Kian Jones f55ff3a822 fix(core): descriptive error for empty message_ids instead of IndexError (#9464) ...

fix(core): replace IndexError with descriptive error for empty message_ids

Agent with no in-context messages (empty/None message_ids) would crash
with a cryptic IndexError on message_ids[0]. Now raises a clear
LettaError explaining the system message was not initialized.

Datadog: https://us5.datadoghq.com/error-tracking/issue/6c061c28-0830-11f1-b060-da7ad0900000

🐾 Generated with [Letta Code](https://letta.com)

Co-authored-by: Letta <noreply@letta.com>

2026-02-24 10:52:07 -08:00

..

adapters

fix: catch contextwindowexceeded error on gemini (#9450)

2026-02-24 10:52:07 -08:00

agents

fix(core): descriptive error for empty message_ids instead of IndexError (#9464)

2026-02-24 10:52:07 -08:00

cli

chore: remove sync db (#4873)

2025-10-07 17:50:45 -07:00

client

chore: remove sync db (#4873)

2025-10-07 17:50:45 -07:00

data_sources

feat: git smart HTTP for agent memory repos (#9257)

2026-02-24 10:52:06 -08:00

exceptions

feat: global exception middleware (#6017)

2025-11-13 15:36:55 -08:00

functions

fix(core): strip quotes from MCP server header keys and values (#9349)

2026-02-24 10:52:07 -08:00

groups

feat: add summary message and event on compaction (#9144)

2026-02-24 10:52:05 -08:00

helpers

fix(core): handle Anthropic overloaded errors and Unicode encoding issues (#9305)

2026-02-24 10:52:06 -08:00

humans

merge this (#4759)

2025-09-17 15:47:40 -07:00

interfaces

fix(core): preserve thought_signature on TextContent in Gemini streaming path (#9461)

2026-02-24 10:52:07 -08:00

jobs

fix: use async_session_factory directly in scheduler (#5944)

2025-11-13 15:36:50 -08:00

llm_api

fix(core): catch bare openai.APIError in handle_llm_error (#9468)

2026-02-24 10:52:07 -08:00

local_llm

fix(core): reject empty API keys in Bearer auth headers (#9350)

2026-02-24 10:52:07 -08:00

model_specs

feat: add glm 5 to core (#9436)

2026-02-24 10:52:07 -08:00

monitoring

feat: dump thread state on event loop hang (#8388)

2026-01-12 10:57:48 -08:00

openai_backcompat

merge this (#4759)

2025-09-17 15:47:40 -07:00

orm

fix(core): catch LockNotAvailableError and return 409 instead of 500 (#9359)

2026-02-24 10:52:07 -08:00

otel

Revert "feat: add statement_timeout to SQLAlchemy OTEL spans" (#9224)

2026-02-24 10:52:06 -08:00

personas

merge this (#4759)

2025-09-17 15:47:40 -07:00

plugins

chore: cleanup experimental flag (#4818)

2025-10-07 17:50:44 -07:00

prompts

fix: improve summarization prompts (#8764)

2026-01-19 15:54:41 -08:00

schemas

fix(core): stabilize system prompt refresh and expand git-memory coverage (#9438)

2026-02-24 10:52:07 -08:00

serialize_schemas

feat: add agents_runs table (#4768)

2025-10-07 17:50:44 -07:00

server

fix(core): catch bare openai.APIError in handle_llm_error (#9468)

2026-02-24 10:52:07 -08:00

services

fix(core): preserve git-memory formatting and enforce lock conflicts (#9451)

2026-02-24 10:52:07 -08:00

templates

merge this (#4759)

2025-09-17 15:47:40 -07:00

types

merge this (#4759)

2025-09-17 15:47:40 -07:00

__init__.py

bump version

2026-01-29 12:45:45 -08:00

agent.py

chore: remove sync db (#4873)

2025-10-07 17:50:45 -07:00

config_file.py

feat: add support for YAML config file (#8999)

2026-02-24 10:52:06 -08:00

config.py

merge this (#4759)

2025-09-17 15:47:40 -07:00

constants.py

feat: add glm 5 to core (#9436)

2026-02-24 10:52:07 -08:00

database_utils.py

chore: sync 0.12.0 version (#3023)

2025-10-08 16:10:51 -07:00

errors.py

fix(core): catch bare openai.APIError in handle_llm_error (#9468)

2026-02-24 10:52:07 -08:00

interface.py

merge this (#4759)

2025-09-17 15:47:40 -07:00

log_context.py

feat(logs): Enrich logs with context-aware primtive types (#5949)

2025-11-13 15:36:55 -08:00

log.py

feat: Ship traces to datadog and add trace correlation (#6311)

2025-11-24 19:10:26 -08:00

main.py

chore: rm composio (#5151)

2025-10-07 17:50:49 -07:00

pytest.ini

merge this (#4759)

2025-09-17 15:47:40 -07:00

settings.py

feat: set memfs env vars in deploy wf (#9318)

2026-02-24 10:52:06 -08:00

streaming_interface.py

merge this (#4759)

2025-09-17 15:47:40 -07:00

streaming_utils.py

merge this (#4759)

2025-09-17 15:47:40 -07:00

system.py

Revert "feat: bring back use message packing for timezone [LET-6846]" (#9302)

2026-02-24 10:52:06 -08:00

utils.py

fix: anthropic tool sanitation (#9310)

2026-02-24 10:52:06 -08:00

validators.py

feat: add user id validation (#9128)

2026-01-29 12:44:04 -08:00