open-energy-transition · tgilon · Jul 30, 2026 · Jul 9, 2026 · Jul 13, 2026 · Jul 21, 2026
diff --git a/data/transmission_projects/nep/new_links.csv b/data/transmission_projects/nep/new_links.csv
@@ -11,7 +11,7 @@ DC41,Alfstedt/Niedersachsen,Hüffenhardt/Baden-Württemberg,2000.0,607,confirmed
 DC42,Sahms/Schleswig-Holstein,Böblingen/Baden-Württemberg,2000.0,737,confirmed,2037,True,"{""url"":""https://data.netzausbau.de/2037-2023/NEP/NEP_2037_2045_Bestaetigung.pdf"", ""status"":""confirmed"", ""origin"":""NEP"",""version"":2024,""location0"":""Sahms/Schleswig-Holstein"",""location1"":""Böblingen/Baden-Württemberg""",10.5331297,53.5252973,9.0113444,48.684969
 DC42plus,Sahms/Schleswig-Holstein,Trennfeld/Bayern,2000.0,546,confirmed,2037,True,"{""url"":""https://data.netzausbau.de/2037-2023/NEP/NEP_2037_2045_Bestaetigung.pdf"", ""status"":""confirmed"", ""origin"":""NEP"",""version"":2024,""location0"":""Sahms/Schleswig-Holstein"",""location1"":""Trennfeld/Bayern""",10.5331297,53.5252973,9.6151453,49.7950676
 DC1,Emden Ost,Osterath,2000,297,in_permitting,2027,True,"{url:https://www.netzentwicklungsplan.de/sites/default/files/2024-04/NEP_2037_2045_V2023_Anhang_2E_Aktualisierung_April_2024_%28komprimiert%29.pdf,TYNDP 2022:132,""location0"":""Emden Ost"",""location1"":""Osterath""",7.2492328,53.3655941,6.6207151,51.2690922
-DC2,Osterath,Philippsburg,2000,299,in_permitting,2026,False,"{url:https://www.netzentwicklungsplan.de/sites/default/files/2024-04/NEP_2037_2045_V2023_Anhang_2E_Aktualisierung_April_2024_%28komprimiert%29.pdf,TYNDP 2022: 254,""location0"":""Osterath"",""location1"":""Philippsburg""",6.6207151,51.2690922,7.5514555,48.9953996
+DC2,Osterath,Philippsburg,2000,299,in_permitting,2026,False,"{url:https://www.netzentwicklungsplan.de/sites/default/files/2024-04/NEP_2037_2045_V2023_Anhang_2E_Aktualisierung_April_2024_%28komprimiert%29.pdf,TYNDP 2022: 254,""location0"":""Osterath"",""location1"":""Philippsburg""",6.632180,51.254630,8.439514,49.254967
 DC3,Brunsbüttel,Großgartach,2000,694,in_permitting,2028,True,"{url:https://www.netzentwicklungsplan.de/sites/default/files/2024-04/NEP_2037_2045_V2023_Anhang_2E_Aktualisierung_April_2024_%28komprimiert%29.pdf,TYNDP 2022: 235,""location0"":""Brunsbüttel"",""location1"":""Großgartach""",9.1395423,53.8972549,9.1258701,49.1425406
 DC4,Wilster ,Bergrheinfeld,2000,540,in_permitting,2028,True,"{url:https://www.netzentwicklungsplan.de/sites/default/files/2024-04/NEP_2037_2045_V2023_Anhang_2E_Aktualisierung_April_2024_%28komprimiert%29.pdf,TYNDP 2022: 235,""location0"":""Wilster "",""location1"":""Bergrheinfeld""",9.3741366,53.9233519,10.1810033,50.0082136
 DC5,Wolmirstedt,Isar/Bayern,2000,539,in_permitting,2027,True,"{url:https://www.netzentwicklungsplan.de/sites/default/files/2024-04/NEP_2037_2045_V2023_Anhang_2E_Aktualisierung_April_2024_%28komprimiert%29.pdf,TYNDP 2022: 130, name:SuedOstLink,""location0"":""Wolmirstedt"",""location1"":""Isar/Bayern""",11.6267388,52.2484924,11.5745421,47.6691308

