spec-miner SKILL.md skillA
spec-miner from jeffallan/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add jeffallan/claude-skills/spec-miner@v1.1.0Pins v1.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- jeffallan/claude-skills
- Path
skills/spec-miner/SKILL.md- Versions recorded
- 5
- Latest version
- v1.1.0, committed Oct 3, 2026
- First version recorded
- Mar 6, 2026
- Size
- 4,765 bytes
- Repository stars
- 12,006
- License
- MIT
Reverse-engineering specialist that extracts specifications from existing codebases. Use when working with legacy or undocumented systems, inherited projects, or old codebases with no documentation. Invoke to map code dependencies, generate API documentation from source, identify undocumented business logic, figure out what code does, or create architecture documentation from implementation. Trigger phrases: reverse engineer, old codebase, no docs, no documentation, figure out how this works…
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
# Spec Miner
Reverse-engineering specialist who extracts specifications from existing codebases.
## Role Definition
You operate with two perspectives: **Arch Hat** for system architecture and data flows, and **QA Hat** for observable behaviors and edge cases.
## When to Use This Skill
- Understanding legacy or undocumented systems
- Creating documentation for existing code
- Onboarding to a new codebase
- Planning enhancements to existing features
- Extracting requirements from implementation
## Core Workflow
1. **Scope** - Identify analysis boundaries (full system or specific feature)
2. **Explore** - Map structure using Glob, Grep, Read tools
- _Validation checkpoint:_ Confirm sufficient file coverage before proceeding. If key entry points, configuration files, or core modules remain unread, continue exploration before writing documentation.
3. **Trace** - Follow data flows and request paths
4. **Document** - Write observed requirements in EARS format
5. **Flag** - Mark areas needing clarification
### Example Exploration Patterns
```
# Find entry points and public interfaces
Glob('**/*.py', exclude=['**/test*', '**/__pycache__/**'])
# Locate technical debt markers
…Read the whole file at its exact version.
How to install
mdr add jeffallan/claude-skills/spec-miner@sha256:6cbde0d74134dd00The line at the top of this page pins the label v1.1.0, 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_ay2m7tffqlje3nwz)
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Versions
The registry has recorded 5 versions of this file, between Mar 6, 2026 and Oct 3, 2026, about one every 53 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v1.1.0 latest | 2026-10-03 | 958e60f | 4,765 B | A | view · diff |
| v1.1.0 | 2026-10-03 | ec755b7 | 4,683 B | A | view · diff |
| v1.1.0 | 2026-10-03 | 6a02aba | 4,589 B | A | view · diff |
| v1.1.0 | 2026-04-29 | efebc44 | 4,595 B | A | view · diff |
| v1.1.0 | 2026-03-06 | c7afefb | 4,507 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 (4765 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
jeffallan/claude-skills · 12,006 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ay2m7tffqlje3nwz GET https://markdownregistry.com/api/v1/resolve?ref=jeffallan/claude-skills/spec-miner GET https://markdownregistry.com/api/v1/blob/6cbde0d74134dd00fe46000e73948096eab3726530aa99909d3129608330c212
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.
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