79:T1e62,Four first-contact defects in the `scriptc` command line, each reproduced on main (714482d49) before the change. The compiler and the runtime are untouched: only the CLI's argument handling, its error text and its wording about Node islands change. ## 1. `scriptc run` dropped the program's arguments `scriptc run args.ts a b` printed `[]` for `process.argv.slice(2)` and exited 0. `run` now follows `node` and `tsx`: everything after the entry file is the program's, verbatim, including options and a `--`. scriptc's own options go before the file, and a `--` before the file ends them. | command | before | now | `node args.ts …` and `tsx args.ts …` | | --- | --- | --- | --- | | `scriptc run args.ts a b` | `[]` | `["a","b"]` | `["a","b"]` | | `scriptc run args.ts -- a b --flag` | `[]` | `["--","a","b","--flag"]` | `["--","a","b","--flag"]` | | `scriptc run args.ts a b --flag -- c` | `Unknown option '--flag'` and the help | `["a","b","--flag","--","c"]` | `["a","b","--flag","--","c"]` | **This changes one existing spelling:** `scriptc run file.ts --strip` used to strip, and now passes `--strip` to the program. Write `scriptc run --strip file.ts`. The help line is now `scriptc run [options] [args]`. `build` and `coverage` still take options anywhere. The tests and the Windows CI smoke that used the old order are updated here. `process.argv` keeps the shape the limitations page documents: `argv[0]` is `"scriptc"`, `argv[1]` is the executable's path, and arguments start at index 2, as in Node. One scanner (`programArgumentsStart`, driven by `CLI_OPTIONS`) finds where the program's arguments begin, for both the full CLI and the bootstrap's cached route. `CliHost.run` takes the arguments, the WASI runner forwards them, and the `scriptc_run` MCP tool gains an `args` list. ### Exit status and signals Exit codes already passed through. Two things did not: - A program killed by a signal made `run` exit 1. It now exits 128 plus the signal's number, as `tsx` does and as a shell reports for `node`. The line `scriptc: program killed by SIGSEGV` stays, except when `run` itself was sent the signal, so Ctrl-C ends quietly. - `run` had no signal handlers, so `kill`, a `timeout`, or a process manager stopped scriptc and left the program running. SIGTERM and SIGHUP now go to the program, and SIGINT too unless a terminal already delivered it to the whole foreground group; `run` then ends with the program's status. The Node-hosted CLI, the bootstrap and the native CLI now share one implementation (`cli/run-program.ts`), which moves the native CLI's `run` from `spawnSync` to `spawn`. ## 2. A missing entry file printed a compiler stack trace `scriptc run nope.ts` printed 17 lines ending in `at loadProgram7 (…/frontend/program.js:867:19)`. `run`, `build` and `coverage` now print one line and exit 1: ``` scriptc: entry file not found: /tmp/cli-repro/nope.ts ``` A directory gets `scriptc: entry is not a file: `. ## 3. A usage error printed 198 lines Every usage error appended the whole help, so the message scrolled away. All 49 of them now print the message and one pointer line. An unknown option also names the nearest valid one, and an unknown command names the nearest command or, for a source file, the `run` spelling: ``` $ scriptc build args.ts --optimisation dev scriptc: Unknown option '--optimisation' did you mean '--optimization'? Run 'scriptc --help' for the commands and options. $ scriptc args.ts unknown command "args.ts" to compile and run a file: scriptc run args.ts Run 'scriptc --help' for the commands and options. ``` ## 4. Stale wording about Node islands `--help` said `--node-islands`, `--node-island`, `--native` and `--node` were "REPORT-ONLY … builds compile as before", and the coverage report headed its section "would-be, report-only: the build is unchanged". Builds run island packages in Node by default and print `SC8001` notes saying so. - The option help now says what a build does under each policy. - The coverage header reads `Node islands (a build runs these in Node where it cannot compile them natively; --node-islands=auto)`. The qualifier is deliberate: the section is the detector's list, and it can name a package the build still compiles natively. `tests/coverage-fixtures/node-islands` lists four packages there, and a build of it islands one. - `--node ` is parsed and stored, and nothing reads it. Its help now says so instead of describing an effect. - The JSON envelope's `nodeIslands.mode: "would-be"` is a schema field and is left alone. ## Not changed: `run` prints no build warnings `run` shows none of the divergence warnings, SC6101 or `SC8001` notes that `build` shows. That is intended (`command.ts`: "`run` keeps stderr for the program's own output") and it keeps `run`'s output comparable with `node`'s, so it stays. The limitations page and the CLI page now state it. ## Proof All runs are in Vercel Sandboxes on Intel Xeon @ 2.90GHz. The gate and the bootstrap ran on this change at 933688a07 (base 714482d49); the PR head is the same commit rebased onto main, whose newer commits touch none of these files. - **Reproduction on main (714482d49):** each of the four defects, with `node` 24.22.1 and `tsx` for comparison. - **New tests:** `packages/cli/test/run-arguments.test.ts` (10 tests) runs the CLI as a process: arguments against `node` for