diff --git a/.github/workflows/check-links.yml b/.github/workflows/check-links.yml
new file mode 100644
index 0000000..f2a6c33
--- /dev/null
+++ b/.github/workflows/check-links.yml
@@ -0,0 +1,91 @@
+name: Check links
+
+on:
+  pull_request:
+  push:
+    branches: [main]
+    paths: [links.js]
+  schedule:
+    # Weekly check of every link for ones that have gone stale (Monday, 9am aest/aedt)
+    - cron: '0 23 * * 0'
+  workflow_dispatch:
+
+jobs:
+  lint:
+    if: github.event_name != 'schedule'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write # push formatting fixes
+      pages: write # rebuild the site after fixing main
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          # PR branch so fixes can be pushed back to it
+          ref: ${{ github.head_ref || github.ref }}
+          # Optional PAT so fix commits re-trigger checks; falls back to the default token
+          token: ${{ secrets.LINKS_BOT_TOKEN || github.token }}
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      # The most common break from browser-based edits: a missing or extra comma
+      # between entries. Formatters can't fix this, so janky insert commas where an 
+      # entry/field ends and the next line starts a new key, and collapse doubled commas.
+      - name: Repair commas
+        run: |
+          if ! node --check links.js 2>/dev/null; then
+            perl -0pi -e "s/([}'\"])([ \t]*)(\r?\n\s*(?:['\"][^'\"\n]+['\"]|url|description)\s*:)/\$1,\$2\$3/g; s/,(\s*\n\s*),/,\$1/g" links.js
+          fi
+
+      - name: Format
+        run: npx --yes prettier@3 --write links.js
+
+      - name: Lint
+        run: npx --yes eslint@10 links.js
+
+      - name: Commit fixes
+        id: commit
+        if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
+        run: |
+          if git diff --quiet links.js; then exit 0; fi
+          git config user.name "github-actions[bot]"
+          git config user.email "41898283+github-actions[bot]@users.noreply.github.com"
+          git commit -m "Auto-fix links.js formatting" links.js
+          git push
+          echo "pushed=true" >> "$GITHUB_OUTPUT"
+
+      - name: Rebuild site
+        if: steps.commit.outputs.pushed == 'true' && github.event_name == 'push'
+        run: gh api -X POST "repos/${{ github.repository }}/pages/builds"
+        env:
+          GH_TOKEN: ${{ github.token }}
+
+      - name: Fail if fork PR needs fixes
+        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name != github.repository
+        run: git diff --exit-code links.js
+
+  links:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      # On PRs/pushes only check lines that were added, so an unrelated dead
+      # link doesn't block someone adding theirs. Scheduled runs check everything.
+      - name: Pick what to check
+        id: target
+        run: |
+          case "${{ github.event_name }}" in
+            pull_request) base="origin/${{ github.base_ref }}" ;;
+            push)         base="${{ github.event.before }}" ;;
+            *)            echo "input=links.js" >> "$GITHUB_OUTPUT"; exit 0 ;;
+          esac
+          git diff "$base" -- links.js | grep '^+' | grep -v '^+++' > added-lines.txt || true
+          echo "input=added-lines.txt" >> "$GITHUB_OUTPUT"
+
+      - uses: lycheeverse/lychee-action@v2
+        with:
+          args: --config lychee.toml --no-progress ${{ steps.target.outputs.input }}
+          fail: true
diff --git a/.prettierrc.json b/.prettierrc.json
new file mode 100644
index 0000000..f2c3824
--- /dev/null
+++ b/.prettierrc.json
@@ -0,0 +1,5 @@
+{
+  "singleQuote": true,
+  "quoteProps": "preserve",
+  "printWidth": 1000
+}
diff --git a/README.md b/README.md
index 9a5e26e..e4cf4a1 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,8 @@ Edit [links.js](links.js) and add an entry to the `REDIRECTS` object:
 The shortlink will be live at `sih.tools/shortcut` as soon as the change is merged.
 
 > **Note:** Every entry in the object must be followed by a comma, including the one before your new entry. Missing commas will break all redirects.
+>
+> A GitHub Action checks every change to `links.js`: it adds missing commas, fixes formatting (committing the fix back to your branch), flags duplicate shortlinks, and checks that new URLs aren't broken. If a check fails, see the **Actions** tab or the PR's checks for the line to fix.
