Article
Finding the File: Localisation on SWE-bench Verified, Measured Against a Permuted-Query Floor
RiverRider
• Burton Lancaster PRO
RiverRider
AI & ML interests
Explainable AI
Recent Activity
repliedto their post about 11 hours ago
Motherlode is now the default memory reader on blackwindow.xyz and in Sunstone VS Code.
RiverRider/motherlode-code-small-en-v0.1 is a 33.4M-parameter embedding model for code and text with bge-small-en-v1.5's architecture, so it drops in where bge-small runs. In a replay of Black Window's engine as it ships, on the 411 SWE-bench Verified issues its contamination check leaves, it ranks the file the fix changed first for 207, where bge-small does for 158: 69 issues better, 20 worse, exact sign test p below 0.00001.
One engine, three places:
- blackwindow.xyz, in a browser tab, with no account and no install
- Sunstone 0.1.5 on the Visual Studio Marketplace, which indexes the folders you open in VS Code for any model in the picker
- a GPU box you rent from the page on your own vast ai account, whose pairing line adds the same box to Sunstone
Model: https://huggingface.co/RiverRider/motherlode-code-small-en-v0.1
Per-instance evidence: https://huggingface.co/datasets/RiverRider/motherlode-code-small-en-v0.1-evidence
Page: https://blackwindow.xyz
Sunstone: https://marketplace.visualstudio.com/items?itemName=sunstonenorth.sunstone
Update, 2026-09-29: about an hour after this went up, engine a3738ff took the lexical bonus off the search path, and blackwindow.xyz and Sunstone 0.1.6 ship it. As it ships now, on the same 411: 221 against 194, 59 better and 32 worse, sign p 0.0061. The 207 against 158 above is the engine with the bonus, which cost bge-small more than Motherlode (see the comments). updated a dataset about 16 hours ago
RiverRider/swebench-localisation updated a Space about 18 hours ago
RiverRider/motherlode-code-searchOrganizations
published an article 15 days ago
published an article 29 days ago
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Where the Hivemind Comes From: Geometry, Tuning and Format, Separated on Open Weights
RiverRider
• • 2 published an article about 1 month ago
Article
Frozen Backbones Read Each Other
RiverRider
•