Serve the documentation at handsontable.com/docs/hyperformula/

[budnix]

✅ Safe to merge into develop now — then release it tomorrow, 2026-10-15

• Merging into develop changes nothing live. develop only builds the branch preview, which also feeds staging (https://dev.handsontable.com/docs/hyperformula/).
• The live docs move when this reaches master, through a quick release or a hotfix. Please do that tomorrow, 2026-10-15, together with the new handsontable.com.
• Backward compatible at release. Every old address answers a permanent redirect (301) to the same page at the new address, query and #anchor kept.
• The new address works the moment the master deploy finishes. handsontable.com/docs/hyperformula* is already routed to the handsontable.com Worker, which proxies it to this Worker (live since 2026-10-14, 15:42). Nothing else changes: the rest of handsontable.com and the landing page at hyperformula.handsontable.com/ stay as they are.
• The release needs nothing beyond these seven commits.
  • No CHANGELOG.md entry: docs-infrastructure changes have none, as with Migrate the documentation deployment from Netlify to Cloudflare Workers #1719, Agent-friendly documentation: .md companions, llms.txt, coding-agent guide (HF-154) #1703 and Make VuePress base, dest and sitemap hostname configurable #1663.
  • script/release/ doesn't depend on the docs address or base.
  • For a docs-only hotfix, the seven commits also apply cleanly on master: git cherry-pick 0bf433df efba7bfd b58b4d61 7195670e 87ef9f97 cf44925c 14ff1098, checked.

Order with the new handsontable.com (2026-10-15): this release can go out before or after the new handsontable.com, and in both cases every old address keeps working.

• Released first (recommended): the docs answer at handsontable.com/docs/hyperformula/ at once, and every old address redirects there.
  • The links from the docs to the website work on the current site and on the new one (cf44925): the logo links the landing page's own host, and the "support options" links use handsontable.com/support.
  • Nothing visible changes when the new site goes live.
• Released after the new site: the new site's links to these docs answer the HyperFormula 404 page until this release.

Review fixes (2026-10-15): b58b4d6, 7195670, 87ef9f9, cf44925 and 14ff109:

• the Worker reads the base from build.config.js, and the Cloudflare build stops on any base or hostname drift;
• a canonical link on every page;
• the README, a JSDoc comment and an example path fixed;
• the links to the website work on the current site and on the new one;
• the llms-full.txt page URLs keep .html (14ff109). Without it, the pages with a dot in their name (guide/migration-from-2.x-to-3.0, api/classes/cellcontent.* and others) answered 404 at the listed URL, because the Worker treats a dotted last segment as a file name.

Re-verified on the build before 14ff109 (preview aa81f6de); see the comment "Re-verified on the final build".

Context

The HyperFormula pages move from hyperformula.handsontable.com to handsontable.com:

• the documentation goes to handsontable.com/docs/hyperformula/, next to the Handsontable docs under /docs/;
• the landing page goes to handsontable.com/hyperformula/ with the new website (launch 2026-10-15).

The docs stay in this repository and keep deploying exactly as today: Workers Builds builds master into the hyperformula-docs Worker. Nothing moves out of the HF team's hands. handsontable.com proxies /docs/hyperformula/* to this Worker without changing the path, so visitors never see the workers.dev address. This is the same arrangement handsontable.com/docs/ uses for the Handsontable docs.

What changes here:

