Product Decisions This Supports
- Framework-tiering on the roadmap. Decides whether we run a single mandated stack (Laravel/Symfony) or allow a sanctioned "small service" tier for internal APIs, webhooks, and cron endpoints. Proton is a concrete data point on what a minimal PHP service costs in lines-of-code and concepts.
- Build vs. buy vs. borrow. The real deliverable here is not the dependency — it's a reference architecture. Proton's shape (thin HTTP kernel, PSR-7 request/response, middleware pipeline, container-wired handlers, route registration) is a checklist for a ~500-line internal scaffold we could own outright instead of importing.
- Dependency governance policy. Stars 0 / dependents 0 / score 0 is an unambiguous dormancy signal. This package is the worked example for defining an "approved dependency" bar: maintained release cadence, at least one downstream dependent, security-response path, named maintainer succession. Adopting it would be a policy violation; writing the policy around it is a product decision.
- Scoring-model calibration. An
opportunity score of 6.59 against zero dependents and no visible traction is a false positive. That's a tooling roadmap item — add maintenance-recency and reverse-dependency floors to the score so PMs aren't handed attractive-looking dead packages.
- Vendor-risk and exit-cost framing. Supports a standard "what happens when the maintainer stops" template (fork plan, vendored copy, replacement candidates) applied to every micro-dependency we take on.
- Service-template scoping. If we greenlight a lightweight tier, this defines the acceptance criteria that template must meet — and, by contrast, the features it must not omit (config, logging, error handling, migrations).
When to Consider This Package
Consider it as a study artifact, not a dependency, when:
- We're designing or reviewing an internal scaffold and want a compact, opinionated example of middleware + DI + routing in PHP.
- The workload is genuinely small: a handful of JSON endpoints, single-team ownership, non-customer-facing, expected lifespan under roughly 12 months, low blast radius on failure.
- The team can vendor or fork the code and accept full ownership of security patching — i.e., we treat it as source material, not a versioned library.
- Prototyping or spike work where bootstrapping speed beats longevity.
Look elsewhere when any of the following hold:
- Anything customer-facing, regulated, or multi-year. No maintenance signal means no coordinated security response — unacceptable for PCI-, HIPAA-, or GDPR-scoped surfaces.
- You need an ecosystem. Auth, queues, ORM, migrations, admin panels, mail, observability hooks — Laravel and Laravel Zero already solve these; a micro-framework pushes that cost back onto us.
- Hiring and onboarding matter. Zero dependents means zero Stack Overflow answers, zero tutorials, zero candidates who've seen it. Every internal convention becomes undocumented tribal knowledge.
- You'd have to write the framework anyway. If the service needs more than routing and middleware, you've rebuilt a full framework badly and privately.
- Maintenance is a hard requirement. Prefer Slim, Mezzio, or Laravel Zero — comparable conceptual weight, active releases, real communities.
How to Pitch It (Stakeholders)
Executive summary. Proton is a small, single-maintainer PHP micro-framework. It is effectively dormant — no visible community adoption and no downstream packages depending on it — so we should not take it on as a production dependency. It is, however, a useful and inexpensive reference for how little code a minimal PHP service actually requires, which informs a decision we do need to make: whether to keep forcing every internal endpoint into a full framework. Recommendation: spend a short, time-boxed spike (1–2 engineer-days) extracting the pattern, benchmark it against Slim and Laravel Zero, and return with a recommendation on a sanctioned lightweight service tier. Do not add this package to any production service. Zero licensing cost, but the real cost is ownership: unmaintained code means we inherit security patching indefinitely.
For engineering. The value is structural, not functional: it shows a compact middleware pipeline, container-based handler wiring, and explicit route registration — the exact pieces our internal cron jobs and webhook receivers keep re-implementing ad hoc. Read it, don't require it. Our comparison set is Slim (closest 1:1), Laravel Zero (if we want the Laravel ecosystem minus the web sprawl), and Mezzio (if PSR-15 middleware is the organizing principle). Success criteria for the spike: a working scaffold under a few hundred lines, one documented upgrade path, and a clear statement of what we'd have to build and own. If it can't beat composer require slim/slim on total cost of ownership, we standardize on Slim and close the question.