Use multi-run median for lighthouse performance score

[tehw0lf]

Summary

• Adds a num_runs input (default 3) to the reusable lighthouse-scan.yml workflow, passed through as numberOfRuns to the treosh lighthouse-ci-action.
• Lighthouse now reports the median performance score across multiple runs instead of a single sample, reducing false-positive CI failures caused by GitHub-hosted runner CPU jitter.
• No consumer repos require changes — the new input is optional and defaults to 3 runs.

Test plan

• actionlint .github/workflows/lighthouse-scan.yml passes
• Trigger the weekly lighthouse scan in a consumer repo (e.g. tehw0lf/tehw0lf) and confirm the median score is more stable across runs

https://claude.ai/code/session_01YXxxzAa9Mk67SjBqHwrmqm

Summary by CodeRabbit

• Chores
  • Added a configurable number of Lighthouse audit runs, defaulting to three.
  • Lighthouse results now use the median across runs to provide more consistent performance measurements.

[coderabbitai]

📝 Walkthrough

Walkthrough

The reusable Lighthouse workflow adds an optional num_runs input with a default of 3 and passes it to Lighthouse CI as numberOfRuns.

Changes

Lighthouse audit configuration

Layer / File(s)	Summary
Configure Lighthouse run count .github/workflows/lighthouse-scan.yml	Adds the num_runs workflow input and passes it to the Lighthouse CI action as numberOfRuns.

Estimated code review effort: 1 (Trivial) | ~3 minutes

Possibly related PRs

• tehw0lf/workflows#89: Updates the same reusable Lighthouse workflow with configurable run-count behavior.

Suggested reviewers: dependabot[bot]

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly reflects the main change: using multiple Lighthouse runs with median scoring to reduce flakiness.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feature/lighthouse-multi-run-median

---

_{Comment @coderabbitai help to get the list of available commands.}

[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In @.github/workflows/lighthouse-scan.yml:
- Line 116: Update the treosh/lighthouse-ci-action configuration to use the runs
input instead of numberOfRuns, while preserving the existing inputs.num_runs
value so the workflow’s requested run count is applied.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 5262fd2a-3547-44ad-823b-825501f500fb

📥 Commits

Reviewing files that changed from the base of the PR and between d74d445 and d45004a.

📒 Files selected for processing (1)

• .github/workflows/lighthouse-scan.yml

[coderabbitai]

🎯 Functional Correctness | 🟠 Major | ⚡ Quick win

🧩 Analysis chain

🏁 Script executed:

#!/bin/bash
set -euo pipefail

ref="3e7e23fb74242897f95c0ba9cabad3d0227b9b18"
curl -fsSL "https://github.com/treosh/lighthouse-ci-action/${ref}/action.yml" |
  grep -E '(^| )runs:|numberOfRuns'

Repository: tehw0lf/workflows

Length of output: 169

---

Use runs here.
numberOfRuns isn’t an input accepted by treosh/lighthouse-ci-action, so the workflow input is ignored and the run count won’t change.

Proposed fix

-          numberOfRuns: ${{ inputs.num_runs }}
+          runs: ${{ inputs.num_runs }}

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change

	numberOfRuns: ${{ inputs.num_runs }}
	runs: ${{ inputs.num_runs }}

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In @.github/workflows/lighthouse-scan.yml at line 116, Update the
treosh/lighthouse-ci-action configuration to use the runs input instead of
numberOfRuns, while preserving the existing inputs.num_runs value so the
workflow’s requested run count is applied.