Keep every retried attempt instead of deleting it

Retry used to delete the last AI action and generate a replacement, so the
discarded narration was simply gone. The row survives now: each attempt is
appended to actions.variants with variant_index naming the live one, and a
ChatGPT-style pager under the message browses them.

Action.text still mirrors the active variant, so the context builder, memory
bank, summarizer and export needed no changes. A variant carries only what
differs between attempts -- the text, the reasoning, and the state it
produced -- never the assembled prompt, which is identical across attempts of
one turn and is the bulk of context_snapshot.

Only the last message can be switched, restoring the script/world state that
attempt produced; earlier turns were written as a continuation of whatever is
active there, so theirs are read-only previews.

Three things that would otherwise bite:

- generate_turn now wraps _generate_turn and watches for a save sentinel. If
  the generator ends without it (provider error, empty reply, script stop,
  client hangup) it re-applies the previous variant -- otherwise a failed
  retry leaves rolled-back stats under un-rolled-back text.
- Retry reuses the turn's own index rather than next_index, or the clock the
  world-state cooldowns run on advances on a re-run of the same turn.
- Editing a message rewrites the active variant too, or paging away and back
  silently reverts the edit.

Migrations 34/35 verified as an upgrade against a populated database, not
just a fresh schema. test_state_revert's retry test asserted the old delete
behaviour and was rewritten.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UeQVy5bEjLhfgWNc27Efet
This commit is contained in:
parththakkar106
2026-08-02 20:44:06 +05:30
co-authored by Claude Opus 5
parent be6dbb0f24
commit 906ba423d8
9 changed files with 734 additions and 22 deletions
+323
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@@ -0,0 +1,323 @@
"""End-to-end HTTP tests for retry history: every attempt at an AI turn is kept
as a variant of the same action, browsable and (for the last message)
switchable, restoring the world/script state that attempt produced.
python -m pytest tests/test_retry_variants.py -v
"""
import os
import tempfile
_tmp = tempfile.NamedTemporaryFile(suffix=".db", delete=False)
_tmp.close()
os.environ["AIDND_DB_PATH"] = _tmp.name
os.environ.pop("AIDND_DATABASE_URL", None)
os.environ.pop("DATABASE_URL", None)
import pytest
from fastapi import Depends
from fastapi.testclient import TestClient
from app import auth, limits, models
from app.database import Base, SessionLocal, engine, get_db
from app.main import app
from app.providers import PromptParts, ProviderError
from app.routers import adventures
SCHEMA = {"player": {"hp": {"min": 0, "max": 100, "initial": 100}}}
# Each turn spends 10 gold, so a double-applied or un-rolled-back attempt shows.
GOLD_SCRIPT = """
const modifier = (text) => {
state.gold = (state.gold || 0) + 10;
return { text };
};
modifier(text);
"""
class ScriptedProvider:
"""Streams the next canned reply each call, so successive retries differ."""
replies: list = []
calls = 0
def __init__(self, *a, **k):
pass
async def generate(self, parts: PromptParts, *, temperature, max_tokens):
index = min(ScriptedProvider.calls, len(ScriptedProvider.replies) - 1)
ScriptedProvider.calls += 1
reply = ScriptedProvider.replies[index]
if isinstance(reply, Exception):
raise reply
yield ("text", reply)
@pytest.fixture()
def client(monkeypatch):
Base.metadata.create_all(bind=engine)
setup = SessionLocal()
user = models.User(is_guest=False, email="variants@example.com")
setup.add(user)
setup.flush()
setup.add(models.Settings(user_id=user.id, api_key="enc:dummy", model="test-model"))
scenario = models.Scenario(user_id=user.id, title="S", stat_schema=SCHEMA)
setup.add(scenario)
setup.flush()
adv = models.Adventure(
user_id=user.id, title="Cave", scenario_id=scenario.id,
script_state={}, world_state={"player": {"hp": 100}},
)
setup.add(adv)
setup.flush()
setup.add(models.Action(adventure_id=adv.id, index=0, type="start", text="You enter a cave."))
setup.add(models.AdventureScript(
adventure_id=adv.id, position=0, enabled=True, name="Gold", output_js=GOLD_SCRIPT,
))
setup.commit()
adv_id, user_id = adv.id, user.id
setup.close()
ScriptedProvider.replies = ["Attempt one."]
ScriptedProvider.calls = 0
monkeypatch.setattr(adventures, "OpenAICompatibleProvider", ScriptedProvider)
monkeypatch.setattr(auth, "resolve_provider_config", lambda s: auth.ProviderConfig(
"http://fake", "k", "test-model", False))
