fable-understand SKILL.md skillA
fable-understand from rhein1/fable5-codex is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add rhein1/fable5-codex/fable-understand@git:20261020.a2aa9efPins git:20261020.a2aa9ef in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- rhein1/fable5-codex
- Path
plugins/fable5-codex/skills/fable-understand/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261020.a2aa9ef, committed Oct 20, 2026
- First version recorded
- Jul 6, 2026
- Size
- 2,745 bytes
- Repository stars
- 4
- License
- MIT
Source-grounded codebase understanding for behavior, architecture, boot flow, data flow, integration wiring, or "how does this work" questions. Use when the user asks Codex to explain a system, trace a path, map a subsystem, or answer behavior questions with citations and unknowns.
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
# Fable Understand Answer from implementation evidence, not memory or stale docs. For ECF-style governed runs, use `../../references/ecf-run-contract.md`. For large or high-risk understanding tasks, use real Codex subagents when the runtime exposes a subagent tool and the user has not opted out; treat cross-module architecture, boot flow, data flow, integration wiring, security/privacy/money/data/API, or many-file mapping questions as large by default. Otherwise run `single-agent multi-lens` and say why no subagents were used when workflow trace is requested. Use the centralized capability-aware profiles in `../../references/model-support.md` and `../../config/model-profiles.json`. Keep model and reasoning selections configurable, preserve explicit overrides, and record the requested and actual coordinator model and effort and requested and actual worker model plus any fallback. Request parallel delegation only for useful disjoint lenses; report `single-agent multi-lens` when no workers ran. The coordinator owns synthesis and final verification. Never claim a model, effort or subagent ran without runtime evidence. ## Workflow 1. Restate the question and scope. …
Read the whole file at its exact version.
How to install
mdr add rhein1/fable5-codex/fable-understand@sha256:01eb345e5cfb0278The line at the top of this page pins the label git:20261020.a2aa9ef, 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_3xwlblazahg4i7uh)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jul 6, 2026 and Oct 20, 2026, about one every 27 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261020.a2aa9ef latest | 2026-10-20 | a2aa9ef | 2,745 B | A | view · diff |
| git:20260921.41cb25e | 2026-09-21 | 41cb25e | 3,030 B | A | view · diff |
| git:20260714.7c51b62 | 2026-07-14 | 7c51b62 | 2,537 B | A | view · diff |
| git:20260706.3b76c67 | 2026-07-06 | 3b76c67 | 2,178 B | A | view · diff |
| git:20260706.ee682d6 | 2026-07-06 | ee682d6 | 2,085 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 (2745 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
rhein1/fable5-codex · 4 stars · license MIT · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_3xwlblazahg4i7uh GET https://markdownregistry.com/api/v1/resolve?ref=rhein1/fable5-codex/fable-understand GET https://markdownregistry.com/api/v1/blob/01eb345e5cfb027810a3985f0f526ab78d23bff8fd6d0fe329110d71269c6d6e
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.