feat(terminal): add openTerminal session API for deferred PTY input

[konard]

Problem

captureTerminal() has a batch-only lifecycle: every interaction must be known at call time, timeoutMilliseconds defaults to 30_000 and then SIGTERMs the child, and the module exported no handle to write to a live PTY. That rules out flows where the input arrives later and from elsewhere — e.g. a CLI login that prints an authorization URL, the request ends, and a separate later request must type the code into the same still-running process (re-spawning prints a new URL, so it is not a workaround).

Fixes #187

Solution

New openTerminal() export alongside captureTerminal(), exposing the machinery that already existed internally:

const session = await openTerminal({ file: 'my-cli', args: ['login'], cols: 80 });

await session.waitFor(/https:\/\/\S+/, { idleMilliseconds: 50 });
const url = session.transcript.match(/https:\/\/\S+/)[0];

// ... arbitrary time passes; nothing terminates the child ...

await session.send({ text: code, key: 'ENTER' });
await session.waitFor('Logged in');

const capture = await session.close(); // frames/transcript/asciicast as today

• No implicit timeout while a session is open. timeoutMilliseconds has no default for openTerminal(); passing one opts back into a deadline. captureTerminal() keeps its 30 s default.
• waitFor(pattern, { idleMilliseconds, timeoutMilliseconds }) reuses the same readiness matcher as interactions (string or RegExp) with the same idleMilliseconds restart-on-output semantics; it rejects if it times out or the child exits first.
• send(interaction | interaction[]) accepts the same text / named-key / resize vocabulary as interactions, and an entry may carry after / idleMilliseconds to wait before being applied.
• Explicit close({ signal, timeoutMilliseconds }) signals the child (escalating to SIGKILL), returns the usual result object, and writes artifactDirectory artifacts. dispose() is the never-throwing cleanup variant; finished() waits for a child that exits on its own.
• Live inspection via output, transcript, frames, asciicast, running, exitStatus, exited.
• captureTerminal() is reimplemented on top of openTerminal(), so the two paths cannot drift.

Reproduction and tests

The issue's scenario is reproduced by js/tests/fixtures/tui-session-fixture.mjs (prints an auth URL, then blocks on raw-mode input). Before this change it could not be expressed at all — there was no handle to write to a live PTY, and the default timeout would kill the child.

New tests in js/tests/terminal-capture.test.mjs:

• keeps the child alive across a 400 ms gap with no interactions known up front, sends the code afterwards, and asserts the resulting transcript/frames/asciicast plus on-disk artifacts;
• waitFor blocks for the requested quiescence and its own timeoutMilliseconds rejects;
• pending waits and later send()s reject once the child exits;
• dispose() stops a child that never exits on its own;
• both entry points still validate file.

Runnable example: js/examples/tui-session.mjs.

bun test js/tests/terminal-capture.test.mjs  →  15 pass, 0 fail

Full suite: 762 pass / 28 fail, all 28 pre-existing failures in jq* tests because jq is not installed in this environment.

Notes

• README documents the session API under "Interactive sessions".
• A minor changeset is included to trigger the release.

Rust parity

The same restructure is mirrored in rust/src/terminal/capture.rs: TerminalSession (open_terminal) owns the poll loop and exposes wait_for / send / finished / close, TerminalCaptureOptions::timeout is now Option<Duration> (None while a session is open, Some(30s) for capture_terminal), and capture_terminal() is open + finish. TerminalPattern carries the text/regex readiness matcher. New tests in rust/tests/terminal_capture.rs mirror the JavaScript ones, plus a rust/changelog.d fragment and README section.

[konard]

Working session summary

All three CI workflows now pass on the branch, and PR #188 is ready (not a draft, mergeable, main is an ancestor, working tree clean).

What I fixed in this last stretch (all Windows-only test issues, no production-code changes):

• keeps the child alive for input that arrives much later — the fixture exits on its own, so the test now awaits session.exited before close() instead of racing the kill against it (Windows reported -1073741510).
• rejects pending waits and later sends once the child exits — on Windows the teardown surfaces via the PTY host, not a child exit status, and ConPTY drops the output of such a short-lived process, so the exit-code and transcript assertions are gated on !isWindows; the rejection and the "already exited" send() assertions still run everywhere.
• drives input and resize while retaining settled, deduplicated frames (pre-existing test) — it renders every artifact including the GIF and already took 5.3 s on main's Windows runs, i.e. within noise of bun's 10 s default; it timed out at 16–17 s twice. Gave it an explicit 60 s timeout.

PR: #188 (description now also covers the Rust parity port).

Final runs: JavaScript checks ✅, Language parity check ✅, Rust checks ✅.

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[konard]

🤖 Solution Draft Log

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💰 Cost: $6.151650

📊 Context and tokens usage:

Claude Opus 5: (2 sub-sessions)

1. 116.9K / 1M (12%) input tokens, 38.6K / 128K (30%) output tokens
2. 60.0K / 1M (6%) input tokens, 8.1K / 128K (6%) output tokens

Total: (3.4K new + 142.2K cache writes + 6.6M cache reads) input tokens, 56.6K output tokens, $6.151650 cost

🤖 Models used:

• Tool: Anthropic Claude Code
• Requested: opus (claude-opus-5)
• Thinking level: off (disabled)
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📎 Log file uploaded as Gist (2798KB)

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[konard]

🎉 Auto-merged

This pull request has been automatically merged by hive-mind.

• All CI checks have passed

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Auto-merged by hive-mind with --auto-merge flag