feasibility-study SKILL.md skillA
feasibility-study from sd0xdev/sd0x-harness is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add sd0xdev/sd0x-harness/feasibility-study@git:20260905.7f65168Pins git:20260905.7f65168 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- sd0xdev/sd0x-harness
- Path
skills/feasibility-study/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260905.7f65168, committed Sep 5, 2026
- First version recorded
- Mar 9, 2026
- Size
- 7,573 bytes
- Repository stars
- 194
- License
- MIT
Feasibility analysis from first principles. Use when: evaluating solutions before tech-spec, comparing approaches, risk assessment. Not for: implementation (use feature-dev), architecture advice (use codex-architect). Output: quantitative comparison + recommendation.
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
# Feasibility Study Skill
## Supplementary Agent
For each solution option, dispatch background exploration:
Agent({
description: "Explore feasibility of solution option",
subagent_type: "feasibility-analyst",
prompt: `Research the feasibility of: <solution description>
Evaluate technical feasibility, effort, risk, extensibility, and maintenance cost.`
})
## Trigger
- Keywords: feasibility, is this possible, can we, should we, explore options, before tech spec
## When NOT to Use
- Already have a tech spec (use `/deep-analyze`)
- Need implementation, not analysis (use `/codex-implement`)
- Quick question (use `/codex-explain` or `/codex-architect`)
## Workflow
```
Resolve → Decompose → Constraints → Code research → Solutions → Codex discussion → Decision → Report
```
### Phase 0: Resolve the feature context
The sets Phase 1 reads have to come from somewhere, and this skill is invoked directly
(`/feasibility-study <topic>`) as often as it is invoked from another skill — so it resolves them
itself rather than assuming a caller supplied them:
```bash
# The node entrypoint. The shell wrapper's own header tells skills to prefer this one once they hold
…Read the whole file at its exact version.
How to install
mdr add sd0xdev/sd0x-harness/feasibility-study@sha256:5b58267bae6bf454The line at the top of this page pins the label git:20260905.7f65168, 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_d56nz5l4ytcxdxyl)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Mar 9, 2026 and Sep 5, 2026, about one every 45 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260905.7f65168 latest | 2026-09-05 | 7f65168 | 7,573 B | A | view · diff |
| git:20260811.d9a8bca | 2026-08-11 | d9a8bca | 7,598 B | A | view · diff |
| git:20260403.ba4191b | 2026-04-03 | ba4191b | 4,393 B | A | view · diff |
| git:20260321.4a2afd0 | 2026-03-21 | 4a2afd0 | 4,176 B | A | view · diff |
| git:20260309.0aecf29 | 2026-03-09 | 0aecf29 | 3,829 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 (7573 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
sd0xdev/sd0x-harness · 194 stars · license MIT · pushed 2026-10-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_d56nz5l4ytcxdxyl GET https://markdownregistry.com/api/v1/resolve?ref=sd0xdev/sd0x-harness/feasibility-study GET https://markdownregistry.com/api/v1/blob/5b58267bae6bf45401d0bc03859f94b049044fff1e36c64b0e7ce4e976fbbf29
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.