six argument lists on the first build and on the bootstrap's cached route, the `process.argv` shape, options before the entry and `--`, exit codes, 128+N for a signal death, SIGTERM and SIGINT reaching the program, the missing entry for `run`, `build` and `coverage`, and the text of twelve usage errors. `packages/compiler/src/cli/usage.test.ts` (5 tests) covers the scanner. The MCP tests cover the `args` list, and the native-driver bootstrap test now runs a program with arguments through the native CLI. - **Focused tests:** `packages/cli/test`, `packages/compiler/src/cli`, `tests/harness/static-only.test.ts` and `tests/harness/coverage.test.ts` pass, with one exception that is not this change: `coverage.test.ts` "every corpus program is 100% static" hit its 600 s limit twice when run unsharded on 8 vCPUs (CI shards it; it calls `analyze`, not the CLI). - **A race found by those tests:** with the listeners installed after the program started, a SIGINT sent as soon as the program printed its first line ended scriptc alone and left the program running, in 2 of 40 rounds. Listening before the start: 450 of 450 rounds (150 each for SIGINT, SIGTERM and SIGHUP) end with the program's status. - **Zero-cost gate** (`bin/validate --skip=lanes,bench,t262,san-bootstrap`): PASS. 3807 programs identical, 68 fail on both sides, no differing row and no runtime-only row. Compile time within tolerance: bench geomean −0.45% [95% CI −1.22%, +0.92%], self −0.12% [−1.55%, +0.29%], fixtures −0.05% [−0.34%, +0.24%]. The candidate's compiler source builds with the candidate. - **Native bootstrap** (`tests/harness/self-hosting-native-driver.test.ts`, plain, 32 vCPU): passes in 2125 s (seed build 785 s, seed command and library probes 372 s, self-rebuild 666 s, Node and native IR and LLVM compared, rebuilt compiler emits itself 672 s). - **Self-hosting IR check:** `scriptc build packages/compiler/src/native/cli.ts --emit=ir` exits 0 with no `error SC` line. - **Docs gate** (`NEXT_DIST_DIR=.next-check pnpm check` in `docs/`): passes, 25 route tests. The three console blocks changed in the docs are real output of this build. - `pnpm lint` and `pnpm format:check`: clean. The sanitized bootstrap was not run: the change adds no lowering, record, object or closure mechanism, and CI runs it. 🤖 Generated with [Claude Code](https://claude.com/claude-code) 7a:Tefc,The latest updates on your projects. Learn more about [Vercel for GitHub](https://vercel.link/github-learn-more). | Project | Deployment | Actions | Updated | |:----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |:------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |:---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |:----------------------------------------------------------------------------------------- | | [scriptc](https://vercel.com/vercel-labs/scriptc) | ![Ready](https://cdn.trylle.com/media/images/c6f97f6a2d9a50bb079b9c2120bcabc5?key=Aag9OPWPryCkgfLUMIUiriowtODh4hqHlmlzdftFmfU8NF62NmcRWEZYaAzSgjXFV7CRHFmtwIUXQzGW%2FMiYFGynEBRM2ZcoaM4U6O0OS8PmNZa7IXMfoNTDcz9NEzKc17c%2BcAPOWyxWJVBjzZRRTanNPzdCPpYzbuN8NGKPs87X) [Ready](https://vercel.com/vercel-labs/scriptc/AsiUjXaa8Xrn3jW9jjWBUvf8iiEk) | [Preview](https://scriptc-git-fix-cli-run-fixes.labs.vercel.dev), [v0](https://v0.app/chat/api/open?vercelProjectId=prj_goqnlogfpmS51K3HvPpk2j0dfOsf&gitBranch=fix%2Fcli-run-fixes&vercelTeamId=team_nO2mCG4W8IxPIeKoSsqwAxxB&utm_source=pr-comment-table) | Nov 7, 2026 7:10am UTC | 7b:T733,Pass arguments through scriptc run and shorten the CLI's errors scriptc run dropped every argument after the entry file: the program saw an empty process.argv and exited normally. run now follows node and tsx: everything after the entry file is the program's, verbatim, including options and a `--`. scriptc's own options go before the file, and a `--` before the file ends them, so `scriptc run file.ts --strip` now passes --strip to the program. One scanner over CLI_OPTIONS finds where the program's arguments begin, for the full CLI and for the bootstrap's cached route. The WASI runner forwards the arguments, and the scriptc_run MCP tool takes them as `args`. A program killed by a signal made run exit 1; it now exits 128 plus the signal's number. run had no signal handlers, so stopping it left the program running: SIGTERM and SIGHUP now go to the program, and SIGINT too unless a terminal already delivered it to the foreground group. The Node-hosted CLI, the bootstrap and the native CLI share one implementation (cli/run-program.ts), which listens before it starts the program. A missing entry file reached the frontend, which threw: run, build and coverage now print one line naming the file and exit 1. Every usage error appended the 198-line help, which scrolled the message away. They now print the message and one line pointing at --help. An unknown option names the nearest valid one, and an unknown command names the nearest command, or the run spelling when it is a source file. The help and the coverage report described Node islands as report-only, with builds unchanged, although builds run island packages in Node and print SC8001 notes. The option help and the coverage header now say what a build does under each policy; --node, which nothing reads, says so. 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Commits on Sat, Nov 7, 2026