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Caddy Config Linter & Auto-Migrator
Build a web app and CLI that analyzes reverse proxy configs, flags obsolete directives, and proposes safe simplifications based on current behavior. The strongest value is reducing config bloat, avoiding stale tutorial patterns, and restoring trust for users who want modern setups without reading changelogs and pull requests.
Why this matters
You set up your reverse proxy once, it works, and then months later you discover half the file reflects older behavior that is no longer needed. The problem is not writing a few lines of config; it is knowing whether a simplification is actually safe. You end up reading scattered discussions, changelogs, and examples, then hesitate to touch a working system because a wrong change could break TLS or routing. A tool that reads your current config, explains what is outdated, and shows a low-risk upgrade path would remove a lot of uncertainty for both hobby operators and lean engineering teams.
- · Built for Self-hosters, DevOps-minded developers, and small teams running Caddy or migrating to it who want safer, cleaner configurations with less manual research..
- · Most likely monetization: Freemium.
The Pain · Narrative
You set up your reverse proxy once, it works, and then months later you discover half the file reflects older behavior that is no longer needed. The problem is not writing a few lines of config; it is knowing whether a simplification is actually safe. You end up reading scattered discussions, changelogs, and examples, then hesitate to touch a working system because a wrong change could break TLS or routing. A tool that reads your current config, explains what is outdated, and shows a low-risk upgrade path would remove a lot of uncertainty for both hobby operators and lean engineering teams.
Score Breakdown
Market Signal
Go-to-Market
Individual self-hosters and small SaaS teams already running Caddy in Docker who have touched their config more than once in the past year.
~50K active globally in the reachable early-adopter segment
SEO long-tail
$12/month
25 active weekly users and 10 paying users from search traffic around config cleanup terms within 30 days
MVP Scope · 1–2 weeks
- Build a parser that accepts Caddyfile input and normalizes directives into structured JSON
- Implement 10 high-confidence modernization rules based on current defaults and common legacy patterns
- Create a simple web UI that pastes config and returns warnings plus suggested replacements
- Add diff rendering so users can compare old and proposed config safely
- Publish a landing page with one example before-and-after cleanup flow
- Package the same rules into a CLI for local and CI usage
- Add version selector so recommendations vary by installed proxy version
- Implement safety labels such as low-risk, review-needed, and advanced-edge-case
- Create sample import tests from public config snippets to improve parser robustness
- Launch beta access with email capture and usage analytics
Differentiation
Why This Might Fail
Self-rebuttal — the most important trust signal
- 1The problem may be frequent but not painful enough to sustain recurring subscriptions because many users only clean configs once or twice a year.
- 2Open-source maintainers or community contributors could quickly release a free linter that captures most of the value.
- 3Users may not trust automated rewrite suggestions for production networking without extensive validation and social proof.
Evidence Summary
How AI synthesized this insight — no verbatim quotes
Discussion repeatedly centered on stale guidance, obsolete wildcard certificate advice, and users discovering their configs could be significantly reduced. Several participants said they had followed older examples and only later learned the defaults had changed. Others explicitly linked poor documentation to avoiding or leaving the tool. That combination supports a focused product around modernization, trust, and safe cleanup.
Action Plan
Validate this opportunity before writing code
Recommended Next Step
Build
Strong demand signals detected. Real pain, real willingness to pay — start building an MVP.
Landing Page Copy Kit
Ready-to-paste copy based on real Reddit community language — no editing required
Headline
Caddy Config Linter & Auto-Migrator
Sub-headline
Build a web app and CLI that analyzes reverse proxy configs, flags obsolete directives, and proposes safe simplifications based on current behavior. The strongest value is reducing config bloat, avoiding stale tutorial patterns, and restoring trust for users who want modern setups without reading changelogs and pull requests.
Who It's For
For Self-hosters, DevOps-minded developers, and small teams running Caddy or migrating to it who want safer, cleaner configurations with less manual research.
Feature List
✓ Config parser with obsolete-pattern detection ✓ One-click modernization suggestions with diff view ✓ Risk scoring and rollback guidance ✓ Version-aware rules for certificates, redirects, and defaults ✓ CLI and GitHub Action for CI validation
Where to Validate
Share your landing page in r/r/selfhosted — that's exactly where these pain points were discovered.
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