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Replace the Antigravity (agy) integration — a PTY wrapping the TUI with
output-marker scraping ('? for shortcuts', 'Generating', trust dialogs,
/model picker navigation, quota-screen regex) — with a headless print-mode
transport: every user turn spawns `agy -p <msg> --conversation <uuid>
--output-format stream-json`, and NDJSON events (init/step_update/result)
map onto the existing transcript-entry channel (sendAgySessionMessage), so
hub/web rendering is unchanged. ~8.3k LOC (incl. tests) removed.
Fixes #1588. Design: docs/design/agy-headless-transport.md.
CLI:
- new cli/src/agy/headless/: agyNdjsonParser (pure functions, malformed-line
tolerance, step conversation-id adoption), AgyPlannerAccumulator (per-step
delta accumulation with settling retries), AgyHeadlessDriver (per-turn
spawn/kill loop, NDJSON chunk buffering, authoritative delivery ack via
user_input/result, interrupt + retry + shutdown lifecycle with consume/
restore, process-tree termination, SSH agent preserved, prompt log
redaction, per-turn model snapshot with conversation-DB fallback)
- runAgy/loop/session rewired; agy is remote-only (no PTY, no local mode,
no local-switch action); queued batches snapshot model/effort/mode
- deleted agyPty, agyPtyLauncher, agyHookCarrier(+scope cache), agyModelKeys,
agyQuestionKeys, agyAskQuestion, agySessionScanner, agyPermissionHandler
(+tests); buildAgyHooksJson removed; startHookServer agy-pre-invocation
route → 200 no-op
- runner: agy reopen/resume via generic --existing-session-id; commands/
agy.ts defaults remote; resume rejects ACTIVE agy sessions (remote-only,
in-flight turns cannot hand off)
- MCP stays user-managed (agy reads ~/.gemini/config/mcp_config.json and
workspace .agents/mcp_config.json natively in headless — verified)
Hub/web:
- machines.ts drops agy→pty forcing and rejects non-remote startingMode
- NewSession drops agy startingMode='pty'; terminal toggle disappears
automatically; RemoteModeDisplay hides the local-switch hint when absent
- docs/guide/agents.md updated: headless print mode, no PTY/hooks, MCP via
user's own mcp_config.json
Tests: 47 parser+driver tests (fake-binary e2e, chunk-split NDJSON, delivery
ack semantics, interrupt/retry/shutdown races, model attribution, EOF
framing, malformed envelopes); full suite green (cli ~2340, hub 1093,
web 2474, shared 262). Real-binary smoke on agy 1.1.13: single turn exit 0,
--conversation resume keeps the same conversation_id.