crucible-research-foundations SKILL.md skillA
crucible-research-foundations from terrylica/cc-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add terrylica/cc-skills/crucible-research-foundations@git:20261022.e256ee4Pins git:20261022.e256ee4 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- terrylica/cc-skills
- Path
plugins/crucible/skills/a-research-foundations/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261022.e256ee4, committed Oct 22, 2026
- First version recorded
- Apr 19, 2026
- Size
- 9,689 bytes
- Repository stars
- 2
- License
- MIT
Validate findings, design shuffled nulls, check label leakage, review causal features. TRIGGERS - shuffled null, label leakage.
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
# 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@sha256:4edb3d790832dfc2The line at the top of this page pins the label git:20261022.e256ee4, 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_6pxjmgg7cqaevkyk)
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Versions
The registry has recorded 5 versions of this file, between Apr 19, 2026 and Oct 22, 2026, about one every 46 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261022.e256ee4 latest | 2026-10-22 | e256ee4 | 9,689 B | A | view · diff |
| git:20261022.cf2a6a9 | 2026-10-22 | cf2a6a9 | 9,651 B | A | view · diff |
| git:20260722.b1b53be | 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 (9689 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 · 2 stars · license MIT · pushed 2026-11-08 · 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/4edb3d790832dfc23116643423cdefdfc3332cab743a2d5bc67f3a8688cd93c4
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.