[MODEL] Sub Agent delegatation does not work
Preflight Checklist
- [x] I have searched existing issues for similar behavior reports
- [x] This report does NOT contain sensitive information (API keys, passwords, etc.)
Type of Behavior Issue
Claude ignored my instructions or configuration
What You Asked Claude to Do
Since you guys release Opus 4.5
Sonnet 4.5 refuse to delegate work to sub agent (Haiku 4.5)
I have 2 pc with claude code, one for my work the other one for my personal
So i tested this on 2 pc
Usually, to save token, I always ask Haiku 4.5 to do the work, Sonnet 4.5 for thinking and planning (like what you teached us)
What Claude Actually Did
Before
- Sonnet create a plan and let Haiku to implement
After
- Sonnet create a plan and continue to work in implementation
- Even if asking Sonnet to delegate the work, it keeps doing it by himself but still never delegate the work
- Even during planning asking Sonnet to let Haiku to implement, it makes Haiku also doing planning and then Sonnet working on implementation
Expected Behavior
It should let sub agent to do the implementation
This is working before
Files Affected
Permission Mode
Accept Edits was ON (auto-accepting changes)
Can You Reproduce This?
Yes, every time with the same prompt
Steps to Reproduce
- During planning mode, ask Sonnet to make a plan and let sub agent (Haiku) to implement
Claude Model
Sonnet
Relevant Conversation
Impact
High - Significant unwanted changes
Claude Code Version
2.0.55 (Claude Code)
Platform
Anthropic API
Additional Context
Usually I have long sessions of Claude Code due saving with Haiku, now Sonnet keep doing his own think then the session is very short.
While I understand the urge of keep updating stuff but stuff start to broken.
5 Comments
Who is plan agent?
It also create exhaustive to do list of plan in ``
.claude/plans/async-greeting-blanket-agent-3eb0f05d.md``and 5 hours limit reached by making a plan...
Asking to make a plan
Main agent make a plan
Main agent ask plan agent to make a plan
Plan agent make a plan
Dunno which agent make exaxt code change plan
Make another plan
Another implementation plan
So 5 plans plus readme.md
The only way to do delegation is to put it in claude.md instead of prompt
Last one, implementation summary
when you use /init to create CLAUDE.md
putting instruction for subagent delegation is ignored....
weird that I the only one face this issue.
anyway I found the way to make it work again.
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