Context

PR #962 adds subprocess mode for subagents, but as noted in reviews by @greptile-apps and confirmed by @ErikBjare:

1. Context configuration (r2627245143): Subprocess mode doesn't respect context_mode and context_include parameters - it always uses default CLI behavior
2. Output schema (r2628004426): output_schema parameter is stored but not passed to subprocess command, so structured output won't work in subprocess mode

Current State

The _run_subagent_subprocess function only passes basic parameters:

• prompt
• logdir
• model
• workspace

Required Changes

Phase 1: CLI Flags

Add new CLI flags to gptme:

• --context-mode (full/minimal/none)
• --context-include (file patterns to include)
• --output-schema (JSON schema for structured output)

Phase 2: Subprocess Integration

Update _run_subagent_subprocess to:

• Accept context configuration parameters
• Accept output schema parameter
• Map parameters to CLI flags

Phase 3: Validation

Ensure subprocess mode behavior matches thread mode for all configuration options.

References

• PR feat(subagent): add Phase 1 async enhancements (subprocess mode, hook notifications, batch) #962: Phase 1 async enhancements
• Review comment r2627245143 (context mode)
• Review comment r2628004426 (output schema)
• Erik's comment: 'Valid concern, should fix'

Priority

Medium - subprocess mode works for basic use cases, but full parameter support needed for parity with thread mode.