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Fable 5 vs. GPT-5.6 Sol on an NP-Hard Problem: Does /goal Help?

charlesazam.com · published 17 July 2026

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https://github.com/charles-azam/CLIArena

github.com

I benchmarked 4 CLI coding agents on an NP-hard optimization problem I solved by hand 8 years ago. Read at the source ↗

charlesazam.com

https://code.claude.com/docs/en/goal

code.claude.com

https://github.com/openai/codex/tree/rust-v0.144.4

github.com

https://github.com/openai/codex/blob/rust-v0.144.4/codex-rs/tui/src/app/thread_goal_actions.rs

github.com

https://github.com/openai/codex/blob/rust-v0.144.4/codex-rs/state/goals_migrations/0001_thread_goals.sql

github.com

https://github.com/openai/codex/blob/rust-v0.144.4/codex-rs/ext/goal/src/spec.rs

github.com

https://github.com/openai/codex/blob/rust-v0.144.4/codex-rs/ext/goal/src/runtime.rs

github.com

https://github.com/openai/codex/blob/rust-v0.144.4/codex-rs/ext/goal/templates/goals/continuation.md

github.com