Fast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPS
This report summarizes scanner evidence for caddyserver/caddy, a Go project with 77,686 GitHub stars. SynthScan examined 129,670 lines of code across 447 source files, recording 622 pattern matches distributed across 9 syntactic categories. The legacy adjusted pattern signal is 5.0 (Moderate pattern signal); it is not an authorship estimate.
Use the findings to ask whether maintainers can explain intent, verify dependencies, simplify unnecessary scaffolding, and focus review effort. Risk Payload v1 adds ownership, supply-chain, over-engineering, and review-effort vectors when available. These are prompts for human verification, not probabilities, security findings, or measured maintenance costs.
Use each vector to guide manual verification of the underlying findings.
Can maintainers explain intent, assumptions, and trade-offs? 620 finding(s).
Are imports declared and package/API names verified? 2 finding(s).
Are wrappers, guards, and repeated structures necessary? 0 finding(s).
Which changes need focused human review? 622 finding(s).
This chart tracks the legacy adjusted pattern score across scan runs. Changes can reflect source changes, scan coverage, or detector/scoring versions; they do not measure AI adoption or prove that a team refactored code. Compare runs only when their scoring versions are compatible. The dashed line tracks the raw pattern-hit count.
Groups findings by configured severity weight. Severity is not a confidence estimate, security rating, or proof that a package is missing. Verify imports against the project's manifests and inspect each finding in its local design context.
This horizontal bar chart shows where configured pattern scores accumulate across directories. Treat the bars as locations to inspect, not as evidence of authorship or code quality. Use the file-level findings to decide whether a directory needs a focused ownership, dependency, complexity, or review check.
The scanner identified 622 distinct pattern matches across 9 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a detector match to inspect in context. Expand any category row to inspect the individual file paths, line numbers, code snippets, and the lexical context (CODE, COMMENT, or STRING) in which each match was detected.
Reading the findings table: The Severity column indicates the configured finding weight (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — legacy comment-context matches receive a ×1.5 score weight. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier under the legacy scoring model.
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | admin_origin_case_test.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | usagepool.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | usagepool.go | 21 | ) | COMMENT |
| LOW | usagepool.go | 41 | // their lifespan. This is helpful, for example, when | COMMENT |
| LOW | listeners.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | listeners.go | 41 | // NetworkAddress represents one or more network addresses. | COMMENT |
| LOW | listeners.go | 101 | } | COMMENT |
| LOW | listeners.go | 121 | // listeners, be sure to Close() them when you are done. | COMMENT |
| LOW | listeners.go | 701 | return network + "/" + addr | COMMENT |
| LOW | listeners_port_span_test.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | logging.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | logging.go | 41 | // Logging facilitates logging within Caddy. The default log is | COMMENT |
| LOW | logging.go | 61 | // servers. | COMMENT |
| LOW | logging.go | 461 | COMMENT | |
| LOW | caddy_test.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | sigtrap.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | service_windows.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | replacer_fuzz.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | usagepool_test.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | admin_checkhost_case_test.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | listen_unix_test.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | filesystem.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | admin_test.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | logging_test.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | listeners_fuzz.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | context_test.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | storage.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | storage.go | 101 | } | COMMENT |
| LOW | modules_test.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | filepath_windows.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | admin.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | admin.go | 61 | // by setting the `CADDY_ADMIN` environment variable. | COMMENT |
| LOW | admin.go | 81 | // parsed by Caddy. Accepts placeholders. | COMMENT |
| LOW | admin.go | 101 | // socket's network interface or if `enforce_origin` is true. If not | COMMENT |
| LOW | admin.go | 121 | // | COMMENT |
| LOW | admin.go | 141 | LoadRaw json.RawMessage `json:"load,omitempty" caddy:"namespace=caddy.config_loaders inline_key=module"` | COMMENT |
| LOW | admin.go | 161 | // secure TLS connections can be made using them. | COMMENT |
| LOW | admin.go | 181 | // EXPERIMENTAL: Subject to change. | COMMENT |
| LOW | admin.go | 301 | func (admin AdminConfig) allowedOrigins(addr NetworkAddress) []*url.URL { | COMMENT |