• build.config.js: base /docs/hyperformula/, the output under the same prefix, and https://handsontable.com as the hostname. VuePress writes the new address into every link, asset, favicon, search entry, sitemap entry, .md companion and llms-full.txt URL.
• _headers: the immutable cache follows the hashed assets to /docs/hyperformula/assets/*.
• worker/index.js: backward compatibility. Every former address (/docs, and anything under /docs/ outside the new base) answers 301 to the same path under https://handsontable.com/docs/hyperformula/, with the query string kept.
  • It lives in the Worker, not in _redirects: a /docs/* rule there would also match /docs/hyperformula/*, because _redirects applies even when an asset matches.
  • The target is absolute, so a visitor on the old host lands on handsontable.com.
• Hard-coded addresses:
  • in the docs: the logo link, the two "support options" links (now handsontable.com/support/), the three coding-agent snippets, and one release-notes link (now relative);
  • outside the docs: README, DEV_DOCS, the package.json homepage (the landing page) and the GitHub templates.
• Built-in functions page: the nine catalogue links to API pages become relative on the generated page. The library strings themselves are untouched; see the follow-ups.
• site.webmanifest: icon paths are relative now. The absolute /favicon/... paths had returned 404 since the docs moved under /docs/.
• docs/.vuepress/public/robots.txt removed. Under the docs base it was never at a site root. handsontable.com/robots.txt lists this sitemap instead.

How the old addresses keep working

Old address	Today, after this merge	From the handsontable.com launch (2026-10-15)
hyperformula.handsontable.com/docs/…	hyperformula-website proxies it here → this Worker 301s to handsontable.com/docs/hyperformula/… (hyperformula-website passes redirects to other hosts through unchanged)	handsontable.com answers the old host itself: one 301 to the same page
…/guide/…, …/api/…, …/api-ref-readme.html	hyperformula-website's _redirects → /docs/… → the 301 above (two hops)	one 301 to the same page under /docs/hyperformula/
hyperformula.handsontable.com/ (landing page)	unchanged	301 to handsontable.com/hyperformula/
handsontable.com/docs/hyperformula/… (the new address)	served by this Worker through the handsontable.com proxy	the same

How did you test your changes?

1. "Merged now" traced end to end: 26 old addresses, 0 failures. The trace used:

• hyperformula-website's shortcut rules;
• this PR's preview build as the docs Worker;
• the handsontable.com production Worker code (run locally) for the new address.

The list:

• the 14 distinct old HyperFormula links that the live Handsontable docs carry (1,349 current pages plus the formula pages of 24 older versions);
• /docs, /docs/, /docs/api, /docs/api/, a guide page with a query, a guide page with an anchor, the demo, llms-full.txt, a .md companion and the security certificate PDF;
• the /api/, /guide/… and /api-ref-readme.html shortcuts.

Every one ends on a 200, with every #anchor present on the target page.

2. The same 14 links in the launch setup. Run through handsontable.com's own host rule (from 2026-10-15): one 301 each, every target 200, every anchor found.

3. The whole preview build (docs-move-to-handsontable-com-hyperformula-docs.handsoncode.workers.dev, commit 00932e6, the same change on master; re-run on develop below):

• all 228 sitemap pages and 720 distinct internal links;
• no link leaves /docs/hyperformula/, and none names the old host;
• every link answers 200. The exception is ../api on the basic-usage page, which gets the usual trailing-slash 301, as today;
• the sitemap and llms-full.txt list 228 URLs, all https://handsontable.com/docs/hyperformula/…;
• hashed assets are served max-age=31536000, immutable;
• the JavaScript router base is /docs/hyperformula/, with no other /docs/ path and no old host in any bundle.

4. The Worker in Node against a stub asset store:

• former addresses → 301 with the query kept;
• /docs/hyperformula → 301 to the slash;
• documents → 200;
• a missing page → the 404 page.

5. The deploy. Workers Builds for hyperformula-docs:

• production branch master, build npm run docs:build:cf, deploy npx wrangler deploy. The active version was deployed from master on 2026-10-09;
• this branch's preview builds ran the same build command successfully.

CI: now based on develop. The two jobs that failed against master (EDATE tests from develop's test suite) run against the code that has the fix.

