Feature request: batch-fetch merged PR metadata for release notes / changelog generation

Empieza leyendo las herramientas existentes search_pull_requests y list_pull_requests, así como las convenciones de pruebas y documentación del repositorio. Define la entrada acotada pull_numbers, el manejo individual de cada PR para las solicitudes faltantes o no fusionadas y la respuesta de metadatos normalizada. Se considerará terminado cuando las pruebas y la documentación cubran el comportamiento v1 acordado sin añadir agregación de diffs ni inferencia de releases.

Problem

For a release window, teams often have a known list of merged PR numbers. Building a structured changelog today requires opening each PR or scripting against REST/GraphQL outside MCP. Agents would benefit from one MCP call that returns normalized metadata for many PRs.

Proposed solution (v1)

Add a tool that accepts:

• owner, repo
• pull_numbers: array of integers (bounded)

Returns (exact fields up to maintainers), per PR, for example:

• number, title, html_url
• merged_at, merge_commit_sha (when available)
• labels (at least name)
• author login

Output: JSON suitable for templating Markdown release notes in the client (prose stays in the agent or human editor).

Explicit non-goals (v1):

• Full combined diff across PRs (too heavy); linking to each PR is enough.
• Guessing “what shipped in this release” without an explicit PR list—the caller provides the list.

Why this matters

• Release engineering + agents: “Here are the PRs we shipped” → one call → table/sections for notes, Slack, or tickets.
• Composes with search_pull_requests / list_pull_requests: caller selects PRs, tool hydrates details.

Relationship to existing requests

• Create/update releases (#1909) addresses publishing a release after notes exist; this request is read-side batch hydration of PR metadata to produce those notes.

Related issues

• Issue/PR relationship graph (planning context, different shape): https://github.com/github/github-mcp-server/issues/1510
• Companion (batch review threads): https://github.com/github/github-mcp-server/issues/2301

Acceptance criteria (suggestion)

• Bounded input; documented max PR count.
• Clear behavior for non-merged or missing PRs (per-PR errors vs fail-all—documented).
• Tests + docs per repo conventions.

Note

We are happy to prototype a PR if maintainers agree on v1 scope.