| LOW | admin.go | 321 | // security checks, the infosec community assures me that it is secure to do | COMMENT |
| LOW | admin.go | 361 | origin = &url.URL{Host: originStr} | COMMENT |
| LOW | context.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | context.go | 141 | // pointer and returns the loaded module(s). The struct pointer and its field name as | COMMENT |
| LOW | context.go | 161 | // in the "http.handlers" namespace, you'd put: `namespace=http.handlers` in the | COMMENT |
| LOW | context.go | 461 | } | COMMENT |
| LOW | context.go | 561 | // Originally, this method's signature was `Logger(mod Module)`, | COMMENT |
| LOW | listen_unix.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | listen_reuseUnixSocket_windows.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | replacer.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | replacer_test.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | sigtrap_nonposix.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | caddy.go | 1 | // Copyright 2015 Matthew Holt and The Caddy Authors | COMMENT |
| LOW | caddy.go | 41 | COMMENT | |
| LOW | caddy.go | 61 | // have good, documented default values. If a parameter is required, the docs | COMMENT |
| LOW | caddy.go | 141 | return err | COMMENT |
| LOW | caddy.go | 401 | COMMENT | |
| LOW | caddy.go | 481 | // If `newCfg` is nil a new empty configuration will be created. | COMMENT |
| LOW | caddy.go | 941 | // CustomVersion is an optional string that overrides Caddy's | COMMENT |
| LOW | caddy.go | 961 | // Set this variable during `go build` with `-ldflags`: | COMMENT |
| LOW | caddy.go | 981 | var CustomLongDescription string | COMMENT |
| 538 more matches not shown… | ||||
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | listeners.go | 397 | // port to take advantage of standard library's robust parser, then | COMMENT |
| MEDIUM | caddyconfig/caddyfile/formatter_test.go | 908 | // equal that of the input. This is stronger and more robust than comparing | COMMENT |
| MEDIUM | caddyconfig/httpcaddyfile/addresses.go | 192 | // Identical entries are deleted from the addrToServerBlocks map. Essentially, each pairing (each | COMMENT |
| MEDIUM | modules/caddyhttp/app.go | 43 | // App is a robust, production-ready HTTP server. | COMMENT |
| MEDIUM⚡ | …ddyhttp/encode/testdata/caddy_config_http_servers.json | 1 | {"status_code":200,"result":{"structure":{"type":"map","map_keys":{"type":"string"},"elems":{"type":"struct","type_name" | CODE |
| MEDIUM⚡ | …ddyhttp/encode/testdata/caddy_config_http_servers.json | 1 | {"status_code":200,"result":{"structure":{"type":"map","map_keys":{"type":"string"},"elems":{"type":"struct","type_name" | CODE |
| MEDIUM⚡ | …ddyhttp/encode/testdata/caddy_config_http_servers.json | 1 | {"status_code":200,"result":{"structure":{"type":"map","map_keys":{"type":"string"},"elems":{"type":"struct","type_name" | CODE |
| LOW⚡ | …ddyhttp/encode/testdata/caddy_config_http_servers.json | 1 | {"status_code":200,"result":{"structure":{"type":"map","map_keys":{"type":"string"},"elems":{"type":"struct","type_name" | CODE |
| MEDIUM⚡ | …ddyhttp/encode/testdata/caddy_config_http_servers.json | 1 | {"status_code":200,"result":{"structure":{"type":"map","map_keys":{"type":"string"},"elems":{"type":"struct","type_name" | CODE |
| LOW | modules/caddyhttp/headers/headers.go | 343 | // see issue #4330 for why we don't simply use hdr[fieldName] | COMMENT |
| MEDIUM | modules/caddytls/ech.go | 442 | // TODO: Potentially utilize the timestamp (map value) for recent-enough publication, instead of just checking for | COMMENT |
| MEDIUM | modules/caddytls/tls.go | 541 | // It's a bit nuanced: managed certs can sometimes be different enough that we have to | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | modules/caddyhttp/encode/testdata/caddy_home.html | 1311 | <div title="Don't forget to sign our guestbook!"><img alt="0" title="Hit counter" src="data:image/png;base64,iVBORw0K | CODE |
| MEDIUM⚡ | …ddyhttp/encode/testdata/caddy_config_http_servers.json | 1 | {"status_code":200,"result":{"structure":{"type":"map","map_keys":{"type":"string"},"elems":{"type":"struct","type_name" | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | .github/workflows/release.yml | 238 | # Check if commits match (if proposal had a target commit) | COMMENT |
| LOW | .github/workflows/release-proposal.yml | 61 | # Check if commit exists | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| MEDIUM | .github/workflows/release-proposal.yml | 135 | # Create a new branch for the release proposal | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | modules/caddyhttp/reverseproxy/fastcgi/client.go | 143 | // keepAlive bool // TODO: implement | COMMENT |
| LOW | modules/caddypki/maintain.go | 71 | // TODO: implement root renewal (use same key) | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | modules/caddyhttp/templates/tplcontext.go | 531 | // NOTE: This function is EXPERIMENTAL and subject to change or removal. | COMMENT |
| LOW | modules/caddyhttp/templates/templates.go | 368 | // NOTE: This function is EXPERIMENTAL and subject to change or removal. | COMMENT |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | replacer_test.go | 544 | name: "placeholder", | CODE |
| LOW | modules/caddyhttp/templates/tplcontext.go | 91 | "placeholder": c.funcPlaceholder, | CODE |
| Severity | File | Line | Snippet | Context |
|---|---|---|---|---|
| LOW | modules/caddyhttp/rewrite/rewrite.go | 228 | // before continuing, we need to check if a query string | COMMENT |