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lerobot-clone/src
Pepijn 3434d2ef22 fix(annotate): ground interjections in video + propagate text to plan refresh
qwen36moe-10 showed three Module-2 / plan-refresh quality issues that
are not architecture problems — they're prompt-grounding bugs:

1. Interjection prompt passed ``current_subtask = record.episode_task``
   (the WHOLE-episode task), not the actual subtask in force at the
   chosen timestamp. The VLM had no signal about what was visible at
   that moment, so its interjections were generic ("actually skip X"
   where X had nothing to do with the visible activity).

2. Interjection prompt only attached a single frame
   (``frames_at(record, [t_snap])``). With one frozen image the VLM
   couldn't read the ongoing motion. Module 1 already gets the whole
   episode video for subtask decomposition, which is why subtasks are
   well-grounded; Module 2 was the outlier.

3. The plan-refresh prompt told the model "a plan refresh after a user
   interjection at t=X.YZs" but never showed it the interjection
   *text*. So the refreshed plan couldn't actually reflect the user's
   correction — at best it recombined the same step list.

Fix:

- ``interjections_and_speech.py``: Module 2 reads Module 1's subtask
  rows from the same staging tree (executor orders module_1 → module_2
  so they're already there) and resolves the actual ``current_subtask``
  at each chosen timestamp. Pulls a small clip
  (``interjection_window_seconds`` × ``interjection_window_frames``,
  defaulting to 4 frames over the leading 2 s) instead of one frame.
  Drops the silently-zeroing ``len(candidate_ts) // 4`` cap on the
  interjection count.

- ``module_2_interjection.txt``: prompt is rewritten to reference the
  multi-frame visual context and require the interjection to mention
  something visible OR named in the current subtask, not invented.

- ``plan_subtasks_memory.py``: ``run_plan_updates`` now accepts and
  threads through interjection texts. ``_generate_plan(refresh_t,
  interjection)`` injects both the current subtask AND the interjection
  text into the prompt so the refreshed plan can drop / reorder /
  constrain steps to match the user's correction. (Plan still refreshes
  ONLY at user interjections — subtask generation runs ~1 Hz at
  inference, plan re-emission is event-driven.)

- ``executor.py``: forwards ``interjection_texts`` alongside
  ``interjection_times`` to ``run_plan_updates``.

- ``Module2Config``: bumps ``max_interjections_per_episode`` default
  from 1 to 3 and exposes ``interjection_window_seconds`` /
  ``interjection_window_frames``.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-04-30 18:48:36 +02:00
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