Pull Request Description Generator

Write a pull request description from a diff or commits: title, summary, list of changes and testing steps.

Pay by wallet (x402) AI-generated pr-description-generate

Example

Example answer

{
  "title": "Test Document Title",
  "changes": [
    "Changed const x from 1 to 2",
    "Updated return statement to use new constant value"
  ],
  "summary": "Updates the constant value of x from 1 to 2. This change affects the return value of the function.",
  "testing": [
    "Verify that the function returns 2 instead of 1",
    "Run existing unit tests to ensure no regressions"
  ],
  "markdown": "## Description\nUpdates the constant value of x from 1 to 2. This change affects the return value of the function.\n\n## Changes\n- Changed const x from 1 to 2\n- Updated return statement to use new constant value\n\n## Testing\n- Verify that the function returns 2 instead of 1\n- Run existing unit tests to ensure no regressions\n",
  "related_issues": [],
  "breaking_changes": []
}

Inputs

Field	Type	Required	What it is
`diff`	string	Yes	—
`title`	string	No	—

Output fields

How reliably each field appears in a successful answer.

Field	Type	Appears
`title`	string	Always (present in every successful answer)
`changes`	array	Always (present in every successful answer)
`summary`	string	Always (present in every successful answer)
`testing`	array	Always (present in every successful answer)
`markdown`	string	Always (present in every successful answer)

How to call it

The same tool through each route. MCP clients reach it through Strale’s server at https://api.strale.io/mcp; the call below is what the agent sends.

# Needs an API key. max_price_cents caps what this call may cost.
curl -X POST https://api.strale.io/v1/do \
  -H "Authorization: Bearer $STRALE_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{
    "capability_slug": "pr-description-generate",
    "inputs": {
      "diff": "- const x = 1;\n+ const x = 2;\n  return x;",
      "title": "Test Document Title"
    },
    "max_price_cents": 5
  }'

{
  "tool": "strale_execute",
  "arguments": {
    "slug": "pr-description-generate",
    "inputs": {
      "diff": "- const x = 1;\n+ const x = 2;\n  return x;",
      "title": "Test Document Title"
    },
    "max_price_cents": 5
  }
}

import { Strale } from "straleio";

const strale = new Strale({ apiKey: process.env.STRALE_API_KEY! });
const result = await strale.do({
  capability_slug: "pr-description-generate",
  inputs: {
    "diff": "- const x = 1;\n+ const x = 2;\n  return x;",
    "title": "Test Document Title"
  },
  max_price_cents: 5,
});

import os
from straleio import Strale, DoRequest

strale = Strale(api_key=os.environ["STRALE_API_KEY"])
result = strale.do(DoRequest(
    capability_slug="pr-description-generate",
    inputs={
        "diff": "- const x = 1;\n+ const x = 2;\n  return x;",
        "title": "Test Document Title",
    },
    max_price_cents=5,
))

# No account. The first request answers 402 with the price in USDC;
# an x402 client pays it from your wallet and repeats the request.
curl -i 'https://api.strale.io/x402/v2/pr-description-generate?diff=-+const+x+%3D+1%3B%0A%2B+const+x+%3D+2%3B%0A++return+x%3B&title=Test+Document+Title'

Limitations

Motivation and related issues can be missed
AI-generated from diff content — may not capture the business motivation or link to relevant issues automatically
What to do instead: Include the ticket/issue number in the input and review the generated description for completeness