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praxis/server/assist/mode_conflict.py
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Praxis CI ec397f2c65 docs(milestone): complete v0.5-live-assist — v0.1.13 tagged, milestone release, merged to main
v0.5 (Live Assist — on-the-job voice companion) milestone complete.
4 phases: P0 (pre-execution, v0.1.10) → P1 (assist core + guardrail,
v0.1.11) → P2 (integration + tech-debt + NFR, v0.1.12) → P3 (final
review + ship, v0.1.13 = milestone release).

16/16 REQs covered (3 ASSIST + 4 NFR + 9 IDEATE). 4 v0.6 backlog.
469 tests passed, 0 failed. 1 P0 fixed (guardrail processor safety).
8 P1+ flagged for v0.6. 8 v0.4 P1+ tech-debt addressed.
G-049 + G-067 grill MUSTs resolved. ESCALATION-01 (PIPEDA) OPEN for
human legal review before assist surface go-live.

---ci---
project: praxis
phase: 3
milestone: v0.5
status: complete
requirements:
  covered: [REQ-ASSIST-01, REQ-ASSIST-02, REQ-ASSIST-03, REQ-NFR-ASSIST-01, REQ-NFR-ASSIST-02, REQ-NFR-ASSIST-03, REQ-NFR-ASSIST-04, REQ-IDEATE-01, REQ-IDEATE-02, REQ-IDEATE-03, REQ-IDEATE-04, REQ-IDEATE-05, REQ-IDEATE-06, REQ-IDEATE-07, REQ-IDEATE-08, REQ-IDEATE-09]
  partial: []
---/ci---
2026-08-04 22:35:56 +00:00

44 lines
1.7 KiB
Python

"""Mode-conflict guard — assist vs practice mutual exclusivity (REQ-IDEATE-03, TASK-01-05).
D-061 states assist is a separate mode (not concurrent with practice). This
module enforces mutual exclusivity on the server side: starting an assist shift
while a practice session is active (or vice versa) raises ModeConflictError.
The existing /pipecat/webrtc endpoint (practice) calls enforce_mutual_exclusivity(
..., 'practice'); the new /api/assist/shift/start endpoint calls it with 'assist'.
"""
from __future__ import annotations
from db.store import PraxisStore
class ModeConflictError(Exception):
"""Raised when a learner tries to start a session of one type while an
active session of the other type exists (REQ-IDEATE-03)."""
async def enforce_mutual_exclusivity(
store: PraxisStore, learner_id: str, requested_type: str
) -> None:
"""Raise ModeConflictError if the learner has an active session of the
*other* type.
requested_type: 'assist' or 'practice'. Ended sessions don't trigger the
conflict (only active sessions count — ended_at IS NULL).
"""
other_type = "practice" if requested_type == "assist" else "assist"
active = await store.get_active_session(learner_id, other_type)
if active is not None:
if requested_type == "assist":
raise ModeConflictError(
"Cannot start assist shift: a practice session is active. "
"End the practice session first."
)
raise ModeConflictError(
"Cannot start practice session: an assist shift is active. "
"End the shift first."
)
__all__ = ["enforce_mutual_exclusivity", "ModeConflictError"]