monkeypatch.setattr(limits, "rate_limit", lambda *a, **k: None)
monkeypatch.setattr(limits, "check_row_cap", lambda *a, **k: None)
def _current_user(db=Depends(get_db)):
return db.get(models.User, user_id)
app.dependency_overrides[auth.get_current_user] = _current_user
c = TestClient(app)
c.adv_id = adv_id
try:
yield c
finally:
app.dependency_overrides.clear()
adventures._active_turns.clear()
Base.metadata.drop_all(bind=engine)
def _adv(adv_id):
db = SessionLocal()
try:
adv = db.get(models.Adventure, adv_id)
return adv.script_state, adv.world_state
finally:
db.close()
def _actions(client):
return client.get(f"/api/adventures/{client.adv_id}").json()["actions"]
def _play(client, text="look around"):
r = client.post(f"/api/adventures/{client.adv_id}/actions",
json={"type": "do", "text": text})
assert r.status_code == 200, r.text
def _retry(client):
r = client.post(f"/api/adventures/{client.adv_id}/retry")
assert r.status_code == 200, r.text
return r
# ---------------------------------------------------------------- keeping them
def test_retry_keeps_the_discarded_attempt(client):
ScriptedProvider.replies = ["Attempt one.", "Attempt two."]
_play(client)
assert _actions(client)[-1]["text"] == "Attempt one."
_retry(client)
actions = _actions(client)
# One AI action still, not two — the retry replaced the live text in place.
assert [a["type"] for a in actions] == ["start", "do", "ai"]
last = actions[-1]
assert last["text"] == "Attempt two."
assert last["variant_count"] == 2
assert last["variant_index"] == 1
r = client.get(f"/api/adventures/{client.adv_id}/actions/{last['id']}/variants")
assert r.status_code == 200, r.text
assert [v["text"] for v in r.json()] == ["Attempt one.", "Attempt two."]
assert [v["active"] for v in r.json()] == [False, True]
def test_never_retried_action_has_no_variants(client):
_play(client)
last = _actions(client)[-1]
assert last["variant_count"] == 0
assert client.get(
f"/api/adventures/{client.adv_id}/actions/{last['id']}/variants").json() == []
def test_three_attempts_all_kept_in_order(client):
ScriptedProvider.replies = ["One.", "Two.", "Three."]
_play(client)
_retry(client)
_retry(client)
last = _actions(client)[-1]
assert last["variant_count"] == 3
assert last["variant_index"] == 2
variants = client.get(
f"/api/adventures/{client.adv_id}/actions/{last['id']}/variants").json()
assert [v["text"] for v in variants] == ["One.", "Two.", "Three."]
# ---------------------------------------------------------------- switching
def test_switching_back_restores_that_attempt_state(client):
ScriptedProvider.replies = [
"You take a scratch.\n```state\n{\"player.hp\": -5}\n```",
"You take a beating.\n```state\n{\"player.hp\": -40}\n```",
]
_play(client)
assert _adv(client.adv_id)[1]["player"]["hp"] == 95
_retry(client)
script_state, world_state = _adv(client.adv_id)
assert world_state["player"]["hp"] == 60
assert script_state == {"gold": 10} # rolled back, not stacked to 20
last = _actions(client)[-1]
r = client.post(
f"/api/adventures/{client.adv_id}/actions/{last['id']}/variant", json={"index": 0})
assert r.status_code == 200, r.text
assert r.json()["text"].startswith("You take a scratch")
assert r.json()["variant_index"] == 0
# The stats follow the narration back.
script_state, world_state = _adv(client.adv_id)
assert world_state["player"]["hp"] == 95
assert script_state == {"gold": 10}
# And forward again.
client.post(f"/api/adventures/{client.adv_id}/actions/{last['id']}/variant",
json={"index": 1})
assert _adv(client.adv_id)[1]["player"]["hp"] == 60
def test_switching_updates_the_world_change_chips(client):
ScriptedProvider.replies = [
"A scratch.\n```state\n{\"player.hp\": -5}\n```",
"A beating.\n```state\n{\"player.hp\": -40}\n```",
]
_play(client)
_retry(client)
last = _actions(client)[-1]
assert last["world_changes"][0]["delta"] == -40
client.post(f"/api/adventures/{client.adv_id}/actions/{last['id']}/variant",
json={"index": 0})
assert _actions(client)[-1]["world_changes"][0]["delta"] == -5
def test_cannot_switch_a_turn_the_story_moved_past(client):
ScriptedProvider.replies = ["One.", "Two.", "Three."]
_play(client)
_retry(client)
retried = _actions(client)[-1]
_play(client) # story continues from "Two."
r = client.post(
f"/api/adventures/{client.adv_id}/actions/{retried['id']}/variant", json={"index": 0})
assert r.status_code == 400
assert "latest message" in r.json()["detail"]
# Still readable, though — that's the whole point of keeping them.
variants = client.get(
f"/api/adventures/{client.adv_id}/actions/{retried['id']}/variants").json()
