logic-diff SKILL.md skillA
logic-diff from hyhmrright/logic-lens is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add hyhmrright/logic-lens/logic-diff@git:20260515.1220707Pins git:20260515.1220707 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- hyhmrright/logic-lens
- Path
skills/logic-diff/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260515.1220707, committed May 15, 2026
- First version recorded
- Apr 29, 2026
- Size
- 3,469 bytes
- Repository stars
- 25
- License
- MIT
Compare two code versions for semantic equivalence via semi-formal tracing of both versions side-by-side. Trigger when the user shares a refactor, rewrite, migration, or A/B implementation and wants to confirm behavior is unchanged — "did I break anything", "is this equivalent", "are these equivalent", "semantically equivalent", "are these two implementations semantically equivalent", "check my refactor", "same behavior after the change?", "does my rewrite produce the same output…
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
# Logic-Lens — Semantic Diff ## Setup Use lazy loading per `../_shared/common.md` §13: 1. Read `../_shared/common.md` only for language, Iron Law, Verdict header, scope routing, Remedy discipline, config fields, and loading budget. 2. Read only the relevant step in `logic-diff-guide.md` as you reach it. 3. Load `../_shared/logic-risks.md`, `../_shared/semiformal-guide.md`, `../_shared/semiformal-checklist.md`, and `../_shared/report-template.md` on demand when the current step needs them. ## Process **Step 0. Language + scope routing.** Detect language per `common.md` §1. Confirm two versions are provided. If only one version, switch to logic-review. **Step 1. Identify the shared specification** (guide Step 1) — what inputs should both versions handle; what outputs/side effects are expected. If the user states the refactor intentionally changed behavior in a specific area (e.g., "I changed the error path to raise instead of returning None"), record that as a **declared spec change** and treat divergences within that area as expected. Flag only divergences outside the declared change as findings. …
Read the whole file at its exact version.
How to install
mdr add hyhmrright/logic-lens/logic-diff@sha256:b8094708c5a4cbf8The line at the top of this page pins the label git:20260515.1220707, 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_fhvneyqgaq6u75ve)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Apr 29, 2026 and May 15, 2026, about one every 4 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260515.1220707 latest | 2026-05-15 | 1220707 | 3,469 B | A | view · diff |
| git:20260507.46cac5d | 2026-05-07 | 46cac5d | 3,447 B | A | view · diff |
| git:20260502.7610c6f | 2026-05-02 | 7610c6f | 3,327 B | A | view · diff |
| git:20260502.677a485 | 2026-05-02 | 677a485 | 3,006 B | A | view · diff |
| git:20260429.db6dc75 | 2026-04-29 | db6dc75 | 2,696 B | A | view |
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 (3469 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
hyhmrright/logic-lens · 25 stars · license MIT · pushed 2026-10-30 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_fhvneyqgaq6u75ve GET https://markdownregistry.com/api/v1/resolve?ref=hyhmrright/logic-lens/logic-diff GET https://markdownregistry.com/api/v1/blob/b8094708c5a4cbf8172f504aa14799cf8b4bac4d2adfcf985b9b1e2234ff12e5
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.