Files
chat/chat/config.py
T
Joseph Doherty d161e7b8e9 feat: cap narrative response length + tune sampling
Bot replies were running long (4 paragraphs of action+dialogue beats
per turn) because we never set max_tokens on the narrative call. Three
tunable knobs now in Settings (set in data/config.toml to override):

- narrative_max_tokens: int = 400
  Hard cap on each generated response. ~400 tokens ≈ 1–2 short
  paragraphs. Drop to 200 for terse banter, bump to 800+ for longer
  scenes.

- narrative_temperature: float = 0.85
  Sampling temperature. 0.7 = grounded/consistent (slightly stiff),
  0.85 = creative-but-in-character (default), 1.0 = wide variety,
  >1.0 = often off-the-rails.

- prompt closing instruction now nudges: "Keep your response to a
  single beat — one or two short paragraphs at most. Don't monologue;
  leave room for the other person to react."

Both turns.py (post_turn) and regenerate.py forward the params to
client.stream(). FeatherlessClient already passes **params through to
the OpenAI-compat endpoint.

Note: temperature doesn't control length — that was a common
misconception. max_tokens is the actual length cap. Lower temperature
makes word choice more predictable (slightly stiffer voice), not
shorter. Both knobs are useful for different goals.
2026-04-26 15:28:08 -04:00

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from __future__ import annotations
import os
import tomllib
from pathlib import Path
from pydantic import BaseModel, Field
REPO_ROOT = Path(__file__).resolve().parent.parent
DEFAULT_CONFIG = REPO_ROOT / "data" / "config.toml"
DEFAULT_DB = REPO_ROOT / "data" / "chat.db"
class Settings(BaseModel):
featherless_api_key: str
featherless_base_url: str = "https://api.featherless.ai/v1"
narrative_model: str = "dphn/Dolphin-Mistral-24B-Venice-Edition"
classifier_model: str = "NousResearch/Hermes-3-Llama-3.1-8B"
classifier_fallbacks: list[str] = Field(
default_factory=lambda: [
"cognitivecomputations/dolphin-2.9.4-llama3-8b",
"mlabonne/Meta-Llama-3.1-8B-Instruct-abliterated",
]
)
ooc_marker: str = "(("
retrieval_k: int = 4
narrative_budget_hard: int = 8000
narrative_budget_soft: int = 6000
# Cap on each generated bot response. ~400 tokens ≈ 12 short paragraphs.
# Bump if you want longer scenes; drop to 200 for terse banter.
narrative_max_tokens: int = 400
# Sampling temperature for narrative generation. 0.7 = grounded /
# consistent; 0.85 = creative-but-in-character (default); 1.0 = wide
# variety, can drift; >1.0 = often off-the-rails.
narrative_temperature: float = 0.85
classifier_budget_hard: int = 4000
classifier_timeout_s: float = 30.0
# Featherless free tier and lower paid tiers cap concurrent connections.
# Set this to your account's max-concurrent-connections limit.
featherless_max_concurrent: int = 2
db_path: Path = DEFAULT_DB
data_dir: Path = REPO_ROOT / "data"
bind_host: str = "127.0.0.1"
bind_port: int = 8000
def load_settings() -> Settings:
config_path = Path(os.environ.get("CHAT_CONFIG_PATH", DEFAULT_CONFIG))
raw: dict = {}
if config_path.exists():
raw = tomllib.loads(config_path.read_text())
if "CHAT_DB_PATH" in os.environ:
raw["db_path"] = Path(os.environ["CHAT_DB_PATH"])
if "CHAT_DATA_DIR" in os.environ:
raw["data_dir"] = Path(os.environ["CHAT_DATA_DIR"])
elif "data_dir" not in raw and "db_path" in raw:
# T31: when ``CHAT_DB_PATH`` is overridden (typical in tests) but
# ``data_dir`` isn't, derive ``data_dir`` from the db's parent so
# snapshot/auxiliary files stay alongside the test db rather than
# leaking into the real repo data dir.
raw["data_dir"] = Path(raw["db_path"]).parent
return Settings(**raw)