Server-side glue connecting the Terminal sidebar tab to the new
terminal-agent process.
server.ts:
- New POST /pty-session route. Validates AUTH_TOKEN, mints a gstack_pty
HttpOnly cookie via pty-session-cookie.ts, posts the cookie value to
the agent's loopback /internal/grant. Returns the terminalPort + Set-Cookie
to the extension.
- /health response gains `terminalPort` (just the port number — never a
shell token). Tokens flow via the cookie path, never /health, because
/health already surfaces AUTH_TOKEN to localhost callers in headed mode
(that's a separate v1.1+ TODO).
- /pty-session and /terminal/* are deliberately NOT added to TUNNEL_PATHS,
so the dual-listener tunnel surface 404s by default-deny.
- Shutdown path now also pkills terminal-agent and unlinks its state files
(terminal-port + terminal-internal-token) so a reconnect doesn't try to
hit a dead port.
cli.ts:
- After spawning sidebar-agent.ts, also spawn terminal-agent.ts. Same
pattern: pkill old instances, Bun.spawn(['bun', 'run', script]) with
BROWSE_STATE_FILE + BROWSE_SERVER_PORT env. Non-fatal if the spawn
fails — chat still works without the terminal agent.
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