diff --git a/data/transmission_projects/tyndp2020/new_links.csv b/data/transmission_projects/tyndp2020/new_links.csv
@@ -8,7 +8,7 @@ TYNDP2020_5,planned_not_yet_permitting,407.0,2030,False,2000.0,"""url""=>""https
 TYNDP2020_6,under_construction,445.0,2026,True,600.0,"""url""=>""https://tyndp2020-project-platform.azurewebsites.net/projectsheets/transmission/28"", ""tyndp2020_proj_id""=>""28"", ""tyndp2020_invest_id""=>""1503"", ""tyndp_status""=>""under_construction""",14.028168,42.409263,18.772888,42.315909
 TYNDP2020_7,completed,240.0,2023,True,2000.0,"""url""=>""https://tyndp2020-project-platform.azurewebsites.net/projectsheets/transmission/247"", ""tyndp2020_proj_id""=>""247"", ""tyndp2020_invest_id""=>""1381"", ""tyndp_status""=>""in_permitting""",-1.05331400000001,50.900435,1.11373900000001,49.712937
 TYNDP2020_8,under_consideration,133.0,2027,True,700.0,"""url""=>""https://tyndp2020-project-platform.azurewebsites.net/projectsheets/transmission/1040"", ""tyndp2020_proj_id""=>""1040"", ""tyndp2020_invest_id""=>""1677"", ""tyndp_status""=>""under_consideration""",-5.80902099999999,54.726206,-4.880676,55.704677
-TYNDP2020_10,in_permitting,340.0,2024,False,2000.0,"""url""=>""https://tyndp2020-project-platform.azurewebsites.net/projectsheets/transmission/254"", ""tyndp2020_proj_id""=>""254"", ""tyndp2020_invest_id""=>""660"", ""tyndp_status""=>""in_permitting""",6.58493,51.245584,8.478699,49.283036
+TYNDP2020_10,in_permitting,340.0,2024,False,2000.0,"""url""=>""https://tyndp2020-project-platform.azurewebsites.net/projectsheets/transmission/254"", ""tyndp2020_proj_id""=>""254"", ""tyndp2020_invest_id""=>""660"", ""tyndp_status""=>""in_permitting""",6.632180,51.254630,8.439514,49.254967
 TYNDP2020_11,under_consideration,230.0,2025,True,1400.0,"""url""=>""https://tyndp2020-project-platform.azurewebsites.net/projectsheets/transmission/1049"", ""tyndp2020_proj_id""=>""1049"", ""tyndp2020_invest_id""=>""1706"", ""tyndp_status""=>""under_consideration""",0.763549999999995,51.403489,3.18054200000001,51.330612
 TYNDP2020_12,under_consideration,610.0,2028,True,1400.0,"""url""=>""https://tyndp2020-project-platform.azurewebsites.net/projectsheets/transmission/1050"", ""tyndp2020_proj_id""=>""1050"", ""tyndp2020_invest_id""=>""1707"", ""tyndp_status""=>""under_consideration""",0.482024999999987,51.519853,7.23587000000001,53.374317
 TYNDP2020_13,under_consideration,640.0,2028,True,1400.0,"""url""=>""https://tyndp2020-project-platform.azurewebsites.net/projectsheets/transmission/1051"", ""tyndp2020_proj_id""=>""1051"", ""tyndp2020_invest_id""=>""1708"", ""tyndp_status""=>""under_consideration""",1.30737299999999,52.593038,9.22851599999999,55.481188

diff --git a/doc/contributing.md b/doc/contributing.md
@@ -25,7 +25,7 @@ repository](https://github.com/open-energy-transition/open-tyndp) or to the [ups
 ## Setting up the development environment
 
 For linting, formatting and checking your code contributions
-against our guidelines (e.g. we use [Black](https://github.com/psf/black) as code style
+against our guidelines (e.g. we use [Ruff](https://github.com/astral-sh/ruff) as code style)
 use [pre-commit](https://pre-commit.com/index.html):
 
