GPT models (5.3-codex, 5.4, etc.) frequently hang when using apply_patch
due to verification loops. This adds:
1. Tool restriction: apply_patch is denied for GPT variants of
Hephaestus, Sisyphus-Junior, and Sisyphus agents
2. Prompt guidance: GPT-specific prompts now explicitly instruct using
edit/write tools instead of apply_patch
3. Removed the 'Always use apply_patch' instruction from
sisyphus-junior/gpt-5-4.ts that contradicted the fix
The deny is model-conditional — Claude variants retain apply_patch
access since it works reliably there.
- Remove leading pipe characters (|) from duplicated CORRECT block
- Remove duplicated ## Hard Constraints and ### Task Scope Clarification sections
- Properly place Task Scope Clarification section between CORRECT list and Hard Constraints
Addresses review comments by cubic-dev-ai[bot] on PR #2780
- #2741: Pass inheritedModel as fallback in subagent-resolver when user hasn't
configured an override, ensuring custom provider models take priority
- #2648: Fix getPlanProgress to treat plans with 0 checkboxes as incomplete
instead of complete (total > 0 && completed === total)
- #2779: Relax Hephaestus single-task guard to accept multi-step sub-tasks
from Atlas delegation, only rejecting genuinely independent tasks
Fixes#2741, fixes#2648, fixes#2779
Split monolithic hephaestus.ts into directory with model-specific prompt
variants (gpt-5-4.ts, gpt-5-3-codex.ts, gpt.ts) mirroring the
sisyphus-junior pattern. Generic gpt.ts uses pre-codex-tuning prompt as
fallback for non-specific GPT models.
Also adds isGpt5_4Model and isGpt5_3CodexModel helpers to types.ts.
YeonGyu-Kim