everalgo-core 0.2.0

EverAlgo foundation: types, LLM client + providers, prompt validators, testing helpers.

everalgo-core

Foundation distribution of EverAlgo — data types, LLM client + provider routing, prompt helpers, and testing utilities shared by every other everalgo-* package.

See the umbrella project: EverAlgo monorepo and the architecture document at docs/concepts/architecture.md.

Install

pip install everalgo-core

What this distribution provides

Subpackage	What it contains
everalgo.types	All shared data types: MemCell, ChatMessage, ConversationItem, Episode, Foresight, AtomicFact, Profile, AgentCase, AgentSkill, RankInput, RankOutput, Candidate, ScoredItem, ParsedContent, RawFile, tool-call types
everalgo.llm	LLMClient Protocol, LLMConfig, ChatMessage / ChatResponse / Usage, LLMError, build_client factory
everalgo.llm.format	format_atomic_fact_time, format_message_timestamp, format_natural_language_time — timestamp rendering for LLM prompts
everalgo.llm.parse	parse_llm_json_object — three-tier robust JSON-object extraction
everalgo.llm.providers.openai_compat	OpenAICompatClient — wraps openai.AsyncOpenAI
everalgo.prompts	render_prompt — shared template substitution helper
everalgo.testing	FakeLLMClient, CallRecord, and assert_*_shape structural assertion helpers

Quick start

from everalgo.llm import LLMConfig, build_client
from everalgo.llm.types import ChatMessage

config = LLMConfig(model="gpt-4o-mini", api_key="sk-...", base_url="https://api.openai.com/v1")
client = build_client(config)

response = await client.chat(
    messages=[ChatMessage(role="user", content="Hello")],
)
print(response.content)

Using FakeLLMClient in tests

import json
from everalgo.llm.types import ChatResponse
from everalgo.testing import FakeLLMClient

# Scripted mode — responses are returned in order
fake = FakeLLMClient(responses=[
    ChatResponse(content=json.dumps({"title": "T", "content": "C"}), model="fake"),
])

# Handler mode — full control over each call
from everalgo.llm.types import ChatMessage as LLMMsg
def handler(messages: list[LLMMsg], **_) -> ChatResponse:
    return ChatResponse(content="ok", model="fake")

fake = FakeLLMClient(handler=handler)
print(fake.call_count)  # 0

LLM utilities

everalgo.llm.format and everalgo.llm.parse provide prompt-rendering helpers used by boundary detection and every extractor.

everalgo.llm.format — timestamp rendering

from everalgo.llm.format import format_atomic_fact_time, format_message_timestamp, format_natural_language_time

# ISO 8601 UTC anchor — used as inline message prefix in prompts
# e.g. "2023-11-14T22:13:20Z"
ts_str = format_message_timestamp(1_700_000_000_000)

# Human-readable label for LLM time-of-day reasoning
# Example output: "November 14, 2023 (Tuesday) at 10:13 PM UTC"
label = format_natural_language_time(1_700_000_000_000, lang="en")

everalgo.llm.parse — robust JSON extraction

from everalgo.llm.parse import parse_llm_json_object

# Three-tier fallback: fence block → direct loads → outermost braces
result = parse_llm_json_object('```json\n{"key": "value"}\n```')
# → {"key": "value"}

parse_llm_json_object(raw: str) -> dict[str, Any] tries each strategy in order and raises ValueError if all three fail.

everalgo._tokenize — token counting

count_tokens(text: str) → int and force_split(text: str, *, max_tokens: int) → list[str] are module-private utilities (used internally by boundary algorithms; not part of the public everalgo.* surface). They use OpenAI o200k_base encoding via tiktoken.

API surface

Symbol	Module	Role
MemCell	everalgo.types	Boundary-detected conversation slice; items: list[ConversationItem], timestamp: int
ChatMessage	everalgo.types	Chat wire type: id, role, content, timestamp, sender_id, sender_name
ConversationItem	everalgo.types	ChatMessage | ToolCallRequest | ToolCallResult discriminated union
Episode / Foresight / AtomicFact / Profile	everalgo.types	User-side memory output types
AgentCase / AgentSkill	everalgo.types	Agent-side memory output types
RankInput / RankOutput / Candidate / ScoredItem	everalgo.types	Rank I/O contracts
LLMClient	everalgo.llm	Protocol — chat(messages, *, model=None, ...) → ChatResponse
LLMConfig	everalgo.llm	model, api_key (SecretStr), base_url, temperature, max_tokens, timeout
build_client	everalgo.llm	Factory: LLMConfig → LLMClient (returns OpenAICompatClient)
LLMError	everalgo.llm	Base exception raised by all providers
OpenAICompatClient	everalgo.llm.providers.openai_compat	Wraps openai.AsyncOpenAI; no retry logic
format_atomic_fact_time	everalgo.llm.format	Human-readable AtomicFact timestamp label mirroring evercore EventLog (no space before weekday, no UTC suffix)
format_message_timestamp	everalgo.llm.format	ISO 8601 UTC string from a millisecond timestamp
format_natural_language_time	everalgo.llm.format	Human-readable timestamp label; lang="en" or "zh"
parse_llm_json_object	everalgo.llm.parse	Robust JSON-object parser with three-tier fallback
render_prompt	everalgo.prompts	Template substitution for {placeholder} patterns
FakeLLMClient	everalgo.testing	In-memory LLMClient double; responses=[...] or handler=callable
CallRecord	everalgo.testing	Single recorded chat() invocation (for test assertions)
assert_episode_shape	everalgo.testing	Structural assertion: required Episode fields are non-empty
assert_foresight_shape	everalgo.testing	Structural assertion for Foresight
assert_atomic_fact_shape	everalgo.testing	Structural assertion for AtomicFact
assert_profile_shape	everalgo.testing	Structural assertion for Profile

Related distributions

• everalgo-boundary — uses MemCell, ChatMessage, LLMClient
• everalgo-clustering — uses MemCell, LLMClient
• everalgo-rank — uses RankInput, RankOutput, Candidate, ScoredItem
• everalgo-user-memory — uses all user-side types + LLMClient
• everalgo-agent-memory — uses agent-side types + LLMClient