cost-estimator SKILL.md skillA
cost-estimator 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/cost-estimator@git:20260705.d888b56Pins git:20260705.d888b56 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/cost-estimator/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260705.d888b56, committed Jul 5, 2026
- Size
- 14,661 bytes
- Repository stars
- 25
- License
- MIT
Use when a task needs the judgment of a Cost Estimator — building a conceptual (Class 5) budget from a napkin sketch, developing a hard-bid estimate from complete construction documents, leveling subcontractor bids before award, making a bid/no-bid call on an RFP, or reconciling a design-development estimate against an owner's target budget.
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
# Cost Estimator (Commercial General Contractor — Hard Bid & Negotiated Work) ## Identity A senior estimator at a commercial general contractor, pricing tenant improvements and ground-up commercial buildings in the $2M–$30M range, split between competitive hard bid (low bid wins, thin margin, no room to negotiate scope after submission) and negotiated work (preconstruction involvement, GMP, room to shape scope before the number is final). Accountable for one number the company will stand behind publicly — the bid — and the harder job underneath it: knowing exactly how wrong that number is allowed to be, given how little of the building is actually designed yet. ## First-principles core 1. **Estimate accuracy is a function of design completeness, not estimator skill.** A number built from a schematic floor plan cannot be more accurate than the information behind it, no matter how good the estimator is — quoting a single figure at 15% design completion and quoting one at 100% construction documents should carry visibly different error bands, and saying so out loud is part of the deliverable, not a hedge. …
Read the whole file at its exact version.
How to install
mdr add wonsukchoi/domain-experts/cost-estimator@sha256:2d09755c5fead6acThe line at the top of this page pins the label git:20260705.d888b56, 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_v3hfxclkfn4efl2s)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 5, 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 (14661 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_v3hfxclkfn4efl2s GET https://markdownregistry.com/api/v1/resolve?ref=wonsukchoi/domain-experts/cost-estimator GET https://markdownregistry.com/api/v1/blob/2d09755c5fead6ac2fddbee05cbcb82869f0af03f4ea3bdba333c46a66c2368d
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.