// structured maintenance automation

Structured, Repeatable Automation for legacy migration

Close security exposure and clear upgrade debt at a pace your reviewers can stand behind. Every change arrives validated, with the evidence to sign it off.

// from the blog All posts
12 AUG 2026

Evaluating Open Weight Models for Software Maintenance

Can open weight models automate software maintenance effectively and at lower cost?

Read the post
4 AUG 2026

Introducing Parity: Prove what a replacement preserves

Replace legacy software without losing the behavior your team depends on.

Read the post
// how it works

Automate the work.
Keep the control.

It records how things behave before the change, and proves nothing else changed after.

  1. Trigger An advisory, a schedule, a webhook. No prompt.
  2. Observe It records how that part behaves, before any change.
  3. Workflow Your engineers pick one, tweak it, or build their own.
  4. Verify Tests pass. Nothing changed except what was supposed to.
PR opened A PR with its evidence. Your reviewer signs off.
Held, with why Not ready? It stops and says why.

Nothing changes unobserved. Nothing merges without your reviewer.

// solutions

Patch CVEs as soon as they land

With the rise of AI, the amount of security advisories is ramping up. Every advisory pulls engineers into triage, package selection, validation, review, and audit notes. Bosun starts that task when the advisory lands, applies your policy, and produces a reviewable PR or a clear reason to wait.

CVE patching
The Bosun package remediation workflow: inspect the package context, apply one remediation, verify the audit and tests, comment on linked issues, and open a remediation pull request.

Automate your SDLC.
End to end.

Bosun orchestrates AI agents across every phase of your software development lifecycle, from issue to deployment. Define workflows once, run them across multiple repos in parallel, and ship merge-ready PRs without the back-and-forth.

SDLC automation
The Bosun package upgrade workflow: research the upgrade guide, update the package and its peers, resolve conflicts and run upgrades in parallel, fix test and linter issues, then prepare the pull request.

Legacy migrations.
Automated.

Stop stretching sprints across quarters to handle framework upgrades. Bosun workflows map your codebase, write the tests, execute the migrations and open the PRs. Your engineers receive detailed reports and evidence to confidently approve.

Legacy migrations
A Bosun migration workflow preparing a parity foundation pull request: prepare the environment, build parity, implement the parity foundation, then review and repair it.

The results speak
for themselves.

Each of these documents what was actually executed, where the claim boundary sits, and which controls stayed with the reviewers. Two are bounded proofs of value rather than completed programmes, and they say so.

Customer proof of value
Legacy PHP upgrades

Maintenance can continue without making senior engineers responsible for every repetitive detail again.

Technical proof of value
Perl to Rust migration

Modernisation becomes safer and faster when every slice has an explicit scope, rollbacks and evidence.

Case study
Frontend modernization

Turning a 15-year frontend migration into reviewable work.

Pick the first maintenance task.

Tell us where required change is piling up: security remediation, dependency updates, migrations, CI triage, review, or production issues.

Get a demo
We scope the first automation with you.
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