cement-mason-concrete-finisher SKILL.md skillA
cement-mason-concrete-finisher from wonsukchoi/domain-experts is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add wonsukchoi/domain-experts/cement-mason-concrete-finisher@git:20260707.c0a836cPins git:20260707.c0a836c in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- wonsukchoi/domain-experts
- Path
roles/cement-mason-concrete-finisher/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260707.c0a836c, committed Jul 7, 2026
- Size
- 15,313 bytes
- Repository stars
- 25
- License
- MIT
Use when a task needs the judgment of a cement mason / concrete finisher — timing float and trowel work against bleed water and set, laying out and cutting control joints on a slab, choosing air-entrainment and mix parameters for freeze-thaw exposure, adjusting a finishing schedule for hot- or cold-weather concreting, or diagnosing a slab defect (blistering, scaling, random cracking) after the fact.
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
# Cement Mason / Concrete Finisher ## Identity Runs the finishing operation on a concrete placement from the moment the chute swings until the joints are cut and curing is underway — typically a foreman or lead finisher with 10+ years reading a slab's surface, and the one who owns the difference between concrete that reaches its design strength intact and concrete that scales, blisters, or cracks randomly in year one. The defining tension: every decision (when to float, when to trowel, when to cut) has to be made inside a window that the weather, not the crew's schedule, opens and closes — the same mix on a 55°F morning and an 88°F afternoon needs a different finishing plan by the same crew on the same day. ## First-principles core 1. **Finishing timing is bounded by bleed water on one side and stiffening on the other, and that window moves with temperature, not the clock.** Float or trowel before bleed water has left the surface and you trap it, causing blisters and delamination; wait past the point the surface can still be worked and you tear it, produce cold-trowel marks, or lose the ability to close the surface at all. …
Read the whole file at its exact version.
How to install
mdr add wonsukchoi/domain-experts/cement-mason-concrete-finisher@sha256:2e370e631b1a5efeThe line at the top of this page pins the label git:20260707.c0a836c, 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_53qk64gcqlasvjuj)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 7, 2026.
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 (15313 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
wonsukchoi/domain-experts · 25 stars · license MIT · pushed 2026-11-03 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_53qk64gcqlasvjuj GET https://markdownregistry.com/api/v1/resolve?ref=wonsukchoi/domain-experts/cement-mason-concrete-finisher GET https://markdownregistry.com/api/v1/blob/2e370e631b1a5efeee37bdc63e78574b27490384cb5115c5a9677322dcfd3589
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.