deductive-verification-with-dafny-and-why3 SKILL.md skillA
This file is byte-identical to the first copy the registry indexed. Same content hash, so the same checks give both the same grade.
deductive-verification-with-dafny-and-why3 from outlinedriven/odin-claude-plugin is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add outlinedriven/odin-claude-plugin/deductive-verification-with-dafny-and-why3@git:20260912.6e06ed3Pins git:20260912.6e06ed3 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- outlinedriven/odin-claude-plugin
- Path
plugins/odin-formal/skills/deductive-verification-with-dafny-and-why3/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260912.6e06ed3, committed Sep 12, 2026
- First version recorded
- Sep 5, 2026
- Size
- 5,080 bytes
- Repository stars
- 40
- License
- Apache-2.0
Use when an imperative program needs pre-conditions, post-conditions, and loop invariants proved automatically by SMT in Dafny or Why3, short of a tactic prover.
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
# Deductive verification with Dafny and Why3 ## Contract | Field | Bound contract | |---|---| | Trigger | The task is to prove the pre-conditions, post-conditions, and loop invariants of imperative code with an SMT-backed prover: Dafny for annotate-then-verify on executable code, Why3 for multi-prover goals over WhyML. Methodology stays with proof-driven. | | Authority | Reversible local: writes only Dafny and WhyML source files, prover configuration, and session files under the project; rollback is version control. No remote mutation. | | Side effect | Local writes to annotated sources, the Why3 user configuration, and `.why3session.xml` proof sessions. No remote mutation. | | Done | The module verifies with no unproved obligations: `dafny verify` reports zero errors, or every Why3 goal is Valid and `why3 replay` re-confirms the session. | ## Inputs - Code to verify: Dafny sources (`.dfy`) or WhyML sources (`.mlw`), new or existing. - The property set: pre-conditions, post-conditions, loop invariants, and termination measures. …
Read the whole file at its exact version.
How to install
mdr add outlinedriven/odin-claude-plugin/deductive-verification-with-dafny-and-why3@sha256:17a181014acd8f51The line at the top of this page pins the label git:20260912.6e06ed3, 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_66kugcfkkxfjn4fi)
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Versions
The registry has recorded 2 versions of this file, between Sep 5, 2026 and Sep 12, 2026, about one every 7 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260912.6e06ed3 latest | 2026-09-12 | 6e06ed3 | 5,080 B | A | view · diff |
| git:20260905.f02db66 | 2026-09-05 | f02db66 | 5,049 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 (5080 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
outlinedriven/odin-claude-plugin · 40 stars · license Apache-2.0 · pushed 2026-09-29 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_66kugcfkkxfjn4fi GET https://markdownregistry.com/api/v1/resolve?ref=outlinedriven/odin-claude-plugin/deductive-verification-with-dafny-and-why3 GET https://markdownregistry.com/api/v1/blob/17a181014acd8f51269fedf2f7c6e62b0b712347042648ce9c32d32421f93c9b
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.
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