loss-backprop-lens SKILL.md skillA
loss-backprop-lens from corvinlabs/corvinos is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add corvinlabs/corvinos/loss-backprop-lens@git:20260915.459047ePins git:20260915.459047e in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- corvinlabs/corvinos
- Path
corvin_operator/bundle/skills/ldd/loss-backprop-lens/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260915.459047e, committed Sep 15, 2026
- Size
- 7,629 bytes
- Repository stars
- 24
- License
- Apache-2.0
Use when deciding whether to edit code at all, how large the edit should be, or whether a "working" fix actually generalizes. Applies when iterating on a failing test/run, chasing a flake, committing a sequence of small patches, or tempted to ship on one data point. Frames code changes as gradient steps and forbids overfitting to a single sample or a single test.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Loss-Backprop-Lens ## Overview Working on a codebase is **gradient descent on code**. A test / CI run / E2E is a **forward pass**. The difference between expected and actual is the **loss**. Every edit is a **step** toward lower loss. This is not a metaphor — it dictates which edits are admissible and which are noise injected into your parameters. **Core principle:** A fix that reduces training loss (the current failing test) but raises generalization loss (future unseen inputs or sibling tests) is **overfitting** and is rejected, regardless of whether CI turns green. This skill is a *mental frame*, not a rigid procedure. Apply it when one of the triggers below fires; combine with `root-cause-by-layer` for the mechanics of diagnosis. ## When to Use - You have **one failing signal** and are tempted to ship a fix - You've made **3+ small patches to the same area** in a short window - A test is **flaky** and you want to retry / widen / skip - A fix **works for this test** but you aren't sure about siblings - You're deciding between a **local tweak** and a **structural change** …
Read the whole file at its exact version.
How to install
mdr add corvinlabs/corvinos/loss-backprop-lens@sha256:96619d1bb87ac38cThe line at the top of this page pins the label git:20260915.459047e, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_tpikwxrt76x5arlm)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 15, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (7629 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
corvinlabs/corvinos · 24 stars · license Apache-2.0 · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_tpikwxrt76x5arlm GET https://markdownregistry.com/api/v1/resolve?ref=corvinlabs/corvinos/loss-backprop-lens GET https://markdownregistry.com/api/v1/blob/96619d1bb87ac38cad407247bfc29b187b5da4e66838786524c61214ed556ef3
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.