internal/

Package allow is the one marked-exception mechanism for the repo analyzers: a diagnostic whose line (or the line right below a stand-alone marker line) carries

Package asciifold catches registry lookups that fold Unicode case.

Package callbackunderlock catches calls through func-typed values while a sync mutex is held.

The join is recognized through the indirections a real bug wears: a local or struct field bound from it, a one-result helper whose body reduces to returning it (statements that only rebind the helper's parameters in front of the return do not hide it), and the one-arg string-preserving normalizers around it at the sink (strings.ToLower/ToUpper/TrimSpace — the usual key normalizers).

Package controlbytes catches request-derived strings reaching a log, span-attribute, or header sink without a control-byte scrub.

Package discardeddecode catches a request-shaped parse whose error is thrown away: `_ = json.NewDecoder(r.Body).Decode(&body)`, `_ = json.Unmarshal(b, &v)`, `_ = r.ParseForm()`, and the bare statement spelling that drops the result on the floor.

Package discardederr catches a multi-value assignment that drops an error on the floor while keeping the values around it: `ch, cancel, _ := m.subscribeImpl(id)`.

Package discardmutator catches security-state mutations whose result is discarded right where the handler acknowledges success.

Package divlimit catches integer division and remainder by a caller-supplied pagination-sized value that the function never guards against 0 or 1.

Package emitident catches names formatted into emitted code without an identifier gate.

Package errleak catches an internal error string being handed to the client on a 5xx response.

Package fieldtypeswitch makes adding a schema field type a checklist instead of a silent hazard.

Package fixedtmp catches a path under the shared temp root whose name is CONSTANT or pid-predictable reaching a create/mkdir/exec or build sink: os.Mkdir / os.MkdirAll / os.Create / os.WriteFile / os.OpenFile(write flags) on it, an exec.Command / exec.CommandContext argument (`go build -o <path>` writes through whatever is at the path; argv[0] runs it), or an exec.Cmd Dir assignment (the child's cwd).

Package fmtformat catches URL-encoder output (url.Values.Encode, url.QueryEscape, url.PathEscape) becoming part of a fmt format string.

Package hygiene holds the small checks whose whole point is that they currently find nothing.

Package intwrap catches the two integer-wrap postures that slip past range checks: unsigned→signed conversion without a bound, and unary negation of MinInt inside an abs.

Package laxcoerce catches a wrong type masquerading as absence: a comma-ok type assertion on a map[string]any entry whose failure path returns zero values with a nil error — or continues — as though the key had never been sent.

Package mapwriter catches nondeterministic SSR output at its source: ranging over a Go map while writing into an output builder emits attributes/markup in a different order every render.

Package names is the dependency-free list of repo analyzer names: the vocabulary of the //gofastr:allow(<name>) marker.

Package recovercallback catches registry callbacks invoked with no recover in scope on a dispatch path that has no net.

Package reflectset catches reflect.Value mutation of a struct field that never passed through CanSet: Set, SetString, SetInt, and the rest of the Set* family panic on values obtained from an unexported field, and the panic fires at injection time, not at declaration time, so a single lowercased tagged field takes down every request.

Package reqparamlimit catches unclamped request-sourced integers flowing into limit/cap-shaped call parameters.

Package rootwrite catches writes whose containment under a root is resolved lexically only: os.WriteFile / os.Create / os.OpenFile(write flag) / os.MkdirAll on a path built under a root — filepath.Join, or a flat `root + "/" + x` concatenation — where the root is a caller-supplied parameter or field — with no filepath.EvalSymlinks on that path's chain — plus the archive twin: zip.Writer entry names assembled from a parameter with no path.Clean on the entry-name chain.

Package secretcompare catches a client-supplied credential compared with == or != instead of a constant-time primitive.

Package testgap reports validator enumeration arms that no fixture in the package ever exercises.

Package timestampid catches an identifier minted from wall-clock time: a time.Now().Unix()/.UnixMilli()/.UnixNano() value formatted into a string (fmt.Sprintf, strconv.FormatInt/FormatUint/Itoa, or + concatenation) and bound to a name ending in id, token, session, key, nonce, secret, or capability.

Package unboundedbody catches an inbound HTTP request body that is read or decoded without a size cap, so a single request can spend the server's memory.

Package worldreadable catches files and directories written for state or secrets with group/other permission bits: os.WriteFile / os.Create / os.OpenFile(write flags) / os.Mkdir / os.MkdirAll whose mode is a CONSTANT literal carrying group or other bits (0644, 0755, 0666, 0777; os.Create is umask-default 0666), while this repo's own discipline for that artifact class is owner-only (0600/0700 plus fileperm.Restrict, pinned by battery/log, upload storage, the session sqlite store and DEK, freeze's world.json, and the credstore).