 
 Shortlinks can be hierarchical — slashes in the key create nested URLs:
 
diff --git a/eslint.config.mjs b/eslint.config.mjs
new file mode 100644
index 0000000..d738b25
--- /dev/null
+++ b/eslint.config.mjs
@@ -0,0 +1,11 @@
+// Lints links.js only (checked in CI by .github/workflows/check-links.yml)
+export default [
+  {
+    files: ['links.js'],
+    languageOptions: { sourceType: 'script', ecmaVersion: 'latest' },
+    rules: {
+      'no-dupe-keys': 'error',
+      'comma-dangle': 'off',
+    },
+  },
+];
diff --git a/links.js b/links.js
index b30ee4d..b771d9f 100644
--- a/links.js
+++ b/links.js
@@ -2,155 +2,155 @@
 const REDIRECTS = {
   'aigis': {
     url: 'https://github.com/Sydney-Informatics-Hub/aigis/blob/main/README.md',
-    description: 'Geospatial data with Gen-AI - Sydney Informatics Hub'
+    description: 'Geospatial data with Gen-AI - Sydney Informatics Hub',
   },
   'alphafold3': {
     url: 'https://sydney-informatics-hub.github.io/gpu-cluster-onboarding-guide/notebooks/alphafold3_guide.html',
-    description: 'Guide to run AlphaFold3 on the Apollo GPU cluster'
+    description: 'Guide to run AlphaFold3 on the Apollo GPU cluster',
   },
   'apollo-launch': {
     url: 'https://sydney-informatics-hub.github.io/apollo-launch/',
-    description: 'Program for the official launch event of the Apollo GPU cluster on 3rd September 2026'
+    description: 'Program for the official launch event of the Apollo GPU cluster on 3rd September 2026',
   },
   'appn': {
     url: 'https://www.plantphenomics.org.au/our-nodes/university-of-sydney',
-    description: 'University of Sydney node of the Australian Plant Phenomics Facility - Sydney Informatics Hub'
+    description: 'University of Sydney node of the Australian Plant Phenomics Facility - Sydney Informatics Hub',
   },
   'biocommons-access': {
     url: 'https://www.biocommons.org.au/access',
-    description: 'Biocommons Access service developed by the BioCloud team at Sydney Informatics Hub'
+    description: 'Biocommons Access service developed by the BioCloud team at Sydney Informatics Hub',
   },
   'bioshell-guide': {
     url: 'https://sydney-informatics-hub.github.io/BioShell-User-Guide/',
-    description: 'Documentation to request access and use BioShell - A command-line environment built for life sciences research'
+    description: 'Documentation to request access and use BioShell - A command-line environment built for life sciences research',
   },
   'bio': {
     url: 'https://github.com/Sydney-Informatics-Hub/Bioinformatics',
-    description: 'SIH bioinformatics resources and tools'
+    description: 'SIH bioinformatics resources and tools',
   },
   'bio-omicscalculator': {
     url: 'https://sydney-informatics-hub.github.io/omics-calculator/metadata-calculator.html',
-    description: 'Bioinformatics metadata analysis tool'
+    description: 'Bioinformatics metadata analysis tool',
   },
   'bio-training': {
     url: 'https://sydney-informatics-hub.github.io/bioinformatics-training/',
-    description: 'SIH bioinformatics training'
+    description: 'SIH bioinformatics training',
   },
   'bio101-workshop': {
     url: 'https://sydney-informatics-hub.github.io/bio101-workshop/',
-    description: 'Bioinformatics 101 workshop materials'
+    description: 'Bioinformatics 101 workshop materials',
   },
   'bio101-survey-2026': {
     url: 'https://redcap.sydney.edu.au/surveys/?s=FJ33MYNCRR&training=106&training_date=2026-09-17',
-    description: 'Bioinformatics 101 workshop survey'
+    description: 'Bioinformatics 101 workshop survey',
   },
   'blockparty': {
     url: 'https://sydney-informatics-hub.github.io/blockparty/',
-    description: 'Unicode drawing tool'
+    description: 'Unicode drawing tool',
   },
   'chat': {
     url: 'https://rds-core-sih4hpc-rw-openwebui.gpu.sydney.edu.au',
-    description: 'Internal OpenWebUI chat server  (needs VPN to access)'
+    description: 'Internal OpenWebUI chat server  (needs VPN to access)',
   },
   'CBI-R': {
     url: 'https://sydney-informatics-hub.github.io/cbir-screening-tool/',
-    description: 'Online Screening Tool for the Cambridge Behavioural Inventory-Revised (CBI-R)'
+    description: 'Online Screening Tool for the Cambridge Behavioural Inventory-Revised (CBI-R)',
   },
   'client-dashboard': {
     url: 'https://app.powerbi.com/groups/6d62871b-a2c5-4c79-bb85-75eb03e90a2d/reports/700a9b42-6a01-44ce-ac7f-a7e0eeeffc35?ctid=82b3e37e-8171-485d-b10b-38dae7ed14a8',
-    description: 'SIH Client Dashboard'
+    description: 'SIH Client Dashboard',
   },
   'nhmrc-grants-2026': {
     url: 'https://sydney.au1.qualtrics.com/jfe/form/SV_6lFIfPlKRKplg3A',
-    description: 'USyd Collaborative Equipment Grants and NHMRC Equipment Grants Scheme'
+    description: 'USyd Collaborative Equipment Grants and NHMRC Equipment Grants Scheme',
   },
   'cc': {
     url: 'https://ardc.edu.au/project/curated-collections-for-enduring-hass-indigenous-data/',
-    description: 'Curated Collections, a national digital humanities collection building platform based upon Omeka S, developed by Sydney Informatics Hub in partnership with the ARDC, Systemik and USyd FASS.'
