evals-bootstrap SKILL.md skillA
evals-bootstrap from undefined-ui/second-brain-os is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add undefined-ui/second-brain-os/evals-bootstrap@git:20261007.c7fa35bPins git:20261007.c7fa35b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- undefined-ui/second-brain-os
- Path
plugins/agents-course/skills/evals-bootstrap/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261007.c7fa35b, committed Oct 7, 2026
- First version recorded
- Sep 29, 2026
- Size
- 3,148 bytes
- Repository stars
- 1,109
- License
- MIT
Scaffold a first eval suite for an agent: mine real failures into cases, write behavioural checks over traces, and generate the runner. Use when the user wants evals, regression tests for an agent, a golden set, or asks how to know a prompt/model change did not break things. Do NOT use for a single task's done-check (goal-test) or for auditing context (context-audit).
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
# Bootstrap the eval suite Theory: [Two kinds of checks](https://secondbrainos.dev/#/read/course-5-evals/two-kinds-of-checks) and the full walkthrough in [Evals practice](https://secondbrainos.dev/#/read/course-5-evals/evals-practice). An eval suite is the same test after every change. Behavioural checks read the steps of a trace; end-to-end checks read only the result. Start behavioural: they are deterministic, run in seconds, and diagnose instead of just scoring. ## Workflow 1. **Find real failures.** Ask where the agent's runs live (logs, transcripts, a traces directory). Read until you have up to twenty real failures — not imagined ones. If there are no logged runs yet, build the trace logging first (step 3) and seed the suite with the three failures the user can recall; a small honest suite beats a large invented one. 2. **One line per failure.** For each: the input, and the one specific behaviour that should have happened and did not. Failures cluster into four to eight behaviours; name them. 3. **Ensure traces exist.** Each run must be stored as `traces/<id>.json` — a list of events including tool calls. If the user's harness is Claude …
Read the whole file at its exact version.
How to install
mdr add undefined-ui/second-brain-os/evals-bootstrap@sha256:ad38170880dea396The line at the top of this page pins the label git:20261007.c7fa35b, 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_kn5lmk3ky4hrher3)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Sep 29, 2026 and Oct 7, 2026, about one every 9 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261007.c7fa35b latest | 2026-10-07 | c7fa35b | 3,148 B | A | view · diff |
| git:20260929.fd3a523 | 2026-09-29 | fd3a523 | 3,178 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 (3148 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
undefined-ui/second-brain-os · 1,109 stars · license MIT · pushed 2026-10-14 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_kn5lmk3ky4hrher3 GET https://markdownregistry.com/api/v1/resolve?ref=undefined-ui/second-brain-os/evals-bootstrap GET https://markdownregistry.com/api/v1/blob/ad38170880dea396c4be4bf09881da83ac5f96c968c1e039e25b11def5fffbe0
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.