Releasing (tomorrow, 2026-10-15)

1. Merge this PR into develop. The develop preview, and so https://dev.handsontable.com/docs/hyperformula/, shows the docs at the new address right away. Nothing live changes yet.
2. Bring it to master, by one of these:
   • a quick release of develop. Today that also carries the EDATE fix (Fix EDATE returning 28 February instead of 29 February in leap years #1781), the only other change develop has over master;
   • a docs-only hotfix: a branch from master with git cherry-pick 0bf433df efba7bfd b58b4d61 7195670e 87ef9f97 cf44925c 14ff1098, merged to master and back to develop.
3. Workers Builds deploys master to the hyperformula-docs Worker in a few minutes. Then check:
   • curl -sI https://hyperformula.handsontable.com/docs/guide/basic-usage.html gives a 301 to https://handsontable.com/docs/hyperformula/guide/basic-usage.html;
   • https://handsontable.com/docs/hyperformula/ shows the docs.
4. Don't merge Migrate documentation to Astro Starlight (regenerated from current develop) #1791 (Astro Starlight) into develop before this is released, unless it adopts the same base first (see below). Otherwise the next release ships docs built for /docs/ again.

Not in this PR (follow-ups)

• Migrate documentation to Astro Starlight (regenerated from current develop) #1791 (Astro Starlight migration) must adopt the same base. In Starlight that's base: '/docs/hyperformula' with the output under cf-dist/docs/hyperformula/, plus this PR's _headers path and the Worker's former-address redirect.
• documentationUrl and description links in src/interpreter/functionMetadata/ (≈380 library strings, returned by getFunctionDetails) move with the next release, in Point the function catalogue's documentation links to handsontable.com/docs/hyperformula/ #1819. The redirects cover them until then.
• CHANGELOG.md keeps its historical links. They redirect.
• .github/workflows/publish.yml still sets cname: hyperformula.handsontable.com for GitHub Pages. Harmless.

Types of changes

• Breaking change (a fix or a feature because of which an existing functionality doesn't work as expected anymore)
• New feature or improvement (a non-breaking change that adds functionality)
• Bug fix (a non-breaking change that fixes an issue)
• Additional language file, or a change to an existing language file (translations)
• Change to the documentation

Related issues:

1. ClickUp: MRK-1436 Move HyperFormula docs to handsontable.com/docs/hyperformula/
2. The proxy on handsontable.com: handsontable/handsontable.com-v3#149 (merged and released); the site's links: handsontable/handsontable.com-v3#151; the old host's direct redirects from the launch: handsontable/handsontable.com-v3#152
3. Review: base changed to develop as requested

Checklist:

• I have reviewed the guidelines about Contributing to HyperFormula and I confirm that my code follows the code style of this project.
• I have signed the Contributor License Agreement.
• My change is compliant with the OpenDocument standard.
• My change is compatible with Microsoft Excel.
• My change is compatible with Google Sheets.
• I described my changes in the CHANGELOG.md file.
• My changes require a documentation update.
• My changes require a migration guide.

🤖 Generated with Claude Code

https://claude.ai/code/session_0137eVKg5r4aRcgL5MKhqKx7

[cloudflare-workers-and-pages]

Deploying with    Cloudflare Workers

The latest updates on your project. Learn more about integrating Git with Workers.

Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	hyperformula-docs	14ff109	Commit Preview URL Branch Preview URL	Oct 15 2026, 07:56 AM

[budnix]

Preview checks (https://docs-move-to-handsontable-com-hyperformula-docs.handsoncode.workers.dev, commit 00932e6), as browser navigations:

Address	Result
/docs/hyperformula/, /docs/hyperformula/guide/basic-usage.html, /docs/hyperformula/guide/basic-usage	200
/docs/hyperformula, /docs/hyperformula/api	301 to the trailing slash
/docs/hyperformula/nope.html	404, the VuePress 404 page
/docs/hyperformula/sitemap.xml, llms-full.txt, guide/basic-usage.md	200
/docs, /docs/	301 → https://handsontable.com/docs/hyperformula/
/docs/guide/basic-usage.html?x=1	301 → https://handsontable.com/docs/hyperformula/guide/basic-usage.html?x=1
/docs/api/classes/hyperformula.html, /docs/llms-full.txt, /docs/hyperformula_security_certificate.pdf	301 → same path under https://handsontable.com/docs/hyperformula/
/	302 → /docs/hyperformula/

