buf-cli-lint-breaking-build SKILL.md skillA

buf-cli-lint-breaking-build from testland/qa is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add testland/qa/buf-cli-lint-breaking-build@git:20260813.0ecb572

Pins git:20260813.0ecb572 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
testland/qa
Path
plugins/qa-grpc/skills/buf-cli-lint-breaking-build/SKILL.md
Versions recorded
5
Latest version
git:20260813.0ecb572, committed Aug 13, 2026
First version recorded
Jul 20, 2026
Size
7,730 bytes
Repository stars
11
License
MIT

Wraps the buf CLI for protobuf PR gating: `buf build` (compile .proto), `buf lint` (STANDARD rules: snake_case fields, Service suffix), `buf breaking --against {ref}` (detect wire/codegen breakage vs a git/BSR baseline), and `buf format`. Use as the CI proto-lint + breaking-change gate, or to debug a breaking failure by rule ID (e.g. FIELD_NO_DELETE_UNLESS_NUMBER_RESERVED) and pick the FILE/PACKAGE/WIRE_JSON/WIRE ruleset per consumer. This is the detection TOOL that enforces the rules and…

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

# buf-cli-lint-breaking-build

## Overview

Wraps three buf CLI commands - `build`, `lint`, `breaking` - as the
proto-PR gate, per
[buf.build/docs/cli/quickstart/](https://buf.build/docs/cli/quickstart/).
The catalog of what counts as breaking and why lives in
[references/versioning-strategy.md](references/versioning-strategy.md)
(+ [references/buf-breaking-rules.md](references/buf-breaking-rules.md)).

## When to use

- Adding buf as the proto lint + breaking-change gate on a new
  repo.
- A PR changes `.proto` files - need to gate the merge.
- Investigating a `buf breaking` failure - what rule fired?
- Configuring buf for a monorepo with multiple proto modules.

## Authoring

### Install

Per buf docs, install via Homebrew, Go install, or release binary.
Version 1.32.0 or higher is required. Verify:

```bash
buf --version
# 1.32.0 or higher
```

### Configure `buf.yaml`

The v2 format per
[buf.build/docs/cli/quickstart/](https://buf.build/docs/cli/quickstart/):

```yaml
version: v2
modules:
  - path: proto
lint:
  use:
    - STANDARD
breaking:
  use:
    - FILE          # default; choose per references/versioning-strategy.md
```
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add testland/qa/buf-cli-lint-breaking-build@sha256:02e8ec178fac4130

The line at the top of this page pins the label git:20260813.0ecb572, 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.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_lrtmyc75w2lox7xf.svg)](https://markdownregistry.com/a/art_lrtmyc75w2lox7xf)

1 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 5 versions of this file, between Jul 20, 2026 and Aug 13, 2026, about one every 6 days.

versioncommittedcommitsizeaudit
git:20260813.0ecb572 latest2026-08-13 0ecb572 7,730 BA view · diff
git:20260728.1bce4242026-07-28 1bce424 7,326 BA view · diff
git:20260726.e26b0d92026-07-26 e26b0d9 8,441 BA view · diff
git:20260724.d4db7562026-07-24 d4db756 8,412 BA view · diff
git:20260720.32b13bd2026-07-20 32b13bd 8,808 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (7730 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

GitHub

testland/qa · 11 stars · license MIT · pushed 2026-10-20 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_lrtmyc75w2lox7xf
GET https://markdownregistry.com/api/v1/resolve?ref=testland/qa/buf-cli-lint-breaking-build
GET https://markdownregistry.com/api/v1/blob/02e8ec178fac413049ad8515b211db490bbb0111b6df0ae61702c8a9f12b605b

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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.

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