writ SKILL.md skillB
writ from jlt-commons/writ is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jlt-commons/writ/writ@git:20261005.b23544fPins git:20261005.b23544f in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jlt-commons/writ
- Path
skills/writ/SKILL.md- Versions recorded
- 20
- Latest version
- git:20261005.b23544f, committed Oct 5, 2026
- First version recorded
- Sep 27, 2026
- Size
- 69,968 bytes
- Repository stars
- 16
- License
- Apache-2.0
Use when writing a writ spec -- the problem statement as a state graph and checkable laws about what code means and how it calls (writ.spec: spec/graph/refine/invariant/question/ann/data/law/assume/calls/flow/ machine/plan/elicit/obligations/attest) -- or its proof namespace (proof-of/lemma/hint), or the plain Clojure implementation it constrains, or when reading a writ.spec report or any "Writ:" error (purity, termination, ordering, arity, types, tagged data, failing, unproved, vacuous or…
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
# writ
writ checks plain Clojure against a spec of what the code is for. A spec
namespace is the problem statement in checkable form: it signs the public
fns and states laws about what their results mean. The implementation never
mentions writ. `(writ.spec/check 'my.spec)` runs Bend's static rules over
the implementation's source using those types, runs the laws, and then
checks that the laws actually pin the code down. It returns a report that
names what is wrong. writ runs on jolt; writ.spec uses test.check.
## Who owns what
- The spec (`spec`, `ann`, `data`, `law`) is the contract. A person or an
agent may write it; once written, it is the contract. Do not weaken a
law, loosen an `ann`, lower a `:require`, or delete any of them to get a
check to pass. If the spec looks wrong, say so and ask. Do not answer or
downgrade a blocking `question` yourself. `(spec/attest record 'my.spec)`
compares a recorded check with the spec now and names every way it got
weaker.
A spec may hold itself to a record, `(spec my.ns {:baseline "path"})`:
the check then fails on any weakening. Never write a new record to get
a check through; that is the owner's call.
…Read the whole file at its exact version.
How to install
mdr add jlt-commons/writ/writ@sha256:36bf5392398caa39The line at the top of this page pins the label git:20261005.b23544f, 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_sv66mdceqcivzhtq)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 20 versions of this file, between Sep 27, 2026 and Oct 5, 2026, more than one a day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261005.b23544f latest | 2026-10-05 | b23544f | 69,968 B | B | view · diff |
| git:20261005.e77c3a6 | 2026-10-05 | e77c3a6 | 69,020 B | B | view · diff |
| git:20261005.5c5d02c | 2026-10-05 | 5c5d02c | 68,864 B | B | view · diff |
| git:20261005.2e4d73d | 2026-10-05 | 2e4d73d | 68,675 B | B | view · diff |
| git:20261005.e6378ef | 2026-10-05 | e6378ef | 67,648 B | B | view · diff |
| git:20261003.8e8b804 | 2026-10-03 | 8e8b804 | 61,011 B | B | view · diff |
| git:20261001.14e0208 | 2026-10-01 | 14e0208 | 57,900 B | B | view · diff |
| git:20261001.af518bc | 2026-10-01 | af518bc | 57,640 B | B | view · diff |
| git:20261001.0531414 | 2026-10-01 | 0531414 | 57,324 B | B | view · diff |
| git:20261001.2964f6e | 2026-10-01 | 2964f6e | 57,133 B | B | view · diff |
| git:20260930.f36b86d | 2026-09-30 | f36b86d | 53,560 B | B | view · diff |
| git:20260930.8c83fdb | 2026-09-30 | 8c83fdb | 53,506 B | B | view · diff |
| git:20260929.8ba5904 | 2026-09-29 | 8ba5904 | 52,758 B | B | view · diff |
| git:20260929.1170a1b | 2026-09-29 | 1170a1b | 52,568 B | B | view · diff |
| git:20260929.94c3462 | 2026-09-29 | 94c3462 | 52,275 B | B | view · diff |
| git:20260927.80d0158 | 2026-09-27 | 80d0158 | 44,013 B | B | view · diff |
| git:20260927.b641aa7 | 2026-09-27 | b641aa7 | 43,038 B | B | view · diff |
| git:20260927.f12e43b | 2026-09-27 | f12e43b | 40,968 B | B | view · diff |
| git:20260927.20174e0 | 2026-09-27 | 20174e0 | 43,726 B | B | view · diff |
| git:20260927.a1d7d01 | 2026-09-27 | a1d7d01 | 42,751 B | B | view |
Audit of the latest version
- fail: No recursive delete of root, home or parent (matched: rm -rf ~/)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (69968 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 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
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
jlt-commons/writ · 16 stars · license Apache-2.0 · pushed 2026-11-05 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_sv66mdceqcivzhtq GET https://markdownregistry.com/api/v1/resolve?ref=jlt-commons/writ/writ GET https://markdownregistry.com/api/v1/blob/36bf5392398caa39e2fb92002a71cec8817fff175e40ce08e53cd1c994ce34a8
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.