-  },  
+    description: 'Curated Collections, a national digital humanities collection building platform based upon Omeka S, developed by Sydney Informatics Hub in partnership with the ARDC, Systemik and USyd FASS.',
+  },
   'forwards-plan': {
     url: 'https://unisyd.sharepoint.com/:x:/r/teams/SydneyInformaticsHub2/Shared Documents/1 SIH Central Document Repository/Team Folders/Informatics/Group Leads/Team management/TeamForwardPlanning2025onwards.xlsx?web=1',
-    description: 'SIH Informatics Team Forwards Plan'
+    description: 'SIH Informatics Team Forwards Plan',
   },
   'github-external': {
     url: 'https://github.com/Sydney-Informatics-Hub',
-    description: 'Public SIH GitHub organization'
+    description: 'Public SIH GitHub organization',
   },
   'github-internal': {
     url: 'https://github.sydney.edu.au/informatics',
-    description: 'Internal SIH GitHub organization'
+    description: 'Internal SIH GitHub organization',
   },
   'globus/docs': {
     url: 'https://sydneyuni.atlassian.net/wiki/spaces/RC/pages/4392878084/Globus',
-    description: 'Globus technical documentation on confluence'
+    description: 'Globus technical documentation on confluence',
   },
   'gpu/docs': {
     url: 'https://sydneyuni.atlassian.net/wiki/x/AYBd1Q',
-    description: 'Apollo GPU cluster documentation, information and specifications'
+    description: 'Apollo GPU cluster documentation, information and specifications',
   },
   'gpu/pricing': {
     url: 'https://sydneyuni.atlassian.net/wiki/x/DYBgGgE',
-    description: 'Apollo GPU cluster pricing, rates and billing'
+    description: 'Apollo GPU cluster pricing, rates and billing',
   },
   'gpu/policies': {
     url: 'https://sydneyuni.atlassian.net/wiki/x/mwWHEgE',
-    description: 'Apollo GPU cluster access policies'
+    description: 'Apollo GPU cluster access policies',
   },
   'gpu/onboarding': {
     url: 'https://dashr.sydney.edu.au',
-    description: 'Apollo GPU cluster onboarding for your research project in DashR portal'
+    description: 'Apollo GPU cluster onboarding for your research project in DashR portal',
   },
   'gpu/login': {
     url: 'https://gpu.sydney.edu.au',
-    description: 'Apollo GPU cluster user interface (RunAI). Requires on-campus network access or VPN.'
+    description: 'Apollo GPU cluster user interface (RunAI). Requires on-campus network access or VPN.',
   },
   'gpu/guide': {
     url: 'https://sydney-informatics-hub.github.io/gpu-cluster-onboarding-guide/',
-    description: 'Apollo GPU cluster onboarding guide and tutorials'
+    description: 'Apollo GPU cluster onboarding guide and tutorials',
   },
   'hacky-hour-zoom': {
     url: 'https://uni-sydney.zoom.us/my/sih.hackyhour',
-    description: 'Zoom link for our monthly SIH Hacky Hour, on the 3rd Wednesday of every month at 2pm.'
