// solutions - legacy modernisation
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.
15×
Faster than
manual migration
manual migration
40+
Languages &
runtimes supported
runtimes supported
90%
Production-ready
on first PR
on first PR
<1%
Regression rate
on migrated code
on migrated code
// what bosun migrates
We've seen
it before.
Real codebases. Real constraints. Bosun has navigated the complexity that makes engineering teams hesitant to even start.
E-commerce
Small company
→
Shopify Templates Tamed
Wild growth of Shopify templates was making every new feature deployment a regression risk. Bosun mapped the template sprawl, introduced structure, and enabled the team to ship features confidently without breaking existing storefronts.
Compliance
Enterprise acquisition
→
AngularJS → VueJS
A company acquired by a large corporate needed to meet strict enterprise compliance requirements. A Bosun workflow was able to extract features from their 15-year-old AngularJS monolith, modularising, modernising, and porting them to VueJS while adhering to style and code quality standards.
Security
Two mid-sized companies
→
PHP & Laravel Upgrades
Outdated PHP dependencies were creating active security exposure. Bosun upgraded and now maintains their dependency chains, including complex Laravel major version migrations, so they are no longer running vulnerable software in production.
Onboarding
Large enterprise
→
Living Documentation
A very large and old codebase with no documentation was slowing every new hire to a crawl. Bosun established and now maintains up-to-date documentation across the entire codebase, letting the team onboard new developers in days, not months.
// introducing bosun
Migrate and transform
your legacy code.
And automate the rest.
// how it works
Four stages.
One review queue.
Bosun automates maintenance work by capturing the process in workflows: establish the workflow, run it inside an isolated workspace, let agents execute the defined steps, and hand engineers a merge-ready PR with evidence.
Workflow
01
Establish the workflow
Start from an existing workflow, customise one to your stack, or
build a new one with Bosun's graphical editor and AI tools. The
workflow defines the steps, checks, permissions, and PR handoffs
before anything runs.
Sandbox
02
Provision an isolated workspace
Each run starts in a disposable environment with the selected
repositories, dependencies, services, tools, and scoped access
it needs. Agents get full context without getting broad access
to everything.
Agents
03
Execute the workflow steps
Inside the workspace, Bosun agents perform the steps described
in the workflow: inspect the codebase, execute the upgrade or
refactor, run the relevant checks, and fix failures iteratively.
For legacy work, the workflow can also include generating the
missing tests needed to move safely.
Review
04
Review a high-confidence PR
When the workflow clears its gates, Bosun opens a pull request
with the diff, logs, test evidence, and risk notes. Because the
run followed the defined process and produced the supporting
evidence, reviewers get a high-quality PR that is easy to verify
and sign-off on.
// why bosun vs alternatives
No hand-holding.
No hand-coding.
Manual migration
Engineers do it themselves
✕Months of sprint capacity consumed
✕Regressions caught late or not at all
✕Engineers context-switch from product work
✕No test coverage on legacy paths
✕Documentation never updated
✕Tribal knowledge bottleneck
Generic AI tools
Copilot, ChatGPT, etc.
△File-by-file, no cross-repo awareness
△Hallucinated diffs that don't compile
△No CI validation, engineer still runs it
✕Generated tests still need manual verification
✕No migration plan or risk analysis
△Still requires significant eng time
Bosun
Automated, end-to-end
✓Org-wide scan in minutes
✓AST-level with no hallucinated diffs
✓CI passes on first PR, every time
✓Tests written alongside every change
✓Ordered migration plan with risk scores
✓Engineers review, not execute
Stop deferring
your tech debt.
your tech debt.
Bosun turns a 6-month migration backlog into a series of reviewed PRs. Your engineers stay on product. The debt gets cleared.