> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tuturuuu.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Pre-push checks

> Run the build-free changed-files gate before pushing so cheap CI failures are caught locally in seconds.

## Why this gate exists

Most avoidable CI failures come from cheap checks skipped before pushing: Biome
formatting, `flutter analyze` infos (fatal in CI), TypeScript errors such as
`TS6059` (a package importing app source outside its `rootDir`), stale generated
inventories and branch names the checker rejects. `bun check` is too heavy for
agent machines because its Turbo graph can build workspace dependencies, so it
is not run locally. `bun check:changed` is the replacement before every push.

```bash theme={null}
bun check:changed                 # working tree vs merge base with origin/main
bun check:changed --dry-run       # print the planned steps only
bun check:changed --only biome    # one step (ids or prefixes such as type-check)
bun check:changed --skip vitest   # skip a step family
bun check:changed --committed     # committed changes only (the hook's mode)
bun check:changed --files a.ts b.ts
```

It never runs builds, `bun check` or Turbo. Small repository scripts run directly;
Vitest, type-check and `flutter analyze` are queued through `ttr resources run`
when resource control is installed and enabled (`--no-ttr` opts out). Without
ttr, steps run sequentially with Vitest capped at two workers.

## What runs for which paths

| Changed paths | Steps |
| - | - |
| Any | Branch name (same pattern as `branch-name-check.yaml`), source-size ceiling, docs inventory and app SEO `--check` |
| JS/TS/JSON/CSS outside `apps/mobile` | Biome `check --error-on-warnings` on those files (pinned 2.5.13); Oxlint on JS/TS files as an **advisory** step |
| `apps/*` or `packages/*` source | App-session, satellite cookie and server-console guards |
| A workspace's source, `tsconfig*.json` or `package.json` | Type-check of the projects its `type-check` script checks |
| A workspace with a Vitest config | Changed tests plus colocated `foo.test.ts(x)` and `__tests__/foo.test.ts(x)` siblings |
| `scripts/`, `.github/actions/`, `plugins/` | Changed and sibling `node --test` files |
| `.github/workflows/` or `.github/actions/` | Workflow concurrency, Bun pin and workflow-config policy tests |
| `apps/mobile/` | `flutter gen-l10n` first when ARB files changed, `dart format` on changed Dart files, then `flutter analyze lib test` exactly as `mobile.yaml` runs it |
| `apps/*/messages/*.json` | i18n sort and en/vi key parity |
| Migrations, docs, web API routes | Migration timestamps, docs audit, legacy route wrappers, mobile API mappings |

Oxlint stays advisory until a scope records Biome parity under the
[Oxc adoption rules](https://docs.tuturuuu.com/build/development-tools/oxc-cloudflare-adoption.md); Biome
remains the blocking formatter and linter. Paused runtimes are excluded.

## Type-checking without built declarations

CI builds `@tuturuuu/types`, `supabase`, `internal-api` and `masonry` before
type-checking. Local checkouts usually lack those `dist` declarations, which
produces thousands of missing-module errors and implicit-`any` cascades. The
gate runs `-p <project> --noEmit --incremental false --composite false` per
project and classifies diagnostics:

* With every workspace declaration present, all diagnostics block.
* When declarations are cold, missing-module errors citing an unbuilt workspace
  package are ignored. Configuration errors (`TS5xxx`/`TS6xxx`, including
  `TS6059`) and errors in changed files that do not import an unbuilt package
  block. A changed file importing a missing package still blocks on real type
  errors such as TS2322; only implicit-any follow-ons (7005/7006/7031/7034)
  in that file are advisory. Diagnostics in unchanged files remain advisory.

Shared-package changes also select transitive reverse dependents from workspace
manifests. Root/shared configuration changes (`package.json`, `bun.lock`, root
`tsconfig.json`, `biome.json`, `turbo.json`, `bunfig.toml`, `.npmrc`,
root `vitest.config.ts`, `.oxlintrc.json`, `.oxfmtrc.json`, and
`packages/typescript-config`)
print **not covered; CI only** because this focused gate cannot prove their full
repository effect. CI type-checking remains authoritative.

### Optional tsrs shadow

`--checker auto` and `--checker tsc` use tsc only. Existing clean-source
qualification does not establish that tsrs catches seeded errors, so a tsrs
pass cannot replace tsc. `--checker tsrs` requests advisory comparisons, always
followed by tsc regardless of success, failure or crash. Only tsc can block.
The resolver runs only if at least one planned project is in the recorded
qualification set; unqualified-only plans fall back to tsc. Hook mode uses only
an existing `TSRS_BIN`, with no network fetch. Outside hooks, pinned npm
resolution disables install lifecycle scripts. See the
[qualification limits](https://docs.tuturuuu.com/build/development-tools/tsrs-shadow-type-check.md).

## Optional pre-push hook

`bun install` already points `core.hooksPath` at `.githooks`. The pre-push hook
is inert until you opt in:

```bash theme={null}
git config tuturuuu.prePush true   # every push in this clone and its worktrees
TUTURUUU_PRE_PUSH=1 git push       # a single push
TUTURUUU_PRE_PUSH=0 git push       # skip once while opted in
```

The hook refuses tracked staged or unstaged edits so it can check the exact
pushed HEAD. It also refuses untracked files in changed workspaces and selected
reverse dependents because those files can affect type-checking and test discovery.
When script tests are selected, the fence covers `scripts/`, `plugins/` and
`.github/actions/` as well as the tests' own parent directories, so nested tests
cannot depend on untracked helpers in a parent or sibling directory.
Ignored files are excluded from this check. NUL-delimited Git paths preserve
whitespace; only option-like repository/workspace-relative prefixes are rejected
before file tools run. Internal dash directories, including Git app routes, are valid. The hook checks committed changes only and skips deletions or pushes of refs
other than `HEAD`. Agents should run `bun check:changed` explicitly before
pushing whether or not the hook is enabled.

### Bun upgrade and lock normalization

Until the Bun 1.4.4 upgrade in #6427 lands, a normal `bun install` with installed
Bun 1.4.4 can normalize the 1.4.3-era `bun.lock`. The resulting tracked change
makes the opted-in hook refuse a push. Prefer `bun install --frozen-lockfile`
for the existing lock or the repository-pinned Bun version; do not commit
incidental normalization into an unrelated PR. If drift already exists, preserve
its provenance and use a clean isolated checkout. #6427 owns the normalized lock;
a passing frozen install alone does not prove a normal install leaves it stable.

## Regression coverage

`scripts/check-changed.test.js`, `scripts/check-changed/plan.test.js`,
`scripts/check-changed/type-check.test.js`, `scripts/check-changed/tsrs.test.js`
and `scripts/ts-diagnostics.test.js` cover path mapping, the branch pattern's parity with the workflow, hook opt-in,
ttr queueing, cold-declaration classification and tsc confirmation of tsrs
failures.


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