-  },  
+    description: 'Zoom link for our monthly SIH Hacky Hour, on the 3rd Wednesday of every month at 2pm.',
+  },
   'hf': {
     url: 'https://huggingface.co/SIH',
-    description: 'SIH Hugging Face organization page'
+    description: 'SIH Hugging Face organization page',
   },
   'hpc/docs': {
     url: 'https://sydneyuni.atlassian.net/wiki/spaces/RC/pages/3448733944/Sydney+HPC+Scheme',
-    description: 'Sydney HPC Scheme Confluence page'
+    description: 'Sydney HPC Scheme Confluence page',
   },
   'hpc/costs': {
     url: 'https://intranet.sydney.edu.au/research-support/managing-research/research-computing.html#cost',
-    description: 'University of Sydney High Performance Computing Cost Tables'
+    description: 'University of Sydney High Performance Computing Cost Tables',
   },
   'hpc/chat': {
     url: 'https://app.cogniti.ai/agents/68099883ab29fb8c2af4154d/chat?k=e8f0C6vSYYuEh40obfkH3IRxlwGDrM6T1bCYXyknfm4',
-    description: 'University of Sydney High Performance Computing AI Chat Assistant'
+    description: 'University of Sydney High Performance Computing AI Chat Assistant',
   },
   'hpc/dropin': {
     url: 'https://uni-sydney.zoom.us/j/85100208525?from=addon',
-    description: 'Zoom link for our monthly HPC drop-in sessions, on the 1st Thursday of every month at 12pm.'
+    description: 'Zoom link for our monthly HPC drop-in sessions, on the 1st Thursday of every month at 12pm.',
   },
   'hpc/nci': {
     url: 'https://nci.sydney.edu.au/',
-    description: 'Sydney national HPC scheme administration portal'
+    description: 'Sydney national HPC scheme administration portal',
   },
   'hpc/nci-variable-scheme': {
     url: 'https://sydneyuni.atlassian.net/wiki/spaces/RC/pages/3722018879/Power+Users#Purchased-KSU',
-    description: 'NCI variable scheme instructions for purchasing additional KSU'
+    description: 'NCI variable scheme instructions for purchasing additional KSU',
   },
   'hpc/policies': {
     url: 'https://sydneyuni.atlassian.net/wiki/spaces/RC/pages/4605805979/Policies',
-    description: 'Sydney HPC Scheme policies'
+    description: 'Sydney HPC Scheme policies',
   },
   'ipa-guide': {
     url: 'https://github.com/Sydney-Informatics-Hub/IPA-user-guide/blob/main/20260616%20IPA%20user%20guide.pdf',
-    description: 'Ingenuity Pathway Analysis User Guide'
-  },  
+    description: 'Ingenuity Pathway Analysis User Guide',
+  },
   'jira': {
     url: 'https://ctdshub.atlassian.net/jira/software/c/projects/PIPE/boards/27',
-    description: 'SIH JIRA Project management and issue tracking'
+    description: 'SIH JIRA Project management and issue tracking',
   },
   'jira-data-entry': {
     url: 'https://sydney.au1.qualtrics.com/jfe/form/SV_9LxgSqP0TjNwOXA',
@@ -158,138 +158,137 @@ const REDIRECTS = {
   },
   'label': {
     url: 'http://10.122.246.109:8080/',
-    description: 'Labelstudio deployment (needs VPN to access)'
+    description: 'Labelstudio deployment (needs VPN to access)',
   },
   'ldaca': {
     url: 'https://milysun.github.io/wordflow-workshop/',
-    description: 'Wordflow Workshops Landing Page'
+    description: 'Wordflow Workshops Landing Page',
   },
   'leave': {
     url: 'https://unisyd.sharepoint.com/:x:/r/teams/SydneyInformaticsHub2/Shared%20Documents/1%20SIH%20Central%20Document%20Repository/Admin/Leave%20and%20Travel%20Schedule/SIH_Annual_Leave_and_Business_Travel_Schedule_2026.xlsx?d=wdb8cbe2e7e614bb9889bc5a8136722e1&csf=1&web=1&e=aSUUBA',
-    description: 'SIH Leave Calendar 2026'
+    description: 'SIH Leave Calendar 2026',
   },
   'mailing-list': {
     url: 'https://signup.e2ma.net/signup/1945889/1928048/',
-    description: 'Sydney Informatics Hub News + Training Mailing lists signup page'
+    description: 'Sydney Informatics Hub News + Training Mailing lists signup page',
   },
   'materials': {
     url: 'https://unisyd.sharepoint.com/teams/SydneyInformaticsHub2/Share',
-    description: 'SIH shared training materials and other university-wide shared documents'
