tdd-author SKILL.md skillA
tdd-author from cahenesy/throughline is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add cahenesy/throughline/tdd-author@git:20261015.9250c5bPins git:20261015.9250c5b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- cahenesy/throughline
- Path
skills/tdd-author/SKILL.md- Versions recorded
- 8
- Latest version
- git:20261015.9250c5b, committed Oct 15, 2026
- First version recorded
- Aug 14, 2026
- Size
- 46,401 bytes
- Repository stars
- 3
- License
- MIT
Reconcile the current PRD against the previous PRD version and the existing TDDs, decide how many Technical Design Docs the change needs and their scope, then author them. Run once per PRD update, in its own session. Invoke with /tdd-author.
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
# TDD authoring Run once after a PRD update. YOU decide how many TDDs to write, and their scope, based on what changed. Persist each to `docs/tdd/NNNN-<slug>.md`. ## Relationship to superpowers (read first) This skill IS the technical-design step for throughline — the governance-producing equivalent of `superpowers:writing-plans`. When the user invokes `/tdd-author`, do NOT also invoke `superpowers:brainstorming` or `writing-plans`; this skill owns the phase and its output is the TDD/ADR design-of-record (see [[ADR 0001]] in `docs/adr/`). If a `docs/superpowers/plans/*` (or `specs/*`) file or other prior design notes exist, READ and fold in their substance rather than redoing the work; they are transient input, never authoritative, never relocated. The canonical record is `docs/tdd/` + `docs/adr/`. A throughline TDD is a DESIGN, not a step-by-step build script — the bite-sized failing-test-first task breakdown is `/build-tdds`'s job, so do not reproduce it here. ## 0. Resume check Resolve the plugin tree from the first set of `CLAUDE_PLUGIN_ROOT` / `GROK_PLUGIN_ROOT` (env names; fail closed via `tl_plugin_root`), then source the draft helper: …
Read the whole file at its exact version.
How to install
mdr add cahenesy/throughline/tdd-author@sha256:c31b46178e8b6109The line at the top of this page pins the label git:20261015.9250c5b, 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_duv5pq6kv5snqttu)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 8 versions of this file, between Aug 14, 2026 and Oct 15, 2026, about one every 9 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261015.9250c5b latest | 2026-10-15 | 9250c5b | 46,401 B | A | view · diff |
| git:20261012.e4434fc | 2026-10-12 | e4434fc | 46,286 B | A | view · diff |
| git:20261012.82212ef | 2026-10-12 | 82212ef | 45,481 B | A | view · diff |
| git:20261007.3cd6695 | 2026-10-07 | 3cd6695 | 44,459 B | A | view · diff |
| git:20261005.c7ecdfc | 2026-10-05 | c7ecdfc | 40,428 B | A | view · diff |
| git:20261005.f316a05 | 2026-10-05 | f316a05 | 39,559 B | A | view · diff |
| git:20260815.d29fbed | 2026-08-15 | d29fbed | 39,510 B | A | view · diff |
| git:20260814.6d5ce23 | 2026-08-14 | 6d5ce23 | 39,530 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 (46401 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
cahenesy/throughline · 3 stars · license MIT · pushed 2026-10-15 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_duv5pq6kv5snqttu GET https://markdownregistry.com/api/v1/resolve?ref=cahenesy/throughline/tdd-author GET https://markdownregistry.com/api/v1/blob/c31b46178e8b61090d6f7a3c3d5bd12e55248ad382c67c0b4b2d7b30be8d5e55
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.