Content:

• The sitemap lists 228 pages, all https://handsontable.com/docs/hyperformula/….
• llms-full.txt has the same 228 URLs.
• A guide page links only under /docs/hyperformula/ (332 links, 7 scripts).
• The hashed assets are served max-age=31536000, immutable.
• The built-in functions page links API pages as /docs/hyperformula/api/… (in-site).
• No page names workers.dev. The only remaining hyperformula.handsontable.com text is the sample data of a HYPERLINK example in the API reference, not a link.

Through handsontable.com (handsontable/handsontable.com-v3#149 run locally with wrangler dev --env production, pointed at this preview):

• /docs/hyperformula/… serves these docs, and their redirects come back onto the site's host.
• /docs/javascript-data-grid/ is still the Handsontable docs.
• /docs/hyperformula-security-certificate.pdf is still the site's own file.

🤖 Generated with Claude Code

[github-actions]

Performance comparison of head (14ff109) vs base (05c1a29)

                                     testName |    base |    head | change
--------------------------------------------------------------------------
                                      Sheet A |  486.55 |  493.17 | +1.36%
                                      Sheet B |  159.84 |  157.76 | -1.30%
                                      Sheet T |  138.75 |   139.3 | +0.40%
                                Column ranges |  474.67 |  473.34 | -0.28%
                                Sorted lookup | 13938.6 | 14540.6 | +4.32%
Sheet A:  change value, add/remove row/column |   15.82 |   14.88 | -5.94%
 Sheet B: change value, add/remove row/column |   133.8 |  126.96 | -5.11%
                   Column ranges - add column |  146.93 |  147.04 | +0.07%
                Column ranges - without batch |  450.42 |  448.92 | -0.33%
                        Column ranges - batch |  112.08 |  115.62 | +3.16%

[budnix]

About the red unit-tests / browser-tests: both failures are EDATE leap-year cases, for example "EDATE does not truncate the 29th day when the target month is a leap year February". They don't come from this PR, which touches only docs files, the docs Worker and the docs generator.

test/fetch-tests.sh looks for a branch of the same name in hyperformula-tests. When it finds none, it creates one from develop. develop's tests include the EDATE fix from #1781, which master (this PR's base) doesn't have yet.

If you want this PR green, create docs/move-to-handsontable-com in hyperformula-tests from its master and re-run the jobs. lint, build-docs and the Workers Builds preview pass.

🤖 Generated with Claude Code

[budnix]

The precondition is met (2026-10-14, 15:42 CEST). handsontable.com/docs/hyperformula* is now routed to the handsontable.com v3 Worker, which proxies it to this Worker:

$ curl -sI https://handsontable.com/docs/hyperformula/ | grep -i '^location'
(none: 404, this Worker's current /docs/ build answering)

The rest of handsontable.com is unchanged (still v2), and so is hyperformula.handsontable.com.

This PR can be merged to master now. Once its Workers Builds deploy finishes (a few minutes):

• handsontable.com/docs/hyperformula/ serves the docs;
• hyperformula.handsontable.com/docs/* redirects (301) to the same page there.

I also checked every old HyperFormula link the live Handsontable docs carry (14 distinct ones, current and older doc versions). Each lands on the right page and anchor through the new address, so the Handsontable docs need no change.

🤖 Generated with Claude Code

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Bugbot uses usage-based billing for this team and has hit its on-demand spend limit.

A team admin can raise the spend limit in the Cursor dashboard, or wait for the next billing cycle to continue.

[sequba]

@budnix we should not merge pull requests into master. We usually merge into develop and during the release process it goes into master. If it needs to land on master urgently we would need to release it either as a quick release or as a hotfix

[sequba]

All PRs should target develop

[budnix]

@sequba thanks, done. The PR now targets develop, rebuilt on top of it with the same two commits and no conflicts.