+    description: 'SIH shared training materials and other university-wide shared documents',
   },
   'monday-update': {
     url: 'https://ctdshub.atlassian.net/wiki/spaces/INFRA/pages/602537987/Monday+Meeting+Project+Update+Presentation+Roster',
-    description: 'SIH Monday fortnightly meeting 5-min Project Update Calendar'
+    description: 'SIH Monday fortnightly meeting 5-min Project Update Calendar',
   },
   'navigator': {
     url: 'https://app.cogniti.ai/agents/6539de2436d0b628561cad9c/chat?k=tz0LR06KDQMgOaq507-pvaSrCzGwfCHjo829dJLTM4s',
-    description: 'University of Sydney Core Research Facility Navigator Chatbot'
+    description: 'University of Sydney Core Research Facility Navigator Chatbot',
   },
   'hpc/nci-access': {
     url: 'https://sydneyuni.atlassian.net/wiki/spaces/RC/pages/3722182703/NCI+Gadi+HPC',
-    description: 'NCI access via Sydney HPC Scheme'
+    description: 'NCI access via Sydney HPC Scheme',
   },
   'nci-su-calculator': {
     url: 'https://sydney-informatics-hub.github.io/nci-su-calculator/',
-    description: 'Service unit calculator for NCI Gadi HPC'
+    description: 'Service unit calculator for NCI Gadi HPC',
   },
   'pawsey-onboarding': {
     url: 'https://sydney.au1.qualtrics.com/jfe/form/SV_5mXyhFZsPIwZDBs?SupportType=Pawsey',
-    description: 'Pawsey Setonix HPC onboarding form'
+    description: 'Pawsey Setonix HPC onboarding form',
   },
   'hpc/pawsey-usyd-guide': {
     url: 'https://sydney-informatics-hub.github.io/usyd-pawsey-onboarding-guide/',
-    description: 'Pawsey Setonix HPC guide for USyd'
+    description: 'Pawsey Setonix HPC guide for USyd',
   },
   'hpc/pawsey-usyd-docs': {
     url: 'https://sydneyuni.atlassian.net/wiki/spaces/RC/pages/3774775342/Pawsey+Setonix+HPC',
-    description: 'Pawsey Setonix HPC documentation for USyd'
+    description: 'Pawsey Setonix HPC documentation for USyd',
   },
   'ref-check': {
     url: 'https://github.com/Sydney-Informatics-Hub/RefCheckAI',
-    description: 'SIH AI Reference Checker: Automated citation validation for AI-generated and academic content.'
-  },  
+    description: 'SIH AI Reference Checker: Automated citation validation for AI-generated and academic content.',
+  },
   'request': {
     url: 'https://sydney.au1.qualtrics.com/jfe/form/SV_5mXyhFZsPIwZDBs',
-    description: 'Sydney Informatics Hub request for assistance form.'
+    description: 'Sydney Informatics Hub request for assistance form.',
   },
   'research-compute-guides': {
     url: 'https://sydneyuni.atlassian.net/wiki/spaces/RC/overview?homepageId=173932782',
-    description: 'Technical documentation for research computing infrastructure at Sydney'
+    description: 'Technical documentation for research computing infrastructure at Sydney',
   },
   'research-compute-tools': {
     url: 'https://github.com/Sydney-Informatics-Hub/research-computing-tools',
-    description: 'SIH research computing resources and tools'
+    description: 'SIH research computing resources and tools',
   },
   'research-pulse': {
     url: 'https://github.com/Sydney-Informatics-Hub/ResearchPulseAI',
-    description: 'ResearchPulseAI: AI-driven Research Impact Assessment Tool and Case Study Generator for NSW Health'
+    description: 'ResearchPulseAI: AI-driven Research Impact Assessment Tool and Case Study Generator for NSW Health',
   },
   'sharepoint': {
     url: 'https://unisyd.sharepoint.com/:f:/r/teams/SydneyInformaticsHub2/Shared Documents/1 SIH Central Document Repository',
-    description: 'SIH Central document repository'
+    description: 'SIH Central document repository',
   },
   'sih-sharepoint-site': {
     url: 'https://unisyd.sharepoint.com/teams/SydneyInformaticsHub2/SitePages/00_landing_page.aspx',
-    description: 'SIH Staff Home (previously confluence)'
+    description: 'SIH Staff Home (previously confluence)',
   },
   'skill': {
     url: 'https://github.sydney.edu.au/informatics/trainingmaterials/tree/master/CrossSkilling',
-    description: 'SIH Cross-skilling calendar + materials'
