e-volv

Performance playbook

BundleSizeGuard

Builds the PR branch and base branch, compares bundle sizes, and attributes growth to specific imports or missing dynamic imports.

On pull requests that touch frontend source, build the PR branch and the base branch, compare total and per-route bundle sizes, and post a delta table as a deduplicated PR comment. Growth beyond the configured threshold is attributed to imports, new dependencies, duplicate libraries, or lost dynamic imports; exceeding a hard limit fails the check.

Identifier
bundle-size-guard
Version
1.0.0
Steps
4
Triggers
2
  • bundle
  • performance
  • frontend
  • webpack
  • nextjs

When it runs

Pull requestpull_request.opened
Settle delay
15s after the event

Only when all hold

  • pullRequest.isDraft not equals true
  • actor.username not in dependabot, dependabot[bot], renovate, renovate[bot], github-actions, github-actions[bot]
  • actor.username not contains [bot]
Pull requestpull_request.synchronize
Settle delay
15s after the event

Only when all hold

  • pullRequest.isDraft not equals true
  • actor.username not in dependabot, dependabot[bot], renovate, renovate[bot], github-actions, github-actions[bot]
  • actor.username not contains [bot]

The pipeline

The graph below is the one the workflow opens with in the builder — same steps, same layout, drawn on the same canvas. The run playing through it is a simulation; the branches and conditions are real.

React Flow
  1. 01
    PR Opened / Synchronizedtrigger

    The event that starts the run.

  2. 02
    Clone Repositorygit.clone

    Shallow-clones the repository at the right ref.

  3. 03
    Measure Bundle Deltaagent.run

    One agent works the task with its toolkit.

  4. 04
    Publish Bundle Reportreport.publish

    Posts or updates a deduplicated report comment.

The agent

Bundle Size Guard

Base type
Senior Developer
Temperature
0.2
Max iterations
40
Tools
5

Filesystem · 2

  • read_fileRead File · read
  • list_dirList Directory · read

Terminal · 1

  • run_terminal_cmdRun Terminal Command · write

Code search · 1

  • code_searchCode Search · read

Status · 1

  • update_statusUpdate Status · write