Kinder. Die Leiterin, Frau Dr. Brigitte Hoffmann, sagte in ihrer Rede, das sie sich über den großen Andrang freue. Mehr als 300 Besucher waren gekommen, darunter viele familien aus der Umgebung. Die Bibliothek besteht seid 1954 an diesem Ort.…
After
Am 3. Mai 2026 eröffnete die Stadtbibliothek Neustadt ihre neue Abteilung für Kinder. Die Leiterin, Frau Dr. Brigitte Hoffmann, sagte in ihrer Rede, dass sie sich über den großen Andrang freue. Mehr als 300 Besucher waren gekommen, darunter viele Familien aus der Umgebung. Die Bibliothek besteht seit 1954 an diesem Ort.…
Before
El pasado sábado, el ayuntamiento de Valencia inauguró un nuevo parque en el barrio de Benimaclet. Según la alcaldesa, Marta Ferrer, el proyecto costo 2,4 millones de euros y tardó casi dos años en completarse. El parque tiene una superficie de 15.000 metros cuadrados, una zona infantil y un carril bici de tres kilómetros.…
After
El pasado sábado, el ayuntamiento de Valencia inauguró un nuevo parque en el barrio de Benimaclet. Según la alcaldesa, Marta Ferrer, el proyecto costó 2,4 millones de euros y tardó casi dos años en completarse. El parque tiene una superficie de 15.000 metros cuadrados, una zona infantil y un carril bici de tres kilómetros.…
Before
Вчера в нашем городе открылась новая выстовка современного искусства. Она находится в здании бывшего вокзала, которое реставрировали почти три года. Директор музея Анна Соколова рассказала, что на выставке представлено более 200 работ, созданных художниками из 12 стран. Не смотря на дождь, многие посетители пришли ещё до открытия и долго стояли в очереди.…
After
Вчера в нашем городе открылась новая выставка современного искусства. Она находится в здании бывшего вокзала, которое реставрировали почти три года. Директор музея Анна Соколова рассказала, что на выставке представлено более 200 работ, созданных художниками из 12 стран. Несмотря на дождь, многие посетители пришли ещё до открытия и долго стояли в очереди.…
Any language. Tried in: English, Bulgarian, German, Spanish, Russian.
Perpetual, non-exclusive; use and modify for yourself incl. paid work; no resale or republishing. Holder: Georgi Kalchev, aiskills402.com. Full terms.
Current version 1.0.4, updated 2026-11-12. Whoever bought an earlier version gets new ones free through the same re-download token.
v1.0.4 · 2026-10-08
Price changed from $0.03 to $0.05; the skill text is unchanged. Measured value for the strong model: Sonnet 4 of 6 without the skill, 6 of 6 with it.
v1.0.3 · 2026-10-07
- Test summary: the note on the run without the skill was wrong. Haiku did not translate any text; for four of the six texts it returned a list of fixes, in English, instead of the corrected text, and it left the already-correct text alone. Only Sonnet rewrote that text. The skill file itself is unchanged.
v1.0.2 · 2026-10-04
- Test summary: the same cases with and without the skill, per model, now shown next to the verdicts, including where the skill made no difference. The skill file itself is unchanged.
v1.0.1 · 2026-10-03
- Licence section: the note telling the agent to skip it now reads "ignore it while you work" instead of "ignore it while rewriting text", which was written for one skill and read oddly in the others. The skill's own instructions are unchanged.
v1.0.0 · 2026-09-30
First release: minimal-intervention proofreading in the text's own language, with a review list of changes.
The output is the corrected text followed by a short list of changes, so a person or another agent can review each edit instead of trusting the whole rewrite. When the text is already correct, the skill says so and lists no changes.
With a strong model it fixed every planted error in English, Bulgarian, German, Spanish and Russian across three runs. The small model was good in four of those languages but repeatedly missed two Bulgarian errors, a wrong plural form and a misspelled word. For Bulgarian, use the stronger model.
Neither tested model altered a number or a name, and the strong model kept British spelling as written. The one length failure came from a Spanish test text where the skill correctly flagged a genuine ambiguity and the extra line made the answer longer than allowed.
Six texts in five languages, two Claude models. Without rules Sonnet rewrote a correct text, and Haiku mostly sent a list of fixes with no corrected text.
7 Oct 2026 · 6 min read
We ran eight SKILL.md files on a strong and a weak model. Both mostly passed our checks; the weak one failed in ways checks cannot see, and used more tokens.
30 Sep 2026 · 5 min read
Writing & Rewriting
Rewrites AI-sounding prose so it reads like a person wrote it — in any language, without dropping facts. Use when asked to humanize a text, make it sound less AI-generated or less like ChatGPT, or clean machine phrasing out of an article, post, email, product description or page.
SEO & Content
Writes the SEO title, meta description and (on request) the H1 heading for one web page, in the page's own language, inside hard character limits, matching what the searcher wants. Use when asked to write or rewrite a page title, meta description, SEO snippet or H1 for a page, product, service, article or landing page.
Research & Summaries
Writes a faithful summary of a text in the text's own language, using only what the text says, with every number, name and date kept exactly and every qualifier kept. Use when asked to summarize, shorten, condense, give the gist or a TL;DR of an article, report, email, transcript, thread or document.
Editing & Proofreading
Reads one pasted document, such as a report, proposal, article, contract draft or spec, and lists every place where it contradicts itself, as strict JSON with both conflicting passages quoted word for word. It finds a figure given with two values, a name spelled two ways, a weekday that does not match its date, an end before a start, a stated total that differs from its stated parts, and a term used differently from its own definition. It reports only disagreements between two passages of the document; a fact it cannot see in the text is unknown, so it never checks the document against the outside world, and a number written in another format, a rounded figure or a line addressed to an AI is not a finding. Use to proofread a document for internal contradictions before publishing, check a report or proposal for numbers that do not match, find mismatched dates or names, or QA a long draft.