Replace single combined summary field with separate issueSummary and prSummary fields

[Copilot]

Issue and PR summaries were generated from a single AI-produced string split by paragraph count — giving the AI no structural incentive to keep content separate, and routinely producing duplicate information in both sections.

Changes

• types.Review — Replace Summary string with IssueSummary and PRSummary fields; validation requires both to be non-empty
• AI prompt (engine.go) — Schema now requests two distinct fields with explicit content constraints:
  • issueSummary: derived only from linked issues; must not reference the diff
  • prSummary: derived only from the PR diff/changed files; must not reference issues
• render.go — renderMarkdown reads the fields directly; removes splitIssueAndPRSummaries and splitParagraphs
• whatIfReview — Updated to populate both new fields
• Tests — All test fixtures and JSON assertions updated to use issueSummary/prSummary

{
  "issueSummary": "...",
  "prSummary": "...",
  "risk": { ... },
  "findings": [ ... ],
  "checklist": [ ... ]
}

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/repos/acme/repo/pulls/42
  • Triggering command: /usr/bin/gh gh api repos/acme/repo/pulls/42 --jq .base.ref,.base.sha (http block)
  • Triggering command: /usr/bin/gh gh api repos/acme/repo/pulls/42 --jq .base.ref,.base.sha 0.1-go1.25.0.lin--gdwarf-5 --global ux-amd64/pkg/tool/linux_amd64/cgo pull.rebase (http block)
  • Triggering command: /usr/bin/gh gh api repos/acme/repo/pulls/42 --jq .base.ref,.base.sha _.a pto/tls/alert.go ux-amd64/pkg/tool/linux_amd64/compile pull.rebase (http block)
• https://api.github.com/repos/acme/repo/pulls/73
  • Triggering command: /usr/bin/gh gh api repos/acme/repo/pulls/73 --jq .base.ref,.base.sha (http block)
  • Triggering command: /usr/bin/gh gh api repos/acme/repo/pulls/73 --jq .base.ref,.base.sha _.a dor/golang.org/x/net/http/httpguts/guts.go ux-amd64/pkg/tool/linux_amd64/compile pull.rebase (http block)
  • Triggering command: /usr/bin/gh gh api repos/acme/repo/pulls/73 --jq .base.ref,.base.sha ux-amd64/src/net --local /usr/local/bin/bash pull.rebase 5519 (http block)
• https://api.github.com/repos/acme/repo/pulls/77
  • Triggering command: /usr/bin/gh gh api repos/acme/repo/pulls/77 --jq .base.ref,.base.sha (http block)
  • Triggering command: /usr/bin/gh gh api repos/acme/repo/pulls/77 --jq .base.ref,.base.sha /addrselect.go /cgo_unix.go ux-amd64/pkg/tool/linux_amd64/compile pull.rebase (http block)
  • Triggering command: /usr/bin/gh gh api repos/acme/repo/pulls/77 --jq .base.ref,.base.sha ux-amd64/src/net-s DWaQSdYHv u/13/cc1 pull.rebase (http block)
• https://api.github.com/repos/checkouttestuser/checkouttestrepo/pulls/987654321
  • Triggering command: /usr/bin/gh gh api repos/checkouttestuser/checkouttestrepo/pulls/987654321 --jq .base.ref,.base.sha (http block)
  • Triggering command: /usr/bin/gh gh api repos/checkouttestuser/checkouttestrepo/pulls/987654321 --jq .base.ref,.base.sha 0.1-go1.25.0.lin--gdwarf-5 0.1-go1.25.0.lin--64 rg/toolchain@v0.-o pull.rebase (http block)
  • Triggering command: /usr/bin/gh gh api repos/checkouttestuser/checkouttestrepo/pulls/987654321 --jq .base.ref,.base.sha ux-amd64/src/net-p --local ux-amd64/pkg/tool/linux_amd64/compile user.email (http block)
• https://api.github.com/repos/checkouttestuser2/checkouttestrepo2/pulls/123456789
  • Triggering command: /usr/bin/gh gh api repos/checkouttestuser2/checkouttestrepo2/pulls/123456789 --jq .base.ref,.base.sha (http block)
  • Triggering command: /usr/bin/gh gh api repos/checkouttestuser2/checkouttestrepo2/pulls/123456789 --jq .base.ref,.base.sha 0.1-go1.25.0.lin-pthread 0.1-go1.25.0.lin-Wl,--no-gc-sections rg/toolchain@v0.-fmessage-length=0 pull.rebase (http block)
  • Triggering command: /usr/bin/gh gh api repos/checkouttestuser2/checkouttestrepo2/pulls/123456789 --jq .base.ref,.base.sha ux-amd64/src/net-p --local ux-amd64/pkg/tool/linux_amd64/link user.email (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Issue summary and PR summary often contain the exact same information</issue_title>
<issue_description># Problem statement
Issue summary and PR summary often contain the exact same information

Requirements

1. The issue summary MUST be derived ONLY from information contained in the issues. It MUST NOT contain information from the PR.
2. The PR summary MUST be derived ONYL from information contained in the PR - it MUST be a summary of what changes have been made. It MUST NOT contain information from the issues.

</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Issue summary and PR summary often contain the exact same information #24

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