Change default branch from 'master' to 'main'

[abechan1]

Closes #116

Summary by CodeRabbit

• Chores
  • Automated workflow runs on pushes to main instead of master. Pull-request triggers remain unchanged. This does not introduce any user-facing feature changes.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-14T23:22:19.793643Z	02d3f4d	PR opened

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

• Configuration used: Organization UI
• Review profile: CHILL
• Plan: Advanced
• Run ID: 0df42529-7624-41ba-bbd4-c951abe6f5a7

📥 Commits

Reviewing files that changed from the base of the PR and between c867389 and 02d3f4d.

📒 Files selected for processing: 1

• .github/workflows/main.yml

Included review availability: This review used your included allowance. Your plan provides up to 1 included review per hour; 0 remain after this review.

📝 Walkthrough

The workflow now runs on pushes to main instead of master. Pull-request triggers remain unchanged.

Changes: Workflow Push Trigger

Layer / File(s)	Summary
Update push branch filter .github/workflows/main.yml	The push branch filter changes from master to main. Pull-request triggers are unchanged.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~2 minutes

Change: Other

Merge Risk: ⚪ Minimal · up to 02d3f

Pushes to main trigger the workflow, matching the PR target, while pull-request triggering is unchanged. No concrete merge risk remains.

### Architecture Summary

Architecture risk: 🔵 Low · up to 02d3f

The changed surface does not map to a changed system, dependency edge, entrypoint, or external dependency.

Changed systems: None identified.

Architecture concerns
No architecture-level concerns identified.

Review details

Before / after behavior

• observed — Modified behavior in .github/workflows/main.yml: The push branch filter changes from master to main.

Pre-merge checks: 5

Passed checks: 5 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage		No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.
Title check		The title clearly describes the main change: updating the workflow branch from "master" to "main".

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Commit to this branch
• Create a new PR

• Autofix · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

_{A rabbit checks the branch at dawn,
The push now hops to main along.
Pull requests keep their old route,
One small edit sets the sprout.
The rabbit nibbles, pleased and bright.}

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

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 02d3f4d21c

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Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[chatgpt-codex-connector]

Add a regression test for the main-branch trigger

This workflow behavior changes without the test-suite update required for every repository change. Add a spec that parses .github/workflows/main.yml and asserts that pushes to main trigger the workflow, so a future branch-name regression cannot silently disable push CI.

AGENTS.md reference: AGENTS.md:L4-L4

Useful? React with 👍 / 👎.