assert [v["text"] for v in variants] == ["One.", "Two."]
def test_switching_to_a_missing_index_is_rejected(client):
ScriptedProvider.replies = ["One.", "Two."]
_play(client)
_retry(client)
last = _actions(client)[-1]
r = client.post(
f"/api/adventures/{client.adv_id}/actions/{last['id']}/variant", json={"index": 7})
assert r.status_code == 400
# ---------------------------------------------------------------- edge cases
def test_failed_retry_leaves_the_previous_attempt_in_charge(client):
"""A provider error mid-retry must undo the rollback, or the stats on
screen would silently disagree with the text still shown."""
ScriptedProvider.replies = ["Attempt one.", ProviderError("upstream is down")]
_play(client)
assert _adv(client.adv_id)[0] == {"gold": 10}
client.post(f"/api/adventures/{client.adv_id}/retry")
actions = _actions(client)
assert actions[-1]["text"] == "Attempt one." # text never lost
assert _adv(client.adv_id)[0] == {"gold": 10} # and the state still matches it
def test_undo_removes_the_action_and_its_history(client):
ScriptedProvider.replies = ["One.", "Two."]
_play(client)
_retry(client)
r = client.post(f"/api/adventures/{client.adv_id}/undo")
assert r.status_code == 200, r.text
assert [a["type"] for a in r.json()] == ["start"]
assert _adv(client.adv_id)[0] == {}
def test_editing_the_text_updates_the_live_variant(client):
ScriptedProvider.replies = ["One.", "Two."]
_play(client)
_retry(client)
last = _actions(client)[-1]
client.patch(f"/api/adventures/{client.adv_id}/actions/{last['id']}",
json={"text": "Two, but better."})
# Page away and back: the edit must survive, not be reverted by the switch.
client.post(f"/api/adventures/{client.adv_id}/actions/{last['id']}/variant",
json={"index": 0})
client.post(f"/api/adventures/{client.adv_id}/actions/{last['id']}/variant",
json={"index": 1})
assert _actions(client)[-1]["text"] == "Two, but better."
def test_retry_keeps_the_turn_index(client):
"""A retry re-runs the same turn, so the world-state clock (which drives
cooldowns) must not advance."""
ScriptedProvider.replies = ["One.", "Two."]
_play(client)
before = _actions(client)[-1]["index"]
_retry(client)
assert _actions(client)[-1]["index"] == before
def test_export_and_import_round_trips_variants(client):
ScriptedProvider.replies = ["One.", "Two."]
_play(client)
_retry(client)
bundle = client.get(f"/api/adventures/{client.adv_id}/export").json()
ai = [a for a in bundle["actions"] if a["type"] == "ai"][0]
assert [v["text"] for v in ai["variants"]] == ["One.", "Two."]
assert ai["variantIndex"] == 1
r = client.post("/api/adventures/import", json=bundle)
assert r.status_code == 201, r.text
imported = r.json()["id"]
actions = client.get(f"/api/adventures/{imported}").json()["actions"]
assert actions[-1]["variant_count"] == 2
assert actions[-1]["variant_index"] == 1
def test_import_clamps_an_out_of_range_variant_index(client):
bundle = {
"format": "ai-dnd-adventure-v1", "title": "Hand-edited",
"actions": [{
"index": 0, "type": "ai", "text": "Only.",
"variants": [{"text": "Only."}], "variantIndex": 9,
}],
}
r = client.post("/api/adventures/import", json=bundle)
assert r.status_code == 201, r.text
actions = client.get(f"/api/adventures/{r.json()['id']}").json()["actions"]
assert actions[0]["variant_index"] == 0
+9 -3
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@@ -178,8 +178,8 @@ def test_snapshot_state_handles_non_dict(db):
# ---------------------------------------------------------------- retry
def test_retry_restores_state_before_regenerating(db, monkeypatch):
# Retry deletes the last AI action and must roll the scoreboard back to that
# action's snapshot so regeneration doesn't stack output mutations.
# Retry must roll the scoreboard back to the AI action's snapshot so
# regeneration doesn't stack output mutations on the discarded attempt.
user, adv = _make_adventure(db, {"gold": 20}) # 20 = double-applied bug value
_add(db, adv, 0, "start")
_add(db, adv, 1, "do", state_before={"gold": 0})
@@ -197,5 +197,11 @@ def test_retry_restores_state_before_regenerating(db, monkeypatch):
adventures.retry_action(adv.id, request=None, db=db, user=user)
assert adv.script_state == {"gold": 10}
assert [a.type for a in adv.actions] == ["start", "do"]
# The row survives now (it used to be deleted) so the discarded attempt
# stays readable — it's kept as variant 0.
assert [a.type for a in adv.actions] == ["start", "do", "ai"]
last = adv.actions[-1]
assert len(last.variants) == 1
assert last.variant_index == 0
assert last.variants[0]["script_state"] == {"gold": 20} # the attempt's outcome
adventures._active_turns.discard(adv.id)