fix: pipe the whole generate-spec prompt through stdin in the cursor provider

[sobanieca-redocly]

What/Why/How?

Fixes after testing generate-spec with Cursor and OpenAI providers

Reference

Testing

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• This PR follows the contributing guide
• All new/updated code is covered by tests
• Core code changed? - Tested with other Redocly products (internal contributions only)
• New package installed? - Tested in different environments (browser/node)
• Documentation update has been considered

Security

• The security impact of the change has been considered
• Code follows company security practices and guidelines

---

Note

Low Risk
Scoped to the Cursor provider path in generate-spec with matching test updates; no auth, data, or broad CLI behavior changes.

Overview
Fixes generate-spec when using the Cursor AI provider so the model receives both system instructions and the user refinement text, not just the system portion.

The Cursor CLI drops piped stdin when a prompt is passed on the command line, so runCursor no longer appends request.system to the cursor-agent args. It now sends system + user on stdin (same pattern as Codex), with args limited to -p, --output-format, --trust, and optional --model.

Provider tests were tightened so the spawn stub records stdin via pipedInput, and the Cursor case asserts the combined prompt and updated argv.

^{Reviewed by Cursor Bugbot for commit 2494bee. Bugbot is set up for automated code reviews on this repo. Configure here.}

[changeset-bot]

🦋 Changeset detected

Latest commit: 2494bee

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

Name	Type
@redocly/cli	Patch
@redocly/openapi-core	Patch
@redocly/respect-core	Patch

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Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	71.97% (🎯 69%)	8676 / 12055
🔵	Statements	71.65% (🎯 69%)	9027 / 12598
🔵	Functions	76.63% (🎯 73%)	1719 / 2243
🔵	Branches	63.48% (🎯 61%)	5844 / 9205

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
packages/cli/src/commands/generate-spec/ai/providers.ts	64.86%	43.33%	69.23%	64.86%	49-50, 57, 60-67, 72-77, 112, 118, 121, 147, 150, 162, 174-185, 191, 194, 211

Generated in workflow #10823 for commit 2494bee by the Vitest Coverage Report Action

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Performance Benchmark (Lower is Faster)

CLI Version	Bundle	Lint	Check Config
cli-latest	▓ 1.00x (Fastest)	▓ 1.00x ± 0.01	▓ 1.00x ± 0.02
cli-next	▓ 1.00x ± 0.02	▓ 1.00x (Fastest)	▓ 1.00x (Fastest)