It needs to reach master tomorrow, 2026-10-15, when the new handsontable.com goes live. Either a quick release of develop or a docs-only hotfix works:

• develop differs from master only by the EDATE fix (Fix EDATE returning 28 February instead of 29 February in leap years #1781);
• the two commits also apply cleanly on master (git cherry-pick 0bf433df efba7bfd, checked).

The release needs nothing else from this PR:

• no CHANGELOG.md entry (docs infrastructure, as with Migrate the documentation deployment from Netlify to Cloudflare Workers #1719);
• script/release/ doesn't depend on the docs address.

Merging into develop changes nothing live. It only updates the develop preview, which staging uses. The steps and the checks to run after the master deploy are in the description, under "Releasing".

🤖 Generated with Claude Code

[budnix]

Re-checked on the develop-based build (commit efba7bf, preview version 4e00dfd3):

• All 228 pages and 720 distinct internal links: none leaves /docs/hyperformula/, and none names the old host. The only redirect is ../api's usual trailing slash. develop's new EDATE line in "List of differences" is in the build.
• "Merged and released before the handsontable.com launch": 26 old addresses (the 14 old HyperFormula links in the live Handsontable docs, plus /docs, the shortcuts, .md, llms-full.txt and the PDF) through hyperformula-website → this Worker → the handsontable.com proxy. 0 failures. Every page answers 200 with its #anchor present.
• From the launch on: the same 14 links through handsontable.com's own host rule, one 301 each. 0 failures.
• CI: build-docs, browser-tests and Workers Builds pass. The two jobs that failed against master now pass or are still running.

🤖 Generated with Claude Code

[sequba]

@budnix I see an inconsistence. Sometimes the changes url is https://handsontable.com/docs/hyperformula/ and sometimes it's https://handsontable.com/hyperformula/docs/. Please make sure that it's valid everywhere

[sequba]

It needs to reach master tomorrow, 2026-10-15, when the new handsontable.com goes live. Either a quick release of develop or a docs-only hotfix works

@budnix I'll do a hotfix today, so it will be live

[sequba]

@budnix check if this is a problem

worker/index.js:50: isFormerAddress only checks the path, so the old host serves new-base paths with a 200 instead of a 301 to handsontable.com.

Failure scenario: The hyperformula-website Worker still proxies all of /docs* here. A request for https://hyperformula.handsontable.com/docs/hyperformula/guide/basic-usage.html gets the full page with 200, not a 301. The same content is then indexable on two hosts, and the old host never fully drains. The Worker could check the forwarded host, or redirect every request that does not arrive through the handsontable.com proxy.

---

Generated by Claude Code

[sequba]

script/generate-builtin-functions-doc.ts:58: The fix rewrites URLs in generated output instead of fixing the source strings, and it assumes the page sits exactly one level below the docs root.

Failure scenario: src/interpreter/functionMetadata/categories/*.ts still holds about 384 links to https://hyperformula.handsontable.com/docs/ (370 documentationUrl, plus shortDescription links). getFunctionDetails users get old-host URLs that need two redirect hops. If the page moves out of guide/, the blind '../' substitution silently breaks every link. Fixing the strings in src, or rewriting to an absolute URL built from the build config, avoids both problems.

---

Generated by Claude Code

[sequba]

docs/README.md:30: The local setup step still points at http://localhost:8080/hyperformula/, while line 36 of the same file now says /docs/hyperformula/.

Failure scenario: A contributor follows step 5 after npm run docs:dev. They open localhost:8080/hyperformula/ and get a 404, because the base is now /docs/hyperformula/.

---

Generated by Claude Code

[sequba]

worker/index.js:30: BASE and HOME repeat base and hostname from docs/.vuepress/build.config.js; the path is also typed again in _headers and _redirects.

