gtfs-diff SKILL.md skillA
gtfs-diff from stbenjam/skillsaw is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add stbenjam/skillsaw/gtfs-diff@git:20260904.1b802e3Pins git:20260904.1b802e3 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- stbenjam/skillsaw
- Path
tests/fixtures/antigravity/workspace-clean/.agents/skills/gtfs-diff/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260904.1b802e3, committed Sep 4, 2026
- Size
- 764 bytes
- Repository stars
- 69
- License
- Apache-2.0
Use when comparing a generated GTFS feed against the last published one, before releasing a timetable change.
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
# GTFS diff Compare the feed a branch generates against the published feed so a timetable change is reviewed against what riders will actually see. ## Steps 1. Run `make gtfs-export FEED=published` to write `build/gtfs-published/`. 2. Run `make gtfs-export` on the current checkout. 3. Diff the two directories with `git diff --no-index build/gtfs-published build/gtfs`. 4. Read the diff against the change under `internal/schedule/`. Every changed row must trace to a line in that change. Report every changed row the change does not explain, and every route whose first or last sailing of the day moved.
Read the whole file at its exact version.
How to install
mdr add stbenjam/skillsaw/gtfs-diff@sha256:a301ee8b8f59a390The line at the top of this page pins the label git:20260904.1b802e3, 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_syxe2v5jaagefbq5)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Sep 4, 2026.
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 (764 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
stbenjam/skillsaw · 69 stars · license Apache-2.0 · pushed 2026-11-01 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_syxe2v5jaagefbq5 GET https://markdownregistry.com/api/v1/resolve?ref=stbenjam/skillsaw/gtfs-diff GET https://markdownregistry.com/api/v1/blob/a301ee8b8f59a390a4b082ab376fb626b906efee9530bc4bf836f06b6e661138
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.