crucible-research-foundations skillA
crucible-research-foundations is agent-read markdown (skill) from terrylica/cc-skills: Validate findings, design shuffled nulls, check label leakage, review causal features. TRIGGERS - shuffled null, label leakage.
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# Research Foundations — 6 epistemic disciplines
> **Self-Evolving Skill**: This skill improves through use. If a discipline's guidance fails in practice or a new trap emerges, update the relevant section AND append to `references/evolution-log.md`. Don't defer.
Read these in order. The first three (causal, labels, nulls) are the hardest prerequisites — violating any of them silently invalidates every downstream result.
---
## 1. Causal-feature invariant (bars[:i])
Every feature `f[i]` used at trigger/decision bar `i` must be computable using only `bars[0:i]` — never `bars[i]`, never `bars[i+1:]`. Violation produces look-ahead bias; findings silently become worthless.
**Canonical pattern**:
```python
for i in range(n):
lo = max(0, i - window)
wind = values[lo:i] # EXCLUSIVE upper bound — no peeking
f[i] = compute(wind)
```
Note `lo:i` (exclusive), not `lo:i+1`. This discipline "feels off by one" but is correct.
**Verification test** (add to every new feature function):
```python
def test_causality(fn, n=1000):
bars = generate_test_bars(n)
f_orig = fn(bars)
bars_mod = bars.copy()
bars_mod[500:] *= 2 # perturb the FUTURE
…Read the whole file at its exact version.
How to install
mdr add terrylica/cc-skills/crucible-research-foundations@git:20260722.b1b53bemdr add terrylica/cc-skills/crucible-research-foundations@sha256:cfc5b15ffe2bf77cPin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_6pxjmgg7cqaevkyk)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260722.b1b53be latest | 2026-07-22 | b1b53be | 9,346 B | A | view · diff |
| git:20260506.c488415 | 2026-05-06 | c488415 | 9,333 B | A | view · diff |
| git:20260419.feb9aa2 | 2026-04-19 | feb9aa2 | 10,060 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 (9346 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
terrylica/cc-skills · 74 stars · license MIT · pushed 2026-09-24 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_6pxjmgg7cqaevkyk GET https://markdownregistry.com/api/v1/resolve?ref=terrylica/cc-skills/crucible-research-foundations GET https://markdownregistry.com/api/v1/blob/cfc5b15ffe2bf77ce6bab5f13bf8afa43b8fc8b6af3f732d3800950b1aef61b8
Your agent 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.