Failure scenario: If someone changes base in build.config.js and not here, the Worker treats the new base as a former address and 301s every docs page in a loop or to a 404. The Worker could import build.config.js, since wrangler bundles CommonJS.

---

Generated by Claude Code

[sequba]

docs/.vuepress/plugins/md-companions/index.js:21: The JSDoc for rebaseRootLinks still says the configured base is /docs/ (lines 21–28); the PR updated other comments in this file but not these.

Failure scenario: A maintainer reading the comment assumes the companions are rebased to /docs/. The actual base is /docs/hyperformula/, which makes debugging companion links harder.

---

Generated by Claude Code

[sequba]

docs/.vuepress/config.js:158: The favicon and manifest <link> tags in head use root-absolute /favicon/... paths. VuePress 1 does not add base to head hrefs, so after the move they point to handsontable.com's root, not this build's /docs/hyperformula/favicon/.

Failure scenario: On https://handsontable.com/docs/hyperformula/guide/basic-usage.html the browser requests https://handsontable.com/favicon/site.webmanifest and favicon-32x32.png from the Handsontable site, which serves a different icon or a 404. The PR's switch to relative icon paths in site.webmanifest therefore has no effect, because the browser never loads that manifest.

---

Generated by Claude Code

[sequba]

docs/README.md:118: The README still says llms-full.txt is at /docs/llms-full.txt. It is now at /docs/hyperformula/llms-full.txt.

Failure scenario: Fetching /docs/llms-full.txt on handsontable.com returns a 404, because that path belongs to the Handsontable docs app.

---

Generated by Claude Code

[sequba]

docs/README.md:37: The docs:build line still names /docs/.vuepress/dist as the output folder. The output is now docs/.vuepress/dist/docs/hyperformula.

Failure scenario: A developer looks for index.html and guide/ in dist and doesn't find them.

---

Generated by Claude Code

[budnix]

@sequba please hold the hotfix for a short while. I've just pushed b58b4d6, which addresses your review: the Worker reads the base from build.config.js, the build guards against base drift, every page gets a canonical link, and the README is fixed. Its preview has built, and a full re-verification is running now. I'll post the results and the per-comment answers here shortly.

For the hotfix, the commits to cherry-pick onto master are now three: git cherry-pick 0bf433df efba7bfd b58b4d61 (checked: they apply cleanly on master). The PR description is updated.

🤖 Generated with Claude Code

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Bugbot is paused — on-demand spend limit reached

Bugbot uses usage-based billing for this team and has hit its on-demand spend limit.

A team admin can raise the spend limit in the Cursor dashboard, or wait for the next billing cycle to continue.

[budnix]

Re-verified on the final build

@sequba thanks for the careful review. Everything is addressed in b58b4d6, 7195670, 87ef9f9 and cf44925, or answered below with evidence. For the hotfix, cherry-pick all six commits onto master:

git cherry-pick 0bf433df efba7bfd b58b4d61 7195670e 87ef9f97 cf44925c

They apply cleanly; the only difference from this branch is develop's EDATE fix.

