new-spec SKILL.md skillA
new-spec from ymm-oss/fsl is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ymm-oss/fsl/new-spec@git:20260828.927728fPins git:20260828.927728f in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ymm-oss/fsl
- Path
.claude/skills/new-spec/SKILL.md- Versions recorded
- 3
- Latest version
- git:20260828.927728f, committed Aug 28, 2026
- First version recorded
- Jul 3, 2026
- Size
- 1,345 bytes
- Repository stars
- 37
- License
- Apache-2.0
Author a new or substantially changed .fsl spec and take it through native check, bounded verification, induction where relevant, mutation, and vacuity evidence before completion.
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
# Author a meaningful FSL spec Read `skills/fsl/SKILL.md` and only its relevant topical reference before writing syntax. Use the working-tree native prefix: ```text cargo run --manifest-path rust/Cargo.toml -p fslc-rust --bin fslc -- ``` ## Gate 1. `check <spec>` for syntax and semantic diagnostics. 2. `verify <spec> --depth 8` or a justified bound for bounded evidence. 3. `verify <spec> --engine induction` when the intended claim is unbounded. 4. `mutate <spec>` to measure whether properties constrain behavior. 5. `verify <spec> --vacuity error` where applicable. 6. Run the focused corpus/command test required by the spec's dialect or example family. Do not hollow out a spec to dodge a counterexample. Confirm source requirements and exceptions before inventing behavior. Keep confirmed assumptions with the spec using established metadata. If FSL is the wrong tool for the behavior, say so rather than forcing a vacuous model. Changing a corpus file may affect contract or compatibility artifacts. Use their owning generator only after confirming the semantic change is intentional; never hand-edit a snapshot.
Read the whole file at its exact version.
How to install
mdr add ymm-oss/fsl/new-spec@sha256:50e9c1c0e0e6f5a0The line at the top of this page pins the label git:20260828.927728f, 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_acxwxweo6ccfsh4o)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jul 3, 2026 and Aug 28, 2026, about one every 28 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260828.927728f latest | 2026-08-28 | 927728f | 1,345 B | A | view · diff |
| git:20260713.90c0e23 | 2026-07-13 | 90c0e23 | 1,309 B | A | view · diff |
| git:20260703.bdabb9b | 2026-07-03 | bdabb9b | 2,223 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 (1345 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
ymm-oss/fsl · 37 stars · license Apache-2.0 · pushed 2026-11-03 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_acxwxweo6ccfsh4o GET https://markdownregistry.com/api/v1/resolve?ref=ymm-oss/fsl/new-spec GET https://markdownregistry.com/api/v1/blob/50e9c1c0e0e6f5a0702ef5d5a90b8865b727e30bb5c421d4c4ef4d1b7c6e9c4c
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.