3x-ui/REVIEW.md

Review instructions

3x-ui is a Go (Gin + GORM) web panel that generates configuration, share links and subscriptions for other programs — Xray-core, mihomo, sing-box, mtg-multi — and is deployed by operators who upgrade in place. Judge findings by what breaks for those consumers and operators, not by style.

Severity

Mark every finding with exactly one of these, at the start of the finding:

Marker	Severity	Use it for
🔴	Important	A defect this pull request introduces or makes worse, in one of the classes under "What Important means here". Worth fixing before it merges.
🟡	Nit	Style, naming, refactoring, and an ordinary CLAUDE.md violation the change introduces — a source comment block over two lines, a fix larger than the bug it removes, a test CLAUDE.md rejects outright.
🟣	Pre-existing	A real bug you hit while reading that this pull request neither introduced nor made worse.

Not every CLAUDE.md rule is a nit. The three listed below — the dispatch rule, the migration rule, the endpoint chain — are Important, because each one passes every local test and breaks a real deployment.

Severity follows what this pull request did, not how alarming the defect looks on its own. One the change worsens is 🔴 for the regression it added, not for the whole defect; one it merely brought into view is 🟣.

Checking what this panel emits means reading far more code than the diff changes, so pre-existing bugs surface on every review. One already on the base branch stays 🟣 however bad it is: this pull request did not cause it, so it cannot be a reason to hold this pull request. Say in one clause that it predates the change. The exception is a live security hole on an exposed surface — still 🟣, but open the summary with it.

What Important means here

• Security on the exposed surfaces: internal/web/controller/, session and middleware code, the PUBLIC internal/sub/ subscription server, and Xray config generation in internal/xray/.
• A state-changing inbound or client operation that bypasses runtime.Runtime (internal/web/runtime/) and calls internal/xray/api.go directly, or dispatches from a controller or cron job. It passes every local test and silently breaks every multi-node deployment.
• A schema or model change without a matching hand-written migration in internal/database/db.go, one that behaves differently on SQLite and PostgreSQL, or one that loses or overwrites operator data on upgrade or rollback. There are no migration files and no down-migrations.
• A change to what the panel emits on the wire — Xray config JSON, share links, subscription/Clash YAML, mtg-multi TOML — that a downstream client would reject or read differently, or that makes the three independent link implementations (Go internal/util/link/ + internal/sub/, TS frontend/src/lib/xray/, TS docs/lib/xray/) diverge from one another.
• Any edit to .github/workflows/: this repository runs workflows with secrets against a public fork stream. Untrusted expression interpolation into run: blocks, broadened permissions, weakened guards, or a job that executes pull-request code.

Always check

• A new g.POST/g.GET in internal/web/controller/ needs the whole chain: an entry in frontend/src/pages/api-docs/endpoints.ts, regenerated artefacts (make gen), any new API-boundary struct added to StructAllow in tools/openapigen/main.go, and frontend/public/openapi.json copied to docs/public/openapi.json with the docs MDX regenerated (cd docs && pnpm gen:api). CI checks the first three; the docs copy is checked by nothing — a missed copy is Important, not a nit.
• A bug fix carries a test that would fail without the fix. A test that cannot tell the broken behaviour from the fixed one passes before and after, so it certifies nothing and is itself the finding — asserting only err != nil or len(x) > 0, or going green by regenerating golden fixtures or Vitest snapshots.
• No second way to do a thing already decided: Go tests are stdlib testing (never testify), the panel is Ant Design (never Tailwind or shadcn). Neither golangci-lint nor oxlint forbids the import, so it passes CI clean.

Do not report

• Anything CI already enforces: golangci-lint and gofumpt, oxlint, format and typecheck, govulncheck, and npm audit --omit=dev --audit-level=high. A dev-dependency advisory is out of scope on purpose: it ships to nobody.
• The contents of generated files (frontend/src/generated/, frontend/public/openapi.json, docs/public/openapi.json) or lock files. Those files being STALE after a source change is reportable; their style is not.
• Missing tests for getters, constants, renames or pure map lookups — CLAUDE.md rejects such tests outright.
• A missing or unreferenced i18n key. frontend/src/test/i18n-dead-keys.test.ts pins the 13 locale files in internal/web/translation/ in both directions, so the frontend job is already red. Report the failing check, not the key.

A higher bar, not silence

Everything named under "What Important means here" gets full scrutiny. Two areas do not — they earn review, but report there only what you are near-certain about and that actually breaks something:

• docs/ — the standalone Fumadocs site, with its own CI and its own dependency tree. docs/lib/xray/ is the exception and gets full scrutiny: it is the third link implementation.
• internal/web/translation/ — the key set is CI's job and the wording of a translation is nobody's here.

Verification bar

• A claim about behaviour needs a file:line citation from this repository, not an inference from a name.
• A claim that a downstream client rejects or requires a wire-format detail — a config key, JSON tag, URI query parameter, YAML or TOML key, an encoding or hash choice — must name the upstream symbol that decides it (repository, file, identifier). If you cannot verify it, keep the finding but say explicitly that it is unverified instead of asserting it.
• "CI passed" is a claim too, and needs the same evidence: say it only of a run you actually read. A green one proves less here than it looks — only postgres-durable-first runs against PostgreSQL, go-test and race are SQLite, and XRAY_E2E_BINARY and XUI_SCALE_TEST are set by no job, so those tests have never run in CI at all. Where a change touches dialect, migration or Xray gRPC code that no job exercised, say it is unverified rather than repeating a green tick as proof.

Cap the volume

🔴 findings are never capped. Report every one.

Report at most five 🟡 nits and at most three 🟣 pre-existing bugs. Past that, say "plus N similar" in the summary instead of posting them.

A cap decides WHICH ones survive, so choose rather than truncate: the same nit repeated across files is ONE finding with a count, not five slots; a nit in code this pull request wrote outranks one in code it only moved; and a nit nobody would act on does not deserve a slot at all.

After the first review of a pull request, report 🔴 findings only: a one-line fix must not reach round seven on style.

What the comment must show

Open with a one-line tally — 2 🔴 / 4 🟡 / 1 🟣 — so the author sees the shape of the review before the detail. When nothing is 🔴, lead with No blocking issues and put the tally after it.

The posted comment is the only part of a review anyone sees, so a bare "no issues found" is a receipt, not a review: nothing in it says whether the diff was read or the run died early. Every comment therefore ends with a short coverage list — one line per area actually checked, naming what was examined and what it turned out to be, plus the head SHA and the size of the diff it covers. Say which claims could not be verified and why, including a check this environment blocked. Keep that coverage list under ten lines; it is evidence, not a retelling of the pull request.