formal-correctness SKILL.md skillA
formal-correctness from cdeust/zetetic-team-subagents is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add cdeust/zetetic-team-subagents/formal-correctness@git:20261021.4372ea9Pins git:20261021.4372ea9 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- cdeust/zetetic-team-subagents
- Path
skills/formal-correctness/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261021.4372ea9, committed Oct 21, 2026
- First version recorded
- Jul 22, 2026
- Size
- 3,023 bytes
- Repository stars
- 8
- License
- MIT
Prove it, don't test-and-hope. Use for concurrent or distributed code with no written spec, "how do we know this is correct?", interfaces that break when implementations are swapped, correctness argued by walking through example traces, wall-clock time used for ordering, or "can this be decided at all?".
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
# Formal Correctness **Problem shape:** correctness-critical code (concurrency, distribution, protocol, contract) whose failure modes tests cannot exercise. The move: specification before code, invariants before traces, contracts before implementations, decidability before optimization. ## Relevant geniuses | Agent | Use when | |---|---| | [lamport](../../agents/genius/lamport.md) | distributed design uses wall-clock ordering; no written spec; correctness argued by example executions; partial failure ignored | | [dijkstra](../../agents/genius/dijkstra.md) | code and correctness argument must be developed together; a construct defeats local reasoning; tests can't cover the failure mode | | [liskov](../../agents/genius/liskov.md) | swapping an implementation breaks callers; interfaces with types but no behavioral contract; composition breaks what components pass alone | | [turing](../../agents/genius/turing.md) | problem drowning in detail — reduce to the simplest machine; check decidability/complexity class before investing; vague concept needs an operational test | …
Read the whole file at its exact version.
How to install
mdr add cdeust/zetetic-team-subagents/formal-correctness@sha256:f750f68784ef688aThe line at the top of this page pins the label git:20261021.4372ea9, 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_frnfaj3vkcvhz3pf)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jul 22, 2026 and Oct 21, 2026, about one every 46 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261021.4372ea9 latest | 2026-10-21 | 4372ea9 | 3,023 B | A | view · diff |
| git:20260805.e8cc65e | 2026-08-05 | e8cc65e | 2,962 B | A | view · diff |
| git:20260722.b89f9c1 | 2026-07-22 | b89f9c1 | 2,933 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 (3023 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
cdeust/zetetic-team-subagents · 8 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_frnfaj3vkcvhz3pf GET https://markdownregistry.com/api/v1/resolve?ref=cdeust/zetetic-team-subagents/formal-correctness GET https://markdownregistry.com/api/v1/blob/f750f68784ef688aafc0088f9d93d56cbb4f8fa991607ac68d1fad77ed88b6d3
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.