Pipe library / json-api-diff

json-api-diff

Watch a public JSON document and emit when the selected fields change.

Utilities

api.github.com

CLI

pipes run examples/json-api-diff.pipe.yamlCopy CLI

MCP call

{
  "name": "pipe__json-api-diff",
  "arguments": {}
}Copy MCP call

Pipe file

examples/json-api-diff.pipe.yaml

pipes: 0
name: json-api-diff
version: 0.1.0
description: Watch a public JSON document and emit when the selected fields change.
permissions:
  network: [api.github.com]
inputs:
  type: object
  properties:
    repo:
      type: string
      pattern: "^[A-Za-z0-9_.-]+/[A-Za-z0-9_.-]+$"
      default: tokio-rs/tokio
  required: [repo]
outputs:
  type: object
  properties:
    text: { type: string }
    count: { type: integer }
  required: [text, count]
output:
  text: "${steps.format.text}"
  count: "${steps.format.count}"
steps:
  - id: fetch
    block: fetch_http
    with:
      url: "https://api.github.com/repos/${inputs.repo}"
      headers:
        accept: application/vnd.github+json
      max_bytes: 400000
    retry: { max: 2, backoff_ms: 500 }
    timeout_ms: 15000
  - id: parsed
    block: parse_json
    in: "${steps.fetch}"
  - id: shaped
    block: map
    in: "${steps.parsed}"
    with:
      pick: [full_name, description, stargazers_count, pushed_at]
  - id: changed
    block: diff_since_last
    in: "${steps.shaped}"
    with:
      key: [full_name]
      compare: [description, stargazers_count, pushed_at]
      emit: [added, changed]
      first_run: all
  - id: format
    block: format
    in: "${steps.changed}"
    with:
      header: "Repo:\n"
      item_template: "- ${item.full_name} stars ${item.stargazers_count} pushed ${item.pushed_at}"
      separator: "\n"
  - id: print
    block: emit_stdout
    in: "${steps.format.text}"
    with: { format: text }
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