+    description: 'SIH Cross-skilling calendar + materials',
   },
-  'src':{
+  'src': {
     url: 'https://intranet.sydney.edu.au/research-support/managing-research/facilities-and-tools/sydney-research-cloud.html',
-    description: 'Sydney Research Cloud information on the Intranet'
+    description: 'Sydney Research Cloud information on the Intranet',
   },
   'stats': {
     url: 'https://sydney-informatics-hub.github.io/stats-resources/',
-    description: 'SIH Statistics and data analysis resources'
+    description: 'SIH Statistics and data analysis resources',
   },
   'structural-biology-platform': {
     url: 'https://www.biocommons.org.au/structural-biology-platform',
-    description: 'Structural Biology workflow service developed by Sydney Informatics Hub in partnership with the Australian Biocommons and UNSW'
+    description: 'Structural Biology workflow service developed by Sydney Informatics Hub in partnership with the Australian Biocommons and UNSW',
   },
   'team-guides': {
     url: 'https://unisyd.sharepoint.com/:f:/r/teams/SydneyInformaticsHub2/Shared Documents/1 SIH Central Document Repository/Team Folders/Informatics/Team Guides',
-    description: 'SIH Informatics Team Guides'
+    description: 'SIH Informatics Team Guides',
   },
   'things': {
     url: 'https://www.youtube.com/watch?v=dQw4w9WgXcQ',
-    description: 'Important things'
+    description: 'Important things',
   },
   'training': {
     url: 'https://www.sydney.edu.au/research/facilities/sydney-informatics-hub/workshops-and-training/training-calendar.html',
-    description: 'Training calendar'
+    description: 'Training calendar',
   },
   'training-dashboard': {
     url: 'https://app.powerbi.com/links/ZTQdGqm_Uk',
-    description: 'SIH Training Dashboard'
+    description: 'SIH Training Dashboard',
   },
   'upcoming': {
     url: 'https://unisyd.sharepoint.com/:l:/r/teams/SydneyInformaticsHub2/Lists/Upcoming Informatics Team Events?e=cdJqwB',
-    description: 'Upcoming Informatics Team Events'
+    description: 'Upcoming Informatics Team Events',
   },
   'vm-register': {
     url: 'https://unisyd.sharepoint.com/:x:/r/teams/SydneyInformaticsHub2/Shared Documents/1 SIH Central Document Repository/Team Folders/Informatics/VM and asset management/VM register.xlsx?web=1',
-    description: 'SIH team VM register'
+    description: 'SIH team VM register',
   },
   'wimr-consult': {
     url: 'https://outlook.office.com/book/StatisticalConsultwithAlexandraGreenandAmarinderThind@unisyd.onmicrosoft.com/?ismsaljsauthenabled',
-    description: 'WIMR biostatistics consult booking form'
+    description: 'WIMR biostatistics consult booking form',
   },
   'wordflow': {
     url: 'https://australian-text-analytics-platform.github.io/LDaCa_Text_Analytics_Tools/',
-    description: 'LDaCA Wordflow Landing Page'
+    description: 'LDaCA Wordflow Landing Page',
   },
   'youtube': {
     url: 'https://www.youtube.com/@sydneyinformaticshub',
-    description: 'Sydney Informatics Hub - YouTube'
+    description: 'Sydney Informatics Hub - YouTube',
   },
 };
 
-// Template:
-//,
+// Template: copy the lines below (including the final comma), paste them
+// above the `};` line and remove the leading `//`. Order doesn't matter.
 //  'shortlink': {
-//    url:'',
-//    description:''
-//     }
-//
+//    url: 'https://example.com',
+//    description: 'What this link is',
+//  },
diff --git a/lychee.toml b/lychee.toml
new file mode 100644
index 0000000..adb92a6
--- /dev/null
+++ b/lychee.toml
@@ -0,0 +1,16 @@
+# Broken-link checker config (https://lychee.cli.rs)
+# 401/403/429 usually mean "needs login" or rate-limiting, not a dead link.
+accept = ["100..=103", "200..=299", "401", "403", "429"]
+max_retries = 2
+timeout = 20
+user_agent = "Mozilla/5.0 (compatible; sih-links-checker)"
+
+# Internal / login-only hosts that can't be reached from GitHub's runners.
+exclude_all_private = true
+exclude = [
+  'sydney\.edu\.au',
+  'sharepoint\.com',
+  'office\.com',
+  'powerbi\.com',
+  'atlassian\.net',
+]