[Bug]: "Message ID alias capacity exceeded. Cannot allocate more than m9999 aliases in this session" when using with a long-term running session

[jiwangyihao]

Bug Description

When LLM called compress, below error occured:

error: Message ID alias capacity exceeded. Cannot allocate more than m9999 aliases in this session.
at allocateNextMessageRef (C:\Users\34404.cache\opencode\node_modules@tarquinen\opencode-dcp\dist\lib\message-ids.js:110:15)at assignMessageRefs (C:\Users\34404.cache\opencode\node_modules@tarquinen\opencode-dcp\dist\lib\message-ids.js:91:21)at (C:\Users\34404.cache\opencode\node_modules@tarquinen\opencode-dcp\dist\lib\hooks.js:90:9)

2026-03-22T04-28-23-409Z.json
2026-03-22T04-27-02-797Z.json
2026-03-22T04-27-48-878Z.json
2026-03-22T04-28-11-362Z.json

Expected Behavior

No errors.

Debug Context Logs

Meet length constraits so uploaded in Bug Description Section.

Tool Call Details

No response

DCP Version

3.0.4

Opencode Version

1.2.27

Model

Other (specify in description)

Additional Context

I'm using GitHub Copilot's GPT-5.4 model

[Tarquinen]

Interesting, will take a look not really sure what happened yet. Is this an extremely long session that was compacted many times?

[jiwangyihao]

Interesting, will take a look not really sure what happened yet. Is this an extremely long session that was compacted many times?

yes

[Tarquinen]

yea found the issue, will be fixed in next release today or tomorrow