 1. Install [pixi](https://pixi.sh/latest/).

diff --git a/doc/faq.md b/doc/faq.md
@@ -0,0 +1,47 @@
+<!-- SPDX-FileCopyrightText: Contributors to PyPSA-Eur <https://github.com/pypsa/pypsa-eur> -->
+<!---->
+<!-- SPDX-License-Identifier: CC-BY-4.0 -->
+
+# FAQ
+
+## Snakemake `retrieve_*` rules fail with `SSL: CERTIFICATE_VERIFY_FAILED` error
+
+If your workflow fails while downloading input data (for example during `snakemake -n`), and you may see errors like this:
+
+```console
+$ pixi run snakemake -n --cores 1
+Building DAG of jobs...
+ConnectError while get'ing https://data.pypsa.org/workflows/eur/corine/v18_5/manifest.yaml
+[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self-signed certificate in certificate chain (_ssl.c:1032)
+...
+httpx.ConnectError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self-signed certificate in certificate chain (_ssl.c:1032)
+```
+
+This typically happens on networks where a university/company proxy intercepts HTTPS traffic and presents a different and incompletely configured SSL certificate.
+
+To inspect the certificate chain you actually receive for `data.pypsa.org`, run:
+
+```console
+pixi run openssl s_client -connect data.pypsa.org:443 -servername data.pypsa.org -showcerts </dev/null 2>/dev/null \
+| awk '/BEGIN CERTIFICATE/{i++} i{print > "/tmp/chain-cert-" i ".pem"} END{for (j=1;j<=i;j++) print "/tmp/chain-cert-" j ".pem"}' \
+| while read -r cert; do
+        echo "=== $cert ==="
+        openssl x509 -in "$cert" -noout -subject -issuer
+        openssl x509 -in "$cert" -noout -text \
+            | awk '
+                /Version:/ {print}
+                /Authority Key Identifier/ {print; getline; print}
+                /Subject Key Identifier/ {print; getline; print}
+            '
+    done
+```
+
+This certificate should be for `data.pypsa.org` and issued by a trusted certificate authority.
+If it is not and e.g. self-signed or issued by your organisation, then this can cause the error above.
+
+If the certificate chain is replaced by a proxy certificate, common fixes are:
+
+1. Run PyPSA-Eur from a network without that proxy (for example from home).
+2. Ask your IT department for help, they can either provide a proxy bypass or ensure that their proxy certificate is correctly configured and trusted by your system.
+
+This is usually faster than trying to disable certificate verification or hot fixes.
diff --git a/doc/release_notes.md b/doc/release_notes.md
@@ -81,10 +81,10 @@
 
 ## Upcoming PyPSA-Eur Release
 
+* fix: update stale contribution docs (linting and formatting ruff)
 * feat: data version CSV / YAML file can be specified separately or extended by the user in the `data.version_files` config entry ([#2016](https://github.com/PyPSA/pypsa-eur/issues/2016)).
-
 * Fix: Resolve plotting crashes from missing `tech_colors` entries by adding `heat dsm` color and implementing upfront validation for missing keys in `plot_summary.py` ([#2108](https://github.com/PyPSA/pypsa-eur/issues/2108)).
-
+* Fix: Retry interrupted WDPA and WDPA-marine downloads ([#2138](https://github.com/PyPSA/pypsa-eur/issues/2138)).
 * feat: Make the default target rule configurable (defaults to "all" for backwards compatibility)
 
 * Fix: Keep unset `p_set` (NaN) as NaN when aggregating components in `cluster_heat_buses`, required for [PyPSA#1703](https://github.com/PyPSA/PyPSA/pull/1703).
@@ -126,6 +126,12 @@
 
 - doc: Disable root TOC entries in order to declutter the table of contents for the rules overview ([2216](https://github.com/PyPSA/pypsa-eur/pull/2216)).
 
+* fix: Ensure `inflow_t` is always defined in `attach_hydro`, resolving a pylint use-before-assignment issue ([#2224](https://github.com/PyPSA/pypsa-eur/pull/2224)).
+* Add missing regex anchor with `re.fullmatch` to `create_zenodo_deposition_cli` utils script ([#2225](https://github.com/PyPSA/pypsa-eur/pull/2225)).
+
+* doc: Add FAQ section to docs (`faq.md`) with troubleshooting for `SSL: CERTIFICATE_VERIFY_FAILED` during data retrieval behind proxy servers ([#2228](https://github.com/PyPSA/pypsa-eur/pull/2228)).
+* Fix Ultranet (TYNDP 254) to end in Philippsburg (#2236)
+
 
 ## PyPSA-Eur v2026.02.0 (18th February 2026, merged 17th June 2026)