Your comments

#	Comment	Status
1	DEV_DOCS.md:9: /docs/hyperformula/ vs /hyperformula/docs/	Consistent now. No /hyperformula/docs/ remains in the branch, its commits or the PR description; only the PR's first title used it, and it was renamed on 2026-10-14. The docs live at handsontable.com/docs/hyperformula/. The landing page is a different page: handsontable.com/hyperformula/ from today's launch (README, docs/index.md, package.json link it in a form that works on both sites; see cf44925).
2	worker/index.js: the old host serves /docs/hyperformula/* with a 200	True, short-lived, and now covered by a canonical link. Only hyperformula.handsontable.com/docs/hyperformula/… (nothing links there) is served. It ends when the hyperformula.handsontable.com/* route moves to the handsontable.com Worker after this release; that Worker 301s the path (handsontable.com-v3#152, released). The docs Worker itself can't tell its two callers apart: both fetch the same workers.dev host, and exact file matches are served before the script runs. Every page now carries <link rel="canonical" href="https://handsontable.com/docs/hyperformula/…">, so no copy is indexed in its place.
3	generator '../' and the library strings	The prefix is computed from the page's location now (b58b4d6). The ~384 library strings stay for the next release: getFunctionDetails returns them and hyperformula-tests pins them (unit/function-metadata-api.spec.ts). An old documentationUrl costs one 301 until then.
4	docs/README.md:30 local URL	Fixed.
5	worker/index.js: BASE/HOME typed again	Fixed. The Worker imports docs/.vuepress/build.config.js; wrangler/esbuild bundles it, as the previews prove. script/prepare-cf-assets.js now fails the Cloudflare build when: the base doesn't start and end with /; DOCS_BASE or DOCS_HOSTNAME differ from that file; the output isn't under the base; or _headers/_redirects have no rule naming it. All tested locally: each case fails and the real setup passes. The Workers Builds triggers set no environment variables.
6	md-companions JSDoc	Fixed.
7	config.js:158: favicon <link>s not prefixed	They are prefixed in the build: href="/docs/hyperformula/favicon/favicon-32x32.png", …/site.webmanifest etc. on every page, all 200, and the manifest's relative icons resolve to 200.
8	docs/README.md:118: llms-full.txt path	Fixed.
9	docs/README.md:37: docs:build output	Fixed.

Also fixed: docs/guide/setup-coding-agent.md still gave /docs/guide/basic-usage.md as the example .md address (7195670).

Verification

Four independent checks, plus a re-run of their scripts on the final code. The Cloudflare previews were cad133f1 and aa81f6de; cf44925 changes only four outbound links, checked on aa81f6de.

• Released before the new handsontable.com. Traced 275 old addresses through hyperformula-website → this Worker → handsontable.com: all 228 sitemap pages, the 14 links the live Handsontable docs carry, shortcuts, .md, llms-full.txt and the PDF.
  • 266/266 that work today still end in 200, with query strings kept and all 11 #anchors found.
  • At most 2 redirects, no loop, and nothing points back to hyperformula.handsontable.com.
  • Tested both as browser navigations and as plain requests.
  • The other 9 were already 404 today (made-up test paths).
• After the new handsontable.com, both routes on. 261/261 old addresses: one 301 each, then 200.
  • Every combination of the three Cloudflare routes was simulated. The only one that loops is "the handsontable.com/docs/hyperformula* route deleted while handsontable.com/* is off", and that's documented as never-delete.
• Build audit.
  • 228 pages and 736 internal links: 0 broken, none leaving the base.
  • One canonical per page, equal to its handsontable.com address. The canonical set equals the sitemap. The 404 page has none.
  • Every old page has its counterpart.
  • 257 hashed assets carry the immutable cache. .md is text/markdown.
  • Through the handsontable.com Worker, pages are byte-identical with security headers, and nothing mentions workers.dev.
• Code review. Safe to hotfix:
  • the bundled Worker matches the preview on every path;
  • all prepare-cf-assets checks ran on Cloudflare's build;
  • publish.yml and the release script don't depend on the base.
• Order. This can go out before or after today's new handsontable.com, and old addresses work either way. Releasing it first is better: the new site's HF docs links then work from its first minute.

Follow-ups, not blockers:

• move the library strings to the new address in the next release;
• in a later docs release, switch the logo back to handsontable.com/hyperformula/;
• api/globals.md has a relative ../../api/… link that already broke out of the docs folder before this PR;
• 9 llms-full.txt URL lines for page names containing a dot answer 404, as they do today.

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.28%. Comparing base (05c1a29) to head (14ff109).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1810   +/-   ##
========================================
  Coverage    97.28%   97.28%           
========================================
  Files          207      207           
  Lines        16218    16218           
  Branches      3588     3588           
========================================
  Hits         15777    15777           
  Misses         433      433           
  Partials         8        8           

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[sequba]

These changes were merged to master and develop in:
#1821
#1822