did SKILL.md skillA
did from ericluo04/claude-academic-workflow is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ericluo04/claude-academic-workflow/did@git:20261009.20e3598Pins git:20261009.20e3598 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ericluo04/claude-academic-workflow
- Path
skills/did/SKILL.md- Versions recorded
- 10
- Latest version
- git:20261009.20e3598, committed Oct 9, 2026
- First version recorded
- Aug 5, 2026
- Size
- 40,905 bytes
- Repository stars
- 25
- License
- a license file GitHub does not identify
Design, estimate, validate, and write up a difference-in-differences analysis, using the post-2018 heterogeneity-robust toolkit with an explicit statement of which parallel-trends assumption is imposed. TRIGGER on "difference-in-differences", "DiD", "TWFE", "event study", "staggered adoption", "staggered rollout", "parallel trends", "pre-trends", "Callaway-Sant'Anna", "Sun-Abraham", "imputation estimator", "Goodman-Bacon", "stacked DiD", "not-yet-treated", "repeated cross-section…
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
# Difference-in-differences An opinionated DiD workflow grounded in a read canon (references/canon.md). Deliverable: the recommendation with its citation, the R estimation and diagnostics code, and a methods paragraph. The skill stops at the four stop points in ../causal-design/references/shared-rules.md (section "Stop points") and puts each choice to the user. Where the literature is unsettled the skill names a default and the condition that moves you off it, and where the canon genuinely disagrees it says so instead of faking consensus. Current as of 2026-10-09; refresh per shared-rules (../causal-design/references/shared-rules.md, section "Refresh path"). Nothing enters the canon without the user's approval. ## Exemplar designs Seven shapes worth recognizing on sight. Find the one your data looks like before writing a specification; what each one teaches is in references/canon.md, section "Exemplar rows". | Design shape | Canonical case | Marketing analogue | What kills it | |---|---|---|---| …
Read the whole file at its exact version.
How to install
mdr add ericluo04/claude-academic-workflow/did@sha256:bd15bf3d655b5007The line at the top of this page pins the label git:20261009.20e3598, 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_daiothzdmm3aa3qs)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 10 versions of this file, between Aug 5, 2026 and Oct 9, 2026, about one every 7 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261009.20e3598 latest | 2026-10-09 | 20e3598 | 40,905 B | A | view · diff |
| git:20261009.0fd7961 | 2026-10-09 | 0fd7961 | 41,306 B | A | view · diff |
| git:20261009.b655a26 | 2026-10-09 | b655a26 | 56,925 B | A | view · diff |
| git:20261009.ea3018e | 2026-10-09 | ea3018e | 49,238 B | A | view · diff |
| git:20261009.ebdc946 | 2026-10-09 | ebdc946 | 46,807 B | A | view · diff |
| git:20260828.039723a | 2026-08-28 | 039723a | 46,762 B | A | view · diff |
| git:20260826.ef24590 | 2026-08-26 | ef24590 | 47,635 B | A | view · diff |
| git:20260826.f58b16a | 2026-08-26 | f58b16a | 31,027 B | A | view · diff |
| git:20260805.24429e2 | 2026-08-05 | 24429e2 | 21,366 B | A | view · diff |
| git:20260805.0f0e26e | 2026-08-05 | 0f0e26e | 21,367 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 (40905 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
ericluo04/claude-academic-workflow · 25 stars · license a license file GitHub does not identify · pushed 2026-10-29 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_daiothzdmm3aa3qs GET https://markdownregistry.com/api/v1/resolve?ref=ericluo04/claude-academic-workflow/did GET https://markdownregistry.com/api/v1/blob/bd15bf3d655b500718f561081cf948f0bb18e0b0644ef205af651861a033e347
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.